Document: NRC Regulatory Guide
Document ID: 47b09be1-4bf8-45f9-a099-7fed871c09bd
Document Type: regulatory_guide
Title: Plant-Specific, Risk-Informed Decisionmaking: Inservice Testing (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2114/ML21140A055.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.175
CFR Part: 
CFR Title: 

Content:
n the PRA results. c. The resource information base should include other qualitative or quantitative analyses that shed light on the relative safety importance of components, such as failure modes and effects analyses, shutdown risk, seismic risk, and fire protection. d. Attention should be given to the fact that component performance can be degraded from the effects of aging or harsh environments; this issue will need to be addressed and documented. e. The engineering evaluation should include the choice of new test frequencies, the identification of compensatory measures for potentially important components, and the choice of test strategies for both high safety-significant components and low safety-significant components. f. IST tests should be evaluated before choosing the test methods to be used for the high safety-significant components and low safety-significant components, depending on the components’ expected failure modes, service conditions, and other factors. g. Because of the importance of maintaining defense-in-depth, particular attention should be given to identifying any containment systems involving IST components. h. The RI-IST application should include stepwise program implementation, as discussed in Regulatory Position C.3.2, as part of the licensee’s integrated decisionmaking process. DG-1286, Appendix A, Page A-3 i. The RI-IST application should include the licensee’s performance-monitoring approach, as discussed in Regulatory Position C.3.3, as part of the licensee’s decisionmaking process. NUREG-0800, “Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants: LWR Edition,” Chapter 19, “Severe Accidents,” provides additional issues of a more general nature that may arise in expert panel deliberations.