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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needed to support the application have been appropriately identified and (2) those parts have been performed in a manner consistent with current good PRA practice. The former needs to be addressed as part of the assessment of the application. The latter can be met by determining that the necessary parts of the PRA have been performed in accordance with the staff position on consensus PRA standards or industry programs as documented in the appendices to Regulatory Guide 1.200. Where there are differences in approach to performing a specific part, the staff must determine that the approach used by the applicant is either equivalent to, or better than, that supported by the staff position. III. REVIEW GUIDANCE AND PROCEDURES The objective of this SRP is to provide guidance to the NRC staff on how to determine that the PRA results being used in a decision are supported by the underlying analysis. It must be clear that the elements of the model used to generate those results are of sufficient technical quality and that the assumptions and uncertainties that have the potential to affect the results have been evaluated as being appropriate. III.1 Scope of Review In order to perform the review for quality, the reviewer should first understand the context in which the PRA is being used. III.1.1 Use of the PRA in the Application The reviewer should become familiar with the way the PRA is used in the application. This includes: • identification of the SSCs, operator actions, and plant operational characteristics affected by the application • a description of the cause-effect relationships between the change and the above SSCs, operator actions, and plant operational characteristics • mapping of the cause-effect relationships onto PRA model elements 6 • definition of the acceptance criteria or guidelines, including identification of the PRA results that will be used to compare against the acceptance criteria or guidelines and how the comparison is to be made. III.1.2