Document: NUREG-0800
Document ID: b07c8dd1-23f6-41f1-a3ba-aa378f9ea59a
Document Type: srp
Title: RISK-INFORMED INSERVICE INSPECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0325/ML032510135.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.8
CFR Part: 
CFR Title: 

Content:
onsistently applied and that the results of the analysis are well documented. Guidelines for evaluating the consequence of different leak sizes and selecting the most severe consequence should also be reviewed if applicable. III.2.2.6 Risk Impact of ISI Changes The risk impact of the proposed change in the ISI program is reviewed for compliance with the acceptance criteria in Section II.2.2 of this SRP section. The assessed change in risk due to ISI implementation should be evaluated in accordance with the guidelines in Section 2.2.2, “Evaluation of Risk Impact, Including Treatment of Uncertainties,” of Regulatory Guide 1.174. The licensee's risk assessment is reviewed to verify that any proposed increases in CDF and risk are small and are consistent with the intent of the Commission’s Safety Goal Policy Statement. Selection of piping segments is reviewed to ensure that assumptions guiding the spatial effects of pipe failures are applied consistently. It should reflect the current plant ISI program, and risk insights developed should arise from comparing the baseline with the proposed RI-ISI program implementation plant risk. 3.9.8-18 Risk insights are reviewed to ensure that they appropriately account for the change in the number of elements inspected and, when feasible, the effects of an enhanced inspection method. The emphasis put on the risk insights and on the PRA results in the decisionmaking process is determined. The PRA is reviewed to verify that the scope, level of detail, and the quality of the PRA is commensurate with the role the risk and the change in risk results play in determining the acceptability of the requested ISI program. III.2.3 Integrated Decisionmaking Acceptance criteria for an integrated decisionmaking process are given in Section II.2.3. The process by which the traditional engineering analysis addresses the relevant regulations and the currently approved requirements of the plant is reviewed to confirm that the regulations are met