Document: NRC Regulatory Guide
Document ID: 47b09be1-4bf8-45f9-a099-7fed871c09bd
Document Type: regulatory_guide
Title: Plant-Specific, Risk-Informed Decisionmaking: Inservice Testing (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2114/ML21140A055.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.175
CFR Part: 
CFR Title: 

Content:
es not need to report the results of the RI-IST corrective actions to the NRC (except as required by specific NRC reporting requirements), but should retain them on-site for inspection. RG 1.175, Page 26 3.5 Periodic Reassessment RI-IST programs should contain provisions to periodically feed component performance data back into both the component categorization and component test strategy determination (i.e., test interval and methods) processes. Such assessments should also consider corrective actions that have been taken on past IST program components. (This periodic reassessment should not be confused with the 120-month program updates required by 10 CFR 50.55a(f)(5)(i), whereby the licensee’s IST program must comply with later versions of the OM Code that have been approved by the NRC.) The assessment should address the following: a. Review and revise as necessary the models and data used to categorize components to determine whether component groupings have changed. b. Reevaluate equipment performance to determine whether the RI-IST program should be adjusted (based on both plant-specific and generic information). The licensee should have procedures in place to identify the need for more emergent RI-IST program updates (e.g., following a major plant modification or following a significant equipment performance problem). Licensees may wish to coordinate these reviews with other related activities, such as periodic PRA updates, industry operating experience programs, the Maintenance Rule program, and other risk-informed program initiatives. The test strategy for RI-IST components should be periodically assessed to reflect changes in plant configuration, component performance, test results, and industry experience. 4. Element 4: Submit Proposed Change The NRC staff’s review of the RI-IST program is to ensure that the analyses conducted by the licensee were sufficient to conclude that the key principles of risk-informed regulation are met. To facilitate the