Document: NUREG-0800
Document ID: 22884f18-189e-46a8-81b2-45db11edf145
Document Type: srp
Title: SYSTEM QUALITY GROUP CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1422/ML14227A641.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.2
CFR Part: 
CFR Title: 

Content:
ould be cited in Tier 2 rather than Tier 1. SRP Section 5.2.1.1 provides additional information on staff review of code and standard information. Selection and emphasis of various aspects of the areas covered by this SRP section will be made by the reviewer on each case. The reviewer’s judgment with respect to the areas to be given attention during the review is to be based on an inspection of the material presented, on the similarity of the material to that recently reviewed for other plants, and on whether items of special safety significance are involved. 1. The staff reviews the classification criteria presented in the FSAR and consistency of that criteria with regulations and regulatory guidance. Regulations in 10 CFR 50.55a identify those ASME Section III, Code Class 1 components of light-water-cooled reactors that are part of the RCPB. The detailed review of these components is conducted by the reviewer under other SRP sections as described in Subsection I. These components are designated in RG 1.26 as Quality Group A. In addition, RG 1.26 identifies, on a functional basis, water- and steam-containing components of those systems important to safety that are designated as Quality Groups B and C. Quality Group D applies to water- and steam-containing components of systems that are less safety-significant and may have different safety standards commensurate with their importance to safety. An applicant should use the NRC group classification system identified in RG 1.26. Any alternative approaches, such as the corresponding American Nuclear Society (ANS) classification system of Safety Classes, should be justified and cross-referenced with the classification groups in RG 1.26. Although the NRC does not currently endorse ANS classification standards (e.g., ANS 51.1, 52.1, and ANS 58.14), reference documents such NUREG/CR-5973, “Codes and Standards and Other Guidance Cited in Regulatory Documents”, can support identifying industry standards that can be