Document: NUREG-0800
Document ID: 7916b088-fb90-4163-84fe-027bd315bcc5
Document Type: srp
Title: REVIEW OF RISK INFORMATION USED TO SUPPORT PERMANENT PLANT-
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0717/ML071700658.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.2
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bsection II of this SRPsection. • In formulating the findings, the licensee should account for both probabilistic and traditional engineering considerations. This should include information from the risk analysis, traditional engineering evaluations and insights, quantitative sensitivity studies, operational experience and historical plant performance, engineering judgment, and current regulatory requirements. Potential limitations of the risk model should be identified and resolved. In addition, the licensee should individually consider and evaluate all SSCs that are affected by the proposed application but are not modeled in the PRA, on the basis of guidelines similar to those provided later in this appendix or in Section C.2 of Appendix C to this SRP section. Finally, the licensee's conclusions should be sufficiently robust with regard to different plausible assumptions and analyses. • When findings or conclusions depend, in part, on the use of compensatory measures, the licensee should justify why the compensatory measures are an appropriate substitute for a proposed relaxation in current requirements. The compensatory measures should also become part of the plant's licensing basis. Technical Information Basis for Applications Involving Risk Quantification or Risk Categorization The information base supplied to the integrated decisionmaking panel should be capable of supporting the findings that should be made in the context of the specific risk-informed application. For example, in risk quantification and risk categorization applications, the following guidelines should be applicable. • At least the Level 1 portion of the internal events PRA should be formulated in such a way as to support quantification of a change in risk (CDF and LERF) and importance measures, and should provide qualitative information (e.g., minimal cutsets) adequate to support defense-in-depth findings. • There should be an inventory of plant response capability for