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NRC RIN: 3150-AH42 Publication ID: Fall 2010 
Title: Performance-Based Emergency Core Cooling System Acceptance Criteria [NRC-2008-0332]  
Abstract: The advanced notice of proposed rulemaking (ANPRM) presents a conceptual approach that the Nuclear Regulatory Commission (NRC) is considering in a rulemaking effort to revise the acceptance criteria for emergency core cooling systems (ECCSs) for light-water nuclear power reactors as currently required by NRC regulations that govern domestic licensing of production and utilization facilities. Revised ECCS acceptance criteria would reflect recent research findings that indicate the current criteria should be re-evaluated for all fuel cladding materials in all potential conditions. Further, the NRC is considering an approach that would expand the applicability of the rule to all current and future cladding materials, modify the reporting requirements, and address the issues raised in a petition for rulemaking (PRM) regarding crud and oxide deposits and hydrogen content in fuel cladding. With this ANPRM, the NRC seeks comment on specific questions and issues for consideration related to this proposed conceptual approach to revising the ECCS acceptance criteria. 
Agency: Nuclear Regulatory Commission(NRC)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 10 CFR 50   
Legal Authority: 42 USC 2201    42 USC 5841   
Legal Deadline:  None
Timetable:
Action Date FR Cite
ANPRM  08/13/2009  74 FR 40765   
ANPRM Comment Period End  10/27/2009    
NPRM  01/00/2011    
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Tara Inverso
Nuclear Regulatory Commission
Office of Nuclear Reactor Regulation,
Washington, DC 20555-0001
Phone:301 415-1024
Email: tara.inverso@nrc.gov