[Federal Register Volume 74, Number 181 (Monday, September 21, 2009)]
[Pages 48102-48103]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: E9-22601]




Draft Regulatory Guide: Issuance, Availability

AGENCY: Nuclear Regulatory Commission.

ACTION: Notice of Issuance and Availability of Draft Regulatory Guide, 


FOR FURTHER INFORMATION CONTACT: Jerome Bettle, U.S. Nuclear Regulatory 
Commission, Washington, DC 20555-0001, telephone: (301) 415-1314 or e-
mail to [email protected].


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), titled, ``Instrument Lines 
Penetrating the Primary Reactor Containment,'' is temporarily 
identified by its task number, DG-1225, which should be mentioned in 
all related correspondence. DG-1225 is proposed Revision 1 of 
Regulatory Guide 1.11, dated March 1971.
    General Design Criterion (GDC) 55, ``Reactor Coolant Pressure 
Boundary Penetrating Containment,'' and GDC 56, ``Primary Containment 
Isolation,'' of 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) require, in part, that each line that penetrates the primary 
reactor containment and that is part of the reactor coolant pressure 
boundary or connects directly to the containment atmosphere has at 
least one locked, closed isolation valve or one automatic valve inside 
and one automatic valve outside containment ``unless it can be 
demonstrated that the containment isolation provisions for a specific 
class of lines, such as instrument lines, are acceptable on some other 
defined basis.'' This guide defines a basis that the staff of the NRC 
considers acceptable to implement GDC 55 and 56 with regard to 
instrument lines. This guide applies to all types of nuclear power 

II. Further Information

    The NRC staff is soliciting comments on DG-1225. Comments may be 
accompanied by relevant information or supporting data and should 
mention DG-1225 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).
    Personal information will not be removed from your comments. You 
may submit comments by any of the following methods:

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

[[Page 48103]]

    2. E-mail comments to: [email protected].
    3. Fax comments to: Rulemaking and Directives Branch, Office of 
Administration, U.S. Nuclear Regulatory Commission at (301) 492-3446.
    Requests for technical information about DG-1225 may be directed to 
the NRC contact, Jerome Bettle at (301) 415-1314 or e-mail to 
[email protected].
    Comments would be most helpful if received by November 16, 2009. 
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.
    Electronic copies of DG-1225 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. 
    In addition, regulatory guides are available for inspection at the 
NRC's Public Document Room (PDR), which is 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 
(301) 415-4737 or (800) 397-4205, by fax at (301) 415-3548, and by e-
mail to [email protected].
    Regulatory guides are not copyrighted, and Commission approval is 
not required to reproduce them.

    Dated at Rockville, Maryland, this 14th day of September, 2009.

    For the Nuclear Regulatory Commission.
Andrea D. Valentin,
Chief, Regulatory Guide Development Branch, Division of Engineering, 
Office of Nuclear Regulatory Research.
[FR Doc. E9-22601 Filed 9-18-09; 8:45 am]