Document: NUREG-0800
Document ID: 6237521d-c825-4ed6-8fb7-7b3b8019a3fc
Document Type: srp
Title: SYSTEM QUALITY GROUP CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070297.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.2
CFR Part: 
CFR Title: 

Content:
y group classified consistent with the positions of Regulatory Guide 73 1.26. Portions of the system that perform a safety-related function. 2 Portions of the system to outermost containment isolation valve. 3 Includes makeup water systems as described in SRP Section 9.1.3. 4 74 Refers to the relief valves providing RCPB overpressure protection. 5 75 See Appendix C for supplemental classification guidance. 6 76 In the event an applicant intends to take exception to Regulatory Guide 1.26 and has not provided adequate justification for histhe proposed quality group classification, questions are 77 prepared by the staff which may require additional documentation or an analysis to establish an acceptable basis for histhe proposed quality group classification. Staff comments may also be 78 prepared requesting clarification, in order to assure a clear understanding of the quality group classifications assigned to a system by the applicant. Exceptions and alternatives to the specified quality group classifications of Regulatory Guide 1.26 or the guidance identified in Appendix C are unacceptable unless application of an 79 80 "equivalent quality level" is justified. In such cases, justification can be demonstrated if: the component is classified to meet the requirements of a higher group classification than specified in Regulatory Guide 1.26 or alternative design rules are based on the use of a more conservative design; the extent of component nondestructive examination is equal to or greater than required by the specified code; and the quality assurance requirements of Appendix B, 10 CFR Part 50 are met. DRAFT Rev. 2 - April 1996 3.2.2-8 If the staff's questions are not resolved in a satisfactory manner, a staff position is taken requiring conformance to Regulatory Guide 1.26. For standard design certification reviews under 10 CFR Part 52, the procedures above should be followed, as modified by the procedures in SRP Section 14.3 (proposed), to verify that the design set