[Federal Register Volume 70, Number 245 (Thursday, December 22, 2005)]
[Page 76083]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E5-7702]



Proposed Generic Communication Post-Fire Safe-Shutdown Circuit 
Analysis Spurious Actuations

AGENCY: Nuclear Regulatory Commission (NRC).

ACTION: Notice of opportunity for public comment. Reopening of comment 


SUMMARY: On October 19, 2005 (70 FR 60859), the NRC published for 
public comment a generic letter (GL) to:
    (1) Request addressees to review their fire protection program to 
confirm compliance with existing applicable regulatory requirements 
regarding their assumptions of the phrase ``one-at-a-time'' in light of 
the information provided in this GL and, if appropriate, take 
additional actions to return to compliance. Specifically, although some 
licensees have performed their post-fire, safe-shutdown circuit 
analyses based on an assumption of only a single spurious actuation per 
fire event or that spurious actuations will occur ``one-at-a-time,'' 
recent industry cable fire test results demonstrated that these 
assumptions are not valid.
    (2) Require addressees to submit a written response to the NRC in 
accordance with NRC regulations in Title 10 of the Code of Federal 
Regulations (10 CFR) Section 50.54(f).
    The Nuclear Energy Institute (NEI) has requested a 45-day extension 
of the comment period. NEI believes that additional time will be needed 
to provide appropriate comments on the draft GL. NEI based its request 
on the time needed to perform an assessment of the safety significance 
of multiple sequential and cumulative failures; an evaluation of the 
industry test results and interviews with the industry project team; an 
evaluation of the NUREG/CR-6776, and an assessment of the NRC/licensee 
documentation associated with the prior NRC staff positions and 
practices related to safe-shutdown circuit analysis. The NRC has 
decided to reopen the comment period for an additional 45 days.
    This Federal Register notice is available through the NRC's 
Agencywide Documents Access and Management System (ADAMS) under 
accession number ML051650017.

DATES: The comment period has been extended and now expires February 6, 
2006. Comments submitted after this date will be considered if it is 
practical to do so, but assurance of consideration cannot be given 
except for comments received on or before this date.

ADDRESSEES: Submit written comments to the Chief, Rules and Directives 
Branch, Division of Administrative Services, Office of Administration, 
U.S. Nuclear Regulatory Commission, Mail Stop T6-D59, Washington, DC 
20555-0001, and cite the publication date and page number of this 
Federal Register notice. Written comments may also be delivered to NRC 
Headquarters, 11545 Rockville Pike (Room T-6D59), Rockville, Maryland, 
between 7:30 am and 4:15 pm on Federal workdays.

FOR FURTHER INFORMATION CONTACT: Robert Wolfgang at 301-415-1624 or by 
e-mail: [email protected].
    Documents may be examined, and/or copied for a fee, at the NRC's 
Public Document Room at One White Flint North, 11555 Rockville Pike 
(first floor), Rockville, Maryland. Publicly available records will be 
accessible electronically from the Agencywide Documents Access and 
Management System (ADAMS) Public Electronic Reading Room on the 
Internet at the NRC Web site, http://www.nrc.gov/NRC/ADAMS/index.html. 
If you do not have access to ADAMS or if you have problems in accessing 
the documents in ADAMS, contact the NRC Public Document Room (PDR) 
reference staff at 1-800-397-4209 or 301-415-4737 or by e-mail to 
[email protected].

    Dated at Rockville, Maryland, this Friday the 16th day of 
December 2005.

    For the Nuclear Regulatory Commission.
Christopher I. Grimes,
Division of Policy and Rulemaking, Office of Nuclear Reactor 
[FR Doc. E5-7702 Filed 12-21-05; 8:45 am]