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:
d in detail in Regulatory Guide 1.174. The licensee’s processes, procedures, and decision 3.9.8-6 criteria to integrate, and to iterate on the integration as necessary, the different elements of the engineering analysis discussed in Sections I.2.1 and I.2.2 and the key principles are reviewed. The assignment of pipe elements into safety-significant categories is an integral part of the risk- informed ISI process. Consequently, the categorization process and all qualitative and quantitative guidelines used to support the categorization are also reviewed. Risk measures used to characterize and differentiate the risk contributions from the individual piping segments are reviewed. The techniques, criteria, and documentation used to develop and describe the risk measures are reviewed. The criteria for using these risk measures to categorize the safety significance of each pipe segment are reviewed. Consideration of absolute and relative figures of merit is reviewed. Review is focused on the criteria for risk significance determination for ISI at the pipe segment and structural element levels that are used to prioritize inspection locations. The procedure used to perform review of piping segments and piping structural elements to ensure that segments are appropriately ranked is reviewed. The criteria and procedure used to define the number and location of structural elements within the piping segments that will be subject to ISI are reviewed. The comparison between the ISI program for piping under ASME B&PVC Section XI and the requested RI-ISI program is reviewed. I.3 Element 3: Implementation and Monitoring Programs The adequacy of the implementation and monitoring plans is reviewed. Inspection strategies are reviewed to ensure that failure mechanisms of concern have been addressed and there is a sufficiently high probability of detecting damage before structural integrity is impacted. The process by which the safety significance of piping segments is taken into