[Federal Register Volume 73, Number 221 (Friday, November 14, 2008)]
[Notices]
[Page 67555]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E8-27100]


=======================================================================
-----------------------------------------------------------------------

NUCLEAR REGULATORY COMMISSION


NUREG/CR-XXXX, ``Modeling a Digital Feedwater Control System 
Using Traditional Probabilistic Risk Assessment Methods''; Draft Report 
for Comment

AGENCY: U.S. Nuclear Regulatory Commission.

ACTION: Notice of availability for public comment.

-----------------------------------------------------------------------

SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is conducting 
research to support development of regulatory guidance for using risk 
information related to digital systems in the licensing actions of 
nuclear power plants (NPPs). The objective of this research is to 
identify and develop methods, analytical tools, and regulatory guidance 
to support (1) using information on the risks of digital systems in NPP 
licensing decisions and (2) including models of digital systems into 
NPP probabilistic risk assessments (PRAs).
    As part of this research, NRC is sponsoring a project on the use of 
traditional PRA methods to develop and quantitatively assess 
reliability models of digital systems. The initial tasks of this 
project, including preparatory work for developing reliability models 
of an example system, are addressed in NUREG/CR-6962, ``Traditional 
Probabilistic Risk Assessment Methods for Digital Systems'' (to be 
published shortly). The application of the selected traditional methods 
to the example system is documented in draft NUREG/CR-XXXX, ``Modeling 
a Digital Feedwater Control System Using Traditional Probabilistic Risk 
Assessment Methods.'' This notice announces the availability of the 
draft NUREG/CR for public comment.

DATES: Please submit comments on NUREG/CR-XXXX, ``Modeling a Digital 
Feedwater Control System Using Traditional Probabilistic Risk 
Assessment Methods,'' by December 29, 2008. Comments received after 
this date will be considered if practical to do so, but the NRC staff 
is able to ensure consideration only for those comments received on or 
before this date.

ADDRESSES: NUREG/CR-XXXX, ``Modeling a Digital Feedwater Control System 
Using Traditional Probabilistic Risk Assessment Methods,'' is available 
for inspection and copying for a fee at NRC's Public Document Room 
(PDR), Public File Area O-1F21, One White Flint North, 11555 Rockville 
Pike, Rockville, Maryland. Publicly available documents created or 
received at NRC after November 1, 1999, are available electronically at 
NRC's Electronic Reading Room at http://www.nrc.gov/NRC/ADAMS/index.html. From this site, the public can gain entry into NRC's 
Agencywide Document Access and Management System (ADAMS), which 
provides text and image files of NRC's public documents. The ADAMS 
Accession Numbers for NUREG/CR-XXXX, ``Modeling a Digital Feedwater 
Control System Using Traditional Probabilistic Risk Assessment 
Methods,'' are ML082800062 (main report) and ML082800063 (appendices). 
If you do not have access to ADAMS or have problems accessing the 
documents located in ADAMS, contact the NRC PDR Reference staff at 1-
800-397-4209, (301) 415-4737, or by e-mail to [email protected].
    This document also will be posted on NRC's public Web site at: 
http://www.nrc.gov/about-nrc/regulatory/research/digital/tech-reference.html#one.
    Please submit comments to Chief, Rulemaking, Directives and Editing 
Branch, Division of Administrative Services, Office of Administration, 
U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001. You also 
may deliver comments to 11545 Rockville Pike, Rockville, MD, between 
7:30 a.m. and 4:30 p.m. on Federal workdays, or by e-mail to: 
[email protected].

FOR FURTHER INFORMATION CONTACT: Alan Kuritzky, Office of Nuclear 
Regulatory Research, U.S. Nuclear Regulatory Commission, Washington, DC 
20555-0001, telephone (301) 415-6255, e-mail: [email protected].

    Dated at Rockville, Maryland this 6th day of November, 2008.
    For the U.S. Nuclear Regulatory Commission.

Christiana Lui,
Director, Division of Risk Analysis, Office of Nuclear Regulatory 
Research.
 [FR Doc. E8-27100 Filed 11-13-08; 8:45 am]
BILLING CODE 7590-01-P