Document: NRC Regulatory Guide
Document ID: 6f84e3bf-9ff3-49fb-a16a-0de3b89e6bc6
Document Type: regulatory_guide
Title: An Approach for Plant-Specific Risk-Informed Decisionmaking for Inservice Inspection of Piping (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2103/ML21036A105.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.178
CFR Part: 
CFR Title: 

Content:
des, and other relevant reports, reflects an international perspective on what constitutes a high level of safety. To inform its development of this RG, the NRC considered IAEA Safety Requirements and Safety Guides2 pursuant to the Commission’s International Policy Statement and Management Directive and Handbook 6.6 (Ref. 22). The following IAEA Safety Standards Series incorporate similar design and preoperational testing guidelines and are consistent with the basic safety principles considered in developing this Regulatory Guide: • IAEA Safety Standard SSG-2, “Deterministic Safety Analysis for Nuclear Power Plants,” issued 2019 (Ref. 23), provides general guidance on the adequacy of deterministic safety analysis, complemented by probabilistic safety assessments and engineering judgment. • IAEA Safety Guide SSG-3, “Development and Application of Level 1 Probabilistic Safety Assessment for Nuclear Power Plants—Specific Safety Guide,” issued 2010 (Ref. 24), provides good practices on aspects of a risk-informed approach to ISI to help optimize the risk assessment for inservice testing programs. • IAEA Safety Standard SSR-2/1, “Safety of Nuclear Power Plants: Design,” issued 2016 (Ref. 25), provides assurance that defense in depth has been implemented in the design of the plant. The safety analysis for the design of the nuclear power plant should include both deterministic and probabilistic analyses to ensure that all safety requirements are met throughout all stages of the lifetime of the plant. 2 Such information related to this guide may be found at WWW.IAEA.Org/ or by writing the International Atomic Energy Agency, P.O. Box 100 Wagramer Strasse 5, A 1400 Vienna, Austria; telephone (+431) 2600-0; fax (+431) 2600-7; or e mail 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