Document: NUREG-0800
Document ID: 4e1d86bd-74a5-4678-8bc0-ffce3ba28ea0
Document Type: srp
Title: RISK-INFORMED INSERVICE TESTING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0428/ML042880272.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.7
CFR Part: 
CFR Title: 

Content:
antifying the basic event probabilities, rather than resolving the equations with the higher values. In addition, because of the simultaneous increase in basic event probabilities associated with like components, it is important to consider the impact of parameter uncertainties and the state-of-knowledge correlation. This can be done by either propagating uncertainties or showing that the contributing cutsets will not be affected by this correlation. 8. Integrated Decisionmaking If the licensee's submittal regarding changes to component test strategies meets the acceptance guidelines as specified in Section II, the submittal could be deemed to have used an integrated decisionmaking process which ensures that the principles and expectations of risk-informed regulation are met. This section provides procedures for the overall review of the different elements of the integrated decisionmaking, and how these elements can complement or compensate for others. The licensee's records should clearly identify all factors considered in the decision process and the basis for the proposed changes to the IST program. On a sampling basis, the reviewer should conduct an independent evaluation to determine whether the licensee's conclusion is technically sound. The reviewer's determination that the proposed alternative will provide "an acceptable level of quality and safety" [Ref. 10 CFR 50.55a (a)(3)(i)] should be based on this independent assessment. The review of the proposed IST program change is discussed in Section III.A.1 and the requirements for an exemption or a relief request associated with are discussed in Section III.A.4. In evaluating the process for defining the overall change, reviewers should determine whether the licensee has used an approach where risk insights were also used to improve test strategies, and not just to relax testing requirements. This is discussed more in Sections III.A.2 and III.A.3 under the review of program scope and strategy. In evaluating the