Document: NUREG-0800
Document ID: c3ba2b86-3805-4144-9775-cd35b7bffe2d
Document Type: srp
Title: SYSTEM QUALITY GROUP CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1608/ML16084A884.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.2
CFR Part: 
CFR Title: 

Content:
latory 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 3.2.2-8 Revision 3 – July 2016 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 referenced and justified in an application. Certain additional systems not identified in RG 1.26 have established staff positions regarding quality group classification. These systems, and references establishing their acceptable classifications, are identified in Appendix A. 2. The information supplied in the application identifying application of the quality group classification criteria to fluid systems important to safety is reviewed for completeness, and the quality group classification, ASME BPV Code and code class, and quality assurance criteria of selected individual major component are checked for compliance with the above criteria. Safety functions