[Federal Register Volume 59, Number 183 (Thursday, September 22, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-23459]
[[Page Unknown]]
[Federal Register: September 22, 1994]
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NUCLEAR REGULATORY COMMISSION
Public Workshop on the Seismic Revisit of the Individual Plant
Examination of External Events (IPEEE) for Severe Accident
Vulnerabilities
AGENCY: Nuclear Regulatory Commission.
ACTION: Notice of workshop and availability of Draft NRC report on
Seismic Revisit of Individual Plant Examination of External Events
(IPEEE).
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SUMMARY: The NRC plans to conduct a workshop to discuss the results of
the seismic IPEEE revisit and solicit questions and comments. A draft
report on the staff position is being prepared and will be available on
October 7, 1994 at the NRC Public Document Room (PDR), Gelman Building,
2120 L Street NW., Washington, DC.
DATES: October 21, 1994; 9:00-5:00.
ADDRESSES: The NRC Auditorium, 11555 Rockville Pike, Rockville, MD
20852-2738.
FOR FURTHER INFORMATION CONTACT:
John T. Chen, Office of Nuclear Regulatory Research, U.S. Nuclear
Regulatory Commission, Washington, D.C. 20555. Telephone (301) 415-
6549.
SUPPLEMENTARY INFORMATION: On June 28, 1991 the NRC issued Generic
Letter 88-20, Supplement 4, Individual Plant Examination of External
Events (IPEEE) for Severe Accident Vulnerabilities, and NUREG-1407,
Procedural and Submittal Guidance for IPEEE. The Generic Letter
requested all licensees to perform an IPEEE to identify plant-specific
vulnerabilities to severe accidents due to external events and report
the results to the NRC. NUREG-1407 provides guidance for conducting the
IPEEE. Key elements of the development of the IPEEE guidance included
assigning earthquake review level and review scope for the seismic
events. In this development, for central and eastern U.S. plants, the
process of assigning plants to appropriate review categories has relied
largely on the use of available seismic hazard results: those developed
by Lawrence Livermore National Laboratory (LLNL) in 1989 and Electric
Power Research Institute (EPRI) in 1989. However, grouping of the
plants relied heavily on a grouping technique with a number of
attributes using seismic hazard on a relative basis. In 1993, based on
a re-elicitation of LLNL ground-motion and seismicity experts, revised
seismic hazard results were issued in NUREG-1488. The revised mean
hazard results are significantly lower than the 1989 LLNL results, and
are much closer to the 1989 EPRI hazard results. These results prompted
the NRC to revisit the seismic IPEEE program and consider the potential
impact of the revised LLNL results. The Draft Report will be discussed
during the workshop. A detailed agenda will be available on October 14,
1994 at the PDR.
Members of licensees' staff who are involved in seismic IPEEE
performance are encouraged to attend, along with other interested
members of the public. Those persons who wish to make a brief
presentation at the workshop, should indicate their desire to the
contact listed above, so that they can be added to the agenda. Early
notification is recommended since requests will be processed as they
are received. Written comments will also be accepted up to 4 weeks
following the workshop.
Dated in Rockville, Maryland this 15th day of September 1994.
For the Nuclear Regulatory Commission.
Joseph Murphy,
Acting Director, Division of Safety Issue Resolution, Office of Nuclear
Regulatory Research.
[FR Doc. 94-23459 Filed 9-21-94; 8:45 am]
BILLING CODE 7590-01-M
