Document: NUREG-0800
Document ID: ac43f632-9db1-4857-9f56-bfba45965456
Document Type: srp
Title: * These are modifications to a plant’s design, operations, or other activities that require NRC approval. These modifica
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0232/ML023250195.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19
CFR Part: 
CFR Title: 

Content:
bilistic Risk Assessment for Nuclear Power Plant Applications: Low Power and Shutdown." In addition, the various engineering professional societies are considering developing a Standard for performing a fire PRA. SRP 19-18 staff in connection with those examinations, as well as the licensee’s responses to those RAIs, and the staff evaluation reports regarding the licensee’s IPE and IPEEE submittals. Reviewers could reach a finding that previous industry or staff reviews are sufficient to show that the PRA is of adequate quality in one or more of the review areas for the present application. In such cases, the scope of the review should be adjusted accordingly. However, reviewers should be aware of potential application-specific differences and of the currency of the previous review findings with respect to the current plant design and operating procedures. It should be noted that the NRC has not developed its own formal standards nor has it yet endorsed an industry standard for PRAs submitted in support of applications for changes to a plant’s LB that are covered by this Standard Review Plan chapter. However, the NRC continues to support ongoing initiatives to develop such standards and expects that ultimately PRA standards will be developed and endorsed by the NRC that are suitable for regulatory decisionmaking as described in this Standard Review Plan chapter. Currently under development are standards for internal events, external events (e.g., seismic, high winds, and external flooding), and low power and shutdown modes of operation.* III.2.2.4.2 Quality Assurance Requirements Related to the PRA To the extent that a licensee elects to use PRA as an element to enhance or modify its implementation of activities affecting the safety-related functions of SSCs, appropriate quality requirements will also apply to the PRA. In this context, therefore, a licensee would be expected to control PRA activity in a manner commensurate with its impact on the facility’s