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:
sary to provide reasonable assurance that the component will remain operable over the test interval. Assurance must be established that degradation is not significant for components that are placed on an extended test interval, and that failure rates assumed for these components are not compromised. It must be clearly established that those test procedures and evaluation methods are implemented that reasonably ensure that degradation will be detected and corrective action will be taken. 3. Feedback and Corrective Action Program The licensee's corrective action program for this application is acceptable if it contains a performance-based feedback mechanism to ensure that if a particular component's test strategy is adjusted in a way that is ineffective in detecting component degradation and failure, particularly potential common cause failure mechanisms, the RI-IST program weakness is promptly detected and corrected. Performance monitoring should be provided for systems, structures, and components with feedback to the RI-IST program for appropriate adjustments when needed. The licensee's corrective action program should evaluate RI-IST components that either fail to meet the test acceptance criteria or are otherwise determined to be in a nonconforming condition (e.g., a failure or degraded condition discovered during normal plant operation). 3.9.7-14 Rev. 0-August 1998 The licensee's corrective action procedures should: * Comply with 10 CFR Part 50, Appendix B, Criterion XVI, "Corrective Action." * Determine the impact of the failure or nonconforming condition on system/train operability and follow the appropriate Technical Specification when component capability cannot be demonstrated. * Determine and correct the apparent or root cause of the failure or nonconforming condition (e.g., improve testing practices, repair or replace the component). The root cause of failure should be determined for all components categorized as having high safety significance, as well as