[Federal Register Volume 87, Number 151 (Monday, August 8, 2022)]
[Notices]
[Pages 48202-48203]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-16960]


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NUCLEAR REGULATORY COMMISSION

[NRC-2022-0036]


Water Sources for Long-Term Recirculation Cooling Following a 
Loss-of-Coolant Accident

AGENCY: Nuclear Regulatory Commission.

ACTION: Regulatory guide; issuance.

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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing 
Revision 5 of Regulatory Guide (RG) 1.82, ``Water Sources for Long-Term 
Cooling Following a Loss-of-Coolant Accident.'' This revised guidance 
updates the guidance for sumps and suppression pools that provide water 
sources for emergency core cooling, containment heat removal, or 
containment atmosphere cleanup systems. It also provides guidelines for 
evaluating the adequacy and the availability of the sump or suppression 
pool for long-term recirculation cooling following a loss-of-coolant 
accident, and the use of containment accident pressure in determining 
the net positive suction

[[Page 48203]]

head for the emergency core cooling and containment heat removal pumps.

DATES: Revision 5 to RG 1.82 is available on August 8, 2022.

ADDRESSES: Please refer to Docket ID NRC-2022-0036 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-2022-0036. 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 questions regarding use of ADAMS, please contact the 
NRC's Public Document Room (PDR) reference staff at 1-800-397-4209, 
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: You may examine and purchase copies of public 
documents, by appointment, at the NRC's PDR, Room P1 B35, One White 
Flint North, 11555 Rockville Pike, Rockville, Maryland 20852. 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 
8:00 a.m. and 4:00 p.m. Eastern Time (ET), Monday through Friday, 
except Federal holidays
    Revision 5 to RG 1.82 may be found in ADAMS under Accession No. 
ML22152A114.
    Regulatory guides are not copyrighted, and NRC approval is not 
required to reproduce them.

FOR FURTHER INFORMATION CONTACT: Ahsan Sallman, Office of Nuclear 
Reactor Regulation, telephone: 301-415-2380, email: 
[email protected], and James Steckel, Office of Nuclear Regulatory 
Research, telephone: 301-415-1026, email: [email protected]. Both 
are staff of the U.S. Nuclear Regulatory Commission, Washington, DC 
20555-0001.

SUPPLEMENTARY INFORMATION:

I. Discussion

    The NRC is issuing a revision to an existing guide in the NRC's 
``Regulatory Guide'' series. This series was developed to describe and 
make available to the public information regarding methods that are 
acceptable to the NRC staff for implementing specific parts of the 
agency's regulations, to explain techniques that the staff uses in 
evaluating specific issues or postulated events, and to describe 
information that the staff needs in its review of applications for 
permits and licenses.
    Revision 5 of RG 1.82 was issued with a temporary identification 
number of DG-1385 (ADAMS Accession No. ML21266A185).
    Revision 5 of RG 1.82, describes an approach that may be used to 
determine quality standards acceptable to the NRC staff to meet the 
regulatory requirements for sumps and suppression pools that provide 
water sources for emergency core cooling, containment heat removal, or 
containment atmosphere cleanup systems. Revision 5 of RG 1.82 also 
provides acceptable methods for evaluating the adequacy and the 
availability of the sump or suppression pool for long-term 
recirculation cooling following a loss-of-coolant accident, and the use 
of containment accident pressure in determining the net positive 
suction head for the emergency core cooling and containment heat 
removal pumps.

II. Additional Information

    In January 2015 the staff conducted a periodic review of Revision 4 
to RG 1.82, and on January 21, 2015, the staff reported the results of 
the periodic review, ``Result of Periodic Review of Regulatory Guide 
1.82,'' (ADAMS Accession No. ML14345A333). Based on the results of the 
periodic review, the staff concluded that a revision of RG 1.82 was 
warranted.
    The NRC published a notice of availability of DG-1385 in the 
Federal Register on February 8, 2022 (87 FR 7209) for a 30-day public 
comment period. A request from the Nuclear Energy Institute to allow 
more time for members of the public to submit their comments was 
accepted, and the public comment period was extended to April 8, 2022 
(87 FR 13019). Public comments and staff responses to those comments 
are available in ADAMS under Accession No. ML22145A479. In addition, 
staff considered and addressed technical issues related to the periodic 
review of RG 1.82, Revision 4.

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 this regulatory guide does not constitute 
backfitting as defined in section 50.109 of title 10 of the Code of 
Federal Regulations (10 CFR), ``Backfitting,'' and as described in NRC 
Management Directive 8.4, ``Management of Backfitting, Forward Fitting, 
Issue Finality, and Information Requests,'' or affect issue finality of 
any approval issued under 10 CFR part 52, ``Licenses, Certificates, and 
Approvals for Nuclear Power Plants,'' because, as explained in this 
regulatory guide, licensees are not required to comply with the 
positions set forth in this regulatory guide.

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: August 3, 2022.

    For the Nuclear Regulatory Commission.
Meraj Rahimi,
Chief, Regulatory Guide and Programs Management Branch, Division of 
Engineering, Office of Nuclear Regulatory Research.
[FR Doc. 2022-16960 Filed 8-5-22; 8:45 am]
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