[Federal Register Volume 63, Number 28 (Wednesday, February 11, 1998)]
[Notices]
[Pages 6968-7004]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 98-3269]
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NUCLEAR REGULATORY COMMISSION
Biweekly Notice; Applications and Amendments to Facility
Operating Licenses Involving No Significant Hazards Considerations
I. Background
Pursuant to Public Law 97-415, the U.S. Nuclear Regulatory
Commission (the Commission or NRC staff) is publishing this regular
biweekly notice. Public Law 97-415 revised section 189 of the Atomic
Energy Act of 1954, as amended (the Act), to require the Commission to
publish notice of any amendments issued, or proposed to be issued,
under a new provision of section 189 of the Act. This provision grants
the Commission the authority to issue and make immediately effective
any amendment to an operating license upon a determination by the
[[Page 6969]]
Commission that such amendment involves no significant hazards
consideration, notwithstanding the pendency before the Commission of a
request for a hearing from any person.
This biweekly notice includes all notices of amendments issued, or
proposed to be issued from January 16, 1998, through January 30, 1998.
The last biweekly notice was published on January 28, 1998 (63 FR
4308).
Notice of Consideration of Issuance of Amendments to Facility Operating
Licenses, Proposed no Significant Hazards Consideration Determination,
and Opportunity for a Hearing
The Commission has made a proposed determination that the following
amendment requests involve no significant hazards consideration. Under
the Commission's regulations in 10 CFR 50.92, this means that operation
of the facility in accordance with the proposed amendment would not (1)
involve a significant increase in the probability or consequences of an
accident previously evaluated; or (2) create the possibility of a new
or different kind of accident from any accident previously evaluated;
or (3) involve a significant reduction in a margin of safety. The basis
for this proposed determination for each amendment request is shown
below.
The Commission is seeking public comments on this proposed
determination. Any comments received within 30 days after the date of
publication of this notice will be considered in making any final
determination.
Normally, the Commission will not issue the amendment until the
expiration of the 30-day notice period. However, should circumstances
change during the notice period such that failure to act in a timely
way would result, for example, in derating or shutdown of the facility,
the Commission may issue the license amendment before the expiration of
the 30-day notice period, provided that its final determination is that
the amendment involves no significant hazards consideration. The final
determination will consider all public and State comments received
before action is taken. Should the Commission take this action, it will
publish in the Federal Register a notice of issuance and provide for
opportunity for a hearing after issuance. The Commission expects that
the need to take this action will occur very infrequently.
Written comments may be submitted by mail to the Chief, Rules and
Directives Branch, Division of Administration Services, Office of
Administration, U.S. Nuclear Regulatory Commission, Washington, DC
20555-0001, and should cite the publication date and page number of
this Federal Register notice. Written comments may also be delivered to
Room 6D22, Two White Flint North, 11545 Rockville Pike, Rockville,
Maryland from 7:30 a.m. to 4:15 p.m. Federal workdays. Copies of
written comments received may be examined at the NRC Public Document
Room, the Gelman Building, 2120 L Street, NW., Washington, DC. The
filing of requests for a hearing and petitions for leave to intervene
is discussed below.
By March 13, 1998, the licensee may file a request for a hearing
with respect to issuance of the amendment to the subject facility
operating license and any person whose interest may be affected by this
proceeding and who wishes to participate as a party in the proceeding
must file a written request for a hearing and a petition for leave to
intervene. Requests for a hearing and a petition for leave to intervene
shall be filed in accordance with the Commission's ``Rules of Practice
for Domestic Licensing Proceedings'' in 10 CFR Part 2. Interested
persons should consult a current copy of 10 CFR 2.714 which is
available at the Commission's Public Document Room, the Gelman
Building, 2120 L Street, NW., Washington, DC and at the local public
document room for the particular facility involved. If a request for a
hearing or petition for leave to intervene is filed by the above date,
the Commission or an Atomic Safety and Licensing Board, designated by
the Commission or by the Chairman of the Atomic Safety and Licensing
Board Panel, will rule on the request and/or petition; and the
Secretary or the designated Atomic Safety and Licensing Board will
issue a notice of a hearing or an appropriate order.
As required by 10 CFR 2.714, a petition for leave to intervene
shall set forth with particularity the interest of the petitioner in
the proceeding, and how that interest may be affected by the results of
the proceeding. The petition should specifically explain the reasons
why intervention should be permitted with particular reference to the
following factors: (1) the nature of the petitioner's right under the
Act to be made a party to the proceeding; (2) the nature and extent of
the petitioner's property, financial, or other interest in the
proceeding; and (3) the possible effect of any order which may be
entered in the proceeding on the petitioner's interest. The petition
should also identify the specific aspect(s) of the subject matter of
the proceeding as to which petitioner wishes to intervene. Any person
who has filed a petition for leave to intervene or who has been
admitted as a party may amend the petition without requesting leave of
the Board up to 15 days prior to the first prehearing conference
scheduled in the proceeding, but such an amended petition must satisfy
the specificity requirements described above.
Not later than 15 days prior to the first prehearing conference
scheduled in the proceeding, a petitioner shall file a supplement to
the petition to intervene which must include a list of the contentions
which are sought to be litigated in the matter. Each contention must
consist of a specific statement of the issue of law or fact to be
raised or controverted. In addition, the petitioner shall provide a
brief explanation of the bases of the contention and a concise
statement of the alleged facts or expert opinion which support the
contention and on which the petitioner intends to rely in proving the
contention at the hearing. The petitioner must also provide references
to those specific sources and documents of which the petitioner is
aware and on which the petitioner intends to rely to establish those
facts or expert opinion. Petitioner must provide sufficient information
to show that a genuine dispute exists with the applicant on a material
issue of law or fact. Contentions shall be limited to matters within
the scope of the amendment under consideration. The contention must be
one which, if proven, would entitle the petitioner to relief. A
petitioner who fails to file such a supplement which satisfies these
requirements with respect to at least one contention will not be
permitted to participate as a party.
Those permitted to intervene become parties to the proceeding,
subject to any limitations in the order granting leave to intervene,
and have the opportunity to participate fully in the conduct of the
hearing, including the opportunity to present evidence and cross-
examine witnesses.
If a hearing is requested, the Commission will make a final
determination on the issue of no significant hazards consideration. The
final determination will serve to decide when the hearing is held.
If the final determination is that the amendment request involves
no significant hazards consideration, the Commission may issue the
amendment and make it immediately effective, notwithstanding the
request for a hearing. Any hearing held would take place after issuance
of the amendment.
If the final determination is that the amendment request involves a
[[Page 6970]]
significant hazards consideration, any hearing held would take place
before the issuance of any amendment.
A request for a hearing or a petition for leave to intervene must
be filed with the Secretary of the Commission, U.S. Nuclear Regulatory
Commission, Washington, DC 20555-0001, Attention: Rulemakings and
Adjudications Staff, or may be delivered to the Commission's Public
Document Room, the Gelman Building, 2120 L Street, NW., Washington, DC,
by the above date. A copy of the petition should also be sent to the
Office of the General Counsel, U.S. Nuclear Regulatory Commission,
Washington, DC 20555-0001, and to the attorney for the licensee.
Nontimely filings of petitions for leave to intervene, amended
petitions, supplemental petitions and/or requests for a hearing will
not be entertained absent a determination by the Commission, the
presiding officer or the Atomic Safety and Licensing Board that the
petition and/or request should be granted based upon a balancing of
factors specified in 10 CFR 2.714(a)(1)(i)-(v) and 2.714(d).
For further details with respect to this action, see the
application for amendment which is available for public inspection at
the Commission's Public Document Room, the Gelman Building, 2120 L
Street, NW., Washington, DC, and at the local public document room for
the particular facility involved.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The change increases the
surveillance interval to allow verification that a reactivity anomaly
does not exist to every 1100 MWD/T (megawatt-days per metric ton)
average core exposure (approximately 41 days) instead of once every one
effective full power month (approximately 30 days).
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
This change increases the surveillance interval to allow
verification that a reactivity anomaly does not exist every 1100 MWD/T
average core exposure (approximately 41 days) instead of once every one
effective full power month (approximately 30 days). Reactivity
anomalies are not considered to be initiators of any analyzed event.
Operating history has shown that the difference between predicted and
monitored core reactivity is continually acceptable during the extended
Surveillance interval. The consequences of an accident are not affected
by relaxing the Frequency of the Surveillance since the consequences of
an event with a reactivity anomaly during the current interval (due to
not detecting the existence of a reactivity anomaly between
Surveillances) are the same as the consequences of an event with a
reactivity anomaly during the additional period. Additionally, the most
common outcome of the performance of a Surveillance is the successful
demonstration that the acceptance criteria are satisfied. This change
does not alter assumptions relative to the mitigation of an accident or
transient event. Therefore, this change does not involve a significant
increase in the probability or consequences of a previously analyzed
accident.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The change introduces no new mode of plant operation and it does
not involve physical modification to the plant. Therefore, it does not
create the possibility of a new or different kind of accident from any
accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed change is acceptable since the proposed Frequency is
adequate for ensuring a reactivity anomaly does not exist. Operating
history has shown that the difference between predicted and monitored
core reactivity is continually acceptable during the extended
Surveillance interval. Also, this change is considered acceptable since
the most common outcome of the performance of a Surveillance is the
successful demonstration that the acceptance criteria are satisfied.
The safety analysis assumptions will still be maintained, thus, no
question of safety exists. Therefore, this change does not involve a
significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The current Technical
Specifications (TS) for the Brunswick Steam Electric Plant (BSEP) only
address a single inoperable scram accumulator, requiring entry into TS
3.0.3 for direction to shut down a unit if additional scram
accumulators become inoperable. The proposed change corrects this
situation by revising the declared status of control rods with
inoperable scram accumulators and allowing a short out-of-service time
for the control rod scram accumulators before requiring a unit
shutdown, consistent with the Improved Technical Specifications (ITS)
(NUREG-1433, ``Standard Technical Specifications General Electric
Plants, BWR/4,'' Revision 1, April 1995). In the event scram
accumulators are inoperable concurrent with low charging water header
pressure, the ITS require that the reactor mode switch be placed in the
``shutdown'' position, which ensures that all control rods are inserted
and the unit is shutdown. The proposed change deviates from the ITS in
that it requires a manual scram under these conditions which also
ensures that all control rods are inserted and the unit is shutdown.
Details associated with this deviation are included in a Carolina Power
& Light Company letter dated September 11, 1997 (see response to NRC
comment 3.1.5-2), which is available to the public.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
[[Page 6971]]
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change revises the declared status of control rods
with inoperable scram accumulators and allows a short out-of-service
time for the control rod scram accumulators before requiring a plant
shutdown. Inoperable scram accumulators are not considered initiators
for any accidents previously evaluated, and therefore, cannot increase
the probability of such accidents. The extended time period to declare
a control rod inoperable provides a reasonable time to attempt
investigation and restoration of the inoperable control rod scram
accumulator. This time period is acceptable since the time period is
sufficiently short such that it does not increase the risk significance
of an ATWS [anticipated transient without scram] event. Furthermore,
this change will add actions which will address the situation where
multiple control rod scram accumulators may rapidly become inoperable.
In addition, the change that allows modifying the status of a control
rod with an inoperable scram accumulator is acceptable since the
numbers and distribution of control rods are restricted and Technical
Specification actions continue to ensure that the control rods can
still perform their safety function when required. As a result, this
change will not involve a significant increase in the consequences of
an accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not involve physical modification to the
plant. The change in the operation is consistent with current safety
analysis assumptions. Therefore, the change does not create the
possibility of a new or different kind of accident from any accident
previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed change is consistent with the assumptions of the
current safety analysis. The extended time to evaluate and access two
or more inoperable control rod scram accumulators and the allowance to
declare any control rod with an inoperable scram accumulator ``slow''
when operating at a reactor pressure [greater than or equal to] 950
psig proposed by this change is acceptable since adequate controls are
added to the Technical Specifications which ensure charging water
header pressure to the control rod scram accumulators is maintained and
action is provided to immediately shutdown the reactor before the scram
safety function is significantly impacted in the event cha[r]ging water
header pressure cannot be maintained. Therefore, the proposed change
does not involve a significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina.
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed changes extend the
refueling interval surveillance Frequencies that are currently
specified as 18 months for surveillances other than those associated
with instrumentation channel calibration to 24 months.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed changes involve a change in the surveillance Frequency
from 18 months to 24 months. The change in surveillance Frequency is
not assumed to be an accident initiator for any accidents previously
evaluated in the SAR [Updated Final Safety Analysis Report]. Therefore,
this change will have no impact on the probability of an accident
previously evaluated. By changing the Surveillance Frequency from 18
months plus grace to a maximum of 30 months, the consequences of an
accident previously evaluated in the SAR are not significantly
increased. This is based on the fact that the evaluation of the subject
changes demonstrated that the overall impact, if any, on the systems[']
availability is minimal. Since the impact on the systems is minimal, it
can be concluded that the overall impact on the plant accident analysis
is negligible. Furthermore, it is shown that the performance history
for the subject systems does not indicate any failures which would
invalidate the conclusions reached in this evaluation.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
This proposed change will not involve any physical changes to plant
systems, structures, or components. The changes in normal plant
operation are consistent with the current safety analysis assumptions.
Therefore, this change will not create the possibility of a new or
different kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The margin of safety has not been significantly reduced. Although,
there will be an increase in the interval between the subject
surveillance tests, the evaluation of the changes demonstrates that
there is no evidence of any failures which would impact the subject
systems['] availability. Based on the fact that the increased testing
interval has a minimal impact on the subject systems, it can be
concluded that the assumptions in the licensing basis are not impacted
by the changes in the subject requirements and commitments.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
[[Page 6972]]
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-324,
Brunswick Steam Electric Plant, Units 1 and 2, Brunswick County, North
Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change involves a
change in the instrumentation channel calibration surveillance testing
intervals from 18 months to 24 months.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change involves a change in the instrumentation
channel calibration surveillance testing intervals from 18 months to 24
months. The proposed change does not physically impact the plant nor
does it impact any design or functional requirements of the associated
systems. That is, the proposed change does not degrade the performance
or increase the challenges of any safety systems assumed to function in
the accident analysis. The proposed change does not impact the
Surveillance Requirements themselves nor the way in which the
Surveillances are performed. Additionally, the proposed change does not
introduce any new accident initiators since no accidents previously
evaluated have as their initiators anything related to the frequency of
surveillance testing. The proposed change does not affect the
availability of equipment or systems required to mitigate the
consequences of an accident because of the availability of redundant
systems or equipment and because other test[s] performed more
frequently will identify potential equipment problems. Furthermore, a
historical review of surveillance test results indicated that all
failures identified were unique, non-repetitive, and not related to any
time-based failure modes, and indicated no evidence of any failures
that would invalidate the above conclusions. Therefore, the proposed
change does not increase the probability or consequences of an accident
previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change involves a change in the instrumentation
channel calibration surveillance testing intervals from 18 months to 24
months. The proposed change does not introduce any failure mechanisms
of a different type than those previously evaluated since there are no
physical changes being made to the facility. In addition, the
Surveillance Requirements themselves and the way Surveillances are
performed will remain unchanged. Furthermore, a historical review of
surveillance test results indicated no evidence of any failures that
would invalidate the above conclusions. Therefore, the proposed change
does not create the possibility of a new or different kind of accident
from any previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
Although the proposed change will result in an increase in the
interval between surveillance tests, the impact on system availability
is small based on other, more frequent testing or redundant systems or
equipment, and there is no evidence of any failures that would impact
the availability of the systems. Therefore, the assumptions in the
licensing basis are not impacted, and the proposed change does not
involve a significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-324,
Brunswick Steam Electric Plant, Units 1 and 2, Brunswick County, North
Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change allows a
short out-of-service time for various combinations of inoperable
emergency core cooling system (ECCS) subsystems instead of an immediate
plant shutdown.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change allows a short out-of-service time for various
combinations of inoperable ECCS subsystems instead of an immediate
plant shutdown. ECCS equipment is used to mitigate the consequences of
an accident, but the inoperability of ECCS equipment is not considered
as the initiator of any previously analyzed accident. As such, the
inoperability of ECCS subsystems will not increase the probability of
any accident previously evaluated. The proposed combinations of
inoperable ECCS subsystems are bounded by the analysis summarized in
NEDC-31624P which utilizes an NRC [Nuclear Regulatory Commission]
approved methodology for determining consequences. This analysis
demonstrated that adequate core cooling would still be provided with
the proposed change. Therefore, the consequences of an event occurring
during the proposed allowed outage time are the same as the
consequences of an event occurring during the current period allowed to
place the plant in a shutdown condition. As a result, the change does
not involve a significant increase in the consequences of any accident
previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not introduce a new mode of plant
operation and does not involve physical modification to the plant.
Therefore, it does not create the possibility of a new or different
kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed combinations of inoperable ECCS subsystems are bounded
by the analysis summarized in NEDC-31624P which utilizes an NRC
approved methodology. This analysis demonstrated that adequate core
cooling would still be provided with the proposed change. In addition,
the allowable outage time specified is based on a reliability study
(Memorandum from R.L. Baer (NRC) to V. Stello, Jr. (NRC), ``Recommended
Interim Revisions to LCOs [limiting conditions
[[Page 6973]]
for operation] for ECCS Components,'' December 1, 1975) and has been
found to be acceptable through operating experience. Any reduction in
the margin of safety is offset by the benefit of reducing the transient
risk associated with an immediate plant shutdown. Therefore, the change
does not involve a significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change reduces the
number of automatic depressurization system (ADS) valves required to be
OPERABLE from seven to six.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change reduces the number of ADS valves required to be
OPERABLE from seven to six. The number of ADS valves required to be
OPERABLE is not assumed in the initiation of any analyzed event.
Therefore, the change does not increase the probability of an accident
previously evaluated.
The ADS valves function to mitigate the consequences of analyzed
events by reducing the reactor vessel pressure to allow low pressure
ECCS [emergency core cooling system] components to function as needed
in the event of a HPCI [high-pressure coolant injection] System
failure. The change is based on the analysis summarized in NEDC-31624P,
``Brunswick Steam Electric Plant Units 1 and 2 SAFER/GESTR-LOCA Loss-
of-Coolant Accident Analysis,'' Revision 2, July 1990. This analysis
shows that adequate core cooling is provided during a small break LOCA
and a simultaneous HPCI System failure (limiting LOCA) with two of the
seven ADS valves out-of-service. NEDC-31624P was previously reviewed
and accepted by the NRC [Nuclear Regulatory Commission] as documented
in a letter from E.G. Tourigny (NRC) to L.W. Eury (CP&L), ``SAFER/
GESTR-LOCA Analysis, Brunswick Steam Electric Plant, Units 1 and 2 (TAC
Nos. 72854/72855),'' dated 06/01/89 and a letter from E.G. Tourigny
(NRC) to L.W. Eury (CP&L), ``Revision of SAFER/GESTR-LOCA Analysis--
Brunswick Steam Electric Plant, Units 1 and 2 (TAC Nos. 77585 and
77586),'' dated 01/10/91. The change is considered acceptable since the
analyses show that only five ADS valves are required to perform the
intended safety function of lowering reactor pressure. As a result, the
change does not involve a significant increase in the consequences of
an accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not involve physical modification to the
plant and the proposed change continues to provide assurance that the
ADS can perform its intended safety function when required. Therefore,
it does not create the possibility of a new or different kind of
accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
This proposed change does not involve a significant reduction in a
margin of safety since sufficient ADS valves are maintained to ensure
the safety analysis assumptions are met. The safety analysis shows
that, with a HPCI failure, five ADS valves are sufficient to lower
reactor pressure to allow low pressure ECCS injection and cooling.
Thus, the proposed change does not impact the 10 CFR 50.46 limits.
NEDC-31624P was previously reviewed and accepted by the NRC as
documented in a letter from E.G. Tourigny (NRC) to L.W. Eury (CP&L),
``SAFER/GESTR-LOCA Analysis, Brunswick Steam Electric Plant, Units 1
and 2 (TAC Nos. 72854/72855),'' dated 06/01/89 and a letter from E.G.
Tourigny (NRC) to L.W. Eury (CP&L), ``Revision of SAFER/GESTR-LOCA
Analysis--Brunswick Steam Electric Plant, Units 1 and 2 (TAC Nos. 77585
and 77586),'' dated 01/10/91. As a result, this change does not involve
a significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-324,
Brunswick Steam Electric Plant, Units 1 and 2, Brunswick County, North
Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: This change will raise the
minimum pressure at which the automatic depressurization system (ADS)
is required to be OPERABLE to 150 psig.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
This change will raise the minimum pressure at which ADS is
required to be OPERABLE to 150 psig. The OPERABILITY of the ADS valves
below 150 psig is not assumed in the initiation of any analyzed event.
The ADS is assumed in the mitigation of consequences of a LOCA [loss-
of-coolant accident] which occurs at high reactor pressure. The ADS is
not assumed in the mitigation of low reactor pressure events since its
function is to lower the pressure to within the capabilities of the low
pressure makeup systems. Low pressure injection systems are analyzed
(per NEDC-31624P, ``Brunswick Steam Electric Plant Units
[[Page 6974]]
1 and 2 SAFER/GESTR-LOCA Loss-of-Coolant Accident Analysis,'' Revision
2, July 1990) to begin injection into the RPV [reactor pressure vessel]
at pressures well above 150 psig. As a result, the proposed change does
not impact the ability of the ECCS [emergency core cooling system] to
perform [its] intended safety function and the change does not involve
a significant increase in the probability or consequences of an
accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not involve physical modification to the
plant and the proposed change continues to provide assurance that the
ADS can perform its safety function when required. Therefore, the
proposed change does not create the possibility of a new or different
kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The purpose of the ADS is to lower reactor pressure sufficiently to
allow low pressure ECCS to inject and cool the core in the event of a
HPCI [high-pressure coolant injection] System failure. Revising the
minimum pressure for required ADS valve OPERABILITY is acceptable since
the low pressure ECCS can provide core cooling at reactor pressures
well above 150 psig and since the HPCI System is not required to be
OPERABLE below 150 psig. As a result, the change does not involve a
significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-324,
Brunswick Steam Electric Plant, Units 1 and 2, Brunswick County, North
Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change relaxes the
low pressure emergency core cooling system (ECCS) pump flow acceptance
criteria under operational conditions 1 (power operation), 2 (startup),
and 3 (hot shutdown).
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change relaxes the low pressure ECCS pump flow
acceptance criteria. Low pressure ECCS equipment is used to mitigate
the consequences of an accident, but is not considered as the initiator
of any previously analyzed accident. As such, the change does not
increase the probability of any accident previously evaluated. The
proposed low pressure ECCS pump flow acceptance criteria are assumed in
the analysis summarized in NEDC-31624P [``Brunswick Steam Electric
Plant Units 1 and 2 SAFR/GESTR-LOCA Loss-of-Coolant Accident
Analysis,'' Revision 2, July 1990] which utilizes an NRC approved
methodology for determining consequences. The resulting peak cladding
temperature for all the cases analyzed in NEDC-31624P is below 1600
deg.F (a significant margin to the 10 CFR 50.46 limit). As a result,
the ECCS subsystems assumed to be available during events analyzed will
continue to provide adequate core cooling. Therefore, the change does
not involve a significant increase in the consequences of any accident
previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not introduce a new mode of plant
operation and does not involve physical modification to the plant. In
addition, the low pressure ECCS flow rates will not be determined in a
new or different way. Therefore, it does not create the possibility of
a new or different kind of accident from any accident previously
evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed low pressure ECCS pump flow acceptance criteria are
assumed in the analysis summarized in NEDC-31624P which utilizes an NRC
approved methodology. NEDC-31624P concludes that the ECCS subsystems
can still provide adequate core cooling with the proposed pump flow
acceptance criteria and in all cases analyzed peak cladding temperature
is maintained below 1600 deg.F. In addition, plant procedures will
continue to trend the performance of the low pressure ECCS pumps and
ensure that any adverse trends in equipment performance are identified
and appropriate actions taken. Therefore, the change does not involve a
significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change relaxes the
core spray (CS) pump flow acceptance criterion during shutdown
conditions.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change relaxes the CS pump flow acceptance criterion.
Low pressure ECCS [emergency core cooling
[[Page 6975]]
system] equipment is used to mitigate the consequences of a reactor
vessel draindown event during shutdown conditions, but is not
considered as the initiator of any previously analyzed accident. As
such, the change does not increase the probability of any accident
previously evaluated. The proposed low pressure ECCS pump flow
acceptance criteria are assumed in the analysis summarized in NEDC-
31624P [``Brunswick Steam Electric Plant Units 1 and 2 SAFR/GESTR-LOCA
Loss-of-Coolant Accident Analysis,'' Revision 2, July 1990] which
utilizes an NRC approved methodology for determining consequences. The
resulting peak cladding temperature for all the cases analyzed in NEDC-
31624P is below 1600 deg.F (a significant margin to the 10 CFR 50.46
limit). This analysis assumes the reactor was operating at high power.
This analysis did not invalidate the long term cooling analysis
described in NEDO-20566A [``General Electric Company Analytical Model
for Loss of Coolant Analysis in accordance with 10 CFR 50 Appendix
K'']. Therefore, since the CS pump flow proposed by this change is
adequate for high power conditions, it is reasonable to assume the CS
pump flow is adequate to restore and maintain adequate vessel level
during an inadvertent vessel draindown event while shutdown. The
required low pressure ECCS subsystems during events analyzed in
shutdown conditions will continue to provide adequate redundancy and
coolant makeup capability. Therefore, the change does not involve a
significant increase in the consequences of any accident previously
evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not introduce a new mode of plant
operation and does not involve physical modification to the plant. In
addition, the CS pump flow rate will not be determined in a new or
different way. Therefore, it does not create the possibility of a new
or different kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed CS pump flow acceptance criterion is assumed in the
analysis summarized in NEDC-31624P which utilizes an NRC approved
methodology. NEDC-31624P concludes that the ECCS subsystems can still
provide adequate core cooling with the proposed CS pump flow acceptance
criterion and in all cases analyzed peak cladding temperature is
maintained below 1600 deg.F. Since the analysis assumed high power
conditions, it is reasonable to assume that, with the proposed change,
adequate coolant makeup capability is maintained during shutdown
conditions. In addition, plant procedures will continue to trend the
performance of the low pressure ECCS pumps and ensure that any adverse
trends in equipment performance are identified and appropriate actions
taken. Therefore, the change does not involve a significant reduction
in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: This proposed change eliminates
current Technical Specification (CTS) 3/4.6.1.5, Primary Containment
Internal Pressure.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
This proposed change eliminates CTS 3/4.6.1.5, Primary Containment
Internal Pressure. This change does not result in any hardware or
operating procedure changes. The primary containment pressure is not
assumed to be an initiator of any analyzed event. It is an initial
condition in the containment analysis (e.g., following a DBA LOCA
[design-basis accident loss-of-coolant accident]). CTS 3/4.6.1.5 was
necessary to maintain this assumption which helps ensure that the
primary containment design pressure is not exceeded following an
accident. However, the power uprate analysis modified this initial
drywell pressure value such that the assumed value is greater than the
RPS [reactor protection system] high drywell trip. The results of the
power uprate analysis show that this modified initial drywell pressure
is acceptable for ensuring primary containment pressure design limits
are not exceeded. This modified initial pressure was utilized in
determining a new Pa [calculated peak containment internal
pressure related to the design basis accident], and has been submitted
to the NRC to support the BNP [Brunswick Nuclear Plant] power uprate
amendment.
The initial drywell pressure assumption is being ensured by the RPS
high drywell pressure scram, which will trip the unit prior to
exceeding the assumed drywell pressure value, effectively placing the
unit in MODE 3. While the RPS trip is not required in MODE 3, the
Emergency Operating Procedures (EOPs) will govern actions if the
drywell pressure exceeds the assumed drywell pressure value. The EOPs
will require entry into the Reactor Vessel Control and Primary
Containment Control actions. These actions require steps to reduce
primary containment pressure to below the value assumed in the accident
analyses and to cool down the reactor at normal cooldown rates to MODE
4 if pressure cannot be reduced below the reactor trip setpoint. The
negative pressure limit is controlled and met by the design and proper
operation of the reactor building-to-suppression chamber and the
suppression chamber-to-drywell vacuum breakers. These vacuum breakers,
which are required to be OPERABLE in MODES 1, 2, and 3, are designed to
ensure the negative pressure design limit of the primary containment is
not exceeded. Therefore, this change will not involve a significant
increase in the probability or consequences of an accident previously
evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not introduce a new mode of plant
operation and does not require physical modification to the plant.
Therefore, the change does not create the possibility of a new or
different kind of accident from any accident previously evaluated.
[[Page 6976]]
3. Does this change involve a significant reduction in a margin of
safety?
No significant reduction in a margin of safety is involved. The
upper pressure limit is maintained by the design and proper operation
of the RPS high drywell pressure trip, a Technical Specification
required instrumentation function, and the EOPs. The negative pressure
limit is being maintained by the design and proper operation of the
reactor building-to-suppression chamber and suppression chamber-to-
drywell vacuum breakers, also Technical Specification required
components. Therefore, adequate controls exist with respect to the
primary containment pressure limits to ensure the primary containment
pressure will not be exceeded in the event of a design basis event.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-324,
Brunswick Steam Electric Plant, Units 1 and 2, Brunswick County, North
Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change relocates
requirements and surveillances for the Containment Air Dilution (CAD)
system from the Technical Specifications to a licensee controlled
document. Licensee analysis has demonstrated that the CAD system is not
needed to maintain the primary containment atmosphere below
flammability limits.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change relocates requirements and surveillances for
structures, systems, components or variables that do not meet the
criteria for inclusion in Technical Specifications as identified in the
Application of Selection Criteria to the BNP [Brunswick Nuclear Plant]
Technical Specifications. The affected structures, systems, components
or variables are not assumed to be initiators of analyzed events and
are not assumed to mitigate accident or transient events. The
requirements and surveillances for these affected structures, systems,
components or variables will be relocated from the Technical
Specifications to an appropriate administratively controlled document
which will be maintained pursuant to 10 CFR 50.59. In addition, the
affected structures, systems, components or variables are addressed in
existing surveillance procedures which are also controlled by 10 CFR
50.59 and subject to the change control provisions imposed by plant
administrative procedures, which endorse applicable regulations and
standards. Therefore, this change does not involve a significant
increase in the probability or consequences of an accident previously
evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not involve a physical alteration of the
plant (no new or different type of equipment will be installed) or a
change in the methods governing normal plant operation. The proposed
change will not impose or eliminate any requirements and adequate
control of existing requirements will be maintained. Thus, this change
does not create the possibility of a new or different kind of accident
from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed change will not reduce a margin of safety because it
has no impact on any safety analysis assumptions. In addition, the
relocated requirements and surveillances for the affected structure,
system, component or variable remain the same as the existing Technical
Specifications. Since any future changes to these requirements or the
surveillance procedures will be evaluated per the requirements of 10
CFR 50.59, no reduction in a margin of safety will be permitted.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change applies to
the Brunswick Steam Electric Plant (BSEP), Units 1 and 2, and provides
longer out-of-service times for various combinations of inoperable
service water (SW) pumps and deletes various limitations of which pumps
can be inoperable.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change provides longer out-of-service times for
various combinations of inoperable SW pumps and deletes various
limitations of which pumps can be inoperable (e.g., a remaining unit
specific NSW [nuclear service water] pump must be electrically
separated from the remaining CSW [conventional service water] pump).
The SW System supports safety related systems used to mitigate the
consequences of an accident, but the inoperability of the SW System is
not considered as the initiator of any previously analyzed accident. As
such, the inoperability of SW pumps will not increase the probability
of any accident previously evaluated. The proposed
[[Page 6977]]
combinations of inoperable SW pumps are bounded by the analyses
summarized in CP&L calculations PCN GOO50A-10 [``BSEP Unit No. 1
Service Water System Hydraulic Analysis,'' Revision 6, dated July 29,
1993] and PCN GOO50A-12 [``BSEP Unit No. 2 Service Water System
Hydraulic Analysis,'' Revision 5, dated August 11, 1992] which have
been previously evaluated by the NRC. These analyses demonstrate that
adequate SW cooling capability would still be provided with the
proposed changes. Therefore, the consequences of an event occurring
during the proposed allowed outage times are the same as the
consequences of an event occurring during the current allowed outage
time period or the current period allowed to place the plant in a
shutdown condition. As a result, the change does not involve a
significant increase in the consequences of any accident previously
evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not involve physical modification to the
plant or changes in parameters governing normal plant operation. The
proposed change continues to provide assurance that the SW System is
capable of performing its required support function. Therefore, the
change does not create the possibility of a new or different kind of
accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed combinations of inoperable SW pumps are bounded by the
analyses summarized in CP&L calculations PCN GOO50A-10 and PCN GOO50A-
12 which have been previously evaluated by the NRC. These analyses
demonstrate that adequate SW cooling capability would still be provided
with the proposed change. In addition, the proposed allowable outage
times and the capability of the SW System to support additional single
failures are consistent with the allowable outage times and capability
of other safety related systems with similar levels of degradation. Any
reduction in the margin of safety is offset by the benefit of reducing
the transient risk associated with an unnecessary plant shutdown.
Therefore, the change does not involve a significant reduction in a
margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-324,
Brunswick Steam Electric Plant, Units 1 and 2, Brunswick County, North
Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change allows the
extension of the Allowed Outage Time (AOT) from 24 hours to 7 days of a
shutdown unit's 4.16 kilovolt (kV) balance of plant (BOP) bus which is
needed to support loads required by the operating unit.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
Extending AOT of a shutdown unit's BOP bus from 24 hours to 7 days
will not increase the probability of occurrence of an accident on the
operating unit. The probability of a previously evaluated accident
would not be increased by the longer AOT since de-energization of a
single BOP bus is not considered in the initiation of any previously
analyzed event. The BOP buses support the distribution of offsite power
to the Class 1E AC Electrical Power Distribution System, which supports
equipment necessary for the mitigation of accidents. Extending the AOT
of a shutdown unit's BOP bus will not significantly increase the
consequences of an accident on the operating unit. The consequences of
an accident occurring during the proposed 7 day AOT would be the same
as the consequences associated with the existing 24 hour AOT.
Therefore, this change will not involve a significant increase in the
probability or consequences of an accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not introduce a new mode of plant
operation and does not involve a physical modification to the plant.
Therefore, it does not create the possibility of a new or different
kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The margin of safety is defined by the scenario where a LOCA [loss-
of-coolant accident] occurs on the operating unit concurrent with loss
of offsite power and the worst case single failure (e.g., loss of a DG
[diesel generator] and associated supported loads). The intentional de-
energization of one of the AC Electrical Power Distribution System load
groups primarily associated with the shutdown unit, as a result of de-
energization of a BOP bus associated with the shutdown unit, will leave
three AC Electrical Power Distribution System load groups OPERABLE each
with their associated emergency diesel generator and two sources of
offsite power OPERABLE. Two of these AC Electrical Power Distribution
System load groups will be associated with the operating unit and one
with the shutdown unit. Loss of an AC Electrical Power Distribution
System load group primarily associated with the shutdown unit is not as
limiting to the operating unit as the loss of one of its emergency
power system load groups; there are fewer operating unit loads required
for mitigation of accident and transients affected by the removal of an
AC Electrical Power Distribution System load group primarily associated
with the shutdown unit. The intentional de-energization of an AC
Electrical Power Distribution System load group primarily associated
with the shutdown unit, as a result of de-energization of a BOP bus, is
enveloped by the LOCA scenario described above.
There are a number of operating unit loads required for mitigation
of accidents and transients which will become inoperable when an AC
Electrical Power Distribution System load group primarily associated
with the shutdown unit is removed from service as a result of de-
energization of the associated BOP bus. A review of the loads supported
by each of the load groups indicates that operating unit loads required
for mitigation of accidents and transients can either be
[[Page 6978]]
supplied from an alternate source or the Technical Specifications would
allow an AOT of 7 days or greater for the affected loads. Changing the
AOT from 24 hours to 7 days for an inoperable BOP bus associated with
the shutdown unit would not exceed the AOT for these individual loads.
In addition, operating unit primary containment isolation valves
supplied from the shutdown unit's out of service load group (RHR
[residual heat removal] Outboard Injection, RHR Inboard Injection, and
RHR Torus Spray) would be closed, in accordance with the Technical
Specification requirements of the operating unit, to ensure they
perform their safety function if needed. The proposed AOT for an
inoperable BOP bus associated with [the] shutdown unit provides the
benefit of improved reliability and availability of the AC Electrical
Power Distribution System and the associated offsite power circuits
(via upstream BOP buses) since the longer AOT will allow maintenance of
the buses of these load groups to be performed on a more optimum
schedule. As a result, the proposed change does not involve a
significant decrease in the margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-324,
Brunswick Steam Electric Plant, Units 1 and 2, Brunswick County, North
Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change allows
extension of the Allowed Outage Time (AOT) from 8 hours to 7 days of
one of the shutdown unit's emergency load groups which is needed to
support loads required by the operating unit.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
Extending the Allowed Outage Time (AOT) of an AC Electrical Power
Distribution System load group primarily associated with a shutdown
unit from 8 hours to 7 days will not increase the probability of
occurrence of an accident on the operating unit. The probability of a
previously evaluated accident would not be increased by the longer AOT
since de-energization of a single load group is not considered in the
initiation of any previously analyzed event. The Class 1E AC Electrical
Power Distribution System supports equipment necessary for the
mitigation of accidents. Extending the AOT of an AC Electrical Power
Distribution System load group primarily associated with a shutdown
unit will not significantly increase the consequences of an accident on
the operating unit. The consequences of an accident occurring during
the proposed 7 day AOT would be the same as the consequences associated
with the existing 8 hour AOT. Therefore, this change will not involve a
significant increase in the probability or consequences of an accident
previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not introduce a new mode of plant
operation and does not involve a physical modification to the plant.
Therefore, it does not create the possibility of a new or different
kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The margin of safety is defined by the scenario where a LOCA [loss-
of-coolant] occurs on the operating unit concurrent with loss of
offsite power and the worst case single failure (e.g., loss of a DG
[diesel generator] and associated supported loads). The intentional de-
energization of one of the AC Electrical Power Distribution System load
groups primarily associated with the shutdown unit will leave three AC
Electrical Power Distribution System load groups OPERABLE each with
their associated emergency diesel generator and two sources of offsite
power OPERABLE. Two of these AC Electrical Power Distribution System
load groups will be associated with the operating unit and one with the
shutdown unit. Loss of an AC Electrical Power Distribution System load
group primarily associated with the shutdown unit is not as limiting to
the operating unit as the loss of one of its emergency power system
load groups; there are fewer operating unit loads required for
mitigation of accident and transients affected by the removal of an AC
Electrical Power Distribution System load group primarily associated
with the shutdown unit. The intentional de-energization of an AC
Electrical Power Distribution System load group primarily associated
with the shutdown unit is enveloped by the LOCA scenario described
above.
There are a number of operating unit loads required for mitigation
of accidents and transients which will become inoperable when an AC
Electrical Power Distribution System load group primarily associated
with the shutdown unit is removed from service. A review of the loads
supported by each of the load groups indicates that operating unit
loads required for mitigation of accidents and transients can either be
supplied from an alternate source or the Technical Specifications would
allow an AOT of 7 days or greater for the affected loads. Changing the
AOT from 8 hours to 7 days for an inoperable AC Electrical Power
Distribution System load group primarily associated with a shutdown
unit would not exceed the AOT for these individual loads. In addition,
operating unit primary containment isolation valves supplied from the
shutdown unit's out of service load group (RHR [residual heat removal]
Outboard Injection, RHR Inboard Injection, and RHR Torus Spray) would
be closed, in accordance with the Technical Specification requirements
of the operating unit, to ensure they perform their safety function if
needed. The proposed AOT for an inoperable AC Electrical Power
Distribution System load group provides the benefit of improved
reliability and availability of the AC Electrical Power Distribution
System since the longer AOT will allow maintenance of the buses of
these load groups to be performed on a more optimum schedule. As a
result, the proposed change does not involve a significant decrease in
the margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
[[Page 6979]]
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change allows
reactor coolant system (RCS) hydrostatic pressure and leakage testing
to be performed with average reactor coolant temperature in excess of
212 deg.F and not consider the plant to be in MODE 3 (hot shutdown)
provided certain conditions are met.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated? The
proposed change allows RCS hydrostatic pressure and leakage testing to
be performed with average reactor coolant temperature in excess of
212 deg.F and not consider the plant to be in MODE 3 provided certain
conditions are met. The probability of a leak or a pipe break in the
reactor coolant pressure boundary during inservice leak and hydrostatic
testing is not increased by allowing reactor coolant temperature to
exceed 212 deg.F because the Reactor Coolant System is designed for
temperatures exceeding 500 deg.F with similar pressures. In addition,
because an inspection is being performed on the Reactor Coolant System
piping while it is being pressurized, the probability of a crack going
unnoticed and resulting in a pipe break is reduced. Reactor vessel
integrity will not be compromised by performing hydrostatic pressure
and leakage testing at temperatures in excess of 212 deg.F. Performing
hydrostatic pressure and leakage testing above 212 deg.F would allow
steam, rather than water to emit from a leak or pipe break. The
hydrostatic or inservice leak test is performed with a water solid
reactor pressure vessel. An engineering analysis was performed to
determine the reactor building pressure and temperature effects if a
pipe break occurred during the hydrostatic pressure and inservice leak
testing at a reactor coolant temperature of 275 deg.F. A recirculation
line break was used in the analysis since it was considered the most
conservative pipe break with primary containment breached during the
test. This analysis has concluded that the recirculation line break
during the performance of the test could result in a rise in reactor
building pressure sufficient to cause the opening of the reactor
building blowout panel and result in a breach of secondary containment.
Furthermore, this analysis has shown without credit for HVAC [heating,
ventilation, and air conditioning] operation, there would also be a
short term increase in the reactor building ambient temperature.
However, when compared to the UFSAR [Updated Final Safety Analysis
Report] LOCA [loss-of-coolant accident] analysis and the UFSAR main
steam line break analysis, it can be concluded that the consequences
relative to offsite doses, reactor building pressures and temperatures
are bounded by previously analyzed accidents. This change will require
that secondary containment be OPERABLE and capable of handling airborne
radioactivity from steam leaks that could occur during the performance
of hydrostatic pressure or inservice leak testing. Requiring secondary
containment to be OPERABLE will conservatively ensure that, in the
absence of a pipe break, potential airborne radiation from steam leaks
will be filtered through the Standby Gas Treatment System, thereby
minimizing radiation releases to the environment. Leaks to secondary
containment would typically be detected by leakage inspections before
significant inventory loss occurred. This is an integral part of the
hydrostatic pressure and inservice leak testing program. In addition,
there is no mechanism to impart additional fission products into the
reactor coolant. Since the hydrostatic pressure test is performed after
refueling, few noncondensible gases remain in the reactor coolant. In
the proposed condition, the stored energy in the reactor core will be
the same as that at 212 deg.F. This stored energy is sufficiently low
such that even with the loss of inventory following a recirculation
line break, the core coverage could be maintained and the fuel would
not exceed its peak clad temperature limit. Therefore, no significant
release of fission products would occur. Therefore, this change will
not involve a significant increase in the probability or consequences
of an accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not involve any physical changes to plant
structures, systems, or components (no new or different type of
equipment will be installed and no equipment will be removed). The
change will not alter assumptions made in the safety analyses.
Therefore, the change will not create the possibility of a new or
different kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed change allows RCS hydrostatic pressure and leakage
testing to be performed with average reactor coolant temperature in
excess of 212 deg. F and not consider the plant to be in MODE 3
provided certain conditions are met. Secondary containment will be
required to be maintained during the test and all required systems with
the reactor in MODE 4 [cold shutdown] will be OPERABLE in accordance
with the Technical Specifications. Since the hydrostatic or leak tests
are performed water solid, at low decay heat values, and near MODE 4
conditions, the stored energy in the reactor core will be very low.
Under these conditions, the potential for failed fuel and a subsequent
increase in coolant activity is minimized. The reactor pressure vessel
would rapidly depressurize in the event of a large primary system leak
and the low pressure injection systems normally OPERABLE in MODE 4
would be adequate to keep the core flooded. This would ensure that the
fuel would not be uncovered and would not exceed the 2200 deg. F peak
clad temperature limit. Moreover, requiring secondary containment,
including isolation capability, to be OPERABLE will assure that
potential airborne radiation from small leaks can be filtered through
the Standby Gas Treatment System. This will ensure that doses remain
within the limits of 10 CFR 100 guidelines. The potential doses from
any leak or pipe break during the test are bounded by design basis
accident doses presented in the UFSAR. Small system leaks would be
detected by inspections before significant inventory loss has occurred.
In addition, the change provides the benefit of avoiding
depressurization and repressurization of the reactor pressure vessel
during system hydrostatic or
[[Page 6980]]
leakage pressure tests because of the lack of sufficient margin to the
MODE 4/MODE 3 reactor coolant temperature transition limit. Therefore,
the proposed change does not involve a significant reduction in a
margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change adds explicit
exceptions to 10 CFR 50 Appendix J in the primary containment leakage
testing program which were previously approved by the Nuclear
Regulatory Commission for the Brunswick Steam Electric Plant Units 1
and 2.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change involves reformatting, renumbering, and
rewording the existing Technical Specifications. The reformatting,
renumbering, and rewording process involves no technical changes to the
existing Technical Specifications. As such, this change is
administrative in nature and does not impact initiators of analyzed
events or assumed mitigation of accident or transient events.
Therefore, this change does not involve a significant increase in the
probability or consequences of an accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not involve a physical alteration of the
plant (no new or different type of equipment will be installed) or
changes in methods governing normal plant operation. The proposed
change will not impose any new or eliminate any old requirements. Thus,
this change does not create the possibility of a new or different kind
of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed change will not reduce a margin of safety because it
has no impact on any safety analyses assumptions. This change is
administrative in nature. Therefore, the change does not involve a
significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-
324, Brunswick Steam Electric Plant, Units 1 and 2, Brunswick
County, North Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: The proposed change would change
the requirement of the Rod Block Monitor (RBM) to be Operable when
Thermal Power is greater than or equal to 29% of Rated Thermal Power
and less than 90% of the Rated Thermal Power with the minimum critical
power ratio (MCPR) less than 1.70.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change provides more stringent requirements for
operation of the facility. These more stringent requirements do not
result in operation that will increase the probability of initiating an
analyzed event and do not alter assumptions relative to mitigation of
an accident or transient event. The more restrictive requirements
continue to ensure process variables, structures, systems, and
components are maintained consistent with the safety analyses and
licensing basis. Therefore, this change does not involve a significant
increase in the probability or consequences of an accident previously
evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change does not involve a physical alteration of the
plant (no new or different type of equipment will be installed) or
changes in the methods governing normal plant operation. The proposed
change does impose different requirements. However, these changes are
consistent with the assumptions in the safety analyses and licensing
basis. Thus, this change does not create the possibility of a new or
different kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The imposition of more restrictive requirements either has no
impact on or increases the margin of plant safety. As provided in the
discussion of the change, each change in this category is by
definition, providing additional restrictions to enhance plant safety.
The change maintains requirements within the safety analyses and
licensing basis. Therefore, this change does not involve a significant
reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
[[Page 6981]]
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket Nos. 50-325 and 50-324,
Brunswick Steam Electric Plant, Units 1 and 2, Brunswick County, North
Carolina
Date of amendment request: November 1, 1996.
Description of amendment request: A Rod Worth Minimizer (RWM)
CHANNEL FUNCTIONAL TEST is currently required to be performed during
both a shutdown and a startup. The amendment request would modify the
test frequency to require that the CHANNEL FUNCTIONAL TEST only be
performed once provided the last test performance occurred within a 92-
day period.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
CTS [Current Technical Specification] 4.1.4.1.1 requires a CHANNEL
FUNCTIONAL TEST to be performed prior to withdrawal of control rods for
the purpose of making the reactor critical and when the RWM is
initiated during a plant shutdown. ITS [Improved TS] Surveillance
Requirements are similar to CTS 4.1.4.1.1 except a test Frequency is
specified (92 days). The proposed change effectively extends a[n] RWM
Surveillance Frequency, i.e., the CHANNEL FUNCTIONAL TEST is not
required to be performed if a startup or shutdown occurs within 92 days
of a previous startup or shutdown. The RWM and associated Surveillance
Requirements are not assumed as initiators of any previously analyzed
accidents. In addition, operating history has shown that the RWM would
be continually reliable during the extended Surveillance interval. The
consequences of an accident are not affected by relaxing the Frequency
of the Surveillance since the consequences of a design basis accident
with the RWM inoperable during a reactor startup or shutdown (due to an
undetected failure) are the same as the consequences of a design basis
accident with the RWM inoperable for the proposed 92 day period.
Additionally, the most common outcome of the performance of a
Surveillance is the successful demonstration that the acceptance
criteria are satisfied. This change does not alter assumptions relative
to the mitigation of an accident or transient event. Therefore, this
change does not significantly increase the probability or consequences
of a previously analyzed accident.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The change introduces no new mode of plant operation and it does
not involve physical modification to the plant. Therefore, it does not
create the possibility of a new or different kind of accident from any
accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed change to the Frequency is acceptable since the ITS
Surveillance Frequency is adequate for ensuring the RWM is maintained
OPERABLE.
Operating history has shown that the RWM would be continually
reliable during the extended Surveillance interval. The most common
outcome of the performance of a Surveillance is the successful
demonstration that the acceptance criteria are satisfied. Also, the
proposed change provides a benefit of eliminating unnecessary testing
prior to startup and during a shutdown which reduces wear on the
instruments, thereby increasing overall reliability. As such, this
change does not involve a significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: University of North Carolina
at Wilmington, William Madison Randall Library, 601 S. College Road,
Wilmington, North Carolina 28403-3297.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Carolina Power & Light Company, et al., Docket No. 50-400, Shearon
Harris Nuclear Power Plant, Unit 1, Wake and Chatham Counties, North
Carolina
Date of amendment request: December 16, 1997.
Description of amendment request: The amendment request proposes to
revise the Technical Specifications for the Shearon Harris Nuclear
Plant. Specifically, the amendment request proposes revisions to TS
4.7.1.2.1.a.2.a, Auxiliary Feedwater System Surveillance Requirements,
to change the differential pressure and flow requirements of the steam
turbine-driven Auxiliary Feedwater (AFW) pump to allow testing of the
pump at a lower speed than is currently performed.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed amendment does not involve a significant increase
in the probability or consequences of an accident previously evaluated.
Changing the recirculation flow test parameters at which the
turbine-driven AFW pump is tested will demonstrate pump operability
while allowing the surveillance to be performed at a speed that is less
detrimental to the pump. Appropriate testing will continue to ensure
that the Auxiliary Feedwater System (AFS) is capable of performing its
intended function. The proposed amendment will not introduce any new
equipment or require existing equipment to function different from that
previously evaluated in the Final Safety Analysis Report (FSAR) or TS.
Therefore, the proposed change does not involve a significant increase
in the probability or consequences of an accident previously evaluated.
2. The proposed amendment does not create the possibility of a new
or different kind of accident from any accident previously evaluated.
Changing the recirculation flow test parameters at which the
turbine-driven AFW pump is tested will demonstrate pump operability
while allowing the surveillance to be performed at a speed that is less
detrimental to the pump. Appropriate testing will continue to ensure
that the AFS is capable of performing its intended function. The
proposed amendment will not introduce any new equipment or require
existing equipment to function different from that previously evaluated
in the Final Safety Analysis Report (FSAR) or TS.
[[Page 6982]]
The proposed amendment will not create any new accident scenarios,
because the change does not introduce any new single failures, adverse
equipment or material interactions, or release paths. Therefore, the
proposed change does not create the possibility of a new or different
kind of accident from any accident previously evaluated.
3. The proposed amendment does not involve a significant reduction
in the margin of safety.
Changing the recirculation flow test parameters at which the
turbine-driven AFW pump is tested will demonstrate pump operability
while allowing the surveillance to be performed at a speed that is less
detrimental to the pump. Appropriate testing will continue to ensure
that the AFS is capable of performing its intended function. Therefore,
the proposed change does not involve a significant reduction in the
margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Cameron Village Regional
Library, 1930 Clark Avenue, Raleigh, North Carolina 27605.
Attorney for licensee: William D. Johnson, Vice President and
Senior Counsel, Carolina Power & Light Company, Post Office Box 1551,
Raleigh, North Carolina 27602.
NRC Project Director: William M. Dean.
Commonwealth Edison Company, Docket Nos. 50-373 and 50-374, LaSalle
County Station, Units 1 and 2, LaSalle County, Illinois
Date of amendment request: December 12, 1997.
Description of amendment request: The proposed amendments would
modify the bypass logic for Main Steam Line Isolation Valve Isolation
Actuation Instrumentation on Condenser Low Vacuum as stated in
Technical Specification (TS) Tables 3.3.2-1 and 4.3.2.1-1.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
(1) Involve a significant increase in the probability or
consequences of an accident previously evaluated because:
The reactor vessel steam dome pressure switches, which are proposed
to be removed from the Main Steam Isolation Valve (MSIV) closure scram
bypass logic and the Condenser Vacuum--Low MSLIV [main steam line
isolation valve] isolation bypass logic cause the above trip functions
to become active when the reactor mode switch is not in the RUN
position and the reactor pressure is greater than 1043 psig. The
setpoints of the reactor vessel steam dome pressure switches are the
same as the reactor vessel steam dome pressure--high scram function.
Also, any pressure transients as a result of MSIV closure when not in
Operational Condition 1, Run mode, are minor due to low steam flow
compared to the same event at rated power. Therefore, the reactor
pressure switches being removed from the bypass logic of the MSIV
closure scram has little or no affect on reactor startup, operation,
shutdown, or analyzed accidents.
The condenser vacuum--low isolation function bypass is interlocked
by the same pressure switches that bypass the MSIV closure scram when
the reactor mode switch is not in the RUN position. In addition to
reactor pressure not high, the bypass of the condenser vacuum--low is
bypassed only if the reactor mode switch is not in the RUN position,
all Turbine Stop Valves (TSVs) are not full open, and the keylock
bypass switches are in BYPASS (one for each channel).
With the reactor pressure interlock removed, the remaining
interlocks assure that the condenser will not be overpressurized in
Operational Conditions 2 and 3. The Reactor mode switch interlock
limits reactor thermal power to less than about 12 percent in
Operational Condition 2 (Control Rod withdrawal block on APRM [average
power range monitor] High setpoint in Operational Conditions 2 and 5)
and to much less than 1 percent power when all control rods are fully
inserted in Operational Condition 3 after initial thermal power decay
due to decay heat following reactor shutdown. The Turbine bypass valves
can not be opened with condenser vacuum low (approximately the same as
the isolation setpoint, but different instrumentation). The TSVs remain
closed with condenser vacuum low due to a turbine trip on low condenser
vacuum. Therefore, the remaining bypass interlocks assure that the
isolation of the main steam lines will occur when needed to prevent
overpressurization of the main condenser when vacuum is low or gone.
The change to the position information in the TS Table notes for
the TSV bypass interlock corrects misinformation in the TS. The design
has always used contacts from the auxiliary relays associated with the
``not-full-open'' limit switches for the MSIV closure scram. Therefore,
the setpoints are the same as the MSIV closure scram in TS 2.2.1. The
setpoint in the notes * are made approximate to avoid conflict with the
RPS [reactor protection system] setpoints, which are controlling. Also,
[sic] surveillances for the RPS function for TSV closure scram will
continue to be performed per TS 4.3.1 at the frequencies specified in
TS Table 4.3.1.1-1.
The setpoint for the TSV interlock is not a critical parameter for
the isolation bypass interlock, since the normal position of the TSVs
with low condenser vacuum is fully closed. Therefore, the use of an
approximate value is sufficient, since the actual setpoints and
surveillances are controlled by other specifications.
The reactor pressure switches being removed from the above bypass
circuits are not used for the mitigation of any analyzed accidents or
transients and may actually [decrease] the probability of a scram or
isolation in Startup mode due to the potential for misoperation. Also,
the correction to the TSV position in the bypass notes is more
consistent with the actual setpoints, which are controlled by the
Limiting Safety System Settings for RPS trip function due to TSV
closure.
The rewording of Note * in TS Table 4.3.2.1-1 to be more like Note
* in TS Table 3.3.2-1 helps avoid confusion due to wording differences
and is an administrative type change.
Therefore, there is no significant increase in the probability or
consequences of an accident previously evaluated.
(2) Create the possibility of a new or different kind of accident
from any accident previously evaluated because:
The removal of the reactor pressure switches from the bypass logic
for the MSIV closure scram function and the condenser vacuum--low MSLIV
isolation function with a setpoint equal to the reactor pressure scram
setpoint is not a significant change and does not alter the reactor
modes in which the trips are or can be bypassed. When not in RUN mode,
energy levels are low compared to events that could occur at rated
power levels. These pressure switches only slightly change the bypass
logic and do not affect the scram and isolation circuitry such that a
new or different kind of accident would occur.
The correction of the TSV position interlock for the bypass
function for the condenser vacuum--low MSLIV isolation is not a
physical change to the
[[Page 6983]]
plant, so no failure modes are affected or created.
The rewording of Note * in TS Table 4.3.2.1-1 to be more like Note
* in TS Table 3.3.2-1 helps avoid confusion due to wording differences
and is an administrative type change.
Therefore, the possibility of a new or different kind of accident
is not created.
(3) Involve a significant reduction in the margin of safety
because:
The removal of the rector pressure switches from the bypass logic
of the MSIV closure scram function and the bypass logic from the
condenser vacuum--low MSLIV isolation function does not reduce the
margin of safety, because the setpoints were not established from
analyses that have been performed. The setpoints were set at the value
of the reactor scram on high reactor pressure as a convenient setpoint
out of the way of normal plant operation, rather than initially
removing the bypass interlock.
Also, the high reactor pressure scram is required to be operable in
Operational Conditions 1, 2, and 3, and has no installed means of
bypass, so the removal of the MSIV closure scram in Operational
Conditions other than mode 1, Run mode becoming active due to high
reactor pressure does not reduce the margin for reactor pressurization
events.
The remaining bypass interlocks, associated with TSV position for
the bypass of the condenser vacuum--low MSLIV isolation, assure that
the main condenser will be protected from overpressurization events
with low condenser vacuum. The TSVs are closed due to a main turbine
trip with low condenser vacuum, so if the TSVs were to fail open, the
MSLIV will occur in Operational Conditions 2 and 3 when required. The
removal the reactor pressure bypass interlock and the correction to the
TSV position will not be a significant reduction in the margin of
safety.
The rewording of Note * in TS Table 4.3.2.1-1 to be more like Note
* in TS Table 3.3.2-1 helps avoid confusion due to wording differences
and is an administrative type change.
Therefore, the proposed changes do not involve a significant
reduction in the margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
requested amendments involve no significant hazards consideration.
Local Public Document Room location: Jacobs Memorial Library,
Illinois Valley Community College, Oglesby, Illinois 61348.
Attorney for licensee: Michael I. Miller, Esquire; Sidley and
Austin, One First National Plaza, Chicago, Illinois 60603.
NRC Project Director: Robert A. Capra.
Duke Energy Corporation, et al., Docket Nos. 50-413 and 50-414, Catawba
Nuclear Station, Units 1 and 2, York County, South Carolina
Date of amendment request: December 11, 1997.
Description of amendment request: The licensee proposed to revise
Table 3.3-4 of the units' Technical Specifications, changing the
Nuclear Service Water System Suction Transfer (from Lake Wylie to the
Standby Nuclear Service Water Pond (SNSWP)) to a higher level of Lake
Wylie. The Nuclear Service Water System is the ultimate heat sink for
various heat loads during normal operation and design basis accidents.
The system also provides makeup water to various systems. Lake Wylie
provides the normal water supply whereas the SNSWP provides an assured
water source should Lake Wylie water becomes unavailable. The transfer
of suction is currently required to occur automatically when Lake
Wylie's levels drops to an elevation of 552.9 feet. The proposed
revision would change this requirement to a more conservative level
about 2.5 feet higher than the current level. This change would correct
previously identified nonconservative aspects of the net positive
suction head (NPSH) calculation for the Nuclear Service Water System
pumps.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration. The NRC staff has reviewed the licensee's analysis
against the standards of 10 CFR 50.92(c). The NRC staff's analysis is
presented below.
1. Will the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
No. The revised suction transfer point would increase reliability
of the Nuclear Service Water System by increasing the NPSH available to
the system. No previously analyzed accidents were initiated by transfer
of the suction source, and the transfer of suction was not a factor in
the consequences of previously analyzed accidents. Therefore, the
proposed change will have no impact on the consequences or
probabilities of any previously evaluated accidents.
2. Will the change create the possibility of a new or difference
kind of accident from any accident previously evaluated?
No. Other than requiring suction be transferred at a higher level
of Lake Wylie, the proposed change would not lead to any hardware or
operating procedure change. Hence, no new equipment failure modes or
accidents from those previously evaluated will be created.
3. Will the change involve a significant reduction in a margin of
safety?
No. Margin of safety is associated with confidence in the design
and operation of the plant. The proposed change to the Technical
Specifications does not involve any change to plant design or
operation. Thus, the margin of safety previously analyzed and evaluated
is maintained.
Based on this analysis, it appears that the three standards of 10
CFR 50.92(c) are satisfied. Therefore, the NRC staff proposes to
determine that the amendment request involves no significant hazards
consideration.
Local Public Document Room location: York County Library, 138 East
Black Street, Rock Hill, South Carolina.
Attorney for licensee: Mr. Paul R. Newton, Legal Department
(PB05E), Duke Energy Corporation, 422 South Church Street, Charlotte,
North Carolina.
NRC Project Director: Herbert N. Berkow.
Duke Energy Corporation, et al., Docket Nos. 50-413 and 50-414, Catawba
Nuclear Station, Units 1 and 2, York County, South Carolina
Date of amendment request: December 18, 1997; revised on January
26, 1998.
Description of amendment request: The licensee proposed to revise
the units' facility operating licenses (FOL) NPF-35 and NPF-52 to
delete license conditions which have been fulfilled, to update
information to reflect current plant status and regulatory
requirements, and to make other editorial corrections. All the
requested changes are administrative.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Will the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
[[Page 6984]]
No. The proposed amendment to the FOL involves administrative
changes only. No actual plant equipment, operating practices, or
accident analyses are affected by this proposed amendment. Therefore,
the proposed amendment has no impact on the possibility (sic) of any
type of accident: new, different, or previously evaluated.
2. Will the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
No. The proposed amendment to the Catawba FOL involves
administrative changes only. No actual plant equipment, operating
practices, or accident analyses are affected by this proposed amendment
and no failure modes not bounded by previously evaluated accidents are
created. Therefore, the proposed amendment has no impact on the
possibility (sic) of any type of accident: new, different, or
previously evaluated.
3. Will the change involve a significant reduction in a margin of
safety?
No. Margin of safety is associated with confidence in the ability
of the fission product barriers (i.e., fuel and fuel cladding, Reactor
Coolant System pressure boundary, and containment structure) to limit
the level of radiation dose to the public. The proposed license
amendment is administrative in nature and only updates the Catawba FOL
to eliminate outdated or completed requirements; therefore, no
reduction in any existing margin of safety is involved.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: York County Library, 138 East
Black Street, Rock Hill, South Carolina.
Attorney for licensee: Mr. Paul R. Newton, Legal Department
(PB05E), Duke Energy Corporation, 422 South Church Street, Charlotte,
North Carolina.
NRC Project Director: Herbert N. Berkow.
Entergy Operations, Inc., Docket No. 50-313, Arkansas Nuclear One,
Unit No. 1, Pope County, Arkansas
Date of amendment request: December 12, 1997, with supplement dated
August 13, 1997.
Description of amendment request: The proposed amendment
establishes an alternate repair criteria for the segment of steam
generator tubes that are located within the upper tube sheet.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does Not Involve a Significant Increase in the Probability or
Consequences of an Accident Previously Evaluated.
The steam generators are used to remove heat from the reactor
coolant system during normal operation and during accident conditions.
The steam generator tubing forms a substantial portion of the reactor
coolant pressure boundary. A steam generator tube failure is a
violation of the reactor coolant pressure boundary and is a specific
accident analyzed in the ANO-1 Safety Analysis Report.
The purpose of the periodic surveillance performed on the steam
generators in accordance with ANO-1 Technical Specification 4.18 is to
ensure that the structural integrity of this portion of the reactor
coolant system (RCS) will be maintained. The technical specification
plugging limit of 40% of the nominal tube wall thickness requires tubes
to be repaired or removed from service because the tube may become
unserviceable prior to the next inspection. Unserviceable is defined in
the TS as the condition of a tube if it leaks or contains a defect
large enough to affect its structural integrity in the event of an
operating basis earthquake, a loss-of-coolant accident, or a steam line
break.
The proposed technical specification specifies an alternate
plugging limit for upper tubesheet volumetric outer diameter
intergranular attack (ODIGA) indications. Based upon extensive testing
and plant experience, it has been determined that upper tubesheet
volumetric ODIGA flaws with a bobbin voltage indication less than that
specified by the proposed technical specification can remain in service
while maintaining the serviceability of the tube.
From testing performed on simulated flaws within the tubesheet, it
has been shown that the patch IGA indications within the upper
tubesheet, with depths up to 100% through-wall, do not represent
structurally significant flaws which would increase the probability of
a tube failure beyond that currently assumed in the ANO-1 Safety
Analysis Report. The dose consequences of a MSLB accident are analyzed
in the ANO-1 accident analysis. This analysis assumes the unit is
operating with a 1 gpm steam generator tube leak and that the unit has
been operating with 1% defective fuel. Increased leakage during a
postulated MSLB accident resulting from applying the voltage-base
repair criteria to upper tubesheet volumetric ODIGA is not expected.
ODIGA has been present in the ANO-1 steam generators for many years
with no known leakage attributed to this damage mechanism. Because of
its localized nature and morphology, the flaw does not open under
accident conditions. To further support this conclusion, hot leak
testing at the bounding MSLB temperature, pressure, and load was
performed on tubing with representative laboratory generated flaws. The
leak testing was performed on 29 samples with volumetric ODIGA with
bobbin indications of 0.04 to 1.62 volts. None of these flaws showed
signs of leakage as a result of these loads. Additionally, four
specimens created by electrodischarge machining (EDM) with depths up to
approximately 95% through-wall were tested with no leakage detected. It
was, therefore, concluded that volumetric ODIGA flaws with an eddy
current indication up to 1.62 volts will not leak under accident
conditions, and that this is an acceptable threshold value to use to
assume zero accident leakage.
This change allows volumetric ODIGA flaws within the tubesheet,
which are not projected to meet or exceed the 1.62 volt threshold when
considering eddy current uncertainty and an allowance for growth, to
remain in service. Continued operation with these flaws present does
not result in a significant increase in the probability or consequences
of an accident previously evaluated for ANO-1.
Therefore, this change does not involve a significant increase in
the probability or consequences of any accident previously evaluated.
2. Does Not Create the Possibility of a New or Different Kind of
Accident from any Previously Evaluated.
The steam generators are passive components. The intent of the
technical specification surveillance requirements are being met by this
change in that adequate structural and leakage integrity will be
maintained. Additionally, the proposed change does not introduce any
new modes of plant operation.
Therefore, this change does not create the possibility of a new or
different kind of accident from any previously evaluated.
3. Does Not Involve a Significant Reduction in the Margin of
Safety.
The margin of safety is not reduced by the implementation of the
proposed technical specification change allowing
[[Page 6985]]
volumetric ODIGA flaws within the upper tubesheet which meet the
proposed acceptance criteria to remain in service.
Testing of upper tubesheet volumetric ODIGA flaws removed from the
ANO-1 OTSGs during 1R13, showed the flawed tubes to be capable of
withstanding differential pressures of 10,000 psid without the presence
of the tubesheet. Testing of simulated through-wall flaws of up to 0.5
inch in diameter within a tubesheet showed that the tubes always failed
outside of the tubesheet. Thus the structural requirements listed in
the bases of the technical specification are satisfied considering this
change.
Tubes with volumetric ODIGA indications within the tubesheet which
satisfy the acceptance criteria specified in the proposed technical
specification change are not anticipated to leak under accident
conditions. This is due to the small size of the flaws and their
morphology. This premise has been demonstrated through years of actual
plant operation with no known leakage attributable to these flaws, even
considering a plant transient in 1996 which exposed the ``B'' steam
generator to a primary-to-secondary pressure differential of 2100 psid.
The potential for leakage under accident conditions was the focus of
testing performed on representative samples of flawed OTSG tubing.
These tests confirmed for tubesheet flaws, within the bounds of the
proposed technical specification change, that leakage is not expected
under accident conditions. With no increased accident leakage
anticipated as a result of the proposed technical specification change,
the offsite dose consequences from a MSLB accident remain unchanged
from that currently analyzed in the ANO-1 Safety Analysis Report.
Therefore, this change does not involve a significant reduction in
the margin of safety.
In conclusion, based upon the reasoning presented above and the
previous discussion of the amendment request, Entergy Operations has
determined that the requested change does not involve a significant
hazards consideration.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Tomlinson Library, Arkansas
Tech University, Russellville, AR 72801.
Attorney for licensee: Nicholas S. Reynolds, Esquire, Winston and
Strawn, 1400 L Street, N.W., Washington, DC 20005-3502.
NRC Project Director: John Hannon.
Entergy Operations Inc., Docket No. 50-382, Waterford Steam Electric
Station, Unit 3, St. Charles Parish, Louisiana
Date of amendment request: November 18, 1996, as supplemented by
letter dated January 21, 1998.
Description of amendment request: The amendment requests a change
to Technical Specification (TS) Surveillance Requirement 4.4.8.3.1.b to
test the Shutdown Cooling System suction line relief valves in
accordance with TS 4.0.5. Editorial changes to 4.4.8.3.1 and
4.4.8.3.1.a. have also been requested.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Will operation of the facility in accordance with this proposed
change involve a significant increase in the probability or
consequences of an accident previously evaluated?
No. The proposed change will not affect the assumptions, design
parameters, or results of any accident previously evaluated. The
proposed change does not add or modify any existing equipment. The
proposed change will not diminish the ability of the valves to perform
as required during an accident. The proposed Shutdown Cooling System
suction line relief valves testing schedule will be in accordance with
Section XI of the ASME.
Boiler and Pressure Vessel Code and applicable Addenda as required
by 10 CFR [Part] 50, Section 50.55a(g). This ensures the operational
readiness of the valves. Therefore, the proposed change will not
involve an increase in the probability or consequences of any accident
previously evaluated.
2. Will operation of the facility in accordance with this proposed
change create the possibility of a new or different type of accident
from any accident previously evaluated?
No. The proposed change does not involve modifications to any
existing equipment. The proposed change will not affect the operation
of the plant or the manner in which the plant is operated. No new
failure modes that have not been previously considered will be
introduced. The net effect of the change is to allow the plant staff
the option of reducing the frequency of valve testing to a level that
has been acknowledged as acceptable by the applicable ASME Code.
Therefore, the proposed change will not create the possibility of a new
or different kind of accident from any accident previously evaluated.
3. Will operation of the facility in accordance with this proposed
change involve a significant reduction in a margin of safety?
No. The proposed change does not involve a decrease in the number
or capacity of the valves in the system, nor does it involve a change
in the relief valve setpoints, operability requirements, or limiting
conditions for operation. The margin of safety for the relief valves
is, in part, preserved by compliance with Section XI of the ASME Boiler
and Pressure Vessel Code and applicable Addenda as required by 10 CFR
[Part] 50, Section 50.55a(g). Although the proposed change will allow a
slightly longer testing frequency, the proposed change will continue to
preserve compliance with 10 CFR [Part] 50, Section 50.55a(g).
Therefore, the proposed change will not involve a reduction in a margin
of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room Location: University of New Orleans
Library, Louisiana Collection, Lakefront, New Orleans, LA 70122.
Attorney for licensee: N.S. Reynolds, Esq., Winston & Strawn 1400 L
Street N.W., Washington, D.C. 20005-3502.
NRC Project Director: John N. Hannon.
Florida Power and Light Company, et al., Docket No. 50-389, St. Lucie
Plant, Unit No. 2, St. Lucie County, Florida
Date of amendment request: December 29, 1997.
Description of amendment request: The licensee proposed to modify
specifications for selected cycle-specific reactor physics parameters
so that they refer to the St. Lucie Unit 2 Core Operating Limits Report
(COLR) for limiting values. Minor administrative changes are also
included. The proposed Technical Specification (TS) changes utilized
the guidance provided in Generic Letter 88-16 and are intended to be
consistent with the Standard Technical Specifications for Combustion
Engineering Plants (NUREG-1432, Revision 1).
[[Page 6986]]
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
(1) Operation of the facility in accordance with the proposed
amendment would not involve a significant increase in the probability
or consequences of an accident previously evaluated.
The proposed amendment relocates the calculated values of selected
cycle-specific reactor physics parameter limits from the TS to the
COLR, and includes minor editorial changes which do not alter the
intent of stated requirements. The amendment is administrative in
nature and has no impact on any plant configuration or system
performance relied upon to mitigate the consequences of an accident.
Parameter limits specified in the COLR for this amendment are not
changed from the values presently required by Technical Specifications.
Future changes to the calculated values of such limits may only be made
using NRC approved methodologies, must be consistent with all
applicable safety analysis limits, and are controlled by the 10 CFR
50.59 process. Assumptions used for accident initiators and/or safety
analysis acceptance criteria are not changed by this amendment.
Therefore, operation of the facility in accordance with the proposed
amendment will not involve a significant increase in the probability or
consequences of an accident previously evaluated.
(2) Operation of the facility in accordance with the proposed
amendment would not create the possibility of a new or different kind
of accident from any accident previously evaluated.
The proposed amendment relocates the calculated values of cycle
specific reactor physics limiting parameters to the COLR and will not
change the physical plant or the modes of operation defined in the
facility license. The changes do not involve the addition of new
equipment or the modification of existing equipment, nor do they alter
the design configuration of St. Lucie plant systems. Therefore,
operation of the facility in accordance with the proposed amendment
would not create the possibility of a new or different kind of accident
from any accident previously evaluated.
(3) Operation of the facility in accordance with the proposed
amendment would not involve a significant reduction in a margin of
safety.
The cycle specific parameter limits being relocated to the COLR by
this amendment have not been changed from the values presently required
by the TS, and a requirement to operate the plant within the bounds of
the limits specified in the COLR is retained in the individual
specifications. Future changes to the calculated values of these limits
by the licensee may only be developed using NRC-approved methodologies,
must remain consistent with all applicable plant safety analysis limits
addressed in the Final Safety Analysis Report (FSAR), and are further
controlled by the 10 CFR 50.59 process. As discussed in Generic Letter
88-16, the administrative controls established for the values of cycle
specific parameters using the guidance of that letter assure
conformance with 10 CFR 50.36. Safety analysis acceptance criteria are
not being altered by this amendment. Therefore, operation of the
facility in accordance with the proposed amendment would not involve a
significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Indian River Junior College
Library, 3209 Virginia Avenue, Fort Pierce, Florida 34954-9003.
Attorney for licensee: M.S. Ross, Attorney, Florida Power & Light,
P.O. Box 14000, Juno Beach, Florida 33408-0420.
NRC Project Director: Frederick J. Hebdon.
IES Utilities Inc., Docket No. 50-331, Duane Arnold Energy Center, Linn
County, Iowa
Date of amendment request: October 30, 1996.
Description of amendment request: The proposed amendment, included
as part of the proposed conversion from current Technical
Specifications (TS) to improved TS, would relax the required flowrates
in core spray, low pressure coolant injection (LPCI), and high pressure
coolant injection (HPCI) systems, based on the DAEC loss-of-coolant-
accident (LOCA) analysis, using an NRC-approved code, SAFER/GESTR-LOCA.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The proposed change will lower ECCS required flowrates in
accordance with accident analysis assumptions. The ECCS subsystems
affected by this change are not assumed to be initiators of analyzed
events. Therefore, the proposed change does not increase the
probability of any accident. The role of these ECCS subsystems is in
the mitigation of accident consequences. The proposed change decreases
pump flow rate requirements for Core Spray, LPCI and HPCI. The proposed
change does not increase the consequences of an accident because
accident analysis presented in NEDC-31310P, Duane Arnold Energy Center
SAFER/GESTR-LOCA Loss-of-Coolant Accident Analysis, uses these reduced
pump flow rates as analysis inputs and demonstrates that peak cladding
temperatures are maintained within regulatory limits. Therefore, this
change will not involve a significant increase in the consequences of
an accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed change will not involve any physical changes to plant
systems, structures, or components (SSCs), or the manner in which these
SSCs are operated, maintained, modified, tested, or inspected. As
demonstrated in NEDC-31310P, Duane Arnold Energy Center SAFER/GESTR-
LOCA Loss-of-Coolant Accident Analysis, at the reduced flowrates,
adequate ECCS capability will still exist to mitigate the consequences
of accidents. Therefore, this change will not create the possibility of
a new or different kind of accident from any accident previously
evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The proposed change does not significantly reduce the margin of
safety because accident analysis presented in NEDC-31310P, Duane Arnold
Energy Center SAFER/GESTR-LOCA Loss-of-Coolant Accident Analysis, uses
these reduced pump flow rates as analysis inputs. The accident analysis
demonstrates that with these reduced ECCS pump flow rates, the peak
clad temperature remains below the regulatory limit. Therefore, this
change does not involve a significant reduction in a margin of safety.
[[Page 6987]]
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Cedar Rapids Public Library,
500 First Street, S.E., Cedar Rapids, Iowa 52401.
Attorney for licensee: Jack Newman, Kathleen H. Shea, Morgan,
Lewis, & Bockius, 1800 M Street, NW., Washington, DC 20036-5869.
Acting NRC Project Director: Richard P. Savio.
IES Utilities Inc., Docket No. 50-331 Duane Arnold Energy Center, Linn
County, Iowa
Date of amendment requests: January 9, 1998.
Description of amendment requests: The proposed amendment would
revise the limiting condition for operation for primary containment
isolation valves (PCIVs). The revision would allow 72 hours to isolate
a failed valve associated with a closed system.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed amendment will not involve a significant increase
in the probability or consequences of an accident previously evaluated.
This change extends the time to isolate single PCIV penetrations
from 4 hours to 72 hours. The time allowed to isolate the penetration
is not assumed to be an initiator of any analyzed event. The 72 hour
period provides the necessary time to perform repairs on a failed
containment isolation valve when relying on an intact closed system.
Use of a closed system for isolation is directly equivalent to
isolating a failed containment isolation valve by use of a single
valve. The closed systems are subject to a Type A containment leakage
test, are missile protected, and are seismic Category 1 piping.
Allowing an additional 68 hours to isolate these penetrations will not
significantly increase the consequences of an accident since the intact
closed system provides adequate isolation. Also, the consequences of an
event occurring during the proposed 72 hour period are the same as
those during the current 4 hour period. The 72 hour period is
consistent with NRC-approved Traveler TSTF-30, Revision 2. Therefore,
this change does not involve a significant increase in the probability
or consequences of an accident previously evaluated.
2. The proposed amendment will not create the possibility of a new
or different kind of accident from any accident previously evaluated.
This change extends the time allowed to isolate single PCIV
penetrations from 4 hours to 72 hours. The additional 68 hours that the
penetrations are not isolated will not create the possibility of a new
or different kind of accident. Use of a closed system for isolation is
directly equivalent to isolating a failed containment isolation valve
by use of a single valve. The closed systems are subject to a Type A
containment leakage test, are missile protected, and are seismic
Category 1 piping. This change will not physically alter the plant (no
new or different type of equipment will be installed). The change in
allowed out-of-service-time is consistent with current safety analysis
assumptions. Therefore, this change does not create the possibility of
a new or different kind of accident from any accident previously
evaluated.
3. The proposed amendment does not involve a significant reduction
in a margin of safety.
This change extends the time allowed to isolate single PCIV
penetrations from 4 hours to 72 hours. During the additional time
allowed, a limiting event would still be assumed to be within the
bounds of the safety analysis assuming no single active failure. The 72
hour period is consistent with NRC-approved Traveler TSTF-30, Revision
2. Use of a closed system for isolation is directly equivalent to
isolating a failed containment isolation valve by use of a single
valve. Therefore, this change does not involve a significant reduction
in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment requests involve no significant hazards consideration.
Local Public Document Room location: Cedar Rapids Public Library,
00 First Street, SE., Cedar Rapids, Iowa 52401.
Attorney for licensee: Jack Newman, Al Gutterman, Morgan, Lewis &
Brockius, 1800 M Street, NW., Washington, DC 20036-5869.
NRC Acting Project Director: Richard P. Savio.
Omaha Public Power District, Docket No. 50-285, Fort Calhoun Station,
Unit No. 1, Washington County, Nebraska
Date of amendment request: December 11, 1997.
Description of amendment request: The proposed amendment would
revise the Technical Specifications (TS) to add a new Limiting
Condition for Operation (LCO) for an inoperable engineering safety
features (ESF) logic subsystem.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed change does not involve a significant increase in
the probability or consequences of an accident previously evaluated.
Omaha Public Power District (OPPD) proposes to incorporate a new
Limiting Condition for Operation (LCO) into Specification 2.15 which
will apply to an engineered safety features (ESF) logic subsystem when
the minimum operable channels or minimum degree of redundancy
requirements listed in Tables 2-3 and 2-4 are not met. The LCO proposes
an allowed outage time (AOT) of 48 hours to restore sufficient channels
to operability so as to exceed minimum requirements, or the plant must
be placed in hot shutdown within the following 12 hours.
The ESF logic system is a Class 1 protection system designed to
satisfy the criteria of IEEE 279, August 1968. Two functionally
redundant ESF logic subsystems ``A'' and ``B'' are provided to ensure
high reliability and effective in-service testing. These logic
subsystems are designed for individual reliability and maximum
attainable mutual independence both physically and electrically. Either
ESF logic subsystem acting alone can automatically actuate ESF
equipment and essential supporting systems.
The design of the ESF logic system is not being altered by this
change. The change allows a reasonable time to contact trained
personnel and adequately troubleshoot, perform and test repairs on an
inoperable ESF logic subsystem. The proposed AOT ensures that repairs
are thoroughly planned and accomplished without undue haste. In this
situation, the opposite ESF logic subsystem is operable as verified
through surveillance testing and capable of providing both automatic
and manual ESF equipment actuation.
The proposed AOT is similar to that of LCO 3.3.5, ``Engineered
Safety Features Actuation System (ESFAS)
[[Page 6988]]
Logic and Manual Trip (Analog),'' of Combustion Engineering Owners
Group (CEOG) Standard Technical Specification (STS), Rev. 1, dated
April 7, 1995.
Additional administrative revisions are proposed to either support
the new LCO (e.g., footnotes in Tables 2-3 & 2-4) or clarify existing
information. Therefore, OPPD concludes that the proposed LCO and
administrative revisions do not involve a significant increase in the
probability or consequences of an accident previously evaluated.
2. The proposed change does not create the possibility of a new or
different kind of accident from any accident previously evaluated.
There will be no physical alterations to the plant configuration,
changes to setpoint values, or changes to the application of setpoints
or limits because of these proposed changes. No changes in operating
modes are proposed. The proposed LCO provides a reasonable AOT to
troubleshoot, repair, and test an inoperable ESF logic subsystem. The
remaining ESF logic subsystem is still operable and capable of both
automatic and manual ESF equipment actuation. The remaining changes are
administrative in nature and thus none of the proposed changes create
the possibility of a new or different kind of accident from any
previously evaluated.
3. The proposed change does not involve a significant reduction in
a margin of safety.
The proposed LCO provides a reasonable AOT to troubleshoot, repair,
and test an inoperable ESF logic subsystem. The remaining ESF logic
subsystem is still operable as verified by surveillance testing and
capable of both automatic and manual ESF equipment actuation. With an
inoperable ESF logic subsystem, the ESF logic system would not be
single failure proof for a brief period of time. However, it is OPPD's
position that making repairs while the plant is at power and stable is
preferable to imposing a transient (manual shutdown) on the plant at a
time when the ESF logic system is no longer single failure proof.
Therefore, OPPD concludes that the proposed LCO and supporting
administrative changes do not result in a significant reduction in a
margin of safety.
Based on the above considerations, it is OPPD's position that this
proposed amendment does not involve significant hazards considerations
as defined by 10 CFR 50.92 and the proposed changes will not result in
a condition which significantly alters the impact of the Station on the
environment. Thus, the proposed changes meet the eligibility criteria
for categorical exclusion set forth in 10 CFR 51.22(c)(9) and pursuant
to 10 CFR 51.22(b) no environmental assessment need be prepared.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: W. Dale Clark Library, 215
South 15th Street, Omaha, Nebraska 68102.
Attorney for licensee: Perry D. Robinson, Winston & Strawn, 1400 L
Street, N.W., Washington, DC 20005-3502.
NRC Project Director: William H. Bateman.
Philadelphia Electric Company, Docket No. 50-352, Limerick
Generating Station, Unit 1, Montgomery County, Pennsylvania
Date of amendment request: January 12, 1998.
Description of amendment request: The Philadelphia Electric Company
submitted a Technical Specifications (TS) Change Request, requesting an
amendment to the TS (Appendix A) of Operating License No. NPF-39 for
Limerick Generating Station (LGS), Unit 1. This proposed change will
revise TS Table 4.4.6.1.3-1 to change the withdrawal schedule for the
first capsule to be withdrawn from 10 Effective Full Power Years (EFPY)
to 15 EFPY.
A revision to TS Surveillance Requirement 4.4.6.1.4 is also
proposed. This revision will remove the references to flux wire removal
and analysis that was originally required following the first cycle of
operation. The referenced flux wires were never located following the
first cycle of operation. This TS Surveillance Requirement will be
changed to refer to the flux wires that are located within the
surveillance capsules, which will be removed and analyzed in accordance
with the surveillance capsule removal schedule located in TS Table
4.4.6.1.3-1.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed Technical Specifications (TS) changes do not
involve a significant increase in the probability or consequences of an
accident previously evaluated.
The proposed changes do not increase the probability of occurrence
of an accident previously evaluated in the safety analysis report and
do not affect any accident initiators as described in the SAR [Safety
Analysis Report]. The changes revise the withdrawal schedule for the
reactor vessel material surveillance capsules from 10 Effective Full
Power Years (EFPY) to 15 EFPY. The capsules are not an initiator of any
previously analyzed accident nor does the withdrawal schedule of the
surveillance capsule affect the probability or consequences of any
previously analyzed accident.
These changes will not affect the Pressure-Temperature (P-T) limits
as given in LGS Technical Specification (TS) Figure 3.4.6.1-1 and UFSAR
[Updated Final Safety Analysis Report] Figure 5.3-4. P-T limits are
imposed on the reactor coolant system to ensure that adequate safety
margins exist during normal operation, anticipated operational
occurrences, and system hydrostatic tests. The P-T limits are related
to the RTNDT [reference temperature], as described in ASME
Section III, Appendix G. Changes in the fracture toughness properties
of reactor pressure vessel (RPV) beltline materials, resulting from
neutron irradiation and the thermal environment, are monitored by a
surveillance program in compliance with the requirements of 10 CFR 50
Appendix H. The effect of neutron fluence on the shift in the
RTNDT is predicted by methods given in Regulatory Guide
1.99, Rev. 2.
As detailed in Attachment 3 [of the licensee's application dated
January 12, 1998], for LGS Unit 1, the combination of low expected
RTNDT shift for the plate material due to low predicted
fluence and excellent material chemistry, Supplemental Surveillance
Program (SSP) data on similar material, and the inherent margin in the
P-T curve calculations--with the withdrawal schedule of the first
surveillance capsule modified from 10 EFPY to 15 EFPY--will result in a
more credible set of surveillance data while ensuring the continued
safe operation of LGS Unit 1.
LGS's current P-T limits were established based on adjusted
reference temperatures developed in accordance with the procedures
prescribed in Regulatory Guide 1.99, Rev. 2, Regulatory Position 1,
``Surveillance Data Not Available.'' Calculation of adjusted reference
temperature by these procedures includes a conservative base fluence
estimate, power rerate adjustment of a 110% fluence multiplier from
startup--instead of a 105% fluence
[[Page 6989]]
multiplier since 1R06 [Unit 1 refueing outage 6], and a margin term to
ensure conservative, upper-bound values are used for the calculation of
the P-T limits. Revision of the first capsule withdrawal schedule will
not affect the P-T limits because the capsule constitutes one set of
credible surveillance data. The curves will continue to be established
in accordance with Regulatory Position 1 procedures.
As per Regulatory Guide 1.99, Radiation Embrittlement of Reactor
Vessel Materials, Revision 2, Regulatory Position 2, ``Surveillance
Data Available,'' the collection of two or more sets of credible
surveillance data is necessary to empirically calculate the adjusted
reference temperature (ART). Each surveillance capsule constitutes one
set of credible surveillance data. This calculated ART can be used to
revise the Pressure-Temperature (P-T) curves (Technical Specification
Figure 3.4.6.1-1). Without two or more sets of credible data, the ART
must be calculated and the P-T curves revised, based upon the
calculational methodologies as provided in the Regulatory Guide 1.99,
Rev. 2, Regulatory Position 1, ``Surveillance Data Not Available.''
These methodologies use plant specific chemistry and fluence values to
determine a calculated shift in RTNDT. A ``margin'' term is
then added to obtain conservative, upper-bound values of adjusted
reference temperature.
The existing LGS Unit 1 P-T curves are currently valid up to 12
EFPY. With first capsule removal at either 10 or 15 EFPY, the existing
P-T curves will require a revision prior to reaching 12 EFPY based upon
the calculational methodologies as contained in the Regulatory Guide
1.99, Rev. 2, Regulatory Position 1, ``Surveillance Data Not
Available.'' Therefore, the revision to the first capsule withdrawal
schedule results in no impact to the calculational methodologies that
will be used for the P-T curve revision that will be necessary to
extend the curves beyond 12 EFPY.
The fluence data as determined from the surveillance capsule flux
wires at 15 EFPY will provide an accurate indication of neutron
fluence. In accordance with Regulatory Guide 1.99, Rev. 2, Regulatory
Position 1 methodology, data from these flux wires will permit an
adjustment of TS Figure 3.4.6.1-1 in accordance with TS surveillance
requirement 4.4.6.1.3, if required, and will meet the requirements of
10 CFR 50 Appendix H and ASTM E-185.
These changes will not affect any plant safety limits or limiting
conditions of operation. The proposed changes will not affect reactor
pressure vessel performance as they do not involve any physical
changes, and LGS P-T limits will remain conservative in accordance with
Reg. Guide 1.99, Rev. 2 requirements. The proposed changes will not
cause the RPV or interfacing systems to be operated outside of their
design or testing limits.
The proposed changes do not increase the consequences of a
malfunction of equipment important to safety previously evaluated in
the SAR. The proposed changes do not involve any physical changes to
equipment important to safety. The potential for RPV failure will be
adequately assessed by the proposed withdrawal schedule. In addition,
the results from the SSP will provide industry data that bounds the
materials used in the LGS Unit 1 reactor pressure vessel until the data
from the first LGS Unit 1 capsule is available. The proposed changes
provide the same level of confidence in the integrity of the vessel.
Therefore, the proposed TS changes do not involve an increase in
the probability or consequences of an accident previously evaluated.
2. The proposed TS changes do not create the possibility of a new
or different kind of accident from any accident previously evaluated.
The proposed changes do not create the possibility of a different
type of accident than any previously evaluated in the SAR. The proposed
changes will revise the withdrawal schedule for the first reactor
pressure vessel (RPV) material surveillance capsule from 10 Effective
Full Power Years (EFPY) to 15 EFPY. These proposed changes do not
involve a physical modification of the design of plant structures,
systems or components. The proposed changes will not impact the manner
in which the plant is operated, as plant operating and testing
procedures will not be affected by the changes. No new accident types
or failure modes will be introduced as a result of the proposed
changes.
LGS's current Pressure-Temperature (P-T) limits were established
based on adjusted reference temperatures developed in accordance with
the procedures prescribed in Regulatory Guide 1.99, Rev. 2, Regulatory
Position 1, ``Surveillance Data Not Available.'' Calculation of
adjusted reference temperature by these procedures includes a
conservative base fluence estimate, power rerate adjustment of a 110%
fluence multiplier from startup--instead of a 105% fluence multiplier
since 1R06, and a margin term to ensure conservative, upper-bound
values are used for the calculation of the P-T limits. Revision of the
first capsule withdrawal schedule will not affect the P-T limits
because the capsule constitutes one set of credible surveillance data.
The curves will continue to be established in accordance with
Regulatory Position 1 procedures.
The existing LGS Unit 1 P-T curves are currently valid up to 12
EFPY. With first capsule removal at either 10 or 15 EFPY, the existing
P-T curves will require a revision, prior to reaching 12 EFPY, based
upon the calculational methodologies as contained in the Regulatory
Guide 1.99, Rev. 2, Regulatory Position 1, ``Surveillance Data Not
Available.''
Therefore, the Technical Specification (TS) revision to the first
capsule withdrawal schedule results in no impact to the calculational
methodologies that will be used for the P-T curve revision that will be
necessary to extend the curves beyond 12 EFPY.
The fluence data as determined from the surveillance capsule flux
wires at 15 EFPY will provide an accurate indication of neutron
fluence. In accordance with Regulatory Guide 1.99, Rev. 2, Regulatory
Position 1 methodology, data from these flux wires will permit an
adjustment of TS Figure 3.4.6.1-1 in accordance with TS Surveillance
Requirement 4.4.6.1.3, if required, and will meet the requirements of
10 CFR 50 Appendix H and ASTM E-185.
The potential for reactor pressure vessel (RPV) failure will
continue to be adequately assessed by the proposed withdrawal schedule.
As detailed in Attachment 3, the combination of the low expected shift
for the plate material, SSP data on similar material, and the inherent
margin in the P-T curve calculations will result in a credible set of
surveillance data, while ensuring the continued safe operation of LGS
Unit 1. The proposed changes provide the same level of confidence in
the integrity of the RPV.
Therefore, the proposed TS changes do not create the possibility of
a new or different kind of accident from any accident previously
evaluated.
3. The proposed TS changes do not involve a significant reduction
in a margin of safety.
The proposed changes to the Technical Specifications (TS) do not
reduce the margin of safety as defined in the Bases for any TS. The
proposed changes will not affect any safety limits, limiting safety
system settings, or limiting conditions of operation. The proposed
changes do not represent a change in initial conditions, system
response time, or in any other parameter
[[Page 6990]]
affecting the accident analyses supporting the Bases of any TS. The
proposed changes do not involve revision of the P-T limits but rather a
revision of the withdrawal schedule for the first surveillance capsule.
The current P-T limits were established based on the adjusted reference
temperatures for vessel beltline materials calculated in accordance
with Regulatory Position 1 of Reg. Guide 1.99, Rev. 2. P-T limits will
continue to be revised as necessary for changes in adjusted reference
temperature due to changes in fluence according to Regulatory Position
1 until two or more credible surveillance data sets become available.
When two or more credible surveillance data sets become available, P-T
limits will be revised as prescribed by Regulatory Position 2 of Reg.
Guide 1.99, Rev. 2 or other NRC approved guidance.
The current P-T limit curves are inherently conservative and
provide sufficient margin to ensure the integrity of the reactor
pressure vessel. The proposed changes do not adversely affect these
curves. The fluence data as determined from the surveillance capsule
flux wires at 15 EFPY will provide an accurate indication of neutron
fluence.
In accordance with Regulatory Guide 1.99, Rev. 2, Regulatory
Position 1 methodology, data from these flux wires will permit an
adjustment of TS Figure 3.4.6.1-1 in accordance with TS Surveillance
Requirement 4.4.6.1.3, if required, and will meet the requirements of
10 CFR 50 Appendix H and ASTM E-185.
Therefore, the proposed TS changes do not involve a reduction in a
margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Pottstown Public Library, 500
High Street, Pottstown, PA 19464.
Attorney for licensee: J.W. Durham, Sr., Esquire, Sr. V.P. and
General Counsel, Philadelphia Electric Company, 2301 Market Street,
Philadelphia, PA 19101.
NRC Project Director: John F. Stolz.
Philadelphia Electric Company, Docket Nos. 50-352 and 50-353,
Limerick Generating Station, Units 1 and 2, Montgomery County,
Pennsylvania
Date of amendment request: September 2, 1997.
Description of amendment request: This proposed Technical
Specification (TS) Change Request revises TS Sections 4.0.5, and Bases
Sections B 4.0.5 and B 3/4.4.8, for Limerick Generating Station (LGS),
Units 1 and 2, pertaining to the surveillance requirement associated
with Inservice Inspection (ISI) and Inservice Testing (IST) activities
for American Society of Mechanical Engineers (ASME) Boiler and Pressure
Vessel (B&PV) Code, Class 1, 2, and 3 components.
The existing wording in TS Section 4.0.5, and Bases Sections B
4.0.5 and B 3/4.4.8, stipulates that ISI and IST surveillance
activities for ASME Code Class 1, 2, and 3 components be conducted in
accordance with the requirements of Section XI of the ASME Code as
required by 10 CFR 50.55a(g). The proposed changes will revise the
applicable TS sections to only make reference to 10 CFR 50.55a, since
the current regulations have separated the specific requirements for
ISI and IST into sections 50.55a(g) and 50.55a(f), respectively.
The existing wording of TS Section 4.0.5, and Bases Sections B
4.0.5 and B 3/4.4.8, also requires that ISI and IST surveillance
activities be conducted in accordance with the requirements of Section
XI of the ASME Boiler and Pressure Vessel Code, except where specific
written relief has been granted by the NRC. This wording precludes the
immediate implementation of alternative testing in the event that a
Code required inspection has been identified as clearly impractical.
The proposed TS changes will revise the applicable TS sections to
eliminate the requirement that written relief be obtained prior to
implementation of alternative testing during the initial 120-month
inspection interval, and the initial 12 months of subsequent intervals
in cases where the Code required inspections have been found to be
clearly impractical. NUREG-1482, ``Guidelines for Inservice Testing at
Nuclear Power Plants,'' discusses impracticality as being a situation
where a test cannot be performed due to limitations in design (which
includes prohibitive dose rates), construction, or system
configuration.
Furthermore, TS Section 4.0.5b. currently discusses the required
frequency of ISI and IST surveillance activities required by the ASME
Code. The existing TS address testing frequencies of up to one (1)
year. In some cases, the ASME Code requires that testing be performed
on a two (2) year frequency. The proposed TS changes will also revise
the TS to include a reference for tests that are conducted on a
biennial frequency. Inclusion of this reference will permit the
application of TS 4.0.2 criteria for ISI and IST surveillance
activities. This will permit a 25 percent time extension to be applied
to the surveillance frequency, if necessary, in order to allow for
consideration of plant operating conditions when scheduling ISI and IST
surveillance tests.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed Technical Specifications (TS) changes do not
involve a significant increase in the probability or consequences of an
accident previously evaluated.
The proposed TS changes are administrative in nature and do not
make physical modifications or changes to the plant structures,
systems, or components (SSC). Plant SSC will continue to function as
designed. The proposed TS changes will not alter equipment operational
practices or procedures.
In the event that an ASME Section XI Code required inspection or
test is found to be impractical due to unforeseen conditions, written
relief would still be requested from the NRC in accordance with
established procedures. No code required inspection will be eliminated
from the ISI or IST Programs until written approval has been granted by
the NRC as required [by] 10CFR50.55a. It is anticipated that the only
time this provision would be utilized would be in the event that an
inspection or test is discovered to be impossible or impractical to
perform due to unforeseen or unexpected high radiation conditions, or
physical limitations. This change will also clarify the applicability
of surveillance intervals to biennial tests or examinations.
The proposed TS changes will remove the inconsistencies between the
LGS TS and the requirements of 10CFR50.55a, and will also ensure that
the implementation of the LGS ISI and IST Programs are consistent with
current NRC guidance as specified in NUREG-1482 and NUREG-1433,
Revision 1.
Therefore, the proposed TS changes do not involve a significant
increase in the probability or consequences of an accident previously
evaluated.
2. The proposed TS changes do not create the possibility of a new
or different kind of accident from any accident previously evaluated.
[[Page 6991]]
The proposed changes apply to the administrative requirements for
testing of plant systems. No physical modifications to systems or
components are involved. No new failure modes which could cause or
contribute to the cause of an accident are being introduced.
The proposed TS changes will remove the inconsistencies between the
LGS TS and the requirements of 10CFR50.55a, and will also ensure that
the implementation of the LGS ISI and IST Programs are consistent with
current NRC guidance as specified in NUREG-1482 and NUREG-1433,
Revision 1.
Therefore, the proposed TS changes do not create the possibility of
a new or different kind of accident from any accident previously
evaluated.
3. The proposed TS changes do not involve a significant reduction
in a margin of safety.
No physical plant modifications or operational procedure changes
are being made as a result of the proposed TS changes. The proposed TS
changes apply to the ISI and IST Programs' surveillance requirements
and do not modify the scope or frequency of these Programs as required
by 10 CFR 50.55a. The proposed TS changes will eliminate
inconsistencies between current TS wording and the requirements
specified in 10CFR50.55a. In addition, the proposed changes are
consistent with the guidance stipulated in NUREG-1482 and NUREG-1433,
Revision 1. No physical plant modifications or operational procedure
changes are being introduced as a result of this proposed TS Change.
Therefore, the proposed TS changes do not involve a reduction in a
margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Pottstown Public Library, 500
High Street, Pottstown, PA 19464.
Attorney for licensee: J. W. Durham, Sr., Esquire, Sr. V.P. and
General Counsel, Philadelphia Electric Company, 2301 Market Street,
Philadelphia, PA 19101.
NRC Project Director: John F. Stolz.
Power Authority of the State of New York, Docket No. 50-333, James A.
FitzPatrick Nuclear Power Plant, Oswego County, New York
Date of amendment request: October 8, 1997.
Description of amendment request: This amendment proposes revisions
to the actions to be taken in the event multiple control rods are
inoperable.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Involve a significant increase in the probability or
consequences of an accident previously evaluated because:
The number and distribution of inoperable control rods is not a
precursor to any accident, therefore the probability of an accident is
not affected. The proposed changes assure the assumptions used in
evaluation of accidents are satisfied, therefore there will be no
increase in the consequences of an accident previously evaluated.
2. Create the possibility of a new or different kind of accident
from any accident previously evaluated because:
Changing the allowable number and distribution of inoperable
control rods and the power level at which these limits apply to be
consistent with the accident analyses does not create the possibility
of a new or different kind of accident.
3. Involve a significant reduction in a margin of safety because:
The proposed changes assure the assumptions used in the accident
analyses are satisfied, therefore there will be no affect on the margin
of safety as a result of these changes.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Reference and Documents
Department, Penfield Library, State University of New York, Oswego, New
York 13126.
Attorney for licensee: Mr. David E. Blabey, 1633 Broadway, New
York, New York 10019.
NRC Project Director: S. Singh Bajwa, Director.
Southern California Edison Company, et al., Docket Nos. 50-361 and
50-362, San Onofre Nuclear Generating Station, Unit Nos. 2 and 3,
San Diego County, California
Date of amendment requests: November 6, 1995, as supplemented by
letter dated January 9, 1998. The supplemental submittal supersedes the
staff's proposed no significant hazards consideration determination
evaluation for the requested changes that were published on April 10,
1996 (61 FR 15996).
Description of amendment requests: In the November 6, 1995, letter,
the licensee proposed to revise Technical Specification (TS) 3.5.1,
``Safety Injection Tanks,'' to extend, in general, the allowed outage
time (AOT) for a single inoperable safety injection tank (SIT) from 1
hour to 24 hours. Additionally, the licensee proposed to extend the SIT
AOT from 1 hour to 72 hours if a single SIT becomes inoperable due to
malfunctioning SIT water level and/or nitrogen cover pressure
instrumentation. The January 9, 1998, letter modifies the original
request by adding a new TS 5.5.2.14, ``Configuration Risk Management
Program,'' that ensures a proceduralized probabilistic risk assessment-
informed process is in place that assesses the overall impact of plant
maintenance on plant risk.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed change does not involve a significant increase in
the probability or consequences of an accident previously evaluated.
The Safety Injection Tanks (SITs) are passive components in the
Emergency Core Cooling System (ECCS). The SITs are not accident
initiators in any accident previously evaluated. Therefore, this change
does not involve an increase in the probability of an accident
previously evaluated.
The SITs are designed to mitigate the consequences of Loss of
Coolant Accidents (LOCAs). The proposed changes do not affect any of
the assumptions used in deterministic LOCA analysis. Therefore, the
consequences of accidents previously evaluated do not change.
To fully evaluate the SIT Completion Time extension, Probabilistic
Safety Analysis (PSA) methods were utilized. The results of these
analyses show no significant increase in core damage frequency. As a
result, there would be no significant increase in the consequences of
an accident previously evaluated.
The proposed change pertaining to SIT inoperability based solely on
instrumentation malfunction does not involve a significant increase in
the consequences of an accident as evaluated and endorsed by the
Nuclear Regulatory Commission (NRC) in
[[Page 6992]]
NUREG-1366, ``Improvements to Technical Specifications Surveillance
Requirements.''
The Configuration Risk Management Program is an Administrative
Program that assesses risk based on plant status. Adding the
requirement to implement this program for Technical Specification 3.5.1
does not affect the probability or the consequences of an accident.
Therefore, this change does not involve a significant increase in
the probability or consequences of any accident previously evaluated.
2. The proposed change does not create the possibility of a new or
different kind of accident from any accident previously evaluated.
This proposed change does not change the design, configuration, or
method of operation of the plant. Therefore, this change does not
create the possibility of a new or different kind of accident from any
previously evaluated.
3. The proposed change does not involve a significant reduction in
a margin of safety.
The proposed changes do not affect the limiting conditions for
operation or their bases that are used in the deterministic analyses to
establish the margin of safety. PSA evaluations were used to evaluate
these changes. These evaluations demonstrate that the changes are
either risk neutral or risk beneficial.
Therefore, this change does not involve a significant reduction in
a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment requests involve no significant hazards consideration.
Local Public Document Room location: Main Library, University of
California, Irvine, California 92713.
Attorney for licensee: T. E. Oubre, Esquire, Southern California
Edison Company, P. O. Box 800, Rosemead, California 91770.
NRC Project Director: William H. Bateman.
Southern California Edison Company, et al., Docket Nos. 50-361 and
50-362, San Onofre Nuclear Generating Station, Unit Nos. 2 and 3,
San Diego County, California
Date of amendment requests: November 8, 1995, as supplemented by
letter dated January 9, 1998. The supplemental submittal supersedes the
staff's proposed no significant hazards consideration determination
evaluation for the requested changes that were published on April 10,
1996 (61 FR 15996).
Description of amendment requests: In the November 8, 1995, letter,
the licensee proposed to revise Technical Specification (TS) 3.5.2,
``ECCS--Operating,'' to extend the allowed outage time from 72 hours to
7 days for a single low pressure safety injection train. The January 9,
1998, letter modifies the original request by adding a new TS 5.5.2.14,
``Configuration Risk Management Program,'' that ensures a
proceduralized probabilistic risk assessment-informed process is in
place that assesses the overall impact of plant maintenance on plant
risk.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed change does not involve a significant increase in
the probability or consequences of an accident previously evaluated.
The Low Pressure Safety Injection (LPSI) system is a part of the
Emergency Core Cooling System (ECCS) subsystem. Inoperable LPSI
components are not considered to be accident initiators. Therefore,
this change does not involve an increase in the probability of an
accident previously evaluated.
The LPSI system is primarily designed to mitigate the consequences
of a large Loss of Coolant Accident (LOCA). This proposed change does
not affect any of the assumptions used in the deterministic LOCA
analysis. Therefore, the consequences of accidents previously evaluated
do not change.
To fully evaluate the LPSI Completion Time extension, Probabilistic
Safety Analysis (PSA) methods were utilized. The results of these
analyses show no significant increase in core damage frequency. As a
result, there would be no significant increase in the consequences of
an accident previously evaluated.
The Configuration Risk Management Program is an Administrative
Program that assesses risk based on plant status. Adding the
requirement to implement this program for Technical Specification 3.5.2
does not affect the probability or the consequences of an accident.
Therefore, this change does not involve a significant increase in
the probability or consequences of any accident previously evaluated.
2. The proposed change does not create the possibility of a new or
different kind of accident from any accident previously evaluated.
This proposed change does not change the design, configuration, or
method of operation of the plant. Therefore, this change does not
create the possibility of a new or different kind of accident from any
previously evaluated.
3. The proposed change does not involve a significant reduction in
a margin of safety.
The proposed change does not affect the limiting conditions for
operation or their bases that are used in the deterministic analyses to
establish the margin of safety. PSA evaluations were used to evaluate
these changes.
Therefore, this change does not involve a significant reduction in
a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment requests involve no significant hazards consideration.
Local Public Document Room location: Main Library, University of
California, Irvine, California 92713.
Attorney for licensee: T. E. Oubre, Esquire, Southern California
Edison Company, P. O. Box 800, Rosemead, California 91770.
NRC Project Director: William H. Bateman.
Southern California Edison Company, et al., Docket Nos. 50-361 and
50-362, San Onofre Nuclear Generating Station, Unit Nos. 2 and 3,
San Diego County, California
Date of amendment requests: July 29, 1996.
Description of amendment requests: The licensee proposes to revise
Technical Specification (TS) 3.7, ``Plant Systems,'' and TS 4.3, ``Fuel
Storage,'' to permit an increase in the licensed storage capacity of
the spent fuel pools.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed change does not involve a significant increase in
the probability or consequences of an accident previously evaluated.
In the course of previous analyses and the analyses required to
support the consolidation and storage of spent fuel assemblies
generated by the San Onofre Nuclear Generating Station Units 1, 2 and 3
(SONGS 1, 2 and 3), the
[[Page 6993]]
enveloping scenarios described below have been considered. The limiting
event or accident is considered that which produces the greatest
radiological dose consequences.
(1) Design Basis Fuel Handling Accidents. Postulated fuel handling
accidents consider drops of either a spent fuel assembly or a
consolidated fuel canister in the spent fuel pool (SFP) or cask pool.
In addition to damage to the dropped fuel assembly or consolidated fuel
canister, a fuel assembly or consolidated fuel canister seated in the
SFP or the cask pool may be impacted by the drop. Alternatively, the
dropped assembly or canister may fall over an empty rack cell, or fall
onto the pool floor/liner. These various scenarios have been
considered.
The reference fuel in the analysis presented below is SONGS 2 and 3
fuel. Due to the longer decay time, lower burnup, and lower operating
power of SONGS 1 fuel, the consequences of damage to SONGS 1 fuel are
bounded by the consequences of damage to SONGS 2 and 3 fuel.
(a) Dropped Fuel Assembly. The limiting and design basis fuel
assembly drop event is a 254-inch drop of a vertically-oriented fuel
assembly, which has decayed for 72 hours, onto the SFP floor, followed
by rotation of the fuel assembly to the horizontal position. The
postulated bounding event results in a total of 60 fuel rods failing,
which will not change as a result of fuel consolidation.
The probability of a spent fuel assembly drop during movement of
spent fuel is slightly increased by fuel consolidation because the
candidate fuel assemblies are moved from their individual rack cell
location to the cask pool for consolidation. However, this increase in
probability is not significant since the process and equipment used to
move fuel assemblies will not be changed. Additionally, fuel movement
activities will be performed by personnel trained, qualified, and
certified in fuel handling operations. Therefore, the increase in
probability of a spent fuel assembly drop due to fuel consolidation is
not significant.
The SFP water leakage consequences of a fuel assembly drop are
bounded by the consequences of a postulated empty spent fuel rack drop.
The resulting leakage (approximately 49 gallons per minute) is well
within the makeup water supply capability (150 gallons per minute).
Additionally, the water loss would be contained within the spent fuel
pool leak chase system and would not be released to the soil or the
environment.
Spent fuel assemblies will be decayed (subcritical) at least 72
hours prior to being moved and at least 6 months prior to being
consolidated. Administrative controls will require that fuel assemblies
being moved to and from the consolidation work station, and when in the
work station, be separated by more than 12 inches of water from edge to
edge to maintain neutronic isolation. Criticality calculations show
that with 1800 parts per million (ppm) minimum boron concentration in
the SFP water (Technical Specifications limit of 1850 ppm includes 50
ppm measurement uncertainty), a dropped fuel assembly event will not
result in fuel criticality.
Without crediting filtration by the fuel handling building (FHB)
post-accident cleanup units, the offsite doses which result from this
scenario are well within the required limits, i.e., less than 25
percent (%) of the limits imposed by 10 CFR 100. The control room doses
meet 10 CFR 50, Appendix A, General Design Criterion (GDC) 19 limits
when crediting the control room emergency air cleanup system.
Therefore, the consequences of a fuel handling accident remain
enveloped by the fuel assembly drop event.
In conclusion, the probability and consequences of a fuel assembly
drop event will not be significantly increased by the proposed fuel
consolidation activity.
(b) Dropped Consolidated Fuel Canister. A dropped consolidated fuel
canister event does not involve significantly new failure mechanisms
compared with a dropped fuel assembly event. The limiting event in this
category is a 74-inch drop of a consolidated fuel canister from the
spent fuel handling machine (SFHM) into a rack cell containing a
consolidated fuel canister. The structural integrity of the racks would
not be impacted and both consolidated fuel canisters would remain
intact. However, it is conservatively assumed that all 944 fuel rods
within the two canisters (472 rods/canister x 2 canisters) are
damaged.
The probability of a consolidated fuel canister drop is not
expected to vary significantly from that expected for a fuel assembly
drop because the methods and equipment used to move consolidated fuel
canisters will not be significantly different from those used for fuel
assemblies. Additionally, effective training methods, administrative
controls, and equipment design will be developed to minimize the
likelihood of dropping a canister during the consolidation process.
The SFP water leakage consequences of a consolidated fuel canister
drop are bounded by the consequences of a postulated empty spent fuel
rack drop as discussed previously in Item 1.1(a).
The criticality calculations show that, with the required 1800 ppm
boron concentration in the SFP and cask pool water, there are no
criticality consequences of postulated consolidated fuel canister
drops. In all cases, the structural integrity of the racks will be
maintained. The portions of the canisters where fuel is contained
(above and inclusive of the bottom plate) will maintain their
structural integrity in all drop cases.
The offsite doses which result from this scenario are bounded by
the fuel assembly drop event discussed previously in Item 1.1(a) (60
failed fuel rods in an assembly which has decayed 72 hours) and are
well within (less than 25% of) the limits imposed by 10 CFR 100. The
control room doses meet the GDC 19 limits when crediting the control
room emergency air cleanup system. Therefore, the consequences of a
consolidated fuel canister drop event are enveloped by the limiting
fuel assembly drop event.
In conclusion, the probability and consequences of the limiting
fuel drop event will not be significantly increased by storing
consolidated fuel in canisters.
(2) Spent Fuel Pool (SFP) Gate Drop. The limiting case is a SFP
gate drop on a fuel assembly. Analysis has shown that only one assembly
would be impacted and all 236 rods in the assembly potentially damaged
subsequent to a drop of the SFP gate. The radiological consequences are
shown to be acceptable (less than 25% of 10 CFR 100 limits).
Current gate lift height restrictions (no more than 30 inches above
the racks) will be maintained for fuel consolidation. With these
restrictions, fuel in only one rack cell (either a spent fuel assembly
with 236 rods or a consolidated fuel canister with 472 rods) would be
impacted with all rods in the fuel assembly or canister being
potentially damaged.
The probability of a SFP gate drop is not significantly increased
by fuel consolidation because the process and equipment used to move
the gate will not change and because the gate will be kept open and not
moved or removed when fuel is located in the cask pool during
consolidation (administrative control).
Despite the additional fuel rods in a consolidated fuel canister
(472 rods versus 236 rods in a fuel assembly), the minimum six month
decay time allows more than 99.9% of the radioactive gases to decay.
Thus, a gate drop that results in a damaged fuel assembly 72
[[Page 6994]]
hours after shutdown is more limiting than a gate drop that results in
a damaged consolidated fuel canister. With the analysis demonstrating
impact of fuel in only one cell, offsite doses remain well within (less
than 25% of) the limits of 10 CFR 100 without taking credit for the FHB
filters. The control room emergency air cleanup system will maintain
control room doses within GDC 19 limits.
Therefore, the probability and consequences of a gate drop will not
be significantly increased due to the proposed fuel consolidation
activity.
(3) Test Equipment Skid Drop. Current test equipment skid height
restrictions (no more than 72 inches above rack cells containing SONGS
2 and 3 fuel assemblies or 30 feet 8 inches above those containing
SONGS 1 assemblies) will be maintained after fuel consolidation is
implemented. These restrictions will ensure that the potential depth of
penetration of test equipment skid into the racks is not sufficient to
damage stored fuel.
The probability of a test equipment skid drop is not affected by
fuel consolidation because the methods and equipment used to move the
skid will not change. In addition, there are no adverse criticality
consequences of a test equipment skid drop on a fuel assembly or
consolidated fuel canister, since the structural configuration of the
fuel or of the impacted storage rack cells is not significantly changed
because of the drop impact.
Since no fuel is damaged, the probability and consequences of a
test equipment skid drop will not be significantly increased due to the
proposed fuel consolidation activity.
(4) Cask Handling Crane Load Drops. The types of loads currently
lifted by the cask handling crane include spent fuel casks,
transshipment casks, and the crane load block. To support consolidation
activities, lifts of the fuel consolidation equipment will also be
performed by the cask handling crane. The travel path of the cask
handling crane does not extend over spent fuel in the SFP.
Administrative controls will prohibit operation of the cask handling
crane, including the crane load block, within ten feet of the edge of
the cask pool when fuel is present in the cask pool during
consolidation. The handling of heavy loads by the cask handling crane
is governed by the SONGS heavy loads program which has received Nuclear
Regulatory Commission (NRC) approval. The movement of fuel
consolidation equipment by the cask handling crane will be evaluated
under the heavy loads program. Thus, an accident resulting from cask
handling crane load drops into the SFP or onto irradiated fuel in the
cask pool is not credible.
It is expected that the consolidation work station in the cask pool
will be temporarily removed prior to any spent fuel cask, transshipment
cask, or other load lifts/movements over the cask pool. Other than
insertion and removal of the consolidation work station, the equipment
and procedures used to lift and move cask handling crane loads will be
unaffected by fuel consolidation.
Therefore, the probability and consequences of a spent fuel cask or
transshipment cask drop are not significantly increased by the proposed
fuel consolidation activity.
(5) Mispositioning of a Consolidated Fuel Canister. The probability
of mispositioning a consolidated fuel canister is expected to be
comparable to that for mispositioning of a spent fuel assembly because
the methods and equipment used to move and position consolidated fuel
canisters in rack cells will not be significantly different from those
used for fuel assemblies. Additionally, fuel movement activities are
and will continue to be performed by personnel trained, qualified, and
certified in fuel handling operations.
The potential consequences of a mispositioned consolidated fuel
canister relate to fuel criticality. The burnup of the fuel stored in
the SFP before, during, and after consolidation will conform to the
criteria provided in the Technical Specifications. With the minimum
required 1800 ppm (1850 ppm plus 50 ppm measurement uncertainty) boron
concentration in the SFP and the Region II racks loaded with fuel which
meets the burnup criteria of Technical Specification 3.7.18, k-eff
remains less than 0.90 for a consolidated fuel canister mispositioned
in the Region II racks.
Therefore, the probability and consequences of mispositioning a
consolidated fuel canister are not significantly higher than the
probability and consequences of mispositioning a fuel assembly.
(6) Maximum Flow Blockage to Cool Spent Fuel. Flow blockage to a
consolidated fuel canister may be caused by either damage to the
canister or loose material in the spent fuel pool or cask pool.
Canisters will be inspected prior to being placed in the cask pool
(prior to loading with fuel), and if damaged during movement or
placement in the spent fuel pool. Additionally, the existing foreign
material exclusion control in the spent fuel pool area will be utilized
for fuel consolidation. Therefore, the probability of blocking flow to
a consolidated fuel canister will not be significantly increased.
The temperature effects of a postulated flow blockage of a
consolidated fuel canister were evaluated relative to the anticipated
maximum cladding temperature of 700 degrees Fahrenheit (700 deg.F)
during reactor full power. Each rack storage cell has large or multiple
flow holes to virtually eliminate the possibility that all flow in a
cell would be blocked by debris or foreign material. The flow openings
in the canisters will be designed to maintain a clear flow area of at
least 20% under all postulated blockage conditions. For the postulated
80% flow blockage, the resulting maximum cladding temperature is
233.1 deg.F, which is well below the maximum anticipated cladding
temperature of 700 deg.F during reactor full power.
Therefore, the probability and consequences of flow blockage will
not be significantly increased by the proposed fuel consolidation
activity.
(7) Loss of Spent Fuel Pool (SFP) Cooling. The probability of loss
of SFP cooling is not affected by fuel consolidation because the
existing SFP cooling system will perform its design function without
modification.
The overall design basis (maximum abnormal) heat load will be
increased due to an increased number of spent fuel elements stored. The
cask pool may be used for temporary storage of spent fuel assemblies
during consolidation. Loss of cooling flow to the cask pool has not
been specifically analyzed. However, because of administrative controls
which limit the amount of fuel permitted in the cask pool during
consolidation and require the gate between the cask pool and the SFP to
be open when fuel is present in the cask pool, this accident scenario
is bounded by the SFP boiling case discussed below.
An analysis of loss of SFP cooling has been performed using the
design basis consolidated fuel heat load. This analysis shows that,
without crediting the FHB filters, the offsite doses will remain well
within (less than 25% of) the 10 CFR 100 limits. Since the reactivity
will decrease with increasing temperature at 0 ppm boron concentration,
there will be no adverse criticality effects. Additionally, the normal
makeup sources to the SFP will continue to maintain adequate inventory
and flow capacity (150 gallons per minute or gpm) to compensate for
evaporative losses due to boiling (<112 gpm="" maximum).="" the="" temperature="" effects="" of="" sfp="" boiling="" on="" the="" sfp="" liner="" plate="" and="" concrete="" [[page="" 6995]]="" structure="" have="" been="" determined="" to="" be="" acceptable.="" therefore,="" the="" probability="" and="" consequences="" of="" a="" loss="" of="" sfp="" cooling="" event="" will="" not="" be="" significantly="" increased="" by="" the="" proposed="" fuel="" consolidation="" activity.="" (8)="" consolidation="" work="" station="" accidents.="" fuel="" consolidation="" will="" require="" additional="" fuel="" handling="" operations.="" however,="" since="" the="" fuel="" handling="" methods="" and="" equipment="" will="" not="" be="" significantly="" different="" from="" those="" currently="" used,="" consolidation="" work="" station="" accidents="" will="" be="" similar="" to="" fuel="" handling="" accidents="" already="" discussed="" in="" this="" safety="" analysis="" (dropped="" fuel="" assembly,="" dropped="" consolidated="" fuel="" canister,="" or="" other="" load="" drops).="" to="" avoid="" a="" significant="" increase="" in="" the="" probability="" of="" any="" of="" these="" accidents,="" personnel="" training="" methods,="" equipment="" design,="" and="" administrative="" controls="" will="" be="" utilized.="" administrative="" controls="" will="" require="" a="" minimum="" decay="" time="" of="" six="" months="" for="" spent="" fuel="" prior="" to="" its="" movement="" into="" the="" cask="" pool="" for="" consolidation.="" this="" restriction="" ensures="" that="" the="" limiting="" radiological="" offsite="" and="" control="" room="" dose="" consequences="" from="" a="" work="" station="" accident="" remain="" bounded="" by="" a="" fuel="" assembly="" drop.="" the="" results="" are="" well="" within="" (less="" than="" 25%="" of)="" 10="" cfr="" 100="" and="" meet="" gdc="" 19="" dose="" limits.="" fuel="" assemblies="" in="" the="" work="" station="" shall="" be="" separated="" by="" more="" than="" 12="" inches="" of="" water="" from="" edge="" to="" edge="" to="" maintain="" neutronic="" isolation="" (administrative="" control).="" the="" total="" spent="" fuel="" which="" will="" be="" permitted="" in="" the="" cask="" pool="" at="" any="" given="" time="" is="" 553="" fuel="" rods="" (administrative="" control).="" this="" quantity="" of="" fuel="" is="" equivalent="" to="" two="" full="" songs="" 2="" or="" 3="" fuel="" assemblies="" plus="" a="" damaged="" fuel="" rod="" storage="" canister="" or="" basket="" containing="" up="" to="" 81="" fuel="" rods.="" a="" criticality="" analysis="" has="" shown="" that,="" in="" the="" worst="" case="" scenario,="" at="" 1800="" ppm="" (technical="" specification="" limit="" of="" 1850="" ppm="" includes="" 50="" ppm="" measurement="" uncertainty)="" boron="" concentration,="" k-eff="" will="" be="" below="" 0.95.="" additional="" administrative="" controls="" will="" be="" imposed="" to="" ensure="" that="" a="" minimum="" of="" 400="" fuel="" rods="" or="" non-fuel="" rods="" will="" be="" loaded="" into="" a="" songs="" 2="" or="" songs="" 3="" consolidated="" fuel="" canister="" and="" a="" minimum="" of="" 324="" fuel="" rods="" or="" non-fuel="" rods="" will="" be="" loaded="" into="" a="" songs="" 1="" consolidated="" fuel="" canister.="" the="" canisters="" shall="" be="" designed="" for="" storage="" of="" fuel="" rods="" within="" a="" maximum="" allowed="" rod="" pitch.="" for="" canisters="" not="" fully="" loaded,="" the="" rod="" pitch="" shall="" be="" maintained="" by="" restraints="" inserted="" within="" the="" canister="" to="" ensure="" against="" rod="" displacement="" during="" canister="" movement="" (administrative="" control).="" these="" limitations="" ensure="" that="" the="" k-eff="" for="" a="" loaded="" consolidated="" fuel="" canister="" will="" not="" exceed="" 0.95="" with="" zero="" ppm="" boron="" concentration,="" considering="" worst="" case="" pitch="" between="" consolidated="" rods.="" with="" 1800="" ppm="" boron="" concentration="" in="" the="" pool,="" k-eff="" will="" be="" below="" 0.88="" for="" the="" worst="" case="" canister="" pitch="" between="" rods.="" thus,="" there="" are="" no="" adverse="" criticality="" consequences="" since="" the="" minimum="" number="" of="" rods="" consolidated="" in="" a="" canister="" is="" administratively="" controlled="" and="" sfp="" and="" cask="" pool="" boron="" concentration="" will="" be="" maintained="" at="" or="" above="" 1800="" ppm="" during="" consolidation.="" therefore,="" the="" consequences="" of="" a="" consolidation="" work="" station="" accident="" are="" not="" significantly="" increased="" as="" a="" result="" of="" the="" proposed="" fuel="" consolidation="" activity.="" (9)="" seismic="" events.="" the="" probability="" of="" occurrence="" of="" a="" seismic="" event="" is="" unaffected="" by="" the="" proposed="" fuel="" consolidation="" activity.="" the="" consequences="" of="" a="" design="" basis="" earthquake="" (dbe)="" have="" been="" analyzed,="" and="" the="" fuel="" consolidation="" process="" and="" consolidated="" fuel="" canisters="" will="" not="" affect="" the="" ability="" of="" the="" racks="" to="" maintain="" their="" required="" design="" basis="" function="" during="" and="" after="" a="" dbe.="" the="" spent="" fuel="" racks="" are="" designed,="" and="" the="" consolidated="" fuel="" canisters="" will="" be="" designed,="" to="" seismic="" category="" i="" requirements,="" and="" the="" consolidation="" equipment="" will="" be="" designed="" to="" seismic="" category="" ii/i="" requirements="" as="" defined="" by="" nrc="" regulatory="" guide="" 1.29,="" revision="" 3.="" the="" consolidation="" process="" provides="" the="" capability="" to="" store="" more="" spent="" fuel="" (up="" to="" approximately="" 2867="" fuel="" assemblies)="" than="" previously="" approved="" by="" the="" nrc="" (up="" to="" 1542="" fuel="" assemblies)="" in="" the="" sfp.="" the="" fuel="" handling="" building="" and="" the="" sfp="" and="" cask="" pool="" structures="" have="" been="" evaluated="" for="" the="" increased="" loading="" from="" fully-loaded="" consolidated="" fuel="" canisters="" and="" the="" loads="" found="" to="" be="" within="" the="" design="" allowables.="" thus,="" the="" probability="" or="" consequences="" of="" a="" seismic="" event="" are="" not="" significantly="" increased="" by="" the="" proposed="" fuel="" consolidation="" activity.="" (10)="" consolidated="" fuel="" canister="" stuck="" in="" a="" spent="" fuel="" rack.="" the="" probability="" of="" a="" consolidated="" fuel="" canister="" being="" stuck="" in="" a="" spent="" fuel="" rack="" is="" not="" known="" from="" experience="" since="" fuel="" consolidation="" demonstration="" projects="" conducted="" to="" date="" have="" not="" reported="" this="" type="" of="" occurrence.="" however,="" the="" canisters="" will="" be="" designed="" to="" be="" handled="" by="" the="" spent="" fuel="" handling="" machine="" (sfhm),="" will="" have="" the="" same="" approximate="" cross-sectional="" dimensions="" as="" spent="" fuel="" assemblies,="" and="" similar="" handling="" equipment="" and="" methods="" will="" be="" used.="" therefore,="" the="" failure="" mechanisms="" are="" expected="" to="" be="" comparable="" to="" those="" for="" a="" stuck="" fuel="" assembly.="" on="" this="" basis,="" the="" probability="" of="" a="" consolidated="" fuel="" canister="" being="" stuck="" in="" a="" spent="" fuel="" rack="" is="" estimated="" to="" be="" comparable="" to="" that="" for="" a="" stuck="" fuel="" assembly.="" the="" canisters="" will="" be="" designed="" to="" accommodate="" all="" operational="" and="" handling="" loads.="" a="" design="" requirement="" will="" be="" imposed="" that="" the="" canisters="" be="" capable="" of="" withstanding="" the="" maximum="" sfhm="" lift="" load="" of="" 6000="" pounds="" and="" remain="" intact="" with="" no="" fuel="" spillage.="" this="" is="" consistent="" with="" the="" criteria="" utilized="" previously="" during="" sfp="" reracking="" for="" the="" spent="" fuel="" racks="" and="" a="" jammed="" fuel="" assembly.="" with="" these="" design="" criteria="" and="" restrictions,="" deformation="" of="" rack="" cell="" geometry="" would="" not="" be="" sufficient="" to="" exceed="" the="" criticality="" acceptance="" criterion="">112>0.95).
Therefore, the consequences of a stuck consolidated fuel canister would
be bounded by the consequences of a stuck fuel assembly.
Therefore, there is no significant increase in the probability or
consequences of an accident previously evaluated due to the proposed
fuel consolidation activity.
(11) Limiting Component Cooling Water (CCW) System Heat Load
Effects on Spent Fuel Pool Cooling. The maximum calculated heat load
for the CCW system occurs during a Loss of Coolant Accident (LOCA). The
probability of a LOCA, and therefore the probability of maximum heat
load being imposed on the CCW system, is not affected by fuel
consolidation. The reason is that spent fuel handling operations in the
SFP or the cask pool are not, of themselves, LOCA initiators. For the
purposes of assessing the heat load on the CCW system, the LOCA is
divided into two phases, ``safety injection'' and ``recirculation.''
During the safety injection phase, the SFP heat load is isolated
from the CCW system. During the recirculation phase, CCW system cooling
to the SFP may be reestablished manually. The recirculation phase
represents the highest design heat load for the CCW system. Considering
the limiting consolidated fuel heat load contribution from the SFP
(assuming a minimum of 60 days decay of the most recent half-core
discharged into the SFP), the CCW system has adequate capacity to still
remove its design basis heat load.
Therefore, the probability or consequences of a limiting design
basis heat load event on the CCW system are not significantly increased
by the proposed fuel consolidation activity.
Therefore, operation of the facility in accordance with this
proposed change will not involve a significant increase in the
probability or consequences of an accident previously evaluated.
2. The proposed change does not create the possibility of a new or
[[Page 6996]]
different kind of accident from any accident previously evaluated.
The proposed change will allow the consolidation of San Onofre
Units 1, 2 and 3 spent fuel in canisters and the storage of these
canisters along with fuel assemblies in the Units 2 and 3 spent fuel
pools. Fuel consolidation is similar in nature to fuel reconstitution
within a fuel assembly since individual rods are manipulated in both
processes. Accidents involving consolidated fuel canisters are similar
in nature to fuel assembly handling accidents since both use similar
fuel handling processes and equipment. Administrative controls will be
instituted to provide assurance that postulated events involving
consolidated fuel will be enveloped by the spectrum of design basis
fuel handling accidents. Furthermore, heavy load drops during spent
fuel handling operations are accidents that have been previously
evaluated. Additional evaluations have been performed to demonstrate
that when the minimum boron concentration requirements of the Technical
Specifications have been met, the criticality criterion is satisfied
for all postulated accidents.
Therefore, operation of the facility in accordance with the
proposed change will not create the possibility of a new or different
kind of accident from any accident previously evaluated.
3. The proposed change does not involve a significant reduction in
a margin of safety.
The issue of ``margin of safety,'' when applied to spent fuel
consolidation and storage, includes the following areas:
(1) Nuclear criticality,
(2) Thermal-hydraulics,
(3) Mechanical, material and structural aspects, and
(4) Offsite doses.
These four areas are addressed below.
(1) Nuclear Criticality. The margin of safety that has been
established for nuclear criticality is that, including all
uncertainties, there is a 95% probability at a 95% confidence level
that the effective neutron multiplication factor (k-eff) in spent fuel
pools shall be less than or equal to 0.95, under all normal and
postulated accident conditions. This margin of safety has been adhered
to in the criticality analyses for fuel consolidation and the storage
of consolidated fuel canisters.
Criticality of fuel assemblies and consolidated fuel canisters in
fuel storage racks is prevented by the rack design which precludes
interactions between two fuel assemblies or two consolidated fuel
canisters or between a fuel assembly and a consolidated fuel canister.
This is accomplished by fixing the minimum separation between storage
cells containing fuel assemblies or consolidated fuel canisters, using
Boraflex, a neutron absorbing material, and utilizing strict
administrative controls.
During the consolidation process, fuel rods which cannot be
consolidated will be placed in a damaged fuel rod canister or basket.
Fuel assemblies, consolidated fuel canisters, and damaged fuel rod
canisters or baskets moving to and from the consolidation work station
or present in the work station shall be separated by more than 12
inches of water, measured edge to edge, to ensure that they are
neutronically isolated (administrative control). The total spent fuel
which will be permitted in the cask pool at any give time is 553 fuel
rods (administrative control). This quantity of fuel is equivalent to
two full SONGS 2 or 3 spent fuel assemblies plus 81 fuel rods in a
damaged fuel rod canister or basket. Additionally, the rod pitch inside
partially loaded canisters shall be maintained by restraints inserted
within the canister to ensure against rod displacement during canister
movement (administrative control).
The analytical methods utilized in the criticality analyses conform
with American National Standards Institute (ANSI) Standard N18.2-1973,
``Nuclear Safety Criteria for the Design of Stationary Pressurizer
Water Reactor Plants,'' Section 5.7, Fuel Handling Systems; ANSI
Standard 57.2-1983, ``Design Objectives for LWR Spent Fuel Storage
Facilities at Nuclear Power Stations,'' Section 6.4.2; ANSI Standard
N16.9-1975, ``Validation of Calculational Methods for Nuclear
Criticality Safety;'' NRC Standard Review Plan (NUREG-0800), Section
9.1.2, ``Spent Fuel Storage''; and the NRC guidance, ``OT Position for
Review and Acceptance of Spent Fuel Storage and Handling
Applications,'' (April 1978), as modified (January 1979).
The criticality analyses performed for normal conditions assume
zero boron concentration in the SFP water and worst-case fuel
enrichments and burnups. Most credible accident conditions will not
result in an increase in k-eff of the spent fuel racks. However,
accidents, such as a heavy load drop, misloading a consolidated fuel
canister or dropping a fuel assembly, can be postulated to increase
reactivity. For these accident conditions, the double contingency
principle of ANSI N16.1-1975 is applied. This principle states that it
is not required to assume two unlikely, independent events to ensure
protection against a criticality accident. Therefore, for accident
conditions, the presence of soluble boron in the storage pool water can
be assumed as a realistic initial condition since the absence of boron
would be the second unlikely event.
Worst case accident analyses have been performed that show that
1800 ppm of soluble boron will maintain the spent fuel pool and cask
storage pool k-eff less than 0.95, including uncertainties, at the
required 95%/95% probability/confidence level.
(2) Thermal-Hydraulics. The relevant thermal-hydraulics
considerations for determining if there is significant reduction in a
margin of safety are: (1) maximum fuel temperature, and (2) increase in
temperature of the water in the pool, and (3) increase in heat load
rejection to the environment.
Similar to the criticality analysis, the SFP decay heat load
calculation assumes worst-case fuel loading, enrichment, and burnup.
The calculation uses the same methodology as that used for the original
decay heat analysis. Standard Review Plan (SRP) Section 9.1.3 criteria
for maximum normal and maximum abnormal heat load conditions were used
in this evaluation.
The effect of the increased heat load has been evaluated and it has
been shown that, under the SRP maximum normal heat load, the existing
spent fuel pool cooling system will maintain the bulk pool water
temperature below 145 deg.F. This value considers a single active
failure of one spent fuel pool cooling system pump, coincident with a
loss of offsite power, and is consistent with Standard Review Plan,
Section 9.1.3.III.1.d. The 145 deg.F temperature represents a small
increase in the currently approved SFP temperature of 140 deg.F.
However, this temperature limit was very conservatively calculated,
considering only heat losses through the spent fuel pool heat
exchangers, and conservatively neglecting losses through evaporation to
the spent fuel pool area, as well as conduction to the fuel handling
building structure mass. This increase in spent fuel pool temperature
does not represent a significant reduction in the margin of safety,
since the affected portions of the spent fuel pool cooling system and
other important to safety equipment in the fuel handling building are
qualified for this slightly higher temperature and will still perform
the necessary safety functions when required.
A thermal-hydraulic analysis has been performed which shows that
the maximum local water temperatures along the fuel channels will
remain below the nucleate boiling condition values, even with the
maximum postulated flow blockage (80%) of the consolidated fuel
canisters. The
[[Page 6997]]
maximum calculated fuel cladding temperature for the design basis
condition is 233.1 deg.F, which is well below the anticipated maximum
cladding temperature of 700 deg.F during full power operation of the
reactor.
SONGS 2 and 3 conduct refueling by offloading either half the core
or the full core. The full core offload refueling provides the greater
of the two heat loads. Therefore, in addition to the SRP criteria, the
heat load during refueling operations was also evaluated. For this case
the heat load was evaluated assuming a two year refueling cycle, the
spent fuel pool completely filled with consolidated fuel (except for
the last core offload), and the full core offloaded at 150 hours of
decay. Under these conditions, a single SFP cooling pump with two heat
exchangers will maintain the SFP temperature below 160 deg.F, assuming
the component cooling water temperature is 88 deg.F and the ocean water
temperature is 76 deg.F. Thus, the SFP cooling system meets the single
active failure criterion for the maximum refueling heat load condition.
With the postulated SRP maximum abnormal heat load, the bulk pool
temperature will reach a maximum of 160 deg.F with two pumps and two
heat exchangers in operation. This maximum temperature is well below
the SRP maximum temperature limit of 212 deg.F. Also, according to the
SRP guidance, a single active failure need not be considered for the
maximum abnormal heat load case.
The shutdown cooling system (SDCS), if available, can be used as an
alternate heat dissipation path for cooling the SFP. The SDCS has been
evaluated for the maximum normal and maximum abnormal heat loads and it
has been determined that the system and interconnecting ties are
adequate to maintain the SFP temperature below 145 deg.F for the
maximum normal heat load and below 160 deg.F for the maximum abnormal
heat load. Since the maximum abnormal heat load bounds the maximum
refueling heat load, there is no need to evaluate the SDCS for the
maximum refueling heat load. For the maximum refueling heat load, the
SDCS does not meet the single failure criterion for SFP cooling;
however, the use of the SDCS for SFP cooling during Modes 5 and 6 of
plant operation has previously been evaluated and considered acceptable
by the NRC.
The heat load rejection to the environment will only increase by
approximately 0.03%.
Thus, there is no significant reduction in a margin of safety, as
determined by thermal-hydraulics considerations.
(3) Mechanical, material, and structural aspects. The main safety
function of the spent fuel pool and the storage racks is to maintain
the spent fuel assemblies and consolidated fuel canisters in a safe
configuration through normal and/or abnormal loadings. Abnormal loads
include an earthquake, impact due to a cask drop, drop of a spent fuel
assembly or consolidated fuel canister, or drop of a heavy load
including a spent fuel pool gate. The mechanical, material, and
structural design of the consolidation work station and consolidated
fuel canisters will be in accordance with the applicable portions of
the ``NRC OT Position of Review and Acceptance of Spent Fuel Storage
and Handling Applications'' and other applicable NRC guidance and
industry codes. The canisters will be designed to Seismic Category I
requirements, and the consolidation equipment will be analyzed and
either restrained or anchored as appropriate to meet Seismic Category
II/I requirements as defined by NRC Regulatory Guide 1.29, Revision 3.
The consolidation work station and consolidated fuel canister materials
will be compatible with the spent fuel rods and spent fuel assemblies,
and the spent fuel pool water chemistry. Therefore, margins of safety
relative to mechanical, material, and structural aspects of the
proposed fuel consolidation activities will not be significantly
reduced.
(4) Offsite and Control Room Doses. The offsite and control room
dose consequences of accidents involving consolidated fuel canisters or
fuel consolidation activities were evaluated. To determine the
radiological consequences, all credible accidents related to fuel
consolidation activities were considered. The analyses assume that
spent fuel has decayed a minimum of 6 months prior to commencing the
consolidation process.
The limiting accident for fuel consolidation is a 74-inch drop of a
consolidated fuel canister from the Spent Fuel Handling Machine (SFHM)
onto a rack cell containing a consolidated fuel canister. Although both
consolidated fuel canisters would remain intact, it is conservatively
assumed that all 944 fuel rods within the two canisters (472 rods/
canister x 2 canisters) are damaged. The resultant release of
radioactivity, after escaping from the spent fuel pool, is exhausted
from the fuel handling building (FHB) over a two-hour period; no credit
for FHB isolation system or FHB filters was taken.
The results demonstrate that, with a minimum decay time of 6 months
and no credit taken for isolation or filtration, the radiological
consequences of the worst case consolidated fuel accident would not
result in releases that would exceed 25% of the 10 CFR 100 limits. The
results also demonstrate that the control room doses would meet the 10
CFR 50, Appendix A, GDC 19 limits when crediting the control room
emergency air cleanup system.
Therefore, operation of the facility according to this proposed
change will not involve a significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment requests involve no significant hazards consideration.
Local Public Document Room location: Main Library, University of
California, Irvine, California 92713.
Attorney for licensee: T.E. Oubre, Esquire, Southern California
Edison Company, P.O. Box 800, Rosemead, California 91770.
NRC Project Director: William H. Bateman.
Southern California Edison Company, et al., Docket Nos. 50-361 and 50-
362, San Onofre Nuclear Generating Station, Unit Nos. 2 and 3, San
Diego County, California
Date of amendment requests: January 24, 1997.
Description of amendment requests: The licensee proposes to revise
Surveillance Requirement 3.8.1.9 to Technical Specification 3.8.1, ``AC
Sources--Operating.'' This change will revise the surveillance
requirement to more accurately reflect safety analysis conditions.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed change does not involve a significant increase in
the probability or consequences of an accident previously evaluated.
The proposed change would revise Surveillance Requirement (SR)
3.8.1.9 to more clearly reflect test conditions and be in greater
agreement with NUREG 1432.
The Voltage and Frequency limits are made tighter, to accurately
reflect plant design requirements. Discussion regarding reactive power
loading is eliminated from the SR, consistent with the wording of NUREG
1432, Rev. 1, and added to the Bases.
[[Page 6998]]
Operation of the facility would remain unchanged as a result of the
proposed changes and no assumptions or results of any accident analyses
are affected. Therefore, the proposed change will not involve a
significant increase in the probability or consequences of any accident
previously evaluated.
2. The proposed change does not create the possibility of a new or
different kind of accident from any accident previously evaluated.
The proposed change would revise Surveillance Requirement (SR)
3.8.1.9 to more clearly reflect test conditions and be in greater
agreement with NUREG 1432.
Operation of the facility would remain unchanged as a result of the
proposed change. Therefore, the proposed change will not create the
possibility of a new or different kind of accident from any accident
previously evaluated.
3. The proposed change does not involve a significant reduction in
a margin of safety.
The proposed change would revise Surveillance Requirement (SR)
3.8.1.9 to more clearly reflect test conditions and be in greater
agreement with NUREG 1432. The Voltage and Frequency limits are made
more restrictive, to accurately reflect the assumptions made in the
SONGS accident analysis. Consequently, no reduction in any margin to
safety exists.
Therefore, the proposed change will not involve a significant
reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment requests involve no significant hazards consideration.
Local Public Document Room location: Main Library, University of
California, Irvine, California 92713.
Attorney for licensee: T.E. Oubre, Esquire, Southern California
Edison Company, P.O. Box 800, Rosemead, California 91770.
NRC Project Director: William H. Bateman.
Southern Nuclear Operating Company, Inc., Docket Nos. 50-348 and 50-
364, Joseph M. Farley Nuclear Plant (Farley), Units 1 and 2, Houston
County, Alabama
Date of amendments request: December 31, 1997.
Description of amendments request: The proposed amendments would
revise the Technical Specifications to change the nuclear
instrumentation system intermediate range neutron flux reactor trip
setpoint and allowable value.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. The proposed in Intermediate Range reactor trip setpoint from
25% RTP [rated thermal power] to 35% RTP, the associated allowable
value change, and the deletion of the redundant references to the IR
[intermediate range] high flux and PR [power range] high flux low
setpoints do not involve a significant increase in the probability or
consequences of an accident previously evaluated in the Farley FSAR
[Final Safety Analysis Report]. The IR reactor trip neither causes any
accident nor provides primary protection for any accident in the Farley
FSAR. No new accident initiators have been identified because of this
proposed revision. No new performance requirements for any system that
is used to mitigate dose consequences have been imposed by this
proposed change. No input assumption to any dose consequence
calculation is affected by this proposed change. All previously
reported dose consequences remain bounding. Therefore, the radiological
consequences to the public resulting from any accident previously
evaluated in the FSAR have not significantly increased.
2. The proposed Technical Specifications change to the IR reactor
trip setpoint, associated allowable value change, and the deletion of
the redundant references to the IR high flux and PR high flux low
setpoints do not create the possibility of a new or different kind of
accident from any previously evaluated in the FSAR. No new accident
scenarios, failure mechanisms or limiting single failures are
introduced as a result of the increase in IR setpoint from 25% RTP to
35% RTP. No new challenges to the safety-related Reactor Trip System
have been identified. The NIS [nuclear instrument system] hardware has
not been modified, and Farley will continue to perform periodic IR
channel calibration and surveillance in accordance with Technical
Specifications. All previously identified accident scenarios remain
bounding since the IR trip setpoint provides no primary accident
protection. Therefore, the possibility of a new or different kind of
accident is not created.
3. The proposed increase in the IR reactor trip setpoint from 25%
RTP to 35% RTP, the associated allowable value change, and the deletion
of the redundant references to the IR high flux and PR high flux low
setpoints do not involve a significant reduction in the margin of
safety. All previously established acceptance limits continue to be met
for all events, since the IR trip does not provide any primary
protective action for any accident scenario. Changing the IR setpoint
and allowable value will not invalidate its backup function. There are
no physical modifications required for the protection system. This
change will not affect the operation of any other safety-related
equipment. Farley-specific setpoint uncertainty calculations support
the setpoint change. Since all acceptance limits continue to be met,
there is no significant reduction in the margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Houston-Love Memorial Library,
212 W. Burdeshaw Street, Post Office Box 1369, Dothan, Alabama 36302.
Attorney for licensee: M. Stanford Blanton, Esq., Balch and
Bingham, Post Office Box 306, 1710 Sixth Avenue North, Birmingham,
Alabama.
NRC Project Director: Herbert N. Berkow.
Southern Nuclear Operating Company, Inc., Georgia Power Company,
Oglethorpe Power Corporation, Municipal Electric Authority of Georgia,
City of Dalton, Georgia, Docket Nos. 50-424 and 50-425, Vogtle Electric
Generating Plant, Units 1 and 2, Burke County, Georgia
Date of amendment request: January 22, 1998. The application
supersedes, in its entirety, the application dated September 13, 1996.
Description of amendment request: The proposed application would
change the Vogtle Electric Generating Plant (VEGP) Technical
Specification (TS) 3.8.1, ``AC Sources--Operating,'' as follows: (1)
The completion time for restoration of one required offsite circuit
would be increased from 6 to 14 days from discovery of failure to meet
the Limiting Condition for Operation (LCO); (2) a new required action
B.2 would be added along with the existing Condition B required actions
for one Diesel Generator (DG) inoperable, to verify the availability of
the Standby Auxiliary
[[Page 6999]]
Transformer (SAT) within 1 hour and once per 12 hours thereafter, and
restore the DG to operable status within 14 days from discovery of
failure to meet the LCO; (3) a new required action B.5.1 would be added
to verify that the combustion turbine electrical power generation
capability of Plant Wilson is functional and sufficiently reliable to
provide assurance of black-start generation capability within 72 hours
of entry into Condition B or within 72 hours prior to entry into
Condition B; (4) a new required action B.5.2 would be added for
utilization when the combined combustion turbine generator (CTG)
enhanced black start reliability falls below the required criteria.
This condition allows the option to start or run at least one of the
CTGs at Plant Wilson within 72 hours of entry to Condition B, or prior
to entry into Condition B for preplanned maintenance; (5) a new
condition C is being added for when one DG is inoperable and the
required actions and completion times of B.2 are not met, i.e. the SAT
is not verified to be available or becomes unavailable as an offsite
source, or the required actions and completion times of B.5 associated
with CTG operation and/or reliability are not met, then restore the DG
to operable status within 72 hours; and (6) other changes associated
with TS 3.8.1 conditions, required actions, or completion times are
only the result of re-numbering due to the addition of the new
condition and required actions of the DG extended Allowable Out-of-
Service Time (AOT) and do not reflect a change to operating
requirements.
In addition, a new TS 5.5.18, ``Configuration Risk Management
Program (CRMP),'' would be added to the Administrative section of the
TS. This section discusses the program description and use.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration, which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
No. The DGs are used to support mitigation of the consequences of
an accident; however, they are not considered the initiator of any
previously analyzed accident. The use of the SAT as an additional
offsite power source coupled with the black start generation capability
of Plant Wilson and the use of a configuration risk management program
will more than compensate for the risk introduced by the extended DG
Completion Times. As such, the extension of the DG Completion Times
will not significantly increase the probability or consequences of any
accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
No. The proposed change does not introduce a new mode of plant
operation and does not involve a physical modification to the plant.
Therefore, it does not create the possibility of a new or different
kind of accident from any accident previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
No. This proposed TS only affects the length of the allowed outage
time for DGs and does not change the DG testing or maintenance
requirements. The proposed TS still requires the DGs to be maintained
Operable to the same standard as before. The use of the SAT as an
additional offsite power source coupled with the black start generation
capability of Plant Wilson and the use of a configuration risk
management program has been shown to provide more than adequate
compensation for the potential risk of the extended DG Completion
times. The proposed change in DG completion times in conjunction with
the added availability of the SAT, continue to provide adequate
assurance of the capability to provide power to the ESF [Engineered
Safety Features] buses. Therefore, the proposed change does not involve
a significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Burke County Public Library,
412 Fourth Street, Waynesboro, Georgia.
Attorney for licensee: Mr. Arthur H. Domby, Troutman Sanders,
NationsBank Plaza, Suite 5200, 600 Peachtree Street, NE., Atlanta,
Georgia.
NRC Project Director: Herbert N. Berkow.
Tennessee Valley Authority, Docket Nos. 50-259, 50-260, and 50-296,
Browns Ferry Nuclear Plant, Units 1, 2, and 3, Limestone County,
Alabama
Date of amendment request: December 30, 1997.
Description of amendment request: The proposed amendment would
change Table 3.5-1 and associated notes. The changes would remove a
potential non-conservative operating configuration for the Residual
Heat Removal Service Water (RHRSW) System pumps that could result in a
loss of two pumps following a single failure of diesel-generator A or B
thereby reducing the number of pumps available to less than the number
required by the Final Safety Analysis Report. The changes also would
allow (for units with fuel loaded) reducing the minimum-required number
of RHRSW pumps by one pump for each unit that has been in cold shutdown
for more than 24 hours. The associated Basis 3.5 also would be changed
to reflect these changes.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration. The NRC staff has reviewed the licensee's analysis
against the standards of 10 CFR 50.92(c). The NRC staff's review is
presented below.
A. The changes do not involve a significant increase in the
probability or consequences of an accident previously evaluated (10 CFR
50.92(c)(1)) because the proposed changes do not involve any plant
structures, systems, or components that are initiators of any accident
previously evaluated, and the changes do not decrease the capability of
the RHRSW system to transfer reactor core and emergency equipment heat
loads to the ultimate heat sink.
B. The changes do not create the possibility of a new or different
kind of accident from any accident previously evaluated (10 CFR
50.92(c)(2)) because there are no changes to plant structures, systems,
or components, and the changes do not affect the manner by which the
facility is operated. The proposed changes are consistent with the
Final Safety Analysis Report analysis for the design basis accident.
C. The changes do not involve a significant reduction in a margin
of safety (10 CFR 50.92(c)(3)) because the proposed changes do not
affect the manner by which the facility is operated or involve
equipment or features which affect the operational characteristics of
the facility. The proposed amendment would increase the diversity of
power supplies associated with the residual heat removal cooling
function thereby improving conformance to the single failure criterion.
Based on this review, it appears that the three standards of 10 CFR
50.92(c) are satisfied. Therefore, the NRC staff
[[Page 7000]]
proposes to determine that the amendment request involves no
significant hazards consideration.
Local Public Document Room location: Athens Public Library, 405 E.
South Street, Athens, Alabama 35611.
Attorney for licensee: General Counsel, Tennessee Valley Authority,
400 West Summit Hill Drive, ET l0H, Knoxville, Tennessee 37902.
NRC Project Director: Frederick J. Hebdon.
Vermont Yankee Nuclear Power Corporation, Docket Nos. 50-271, Vermont
Yankee Nuclear Power Station, Windham County, Vermont
Date of amendment request: December 11, 1997.
Description of amendment request: The proposed amendment would
revise the safety limit minimum critical power ratio (SLMCPR) values
for Cycle 20 operation. The specific changes are:
(1) Page 6, Technical Specification 1.1A. replace the cycle number
(19) to (20) and the SLMCPR for Cycle 19 (1.10) with that for Cycle 20
(1.11).
(2) Page 6, Technical Specification 1.1A. replace the SLMCPR for
Cycle 19 single loop operation (1.12) with the Cycle 20 value (1.13).
Calculations for Vermont Yankee Nuclear Power Station (VYNPC) by
General Electric Company have determined that the current SLMCPR values
for single and dual loop operation contained in the Technical
Specifications (1.10 and 1.12) are not applicable to the upcoming fuel
cycle (Cycle 20) due to core loading design and fuel type changes. The
Cycle 20 values are 1.11 and 1.13.
Basis for proposed no significant hazards consideration
determination: As required by 10 CFR 50.91(a), the licensee has
provided its analysis of the issue of no significant hazards
consideration which is presented below:
1. Does the change involve a significant increase in the
probability or consequences of an accident previously evaluated?
The basis of the Safety Limit MCPR is to ensure no mechanistic fuel
damage is calculated to occur if the limit is not violated. The new
SLMCPR preserves the existing margin to transition boiling and the
probability of fuel damage is not increased. The derivation of the
revised SLMCPR for Vermont Yankee Cycle 20 for incorporation into the
Technical Specifications, and its use to determine cycle-specific
thermal limits, have been performed using NRC approved methods. These
calculations do not change the method of operating the plant and have
no effect on the probability of an accident initiating event or
transient.
Based on the above, VYNPC has concluded that the proposed change
will not result in a significant increase in the probability or
consequences of an accident previously evaluated.
2. Does the change create the possibility of a new or different
kind of accident from any accident previously evaluated?
The proposed changes result only from a specific analysis for the
Vermont Yankee Cycle 20 core reload design. These changes do not
involve any new method for operating the facility and do not involve
any facility modifications. No new initiating events or transients
result from these changes.
Based on the above, VYNPC has concluded that the proposed change
will not create the possibility of a new or different kind of accident
from those previously evaluated.
3. Does this change involve a significant reduction in a margin of
safety?
The margin of safety as defined in the Technical Specification
bases will remain the same. The new SLMCPR is calculated using NRC
approved methods which are in accordance with the current fuel design
and licensing criteria. Additionally, interim implementing procedures,
which incorporate cycle-specific parameters, have been used. The SLMCPR
remains high enough to ensure that greater than 99.9% of all fuel rods
in the core will avoid transition boiling if the limit is not violated,
thereby preserving the fuel cladding integrity.
As a result, VYNPC has concluded that the proposed change will not
result in a significant reduction in the margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on
this review, it appears that the three standards of 10 CFR 50.92(c) are
satisfied. Therefore, the NRC staff proposes to determine that the
amendment request involves no significant hazards consideration.
Local Public Document Room location: Brooks Memorial Library, 224
Main Street, Brattleboro, VT 05301.
Attorney for licensee: Ernest L. Blake, Jr., Esquire, Shaw,
Pittman, Potts and Trowbridge, 2300 N Street, NW., Washington, DC
20037.
NRC Project Director: Ronald Eaton.
Previously Published Notices of Consideration of Issuance of Amendments
to Facility Operating Licenses, Proposed No Significant Hazards
Consideration Determination, and Opportunity for a Hearing
The following notices were previously published as separate
individual notices. The notice content was the same as above. They were
published as individual notices either because time did not allow the
Commission to wait for this biweekly notice or because the action
involved exigent circumstances. They are repeated here because the
biweekly notice lists all amendments issued or proposed to be issued
involving no significant hazards consideration.
For details, see the individual notice in the Federal Register on
the day and page cited. This notice does not extend the notice period
of the original notice.
Florida Power Corporation, et al., Docket No. 50-302, Crystal River
Unit No. 3 Nuclear Generating Plant, Citrus County, Florida
Date of application for amendment: December 5, 1997.
Brief description of amendment: Revisions to the Crystal River Unit
3 design basis relating to starting logic of reactor building fan
coolers.
Date of publication of individual notice in the Federal Register:
January 15, 1998 (63 FR 2423).
Expiration date of individual notice: February 17, 1998
Local Public Document Room location: Coastal Region Library, 8619
W. Crystal River, Florida 34428.
Notice of Issuance of Amendments to Facility Operating Licenses
During the period since publication of the last biweekly notice,
the Commission has issued the following amendments. The Commission has
determined for each of these amendments that the application complies
with the standards and requirements of the Atomic Energy Act of 1954,
as amended (the Act), and the Commission's rules and regulations. The
Commission has made appropriate findings as required by the Act and the
Commission's rules and regulations in 10 CFR Chapter I, which are set
forth in the license amendment.
Notice of Consideration of Issuance of Amendment to Facility
Operating License, Proposed No Significant Hazards Consideration
Determination, and Opportunity for A Hearing in connection with these
actions was published in the Federal Register as indicated.
[[Page 7001]]
Unless otherwise indicated, the Commission has determined that
these amendments satisfy the criteria for categorical exclusion in
accordance with 10 CFR 51.22. Therefore, pursuant to 10 CFR 51.22(b),
no environmental impact statement or environmental assessment need be
prepared for these amendments. If the Commission has prepared an
environmental assessment under the special circumstances provision in
10 CFR 51.12(b) and has made a determination based on that assessment,
it is so indicated.
For further details with respect to the action see: (1) The
applications for amendment, (2) the amendment, and (3) the Commission's
related letter, Safety Evaluation and/or Environmental Assessment as
indicated. All of these items are available for public inspection at
the Commission's Public Document Room, the Gelman Building, 2120 L
Street, NW., Washington, DC, and at the local public document rooms for
the particular facilities involved.
Carolina Power & Light Company, Docket No. 50-261, H. B. Robinson Steam
Electric Plant, Unit No. 2, Darlington County, South Carolina
Date of application for amendment: October 2, 1997.
Brief description of amendment: The proposed change would revise
the Updated Final Safety Analysis Report to revise the credit assumed
for iodine decontamination by the spent fuel pool water during a
postulated fuel handling accident.
Date of issuance: January 27, 1998.
Effective date: January 27, 1998.
Amendment No.: 177.
Facility Operating License No. DPR-23: Amendment authorizes changes
to the facilitiy's Updated Final Safety Analysis Report.
Date of initial notice in Federal Register: November 19, 1997 (62
FR 61838). The Commission's related evaluation of the amendment is
contained in a Safety Evaluation dated January 27, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Hartsville Memorial Library,
147 West College Avenue, Hartsville, South Carolina 29550.
Commonwealth Edison Company, Docket Nos. STN 50-454 and STN 50-455,
Byron Station, Unit Nos. 1 and 2, Ogle County, Illinois, Docket Nos.
STN 50-456 and STN 50-457, Braidwood Station, Unit Nos. 1 and 2, Will
County, Illinois
Date of application for amendments: May 21, 1996, as supplemented
on November 18, 1997, December 3, 1997, January 8, 1998 and January 13,
1998.
Brief description of amendments: The amendments relocate the
reactor coolant system pressure and temperature limits for heatup,
cooldown, low-temperature operation and hydrostatic testing, and the
low-temperature overpresssure protection (LTOP) system setpoint curves
into a Pressure Temperature Limits Report (PTLR).
Date of issuance: January 23, 1998.
Effective date: Immediately, to be implemented within 60 days.
Amendment Nos.: 98, 98, 89, 89.
Facility Operating License Nos. NPF-37, NPF-66, NPF-72 and NPF-77:
The amendments revised the Technical Specifications.
Date of initial notice in Federal Register: December 18, 1997 (62
FR 66394). The January 8, 1998 and January 13, 1998, submittals
provided additional clarifying information that did not change the
initial proposed no significant hazards consideration determination.
The Commission's related evaluation of the amendments is contained
in a Safety Evaluation dated January 23, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: For Byron, the Byron Public
Library District, 109 N. Franklin, P.O. Box 434, Byron, Illinois 61010;
for Braidwood, the Wilmington Public Library, 201 S. Kankakee Street,
Wilmington, Illinois 60481.
Commonwealth Edison Company, Docket Nos. STN 50-454 and STN 50-455,
Byron Station, Unit Nos. 1 and 2, Ogle County, Illinois, Docket Nos.
STN 50-456 and STN 50-457, Braidwood Station, Unit Nos. 1 and 2, Will
County, Illinois
Date of application for amendments: January 30, 1997, as
supplemented by letter dated December 9, 1997. Additional information
was submitted in ComEd's letters of May 23, 1997, August 8, 1997 and
January 7, 1998.
Brief description of amendments: The amendments revise the
technical specifications and associated bases related to the primary
containment pressure and reactor coolant system volume. The changes
resulted from the replacement of the steam generators at Byron, Unit 1
and Braidwood, Unit 1.
Date of issuance: January 22, 1998.
Effective date: Immediately, to be implemented within 30 days.
Amendment Nos.: 97, 97, 88 and 88.
Facility Operating License Nos. NPF-37, NPF-66, NPF-72 and NPF-77:
The amendments revised the Technical Specifications.
Date of initial notice in Federal Register: April 23, 1997 (62 FR
19826) and December 19, 1997 (62 FR 66699).
The May 23, 1997, August 8, 1997, December 9, 1997 and January 7,
1998, letters provided additional information that did not change the
initial proposed no significant hazards consideration determination.
The Commission's related evaluation of the amendments is contained in a
Safety Evaluation dated January 22, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: For Byron, the Byron Public
Library District, 109 N. Franklin, P.O. Box 434, Byron, Illinois 61010;
for Braidwood, the Wilmington Public Library, 201 S. Kankakee Street,
Wilmington, Illinois 60481.
Commonwealth Edison Company, Docket Nos. STN 50-454 and STN 50-455,
Byron Station, Unit Nos. 1 and 2, Ogle County, Illinois, Docket Nos.
STN 50-456 and STN 50-457, Braidwood Station, Unit Nos. 1 and 2, Will
County, Illinois
Date of application for amendments: February 18, 1997, as
supplemented by letter dated September 22, 1997.
Brief description of amendments: The amendments change the
Technical Specification requirements for steam generator water level to
support steam generator replacement at Byron, Unit 1, and Braidwood,
Unit 1.
Date of issuance: January 15, 1998.
Effective date: Immediately, to be implemented within 30 days.
Amendment Nos.: 96, 96, 87 and 87.
Facility Operating License Nos. NPF-37, NPF-66, NPF-72 and NPF-77:
The amendments revised the Technical Specifications.
Date of initial notice in Federal Register: March 12, 1997 (62 FR
11491). The September 22, 1997, submittal provided additional
clarifying information that did not change the initial proposed no
significant hazards consideration determination.
The Commission's related evaluation of the amendments is contained
in a Safety Evaluation dated January 15, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: For Byron, the Byron Public
Library District, 109 N. Franklin, P.O. Box 434, Byron, Illinois 61010;
for Braidwood, the Wilmington Public Library, 201 S. Kankakee Street,
Wilmington, Illinois 60481.
[[Page 7002]]
Commonwealth Edison Company, Docket Nos. STN 50-454 and STN 50-455,
Byron Station, Unit Nos. 1 and 2, Ogle County, Illinois, Docket Nos.
STN 50-456 and STN 50-457, Braidwood Station, Unit Nos. 1 and 2, Will
County, Illinois
Date of application for amendments: June 17, 1997, as supplemented
November 26, 1997, and January 9, 1998.
Brief description of amendments: The amendments revise the
technical specifications to update the containment vessel structural
integrity surveillance requirements to meet the provisions of a recent
revision to 10 CFR 50.55a, and to relocate details of the surveillance
requirements to a licensee-controlled program.
Date of issuance: January 29, 1998.
Effective date: Effective immediately and shall be implemented
within 60 days.
Amendment Nos.: 99, 99, 90 and 90.
Facility Operating License Nos. NPF-37, NPF-66, NPF-72 and NPF-77:
The amendments revised the Technical Specifications.
Date of initial notice in Federal Register: December 19, 1997 (62
FR 66697). The November 26, 1997, and January 9, 1998, letters provided
additional clarifying information that did not change the staff's
initial proposed no significant hazards considerations determination.
The Commission's related evaluation of the amendments is contained in a
Safety Evaluation dated January 29, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: For Byron, the Byron Public
Library District, 109 N. Franklin, P.O. Box 434, Byron, Illinois 61010;
for Braidwood, the Wilmington Public Library, 201 S. Kankakee Street,
Wilmington, Illinois 60481.
Commonwealth Edison Company, Docket Nos. STN 50-454 and STN 50-455,
Byron Station, Unit Nos. 1 and 2, Ogle County, Illinois, Docket Nos.
STN 50-456 and STN 50-457, Braidwood Station, Unit Nos. 1 and 2, Will
County, Illinois
Date of application for amendments: September 8, 1997, as
supplemented on January 6, 1998.
Brief description of amendments: The amendments revise Technical
Specification (TS) 4.5.2.b.3 and the associated Bases to bring the
Byron, Unit 1, and Braidwood, Unit 1, requirements into conformance
with the Unit 2 requirements that were approved on August 13, 1997. The
revision adds a requirement to the Unit 1 TS Surveillance Requirements
for verifying that the Chemical and Volume Control (CV) System is full
of water every 31 days; to include ultrasonically examining the piping
at the CV206 valve for Byron, Unit 1 (CV207 valve for Braidwood, Unit
1), if the train B CV pump is idle. The revision also removes the
condition that the Unit 1 requirements will be applicable only until
the end of the current cycle (Unit 1-Cycle 8 for Byron, and Unit 1-
Cycle 7 for Braidwood). The amendments affect Unit 2 only in that the
units share common TS.
As an administrative action by the NRC that only involves the
format of the licenses and does not authorize any activities outside
the scope of the applications, the NRC has amended the Byron and
Braidwood operating licenses to include an Appendix C, ``Additional
Conditions,'' and added a license condition associated with the
proposed TS changes.
Date of issuance: January 30, 1998.
Effective date: Immediately, to be implemented within 30 days.
Amendment Nos.: 100, 100, 91 and 91.
Facility Operating License Nos. NPF-37, NPF-66, NPF-72 and NPF-77:
The amendments revised the Facility Operating Licenses and the
Technical Specifications.
Date of initial notice in Federal Register: November 5, 1997 (62 FR
59914). The January 6, 1998, submittal provided additional clarifying
information that did not change the initial proposed no significant
hazards consideration determination.
The Commission's related evaluation of the amendments is contained
in a Safety Evaluation dated January 30, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: For Byron, the Byron Public
Library District, 109 N. Franklin, P.O. Box 434, Byron, Illinois 61010;
for Braidwood, the Wilmington Public Library, 201 S. Kankakee Street,
Wilmington, Illinois 60481.
Commonwealth Edison Company, Docket Nos. 50-373 and 50-374, LaSalle
County Station, Units 1 and 2, LaSalle County, Illinois
Date of application for amendments: August 12, 1997.
Brief description of amendments: The amendments revise the LaSalle
County Station Technical Specifications by removing Surveillance
Requirement 4.7.1.3.c which requires that every 18 months all areas
within the lake screenhouse be inspected to ensure that sediment has
not been deposited to a depth greater than 1 foot.
Date of issuance: January 23, 1998.
Effective date: Immediately, to be implemented prior to restart
from L1F35 for Unit 1 and prior to restart from L2RO7 for Unit 2.
Amendment Nos.: 122 and 107.
Facility Operating License Nos. NPF-11 and NPF-18: The amendments
revised the Technical Specifications.
Date of initial notice in Federal Register: October 22, 1997 (62 FR
54870).
The Commission's related evaluation of the amendments is contained
in a Safety Evaluation dated January 23, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Jacobs Memorial Library,
Illinois Valley Community College, Oglesby, Illinois 61348.
Duquesne Light Company, et al., Docket Nos. 50-334 and 50-412, Beaver
Valley Power Station, Unit Nos. 1 and 2, Shippingport, Pennsylvania
Date of application for amendments: September 11, 1997.
Brief description of amendments: These amendments relocate the
reactor trip system and engineered safety feature actuation system
reponse times from Technical Specification (TS) Tables 3.3-2 and 3.3-5
to Section 3 of the Beaver Valley Power Station, Unit Nos. 1 and 2
Licensing Requirements Manual (LRM) in accordance with the guidance
provided in NRC Generic Letter 93-08. Neither the response time limits
nor the surveillance requirements for performing response time testing
are altered by these amendments. Any future changes to the LRM will be
controlled in accordance with the requirements of 10 CFR 50.59. These
amendments also make several editorial changes in TSs 3.3.1.1 and
3.3.1.2, as well as making conforming changes to the Bases for these
TSs.
Date of issuance: January 20, 1998.
Effective date: Both units, as of date of issuance, to be
implemented within 30 days.
Amendment Nos.: 210 and 88.
Facility Operating License Nos. DPR-66 and NPF-73: Amendments
revised the Technical Specifications and Appendices C (Unit No. 1) and
D (Unit No. 2) of the Licenses.
Date of initial notice in Federal Register: October 22, 1997 (62 FR
54871).
The Commission's related evaluation of the amendments is contained
in a Safety Evaluation dated January 20, 1998.
[[Page 7003]]
No significant hazards consideration comments received: No.
Local Public Document Room location: B. F. Jones Memorial Library,
663 Franklin Avenue, Aliquippa, PA 15001.
Florida Power Corporation, et al., Docket No. 50-302, Crystal River
Unit No. 3 Nuclear Generating Plant, Citrus County, Florida
Date of application for amendment: June 14, 1997, supplemented
August 4, September 2, 17, 25, November 5, 15, 19, 21, December 3, 5,
11, 24, 1997, January 15, and 22, 1998.
Brief description of amendment: Changes to Technical Specification
(TS) relating to small break loss of coolant accident mitigation,
emergency diesel generator (EDG) upgrade and EDG load rejection test
and steady state loads.
Date of issuance: January 24, 1998.
Effective date: January 24, 1998.
Amendment No.: 163.
Facility Operating License No. DPR-72: Amendment revised the TS.
Date of initial notice in Federal Register: October 8, 1997 (62 FR
52581). The letters dated August 4, September 2, 17, 25, November 5,
15, 19, 21, December 3, 5, 11, 24, 1997, and January 15, and 22, 1998,
provided clarifying information that did not change the initial no
significant hazards consideration determination.
The Commission's related evaluation of the amendment is contained
in a Safety Evaluation dated January 24, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Coastal Region Library, 8619
W. Crystal Street, Crystal River, Florida 32629.
Florida Power Corporation, et al., Docket No. 50-302, Crystal River
Unit No.3 Nuclear Generating Plant, Citrus County, Florida
Date of application for amendment: December 1, and 13, 1997 and
January 19, 1998.
Brief description of amendment: Revise License Condition 2.C.(5) to
delete the requirement relating to installation and testing of flow
indicators in the emergency core cooling system to provide indication
of 40 gallons per minute flow for boron dilution.
Date of issuance: January 27, 1998.
Effective date: January 27, 1998.
Amendment No.: 164.
Facility Operating License No. DPR-72: Amendment revises License
Condition 2.C.(5) and adds a new License Condition 2.C.11.
Date of initial notice in Federal Register: November 12, 1997 (62
FR 60733). Letters dated December 1 and 13, 1997 and January 19, 1998
provided supplemental information which did not affect the original no
significant hazards consideration determination.
The Commission's related evaluation of the amendment is contained
in a Safety Evaluation dated January 27, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Coastal Region Library, 8619
W. Crystal Street, Crystal River, Florida 32629.
Northeast Nuclear Energy Company, et al., Docket No. 50-423, Millstone
Nuclear Power Station, Unit No. 3, New London County, Connecticut
Date of application for amendment: November 14, 1997.
Brief description of amendment: The amendment changes Technical
Specification 4.5.2.d.1 to clarify the wording and increase the
setpoint for the open pressure interlock.
Date of issuance: January 23, 1998.
Effective date: As of the date of issuance, to be implemented
within 60 days.
Amendment No.: 156.
Facility Operating License No. NPF-49: Amendment revised the
Technical Specifications.
Date of initial notice in Federal Register: December 17, 1997 (62
FR 66138).
The Commission's related evaluation of the amendment is contained
in a Safety Evaluation dated January 23, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Learning Resources Center,
Three Rivers Community-Technical College, 574 New London Turnpike,
Norwich, Connecticut, and the Waterford Library, ATTN: Vince Juliano,
49 Rope Ferry Road, Waterford, Connecticut.
Omaha Public Power District, Docket No. 50-285, Fort Calhoun Station,
Unit No. 1, Washington County, Nebraska
Date of amendment request: January 9, 1995, as supplemented by
letters dated October 17, 1996, and January 26, 1998.
Brief description of amendment: The amendment revises the technical
specifications by deleting toxic gas monitoring requirements for all
chemicals except ammonia. The monitoring requirements for ammonia will
remain in the technical specifications.
Date of issuance: January 26, 1998.
Effective date: January 26, 1998.
Amendment No.: 183.
Facility Operating License No. DPR-40: Amendment revised the
Technical Specifications.
Date of initial notice in Federal Register: March 1, 1995 (60 FR
11137).
The October 17, 1996, and January 26, 1998, supplemental letters
provided additional clarifying information and did not change the
staff's original no significant hazards consideration determination.
The Commission's related evaluation of the amendment is contained in a
Safety Evaluation dated January 26, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: W. Dale Clark Library, 215
South 15th Street, Omaha, Nebraska 68102.
Philadelphia Electric Company, Docket No. 50-352, Limerick Generating
Station, Unit 1, Montgomery County, Pennsylvania
Date of application for amendment: October 24, 1997.
Brief description of amendment: This amendment changes Sections
3.1.3.6 and 4.1.3.6 of the Unit 1 Technical Specifications to allow
operation of control rod 50-27, uncoupled from its driver, for the
remainder of Cycle 7. The amendment specifies conditions under which
control rod 50-27 may be operated and modifies existing surveillance
requirements to verify control rod position by use of neutron
instrumentation.
Date of issuance: January 16, 1998.
Effective date: As of the date of issuance, to be implemented
within 30 days.
Amendment No.: 124.
Facility Operating License No. NPF-39: This amendment revised the
Technical Specifications.
Date of initial notice in Federal Register: November 19, 1997 (62
FR 61844).
The Commission's related evaluation of the amendment is contained
in a Safety Evaluation dated January 16, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Pottstown Public Library, 500
High Street, Pottstown, PA 19464.
Power Authority of the State of New York, Docket No. 50-286, Indian
Point Nuclear Generating Unit No. 3, Westchester County, New York
Date of application for amendment: September 8, 1997, as
supplemented November 3, 1997.
[[Page 7004]]
Brief description of amendment: The requested amendment modifies
the f(I) function. The f(delta I) function is defined in the
TS as a function of the indicated difference between the top and bottom
detectors of the power range nuclear ion chambers. This function is
used in the calculation of the overtemperature delta T (OTdelta T)
reactor trip.
Date of issuance: January 26, 1998.
Effective date: As of the date of issuance to be implemented within
30 days.
Amendment No.: 177.
Facility Operating License No. DPR-64: Amendment revised the
Technical Specifications.
Date of initial notice in Federal Register: October 22, 1997 (62 FR
54876). The November 3, 1997, letter provided clarifying information
that did not change the initial proposed no significant hazards
consideration.
The Commission's related evaluation of the amendment is contained
in a Safety Evaluation dated January 26, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: White Plains Public Library,
100 Martine Avenue, White Plains, New York 10601.
Attorney for licensee: Mr. David E. Blabey, 10 Columbus Circle, New
York, New York 10019.
NRC Project Director: S. Singh Bajwa.
Public Service Electric & Gas Company, Docket No. 50-272, Salem Nuclear
Generating Station, Unit No. 1, Salem County, New Jersey
Date of application for amendment: December 11, 1997.
Brief description of amendment: The amendment provides a one-time
change to the Technical Specifications to allow purging of the
containment during Modes 3 (Hot Standy) and 4 (Hot Shutdown) upon the
return to power from the current refueling outage (1R13).
Date of issuance: January 29, 1998.
Effective date: As of the date of issuance, to be implemented
within seven days.
Amendment No.: 206.
Facility Operating License No. DPR-70: This amendment revised the
Technical Specifications.
Date of initial notice in Federal Register: December 18, 1997 (62
FR 66397).
The Commission's related evaluation of the amendment is contained
in a Safety Evaluation dated January 29, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Salem Free Public Library, 112
West Broadway, Salem, NJ 08079.
Public Service Electric & Gas Company, Docket Nos. 50-272 and 50-311,
Salem Nuclear Generating Station, Unit Nos. 1 and 2, Salem County, New
Jersey
Date of application for amendments: October 21, 1997.
Brief description of amendments: These amendments revise the
Technical Specifications to extend the Modes from 1 and 2 that the
Reactor Trip System Power Range Nuclear Instrumentation--low setpoint
is to be operable to Modes 1, 2, and 3, when the reactor trip breakers
are in the closed position and the control drive system is capable of
rod withdrawl.
Date of issuance: January 29, 1998.
Effective date: As of the date of issuance, to be implemented
within 60 days.
Amendment Nos.: 205 and 187.
Facility Operating License Nos. DPR-70 and DPR-75: The amendments
revised the Technical Specifications.
Date of initial notice in Federal Register: November 19, 1997 (62
FR 68146).
The Commission's related evaluation of the amendments is contained
in a Safety Evaluation dated January 29, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Salem Free Public Library, 112
West Broadway, Salem, NJ 08079.
Southern Nuclear Operating Company, Inc., Docket Nos. 50-348 and 50-
364, Joseph M. Farley Nuclear Plant, Units 1 and 2, Houston County,
Alabama
Date of amendments request: June 30, 1997, as supplemented
September 25, 1997.
Brief Description of amendments: The amendments change the
Technical Specifications to incorporate requirements necessary to
change the basis for prevention of criticality in the fuel storage
pool. The change eliminates the credit for Boraflex as a neutron
absorbing material in the fuel storage pool criticality analysis.
Date of issuance: January 23, 1998.
Effective date: As of the date of issuance to be implemented within
30 days.
Amendment Nos.: Unit 1-133; Unit 2-125.
Facility Operating License Nos. NPF-2 and NPF-8: Amendments revise
the Technical Specifications.
Date of initial notice in Federal Register: August 27, 1997 (62 FR
45464).
The staff found that the supplement did not change the conclusions
of the proposed no significant hazards consideration; therefore,
renotification of the Commission's proposed determination of no
significant hazards consideration was not necessary.
The Commission's related evaluation of the amendments is contained
in a Safety Evaluation dated January 23, 1998.
No significant hazards consideration comments received: No.
Local Public Document Room location: Houston-Love Memorial Library,
212 W. Burdeshaw Street, Post Office Box 1369, Dothan, Alabama.
Dated at Rockville, Maryland, this 4th day of February 1998.
For the Nuclear Regulatory Commission.
Elinor G. Adensam,
Acting Director, Division of Reactor Projects--III/IV, Office of
Nuclear Reactor Regulation.
[FR Doc. 98-3269 Filed 2-10-98; 8:45 am]
BILLING CODE 7590-01-P