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:
aff’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 staff’s review, documentation of the evaluation process and findings are should be maintained. Additionally, the information submitted should include a description of the process used by the licensee to ensure its adequacy and specific information to support the licensee’s assertion that the RI- IST program would provide an acceptable level of quality and safety. 4.1 Licensee’s Risk-Informed Inservice Testing Submittal Documentation The licensee’s RI-IST alternative request should contain the following documentation: a. a request to implement an RI-IST program as an authorized alternative to the current NRC-approved OM Code pursuant to 10 CFR 50.55a(z)(1) for the current 120-month IST program interval; b. a description of the proposed RI-IST program (Regulatory Position C.1.1); c. a summary of key technical and administrative aspects of the overall RI-IST program that includes the following: RG 1.175, Page 27 (1) a description of the process used to identify candidates for reduced and enhanced IST requirements, including a description of the categorization of components using the PRA and the associated sensitivity studies (Regulatory Position C.2.2.3.2); (2) a description of 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 (Regulatory Position C.2.2.3.1); (3) a description of how the impact of the change is modeled in the IST components (including a quantitative or qualitative treatment of component degradation) and a description of the impact of the