[Federal Register Volume 78, Number 80 (Thursday, April 25, 2013)]
[Notices]
[Pages 24438-24439]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-09795]
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NUCLEAR REGULATORY COMMISSION
[NRC-2011-0152]
Evaluations of Explosions Postulated To Occur at Nearby
Facilities and on Transportation Routes Near Nuclear Power Plants
AGENCY: Nuclear Regulatory Commission.
ACTION: Regulatory guide; issuance.
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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing a
revision to Regulatory Guide (RG) 1.91, ``Evaluations of Explosions
Postulated to Occur at Nearby Facilities and on Transportation Routes
Near Nuclear Power Plants.'' This regulatory guide describes for
applicants seeking nuclear power reactor licenses and licensees of
nuclear power reactors methods that the NRC's staff finds acceptable
for evaluating postulated explosions at nearby facilities and
transportation routes.
ADDRESSES: Please refer to Docket ID NRC-2011-0152 when contacting the
NRC about the availability of information regarding this document. You
may access information related to this document, which the NRC
possesses and is publicly available, using any of the following
methods:
Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC-2011-0152. Address
questions about NRC dockets to Carol Gallagher; telephone: 301-492-
3668; email: [email protected]. For technical questions, contact
the individual(s) listed in the FOR FURTHER INFORMATION CONTACT section
of this document.
NRC's Agencywide Documents Access and Management System
(ADAMS): You may access publicly available documents online in the NRC
Library at http://www.nrc.gov/reading-rm/adams.html. To begin the
search,
[[Page 24439]]
select ``ADAMS Public Documents'' and then 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, 301-415-
4737, or by email to [email protected]. The ADAMS accession number
for each document referenced in this notice (if that document is
available in ADAMS) is provided the first time that a document is
referenced. Revision 2 of Regulatory Guide 1.91 is available under
ADAMS Accession No. ML12170A980. The regulatory analysis may be found
under ADAMS Accession No. ML12170A989.
Regulatory guides are not copyrighted, and NRC approval is not
required to reproduce them.
NRC's PDR: You may examine and purchase copies of public
documents at the NRC's PDR, Room O1-F21, One White Flint North, 11555
Rockville Pike, Rockville, Maryland 20852.
Regulatory guides are not copyrighted, and NRC approval is not
required to reproduce them.
FOR ADDITIONAL INFORMATION CONTACT: Hector Rodriguez-Luccioni, Office
of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission,
Washington, DC 20555-0001; telephone: 301-251-7685; email:
[email protected].
SUPPLEMENTARY INFORMATION:
I. Introduction
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 such as methods that are
acceptable to the 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 2 of RG 1.91 was issued with a temporary identification as
Draft Regulatory Guide, DG-1270. This guide describes for applicants
and licensees of nuclear power reactors some methods and assumptions
the NRC's staff finds acceptable for evaluating postulated explosions
at nearby facilities and transportation routes. It describes the
calculation of safe distances based on estimates of trinitrotoluene
(TNT)-equivalent mass of explosive materials, the calculation of
exposure rates based on hazardous cargo transportation frequencies, and
the calculation of blast load effects.
This guide describes methods that the NRC's staff considers
acceptable to implement Section 100.20(b) of Title 10 the Code of
Federal Regulations (10 CFR), and 10 CFR part 50, appendix A, General
Design Criterion 4. Section 100.20(b) requires that the nature and
proximity of hazards related to human activity (e.g., airports, dams,
transportation routes, and military and chemical facilities) must be
evaluated to establish site parameters for use in determining if a
plant design can accommodate commonly occurring hazards, and if the
risk of other hazards is very low. General Design Criterion 4 requires
that nuclear power plant structures, systems, and components (SSCs)
important to safety be appropriately protected against dynamic effects
resulting from equipment failures and from events and conditions that
may occur outside the nuclear power plant.
II. Further Information
DG-1270 was published in the Federal Register on July 20, 2011 (76
FR 43356) for a 60-day public comment period. The public comment period
closed on September 19, 2012. Public comments on DG-1270 and the staff
responses to the public comments are available under ADAMS Accession
No. ML12170A987.
III. Backfitting and Issue Finality
Issuance of this final regulatory guide does not constitute
backfitting as defined in 10 CFR 50.109 (the Backfit Rule) and is not
otherwise inconsistent with the issue finality provisions in 10 CFR
part 52. As discussed in the ``Implementation'' section of this
regulatory guide, the NRC has no current intention to impose this
regulatory guide on holders of current operating licenses, early site
permits or combined licenses.
This regulatory guide may be applied to applications for operating
licenses, early site permits, and combined licenses docketed by the NRC
as of the date of issuance of the final regulatory guide and to future
applications for operating licenses, early site permits, and combined
licenses submitted after the issuance of the regulatory guide. Such
action does not constitute backfitting as defined in 10 CRF
50.109(a)(1) and is not otherwise inconsistent with the applicable
issue finality provisions in 10 CFR part 52, inasmuch as such
applicants or potential applicants are not within the scope of entities
protected by the Backfit Rule or the relevant issue finality provisions
in Part 52.
Dated at Rockville, Maryland, this 17th day of April, 2013.
For the Nuclear Regulatory Commission.
Thomas H. Boyce,
Chief, Regulatory Guide Development Branch, Division of Engineering,
Office of Nuclear Regulatory Research.
[FR Doc. 2013-09795 Filed 4-24-13; 8:45 am]
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