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:
l Official.Mail@IAEA.Org. It should be noted that some of the international recommendations do not correspond to the requirements specified in the NRC’s regulations and the NRC’s requirements take precedence over the international guidance. RG 1.175, Page 8 pursuant to the Commission’s International Policy Statement (Ref. 13) and Management Directive and Handbook 6.6, “Regulatory Guides” (Ref. 14). The following IAEA Safety Standards incorporate similar design and preoperational testing guidelines and are consistent with the basic safety principles considered in developing this RG: • IAEA Safety Standard SSG-2, “Deterministic Safety Analysis for Nuclear Power Plants” (Ref. 15), provides general considerations of the adequacy of the provisions by deterministic safety analysis, complemented by probabilistic safety assessment and engineering judgement. • IAEA Safety Guide SSG-3, “Development and Application of Level 1 Probabilistic Safety Assessment for Nuclear Power Plants Specific Safety Guide” (Ref. 16), provides good practices in aspects of risk-informed approach to inservice testing to help optimize the risk assessment on inservice testing program. • IAEA Safety Standards SSR-2/1, “Safety of Nuclear Power Plants: Design” (Ref. 17), provides assurance that defense-in-depth has been implemented in the design of the plant. A safety analysis of the plant design should be performed in which methods of both deterministic and probabilistic analysis are included to assure the safety requirements are met throughout all stages of plant. These documents provide recommendations for performing or managing a probabilistic safety assessment for nuclear power plants and using the assessment to support safe design and operation. This RG discusses some of the same principles with respect to changes to a plant’s licensing basis. The NRC encourages licensees to consult these and other international documents noted throughout this regulatory guide and