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:
mmitments 3.9.7-1 6 Rev. 0-August 1998 associated with the proposed RI-IST program (e.g., changes to commitments made by the licensee in response to NRC Generic Letter 89-10 or 96-05). If the reviewer concludes that there is an "unacceptable" impact upon other commitments, then the reviewer must prepare a safety evaluation addressing why the commitment is necessary from a safety standpoint2. On a component-specific basis, the reviewer should evaluate the acceptability of each proposed change that affects plant design, operation, or other activities. A determination of acceptability should consider the original acceptance conditions, criteria, and limits, as well as the key principles identified in Section I.A.8 above. 2. IST Program Scope The reviewer should examine the proposed RI-IST program and verify the following: * For selected systems, components that perform a safety-related function(s) are in the proposed RI-IST program. * All components categorized by the licensee's integrated decision-making process as HSSC are included in the RI-IST program, regardless of their status in the licensee's current IST program. 3. Changes To Component Test Requirements By examining the licensee's material for a representative sample of components, the reviewer should verify that the licensee considered component design, service condition, and performance, as well as risk insights, in establishing the technical basis for each component's (or group of components) test strategy. The licensee's rationale for the proposed change in test interval and its relationship to expected time to failure should be reviewed. The reviewer should verify that the proposed test strategies are supported by applicable generic or plant- specific failure rate data. The reviewer should verify that proposed test intervals are less than the expected time to failure of the components in question. In addition, the reviewer should spot check the licensee's calculations or basis for concluding that adequate