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:
al, design, or maintenance conditions). l For example, the MOV exercise requirement (which is comparable to the current stroke time test) should be performed at intervals considerably smaller than the expected time to failure. 3.9.7-8 Rev. 0 - August 1998 The testing strategy for each component (or group of components) in the licensee's RI-IST program should be described in the RI-IST program description. The RI-IST program description should summarize all testing to be performed on a group of components (e.g., motor-operated valve (MOV) testing in response to NRC Generic Letter 96-05 (Ref.7)). The specific testing to be done on each component (or group of components) should be delineated in the licensee's IST program plan and is subject to NRC inspection. 4. Relief Requests and Technical Specification Amendments The following are to be approved by the NRC before implementing the RI-IST program: * A relief request for any component, or group of components, that is not tested in accordance with the licensee's ASME Code of record or NRC-approved ASME Code Case. * A technical specification amendment request for any component, or group of components, if there are changes from technical specification requirements. 5. Scope, Level of Detail, and Quality of the PRA for IST Application To be acceptable for application to RI-IST, PRA models must reflect the as-built, as-operated plant, and they must have been performed in a manner that is consistent with accepted practices. The quality of the PRA has to be shown to be adequate, commensurate with the role the PRA results play in justifying changes to the test intervals or strategies. While a full-scope PRA, covering all modes of operation and initiating events is preferred, a lesser scope PRA can be used to provide risk information, but it must be supplemented by additional considerations during the integrated decisionmaking process. Regulatory positions for the required PRA quality and scope are further defined in Regulatory