Document: NUREG-0800
Document ID: 817bb0ad-6fd7-433e-aa2b-b4b3e1166f9c
Document Type: srp
Title: PROBABILISTIC RISK ASSESSMENT AND SEVERE ACCIDENT EVALUATION FOR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0717/ML071700652.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
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CFR Title: 

Content:
nd their numerical values C Significant core damage sequences C Significant initiating events C Significant functions, SSCs, and operator actions C PRA assumptions and PRA-based insights C Results and insights from importance, sensitivity, and uncertainty analyses ii. Significant Large Release Sequences and their numerical values C Significant large release sequences C Significant initiating events C Significant functions, SSCs, and operator actions C Containment performance C PRA assumptions and PRA-based insights C Results and insights from importance, sensitivity, and uncertainty analyses The PRA staff should also review the overall/integrated results and insights from the design-specific/plant-specific PRA. In particular, the staff should review the applicant’s identification of significant plant features (including nonsafety-related systems) and operator actions that are important to reduce risk and confirm that the plant will meet the expectation stated in 10 CFR 52.79(a)(2) that “... reactors will reflect through their design, construction and operation an extremely low probability for accidents that could result in the release of significant quantities of radioactive fission products.” In addition, for a COL referencing a DC, the staff should compare the COL applicant's PRA-based insights table with the table from the DC to identify potential changes that could impact the PRA results and insights and to verify that the applicant has properly dispositioned each insight. SRP Section 19.1, which is associated with Regulatory Guide 1.200, provides additional information regarding the review of the technical adequacy of a design-specific/plant-specific PRA. SRP Section 19.1 specifically provides review guidance on determining PRA technical adequacy, and Regulatory Guide 1.200 presents an acceptable approach for determining that the quality of the applicant’s PRA is sufficient to provide confidence in the results. In particular, Section C.1 of Regulatory