Document: NUREG-0800
Document ID: e32f0820-4e33-476e-aa36-4ca8c2c64af0
Document Type: srp
Title: Use of Probabilistic Risk Assessment in Plant-Specific, Risk-Informed Decisionmaking:
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0119/ML011940192.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.0
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re that the proposed changes, when approved by the staff, will be appropriately included in future updates to the licensee's safety analysis report. In addition, the licensee should identify important assumptions (including SSC functional capabilities and performance attributes) which play a key role in supporting the acceptability of the LB change. Since the continued satisfaction of these assumptions is necessary to maintain the validity of the safety evaluation, reviewers should verify that such assumptions are reflected by licensee commitments which are incorporated into the safety analysis report. Reviewers should also verify that the licensee has submitted revised FSAR pages, as necessary. This revision should include all the programmatic activities, performance monitoring aspects, and SSC functional performance and availability attributes which form the basis of the request. This material should also identify those SSCs for which performance should be verified (including nonsafety-related SSCs for which performance and reliability provide part of the basis for the LB change). Considerations Related to the National Environmental Policy Act In accordance with 10 CFR Part 51, the staff's review process should address environmental protection regulations, such as those from the National Environmental Policy Act (NEPA). Reviewers should use NRR Office Letter 906, Revision 1, and 10 CFR 51.25 to determine how the NEPA requirements are to be addressed. If it is determined necessary, an environmental assessment (EA) should be prepared to assess whether an environmental impact statement (EIS) is required, or whether the staff can reach a finding of no significant impact (FONSI). It is expected that, if all of the guidance and acceptance criteria provided in RG 1.174 are satisfied, the staff should normally be able to reach such a finding for the proposed change. SRP 19-29 Table I11-1 (page 1 of 3) Questions to Assist in Establishing the Cause-Effect Relationship4