Document: NUREG-0800
Document ID: 0d034ca5-ee9b-43ca-a6d6-b08e537d605b
Document Type: srp
Title: Determining the Technical Adequacy of Probabilistic Risk
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0625/ML062510220.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.1
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the NEI peer review process, including the self-assessment guidance. On May 19, 2006, NEI issued a revision to the self-assessment guidance and incorporated it in NEI-00-02, to satisfy the peer review requirement(s) of the ASME PRA Standard (ASME-RA-Sa-2003) as endorsed/modified by the NRC and updated by Addendum B of the ASME PRA Standard (Ref. 10). Regulatory Guide 1.200 (Ref. 11) and this Standard Review Plan (SRP) Chapter 19.1 have been revised to address Addendum B of the ASME standard and the revised NEI peer review process. In developing this SRP chapter, the staff considered the NRC's guidance on the use of PRA in risk-informed regulatory applications as documented in Regulatory Guide 1.174 (Ref. 12) and the associated SRP Chapter 19 (Ref. 13). These documents make it clear that PRA information is one input into making a decision. Specifically, the decision-making process will use the results of the risk analyses in a manner that complements traditional engineering approaches, supports the defense-in-depth philosophy, and preserves safety margins. Thus, risk analysis will inform, but it will not determine regulatory decisions. This SRP chapter concerns any licensee request submitted for NRC review and approval for which information from a PRA plays an effective role in the decision-making process. It will be used to support application-specific SRP chapters that provide guidance for several activities, including the following examples: • changes to a plant’s licensing basis (SRP Chapter 19) (Ref. 13) • changes to allowed outage times and surveillance test intervals in plant-specific technical specifications (SRP Chapter 16.1) (Ref. 14) • changes in the scope and frequency of tests on pumps and valves in a licensee's inservice test program (SRP Chapter 3.9.7) (Ref. 15) 4 • changes in the scope and frequency of inspections in a licensee's inservice inspection program (draft SRP Chapter 3.9.8) (Ref. 16). The above documents address reviewing the