Document: NRC Regulatory Guide
Document ID: 70415715-297f-4d60-841c-514b0372a131
Document Type: regulatory_guide
Title: 02/2017 (Rev. 5)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1608/ML16082A501.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.26
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CFR Title: 

Content:
mic Energy Agency (IAEA) has established a series of safety guides and standards constituting a high level of safety for protecting people and the environment. IAEA safety guides present international good practices and increasingly reflect best practices to help users striving to achieve high levels of safety. Pertinent to this RG, IAEA Specific Safety Guide SSG-30, “Safety Classification of Structures, Systems and Components in Nuclear Power Plants” (Ref.11), provides recommendations and guidance for identifying and classifying SSCs important to safety on the basis of their function and safety significance. SSG-30 provides high level guidance for developing safety categories and safety classes of SSCs in nuclear power plants with the use of probabilistic risk assessment considerations in the safety classification process. This RG also addresses classification of SSCs according to their safety significance and is consistent with the basic safety principles provided in SSG-30, though the implementation details are different. As described below in Section D, use of this alternative classification approach instead of the approach presented in this guide may be deemed acceptable if an applicant or licensee provide sufficient basis and information for the NRC staff to verify that the proposed alternative demonstrates compliance with GDC 1 and 10 CFR 50.55a. Documents Discussed in Staff Regulatory Guidance This RG approves for use, in part, the use of one or more codes or standards developed by external organizations, and other third party guidance documents, some of which (e.g., portions of the ASME BPV Code) have been incorporated by reference into NRC regulations as a requirement. These codes, standards and third party guidance documents may contain references to other codes, standards or third party guidance documents (“secondary references”). If a secondary reference has itself been incorporated by reference into NRC regulations as a requirement, then