Voglio sapere a riguardo di…

34916

Federal Register / Vol. 86, No. 124 / Thursday, July 1, 2021 / Rules and Regulations
statement as appropriate under NEPA as part of the application for the construction and operation of a facility referencing any particular DC rule.
However, consistent with 51.30d and 51.31b, the NRC has prepared an environmental assessment, Environmental Assessment by the U.S.
Nuclear Regulatory Commission Relating to Renewal of the Certification of the ABWR Standard Design, for the U.S. ABWR design renewal addressing various design alternatives to prevent and mitigate severe accidents. The environmental assessment is based, in part, upon the NRCs review of GEHs supplemental evaluation of various severe accident mitigation design alternatives to prevent and mitigate severe accidents required in Amendment to Technical Support Document for the ABWR, which updates information in the original Technical Support Document for the ABWR. Based upon review of GEHs evaluation, the Commission concludes that 1 GEH identified a reasonably complete set of potential design alternatives to prevent and mitigate severe accidents for the U.S. ABWR
design renewal; 2 none of the potential design alternatives are justified on the basis of cost-benefit considerations; and 3 it is unlikely that other design changes would be identified and justified during the term of the design certification on the basis of cost-benefit considerations because the estimated core damage frequencies for the U.S.
ABWR are very low on an absolute scale. These issues are considered resolved for the U.S. ABWR design.
Based on its own independent evaluation, the NRC reached the same conclusion as GEH that none of the possible candidate design alternatives are potentially cost beneficial for the U.S. ABWR design. This independent evaluation was based on reasonable treatment of costs, benefits, and sensitivities. The NRC concludes that GEH has adequately identified areas where risk potentially could be reduced in a cost-beneficial manner and
adequately assessed whether the implementation of the identified potential severe accident mitigation design alternatives or candidate design alternatives would be cost beneficial for the given evaluation criteria as provided in the U.S. ABWR DC renewal environmental assessment.
The finality of all environmental issues concerning severe accident mitigation design alternatives in the current U.S. ABWR design certification rule relied on site parameters being within those specified in the technical support document for the original U.S.
ABWR, dated December 1994 as amended November 30, 2010. However, in an Atomic Safety and Licensing Board memorandum and order in the South Texas Project Electric Generating Station Units 3 and 4 Combined License proceeding LBP1107, the board determined that no list of site parameters was specified in the U.S.
ABWR technical support document.
Therefore, the NRC staff re-evaluated the criteria for determining whether finality for severe accident mitigation design alternatives should apply in a future U.S. ABWR licensing action. To this end, the NRC staff selected the criteria for finality as the averted risk person-rem value for each severe accident mitigation design alternative provided in Table 5 of the original technical support document. Although finality criteria for the severe accident mitigation design alternative for this DC
renewal action cannot be based on site parameters, the selected criteria, if met, provide assurance that a severe accident mitigation design alternative would still not be cost beneficial at a proposed site for the U.S. ABWR design. Therefore, the NRC finds that the evaluation performed by GEH is reasonable and sufficient.
The environmental assessment is available as indicated in Section XVI, Availability of Documents.

information subject to the Paperwork Reduction Act of 1995 44 U.S.C. 3501
et seq.. Existing collections of information were approved by the Office of Management and Budget, control number 31500151.

XIII. Paperwork Reduction Act Statement This final rule does not contain any new or amended collections of
The documents identified in the following table are available to interested persons through one or more of the following methods, as indicated.

Public Protection Notification The NRC may not conduct or sponsor, and a person is not required to respond to, a collection of information unless the document requesting or requiring the collection displays a currently valid OMB control number.
XIV. Congressional Review Act This final rule is a rule as defined in the Congressional Review Act 5 U.S.C.
801808. However, the Office of Management and Budget has not found it to be a major rule as defined in the Congressional Review Act.
XV. Agreement State Compatibility Under the Policy Statement on Adequacy and Compatibility of Agreement States Programs, approved by the Commission on June 20, 1997, and published in the Federal Register 62 FR 46517; September 3, 1997, this rule is classified as compatibility NRC. Compatibility is not required for Category NRC regulations. The NRC
program elements in this category are those that relate directly to areas of regulation reserved to the NRC by the Atomic Energy Act or the provisions of 10 CFR, and although an Agreement State may not adopt program elements reserved to the NRC, it may wish to inform its licensees of certain requirements by a mechanism that is consistent with a particular States administrative procedure laws, but does not confer regulatory authority on the State.
XVI. Availability of Documents
DOCUMENTS RELATED TO U.S. ABWR DESIGN CERTIFICATION RENEWAL RULE
ADAMS Accession No./
Federal Register citation
khammond on DSKJM1Z7X2PROD with RULES

Document SECY200112, Direct Final RuleAdvanced Boiling Water Reactor Design Certification Renewal RIN 3150AK04;
NRC20170090, December 9, 2020.
GE-Hitachi ABWR Design Control Document Tier 1 & 2, Revision 7, October 2019 includes correction noted, as of March 2020.
GE-Hitachi Nuclear Energy, Transmittal of ABWR Standard Plant Design Certification Renewal Application Design Control Document, Revision 5, Tier 1 and Tier 2, December 7, 2010.
GE-Hitachi ABWR Design Control Document Tier 1 & 2, Revision 5, December 7, 2010
Technical Report NEDO33875, ABWR U.S. Certified DesignAircraft Impact Assessment, Licensing Basis Information and Design Details for Key Design Features, Rev. 3 M170049, February 2017.

VerDate Sep<11>2014

15:54 Jun 30, 2021

Jkt 253001

PO 00000

Frm 00012

Fmt 4700

Sfmt 4700

E:FRFM01JYR1.SGM

01JYR1

ML20170A520
ML20093K254
ML110040176
ML110040323
ML17059C523