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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Content:
al should also identify the SSCs for which performance should be verified (including non-safety-related SSCs for which performance and reliability provide part of the basis for the LB change). III.4.2 Considerations Related to the National Environmental Policy Act In accordance with 10 CFR Part 51, reviewers should address environmental protection regulations, such as those from the National Environmental Policy Act (NEPA). Reviewers should use NRR Office Letter 906 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 reviewers can reach a finding of no significant impact (FONSI). It is expected that, if all of the guidance and acceptance criteria provided in Regulatory Guide 1.174 are satisfied, the reviewers should normally be able to reach such a finding for the proposed change. 19.2-28 June 2007 Table III-1 (page 1 of 5) Questions To Assist in Establishing the Cause-Effect Relationship Note: Information from Section 3.3 of the EPRI “PSA Applications Guide” (EPRI-TR-105396) provided substantial input to this table. LEVEL 1 (INTERNAL EVENTS PRA) Initiating Events • Does the application introduce new initiating events? • Does the application address changes that lead to a modification of the initiating event groups? • Does the application necessitate reassessment of the frequencies of the initiating event groups? • Does the application increase the likelihood of a system failure that was bounded by an initiating event group to the extent that it needs to be explicitly considered? Success Criteria • Does the application necessitate modification of the success criteria? • Does the modification of success criteria necessitate changes in other criteria, such as system interdependencies? Event Trees • Does the application address an issue that can be associated