Document: NUREG-0800
Document ID: 2ab6f47e-1578-451d-b6ad-29434e31a72b
Document Type: srp
Title: SYSTEM QUALITY GROUP CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340619.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.2
CFR Part: 
CFR Title: 

Content:
e As above API-620 Tanks Supports As above except As above except As above except Manufacturers standards Subsection NF Subsection NF Subsection NF Metal Containment Not applicable As above except Not applicable Not applicable Components Subsection NE, Class MC Core Support Not applicable As above except Not applicable Not applicable Structures Subsection NG NOTES: IAs defined in Subsubarticle NCA-111O of Section III, of the ASME Boiler and Pressure Vessel Code, construction is an all-inclusive term comprising materials, design, fabrication, examination, testing, inspection, and certification required in the manufacture and installation of components. 2As defined in Regulatory Guide 1.26, the NRC Quality identifies on a functional basis components of fluid Groups A, B, C, and D. Classification System systems by Quality 3See Section with regard 50.55a, "Codes and Standards," of 10 CFR Part 50 for guidance to the Code Edition and Addenda to be applied I 4The specific applicability of ASME Code Cases is covered separately in SRP Section 5.2.1.2, Regulatory Guides 1.84 and 1.85, or in Commission regula- tions, where appropriate. Applicants proposing the use of ASME Code Cases not covered by these SRP and Regulatory Guides should receive approval from the Commission prior to their use and should demonstrate that an acceptable level of quality and safety would be achieved. 3.2.2-9 Rev. 1 - July 1981 APPENDIX A* CLASSIFICATION OF MAIN STEAM COMPONENTS OTHER THAN THE REACTOR COOLANT PRESSURE BOUNDARY FOR BWR PLANTS A. BACKGROUND A pipe classification of "D + QA" for main steam line components of BWR plants was proposed by the General Electric Company in 1971 as an alternative to Quality Group B and has been accepted by the staff in a number of licensing case reviews. However, we have recently identified a number of potential problems which are applicable to main steam lines of BWR plants. These problems relate to postu- lated breaks in high-energy fluid-containing lines