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NRC RIN: 3150-AJ49 Publication ID: Fall 2016 
Title: Mitigation of Beyond Design Basis Events (MBDBE) [NRC-2014-0240]  

This rule would enhance mitigation strategies for nuclear power reactors for beyond-design-basis external events.  This rulemaking addresses recommendations from the Near-Term Task Force (NTTF) related to station blackout, spent fuel pool long-term cooling, and emergency preparedness (NTTF Recommendations 4, 7, 8, and portions of 9, 10, and 11).  In staff requirements memorandum (SRM)-SECY-11-0124, the Commission directed the staff to initiate the station blackout rulemaking as a high-priority activity.  The staff’s proposal is intended to produce a more seamless accident response capability that includes emergency operating procedures, the newly imposed strategies and guidelines for beyond-design-basis external events, and the extensive damage mitigation guidelines.  In SRM-SECY-14-0046, the Commission approved the consolidation of the rulemaking activities.  The rulemaking would make generically applicable the requirements in the Mitigation Strategies Order EA-12-049 and Spent Fuel Pool Instrumentation Order EA-12-051 from 2012.  This rulemaking would partially address Petition for Rulemaking (PRM)-50-96 for long-term cooling capabilities in the event of a solar storm.   Additionally, this rule fully addresses PRMs 50-97, 50-98, 50-100, 50-101, and 50-102. 


Agency: Nuclear Regulatory Commission(NRC)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 10 CFR 50    10 CFR 52   
Legal Authority: 42 U.S.C. 2201    42 U.S.C. 5841   
Legal Deadline:  None
Action Date FR Cite
NPRM  11/13/2015  80 FR 70610   
NPRM Comment Period End  02/11/2016 
Final Rule  10/00/2017 
Additional Information: The staff has briefed the Advisory Committee for Reactor Safeguards on several occasions, including the Regulatory Policies and Practices Subcommittee on December 5, 2012, and April 23, 2013 (concerning the station blackout mitigation strategies regulatory basis), the Plant Operation and Fire Protection Subcommittee on February 6, 2103 (concerning the onsite emergency response capabilities regulatory basis), the ACRS full committee on June 5, 2013 (concerning the station blackout mitigation strategies regulatory basis), and July 10, 2014 (concerning consolidation of the station blackout mitigation strategies and onsite emergency capabilities rulemakings), November 21, 2014 (concerning the preliminary proposed rule language), and December 4, 2014 (also concerning the preliminary proposed rule language). Three draft regulatory guides will be issued with the proposed rule for comment. The proposed rulemaking package was provided to the Commission via SECY-15-0065 on April 30, 2015. The staff briefed the Commission on the proposed rulemaking activities and the Commission provided final direction to the staff via SRM-SECY-15-0065, dated August 27, 2015. The final rule is on schedule to be provided to the Commission in December 2016.
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Related RINs: Merged with 3150-AJ11, Merged with 3150-AJ08 
Agency Contact:
Timothy A. Reed
Nuclear Regulatory Commission
Office of Nuclear Reactor Regulation,
Washington, DC 20555-0001
Phone:301 415-1462