[Federal Register Volume 90, Number 20 (Friday, January 31, 2025)]
[Rules and Regulations]
[Pages 8655-8656]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2025-02065]
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Rules and Regulations
Federal Register
________________________________________________________________________
This section of the FEDERAL REGISTER contains regulatory documents
having general applicability and legal effect, most of which are keyed
to and codified in the Code of Federal Regulations, which is published
under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.
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Federal Register / Vol. 90, No. 20 / Friday, January 31, 2025 / Rules
and Regulations
[[Page 8655]]
NUCLEAR REGULATORY COMMISSION
10 CFR Parts 50 and 52
[NRC-2024-0140]
Regulatory Guides: Criteria for Power Systems for Nuclear Power
Plants and Criteria for the Protection of Class 1E Power Systems and
Equipment for Nuclear Power Plants
AGENCY: Nuclear Regulatory Commission.
ACTION: Final guide; issuance.
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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing
Revision 4 to Regulatory Guide (RG) 1.32, ``Criteria for Power Systems
for Nuclear Power Plants,'' and new RG 1.238, ``Criteria for the
Protection of Class 1E Power Systems and Equipment for Nuclear Power
Plants.'' RG 1.32, Revision 4, describes an acceptable approach for use
in complying with NRC regulations for the design, operation, and
testing of electric power systems in nuclear power plants. RG 1.238
describes an acceptable approach for use in complying with NRC
regulations for protection of Class 1E power systems and equipment at
nuclear power plants. The NRC is also withdrawing RG 1.41,
``Preoperational Testing of Redundant On-Site Electric Power Systems to
Verify Proper Load Group Assignments,'' since its guidance is
incorporated into RG 1.32, Revision 4.
DATES: Revision 4 to RG 1.32 and Revision 0 to RG 1.238 are available
on January 31, 2025.
ADDRESSES: Please refer to Docket ID NRC-2024-0140 when contacting the
NRC about the availability of information regarding this document. You
may obtain publicly available information related to this document
using any of the following methods:
Federal Rulemaking Website: Go to https://www.regulations.gov and search for Docket ID NRC-2024-0140. Address
questions about Docket IDs in Regulations.gov to Stacy Schumann;
telephone: 301-415-0624; email: [email protected]. For technical
questions, contact the individuals listed in the FOR FURTHER
INFORMATION CONTACT section of this document.
NRC's Agencywide Documents Access and Management System
(ADAMS): You may obtain publicly available documents online in the
ADAMS Public Documents collection at https://www.nrc.gov/reading-rm/adams.html. To begin the search, select ``Begin Web-based ADAMS
Search.'' For problems with ADAMS, please contact the NRC's Public
Document Room (PDR) reference staff at 1-800-397-4209, at 301-415-4737,
or by email to [email protected]. The ADAMS accession number for
each document referenced (if it is available in ADAMS) is provided the
first time that it is mentioned in this document.
NRC's PDR: The PDR, where you may examine and order copies
of publicly available documents, is open by appointment. To make an
appointment to visit the PDR, please send an email to
[email protected] or call 1-800-397-4209 or 301-415-4737, between 8
a.m. and 4 p.m. eastern time (ET), Monday through Friday, except
Federal holidays.
Revision 4 to RG 1.32 and the regulatory analysis may be found in
ADAMS under Accession Nos. ML24306A036 and ML24158A062; and RG 1.238
and its regulatory analysis may be found in ADAMS under ML24306A049 and
ML24158A042, respectively. The basis for withdrawal of RG 1.41 may be
found in ADAMS under Accession No. ML24306A039.
Regulatory guides are not copyrighted, and NRC approval is not
required to reproduce them.
FOR FURTHER INFORMATION CONTACT: Michael Eudy, Office of Nuclear
Regulatory Research, telephone: 301-415-3104; email:
[email protected], Mohammad Sadollah, Office of Nuclear Regulatory
Research, telephone: 301-415-6804; email: [email protected],
and Sheila Ray, Office of Nuclear Reactor Regulation, telephone 301-
415-3653; email: [email protected]. All are staff of the U.S. Nuclear
Regulatory Commission, Washington, DC 20555-0001.
SUPPLEMENTARY INFORMATION:
I. Discussion
The NRC is issuing a revision and a new RG in the NRC's
``Regulatory Guide'' series. This series was developed to describe
methods that are acceptable to the NRC staff for implementing specific
parts of the agency's regulations, to explain techniques that the staff
use in evaluating specific issues or postulated events, and to describe
information that the staff needs in its review of applications for
permits and licenses.
The proposed Revision 4 to RG 1.32 was issued with a temporary
identification of Draft Regulatory Guide (DG), DG-1420; and the
proposed new RG 1.238 was issued with a temporary identification of DG-
1354.
II. Additional Information
The NRC published a notice of the availability of DG-1420 and DG-
1354 in the Federal Register on August 28, 2024 (89 FR 68787), for a
30-day public comment period. The public comment period closed on
September 27, 2024. Public comments and the NRC staff's responses to
the public comments on DG-1420 and DG-1354 are available in ADAMS under
Accession No. ML24306A053.
RG 1.32, Revision 4, describes an approach that is acceptable to
the NRC staff to meet regulatory requirements for the design,
operation, and testing of electric power systems in nuclear power
plants. Subject to the conditions described in Section C of the RG, it
endorses the Institute of Electrical and Electronics Engineers (IEEE)
Standard (Std.) 308-2020, ``IEEE Standard Criteria for Class 1E Power
Systems for Nuclear Power Generating Stations.'' In addition, RG 1.32,
Revision 4 includes the guidance provisions of RG 1.41,
``Preoperational Testing of Redundant On-Site Electric Power Systems to
Verify Proper Load Group Assignments,'' which describes methods
acceptable to the NRC staff for independence among redundant, onsite
power sources and their load groups as part of the initial
preoperational testing program and after major modifications or
repairs. The staff is withdrawing RG 1.41 because its guidance has been
incorporated into RG 1.32, Revision 4.
RG 1.238 describes an approach that is acceptable to the NRC staff
for use in complying with NRC regulations that addresses the protection
of Class 1E
[[Page 8656]]
power systems and equipment at nuclear power plants. Subject to the
conditions described in Section C of the RG, it endorses, IEEE Std.
741-2022, ``IEEE Standard for Criteria for the Protection of Class 1E
Power Systems and Equipment for Nuclear Power Generating Stations.''
As noted in the Federal Register on December 9, 2022 (87 FR 75671),
this document is being published in the ``Rules'' section of the
Federal Register to comply with publication requirements under chapter
I of title 1 of the Code of Federal Regulations (CFR).
III. Congressional Review Act
This RG is a rule as defined in the Congressional Review Act (5
U.S.C. 801-808). However, the Office of Management and Budget has not
found it to be a major rule as defined in the Congressional Review Act.
IV. Backfitting, Forward Fitting, and Issue Finality
The issuance of Revision 4 to RG 1.32 and RG 1.238 do not
constitute backfitting as defined in 10 CFR 50.109, ``Backfitting,''
and as described in NRC Management Directive (MD) 8.4, ``Management of
Backfitting, Forward Fitting, Issue Finality, and Information
Requests''; affect issue finality of any approval issued under 10 CFR
part 52, ``Licenses, Certificates, and Approvals for Nuclear Power
Plants''; or constitute forward fitting as defined in MD 8.4, because,
as explained in these RGs, licensees would not be required to comply
with the positions set forth in these RGs.
V. Submitting Suggestions for Improvement of Regulatory Guides
A member of the public may, at any time, submit suggestions to the
NRC for improvement of existing RGs or for the development of new RGs.
Suggestions can be submitted on the NRC's public website at https://www.nrc.gov/reading-rm/doc-collections/reg-guides/contactus.html.
Suggestions will be considered in future updates and enhancements to
the ``Regulatory Guide'' series.
Dated: January 28, 2025.
For the Nuclear Regulatory Commission.
Meraj Rahimi,
Chief, Regulatory Guide and Programs Management Branch, Division of
Engineering, Office of Nuclear Regulatory Research.
[FR Doc. 2025-02065 Filed 1-30-25; 8:45 am]
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