Document: NUREG-0800
Document ID: 4e1d86bd-74a5-4678-8bc0-ffce3ba28ea0
Document Type: srp
Title: RISK-INFORMED INSERVICE TESTING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0428/ML042880272.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.7
CFR Part: 
CFR Title: 

Content:
lant design, operation, and other activities * the affect of proposed changes on the defense in depth philosophy and safety margins * the effect of the changed testing strategy on overall plant risk * the proposed implementation and monitoring strategies In Regulatory Position 4 of Regulatory Guide 1.175 the staff describes in more detail the documentation that the licensee should have submitted in conjunction with its proposed RI-IST program. 1. AREAS OF REVIEW A. ENGINEERING EVALUATION 1. Evaluation of Proposed Changes For all components affected by the proposed RI-IST program change, the licensee should have determined the acceptability of the proposed RI-IST program changes in light of the plant's design, operation, and other activities. 2. IST Program Scope The RI-IST program scope should include, in addition to components (e.g., pumps or valves) in the current code-prescribed program, any other components categorized HSSC that were identified as such as part of the PRA or licensee's integrated decision-making process (e.g., expert panel). 3. Changes To Component Test Requirements This section discusses test strategy changes (i.e., changes to component test frequency, methods, or both) that licensees should make as part of a RI-IST program. 3.9.7-3 Rev. 0-August 1998 4. Relief Requests and Technical Specification Amendments Although implementation of the licensee's RI-IST program (i.e., in lieu of implementing an 1ST program that is totally consistent with the ASME Code as endorsed in 10 CFR 50.55a) may be authorized by exemption from the regulations or via NRC authorizing an alternative pursuant to 10 CFR 50.55(a)(3), specific details of the licensee's RI-IST program may require exemptions from other regulations, technical specification changes, or require relief from provisions of NRC approved Codes. The licensee should have included in the RI-IST program submittal the necessary exemption requests, technical specification amendment requests, and relief