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:
sideration. In addition, the procedures used to determine the ISI program for piping that are subject to ISI under ASME XI requirements but have no segments or piping structural elements exceeding the screening criteria are reviewed to ensure that they are in accordance with the acceptance criteria of Section II.2.3 of this SRP. III.3 Element 3: Implementation and Monitoring Programs The reviewer verifies that the inspection strategies address failure mechanisms of concern and that there is a sufficiently high probability of detecting damage before structural integrity is compromised. The reviewer verifies that the degradation mechanisms, postulated failure modes, and configuration of piping structural elements are incorporated in the definition of the inspection scope and inspection locations. Selected inspection locations are reviewed to confirm that stress concentration, geometric discontinuities, and terminal ends are considered in establishing the inspection locations. In addition, the reviewer verifies that plant-specific pipe cracking experience has been considered in selecting inspection locations. The reviewer also determines whether alternative examination methods are specified to ensure structural integrity when examination methods cannot be applied due to limitations, such as inaccessibility or radiation exposure hazard. The RI-ISI program is reviewed to ensure that system pressure tests and visual examination of piping structural elements is to be performed on all Class 1, 2, and 3 systems in accordance with ASME B&PVC Section XI Program, regardless of whether the segments contain locations that have been classified as safety significant 3.9.8-19 or low safety significant. The RI-ISI program is reviewed to ensure that safety-significant non-Code Class piping is treated as ASME Code Class piping for purposes of examination and pressure testing. The sample selection process is examined to verify that expansion of the sample size is in accordance with the