Document: NUREG-0800
Document ID: 7f6b0af0-d79e-4704-9eac-aa03109a7731
Document Type: srp
Title: RISK-INFORMED DECISIONMAKING: TECHNICAL SPECIFICATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0425/ML042520260.pdf
Revision Date: 2023-06
Chapter: 16
Section ID: 16.1
CFR Part: 
CFR Title: 

Content:
other TS proposals approved by the NRC. If there is a baseline for approving similar TS changes for similar type plants, then only differences between previously accepted submittals and the one under review xwould need to be assessed. The need to independently validate the PRA in the context of the TS proposal is based on the need to establish a defensible probabilistic basis for approving the TS change. The basis will depend on the extent to which PRA plays a role in the decision making process. ii. PRA Review Considerations The PRA review will cover the items presented below. TheRefore the licensee's application must contain sufficient detail to evaluate these items. General guidance for reviewing these items can be found in SRP Chapter 19, Section 11.2.2, "Risk Assessment." Additional guidance specific to the review of TS changes is provided here. a) Quality of the PRA The reviewer should consider the quality and validity of the PRA during the review of the licensee's submittal for the TS change. Has the PRA been previously reviewed by the NRC? Did the NRC SER on the IPE or other NRC reviews of the PRA identify any shortcomings? Have any identified shortcomings been addressed and satisfactorily resolved by the licensee, if they are relevant to the proposed TS change? The quality of the PRA must be compatible with the safety implications of the TS change being requested and the role that the PRA plays in justifying that change. That is, the more the potential change in risk or the greater the uncertainty in that risk from the requested TS change, or both, the more rigor that must go into ensuring the quality of the PRA. One approach a licensee could use to ensure quality is to perform a peer review of the PRA. In this case, the submittal should document the review process, the qualification of the reviewers, a summary of the review findings, and resolutions to these findings when applicable. Industry PRA certification programs and PRA cross-comparison studies