[Federal Register Volume 75, Number 41 (Wednesday, March 3, 2010)]
[Pages 9626-9627]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-4435]




Notice of Issuance of Regulatory Guide

AGENCY: Nuclear Regulatory Commission.

ACTION: Notice of issuance and availability of Regulatory Guide 1.47, 
Revision 1, ``Bypassed and Inoperable Status Indication for Nuclear 
Power Plant Safety Systems.''


FOR FURTHER INFORMATION CONTACT: Khoi Nguyen, U.S. Nuclear Regulatory 
Commission, Washington, DC 20555-0001, telephone (301) 251-7453 or e-
mail [email protected].


I. Introduction

    The U.S. Nuclear Regulatory Commission (NRC) is issuing a revision 
to an existing guide in the agency's ``Regulatory Guide'' series. This 
series was developed to describe and make available to the public 
information such as methods that are acceptable to the

[[Page 9627]]

NRC staff for implementing specific parts of the agency'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.
    Revision 1 of Regulatory Guide 1.47 was issued with a temporary 
identification as Draft Regulatory Guide, DG-1205. This guide describes 
a method that the staff of the NRC considers acceptable for use in 
complying with the NRC's regulations with respect to bypassed and 
inoperable status indication for nuclear power plant safety systems.
    The regulatory framework that the NRC has established for nuclear 
power plants consists of a number of regulations and supporting 
guidelines applicable to bypassed and inoperable status indication, 
including, but not limited to, General Design Criterion (GDC) 1, 
``Quality Standards and Records,'' GDC 13, ``Instrumentation and 
Control,'' GDC 19, ``Control Room,'' GDC 21, ``Protection System 
Reliability and Testability,'' GDC 22, ``Protection System 
Independence,'' and GDC 24, ``Separation of Protection and Control 
Systems,'' as set forth in Appendix A, ``General Design Criteria for 
Nuclear Power Plants,'' to Title 10, Part 50, ``Domestic Licensing of 
Production and Utilization Facilities,'' of the Code of Federal 
Regulations (10 CFR part 50). GDC 1 requires that structures, systems, 
and components important to safety be designed and installed to quality 
standards commensurate with the importance-to-safety of the functions 
to be performed. GDC 13 requires that appropriate controls be provided 
to maintain variables and systems that can affect the fission process, 
the integrity of the reactor core, the reactor coolant pressure 
boundary, and the containment and its associated systems within 
prescribed operating ranges. GDC 19 requires that a control room be 
provided from which actions can be taken to operate the nuclear power 
unit safely under normal operating conditions. GDC 21 requires that the 
protection system be designed for high functional reliability and 
inservice testability. GDC 22 requires that the protection system be 
designed to ensure that the effects of normal operating, maintenance, 
and testing on redundant channels do not result in the loss of the 
protection function or be demonstrated to be acceptable on some other 
defined basis. GDC 24 requires that interconnection of the protection 
and control systems be limited to ensure that safety is not 
significantly impaired.

II. Further Information

    In October 2008, DG-1205 was published with a public comment period 
of 60 days from the issuance of the guide. The public comment period 
closed on December 22, 2008. The staff's responses to the comments 
received are located in the NRC's Agencywide Documents Access and 
Management System (ADAMS) under Accession No. ML092330085.
    Electronic copies of Regulatory Guide 1.47, Revision 1 are 
available through the NRC's public Web site under ``Regulatory Guides'' 
at http://www.nrc.gov/reading-rm/doc-collections/.
    In addition, regulatory guides are available for inspection at the 
NRC's Public Document Room (PDR) located at Room O-1F21, One White 
Flint North, 11555 Rockville Pike, Rockville, Maryland 20852-2738. The 
PDR's mailing address is USNRC PDR, Washington, DC 20555-0001. The PDR 
can also be reached by telephone at (301) 415-4737 or (800) 397-4209, 
by fax at (301) 415-3548, and by e-mail to [email protected].
    Regulatory guides are not copyrighted, and NRC approval is not 
required to reproduce them.

    Dated at Rockville, Maryland, this 24th day of February 2010.

    For the Nuclear Regulatory Commission.
Andrea D. Valentin,
Chief, Regulatory Guide Development Branch, Division of Engineering, 
Office of Nuclear Regulatory Research.
[FR Doc. 2010-4435 Filed 3-2-10; 8:45 am]