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:
ts that would be affected by the proposed changes in IST program * the plant systems involved with the proposed changes * the change in testing strategy (i.e., test frequency and methods) proposed for each component or group of components 3.9.7-26 Rev. 0 - August 1998 * the affect of proposed RI-IST program on the design, operation, and other activities of the plant * the affect of the proposed changes on the defense in depth philosophy and safety margins * the overall affect of the changed testing strategy on plant risk * the proposed implementation and monitoring strategies A. ENGINEERING EVALUATION 1. Evaluation of Proposed Changes The reviewer should verify that sufficient information is provided in accordance with the requirements herein and that the evaluation supports conclusions of the following type, to be included in the staffs safety evaluation report: On a component-specific basis, the NRC staff has reviewed each IST program change as it affects the design, operation, and other activities of the plant. In conducting its review, the staff considered the original acceptance conditions, criteria, and limits, as well as the key principles identified in Section 2 of Regulatory Guide 1.174. Due consideration was given to diversity, redundancy, defense in depth, safety margins, and other aspects of the General Design Criteria. Having conducted this review, the staff finds that the RI-IST program changes proposed by the licensee are acceptable. 2. IST Program Scope The reviewer should verify that sufficient information is provided in accordance with the requirements herein and that the evaluation supports conclusions of the following type, to be included in the staffs safety evaluation report: The staff concludes that the scope of the licensee's RI-IST program is acceptable because it includes, 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