2010-23950. Draft Regulatory Guide: Issuance, Availability

AGENCY:

Nuclear Regulatory Commission.

ACTION:

Notice of Issuance and Availability of Draft Regulatory Guide, DG-1244, “Availability of Electric Power Sources.”

FOR FURTHER INFORMATION CONTACT:

Satish Aggarwal, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, telephone: [phone] or e-mail [e-mail].

SUPPLEMENTARY INFORMATION:

I. Introduction

The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment a draft guide in the agency's “Regulatory Guide” series. This series was developed to describe and make available to the public such information as methods that are acceptable to the NRC staff for implementing specific parts of the NRC's regulations, techniques that the staff uses in evaluating specific problems or postulated accidents, and data that the staff needs in its review of applications for permits and licenses.

The draft regulatory guide (DG), entitled, “Availability of Electric Power Sources” temporarily identified by its task number, DG-1244, which should be mentioned in all related correspondence. DG-1244 is proposed Revision 1 of Regulatory Guide 1.93, dated May 1974. This regulatory guide describes guidelines that the staff of the U.S. Nuclear Regulatory Commission (NRC) considers acceptable when the available electric power sources are less than the number of sources required by the limiting conditions for operation (LCOs) for a facility. This regulatory guide is applicable to single- and multiple-unit plants and is consistent with the improved Standard Technical Specifications (iSTS). The LCO-required actions and specified completion times referred to in this regulatory guide are based on the completion times presented in Regulatory Guide 1.93, “Availability of Electric Power Sources,” Revision 0, issued December 1974, which have been incorporated into the required actions in the iSTS.

II. Further Information

The NRC staff is soliciting comments on DG-1244. Comments may be accompanied by relevant information or supporting data and should mention DG-1244 in the subject line. Comments submitted in writing or in electronic form will be made available to the public in their entirety through the NRC's Agencywide Documents Access and Management System (ADAMS).

Because your comments will not be edited to remove any identifying or contact information, the NRC cautions you against including any information in your submission that you do not want to be publicly disclosed.

The NRC requests that any party soliciting or aggregating comments received from other persons for submission to the NRC inform those persons that the NRC will not edit their comments to remove any identifying or contact information, and therefore, they should not include any information in their comments that they do not want publicly disclosed. You may submit comments by any of the following methods:

1. Mail comments to: Rules, Announcements, and Directives Branch, Mail Stop: TWB-05-B01M, Office of Administration, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001.

2. Federal e-Rulemaking Portal: Go to http://www.regulations.gov and search for documents filed under Docket ID [NRC-2010-0305]. Address questions about NRC dockets to Carol Gallagher, 301-492-3668; e-mail [e-mail].

3. Fax comments to: Rules, Announcements, and Directives Branch, Office of Administration, U.S. Nuclear Regulatory Commission at [phone].

Comments would be most helpful if received by November 26, 2010. Comments received after that date will be considered if it is practical to do so, but the NRC is able to ensure consideration only for comments received on or before this date. Although a time limit is given, comments and suggestions in connection with items for inclusion in guides currently being developed or improvements in all published guides are encouraged at any time.

Requests for technical information about DG-1244 may be directed to the NRC contact, Satish Aggarwal at [phone] or e-mail [e-mail].

Electronic copies of DG-1244 are available through the NRC's public Web site under Draft Regulatory Guides in the “Regulatory Guides” collection of the NRC's Electronic Reading Room at http://www.nrc.gov/​reading-rm/​doc-collections/​. Electronic copies are also available in ADAMS (http://www.nrc.gov/​reading-rm/​adams.html), under Accession No. ML100840581.

In addition, regulatory guides are available for inspection at the NRC's Public Document Room (PDR) located at 11555 Rockville Pike, Rockville, Maryland. The PDR's mailing address is USNRC PDR, Washington, DC 20555-0001. The PDR can also be reached by telephone at [phone] or [phone], by fax at [phone], and by e-mail to [e-mail].

Regulatory guides are not copyrighted, and Commission approval is not required to reproduce them.

Dated at Rockville, Maryland, this 17th day of September, 2010.

For the Nuclear Regulatory Commission.

Harriet Karagiannis,

Acting Chief, Regulatory Guide Development Branch, Division of Engineering, Office of Nuclear Regulatory Research.