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:
s are for the implementation, monitoring, and corrective action programs for the accepted RI-ISI program plan: a. The evaluation of the implementation program will be based on the attributes presented in Sections C.3.1 through C.3.3 of this guide. b. The corrective action program should provide reasonable assurance that a nonconforming component will be brought back into conformance in a timely fashion. The corrective actions required in ASME BPV Code, Section XI, should continue to be followed. c. Evaluations within the corrective action program may also include the following: (1) Ensure that the root cause of the condition is determined and that corrective actions are taken to preclude repetition. The identification of the significant condition adverse to quality, the cause of the condition, and the corrective action are to be documented and reported to appropriate levels of management. (2) Determine the impact of the failure or nonconformance on system or train operability since the previous inspection. (3) Assess the applicability of the failure or nonconforming condition to other components in the RI-ISI program. (4) Correct other susceptible RI-ISI components as necessary. (5) Incorporate the lessons in the plant data base and computer models, if appropriate. (6) Assess the validity of the failure rate and unavailability assumptions that can result from piping failures used in the PRA or in support of the PRA. RG 1.178, Page 22 (7) Consider the effectiveness of the component’s inspection strategy in detecting the failure or nonconforming condition. The inspection interval would be reduced, or the inspection methods adjusted, as appropriate, when the component (or group of components) experiences repeated failures or nonconforming conditions. d. The corrective action evaluation should be provided to the licensee’s PRA and RI-ISI groups so that any necessary model changes and regrouping are done, as appropriate. e. The RI-ISI program documents should be