Document: NRC Regulatory Guide
Document ID: 6f84e3bf-9ff3-49fb-a16a-0de3b89e6bc6
Document Type: regulatory_guide
Title: An Approach for Plant-Specific Risk-Informed Decisionmaking for Inservice Inspection of Piping (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2103/ML21036A105.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.178
CFR Part: 
CFR Title: 

Content:
be inspected. (5) List the equipment assumed to fail as a direct or indirect consequence of each segment’s failure (if segments contain welds with different failure consequences, for each weld). (6) Describe how the impact of the change between the current ASME BPV Code, Section XI, and the proposed RI-ISI programs is evaluated or bounded and how this impact compares with the risk guidelines in Section C.2.4 of RG 1.174. g. Describe the means by which failure probabilities, frequencies, or potential were determined. h. Describe the PRA used for the categorization process and for the determination of risk impact, in terms of the process to ensure acceptability of the scope, level of detail, conformance with the technical elements of the PRA standard, and plant representation of the PRA, and how limitations in these qualities are compensated for in the integrated decisionmaking process. Section C.6.3 of RG 1.174 provides detailed discussions of this. i. If the submittal includes modified inspection intervals, submit the methodology and results of the analysis. j. Describe the implementation, performance monitoring, and corrective action strategies and programs in sufficient detail for the staff to understand the new ISI program and its implications. k. Provide the applicable documentation discussed under the cumulative risk documentation for submittal in Section C.6.3.2 of RG 1.174. RG 1.178, Page 25 l. Refer to NRC-approved topical reports on implementing the RI-ISI program and supporting documents. Clearly identify any variations from the topical reports and supporting documents. 4.2 Archival Documentation The licensee should maintain at its facility the technical and administrative records used in support of its submittal or should be able to generate the information on request. This information should be available for NRC review and audit. If changes are planned to the ISI program based on internal procedures and without prior NRC approval, the licensee should