Document: NUREG-0800
Document ID: 3cba9156-8408-4723-86f6-043cf1a52e64
Document Type: srp
Title: COMPLIANCE WITH THE CODES AND STANDARDS RULE, 10 CFR 50.55a
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0700/ML070040003.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.1.1
CFR Part: 
CFR Title: 

Content:
5.2.1.1-2 Revision 3 - March 2007 requires that RCPB pressure-retaining components meet requirements for Class 11 components and be constructed2 in accordance with the rules of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, Section III, Division 1 (hereafter the Code), except for components which meet the exclusion requirements of 10 CFR 50.55a(c). RCPB components which meet the exclusion requirements may be classified as Quality Group B in accordance with Regulatory Guide (RG) 1.26 and constructed as Class 2 components in accordance with the Code. The Codes and Standards Rule also requires that safety-related pressure-retaining components of other fluid systems designated as Quality Group B or Quality Group C meet code requirements for Class 23 or Class 3 components, respectively. To meet these requirements, components of other safety-related fluid systems may be classified as Quality Group B, C, or D in accordance with RG 1.26, which is acceptable guidance for determining the appropriate code class for most non-RCPB pressure- retaining components. Review of Quality Group B, C, or D components of other safety-related fluid systems is under Standard Review Plan (SRP) Section 3.2.2. For construction permit, standard design certification (DC), and operating license applications, the staff determines the acceptability of the SAR to ensure that the applicant complies with 10 CFR 50.55a. 2. Where compliance with the Codes and Standards Rule would result in hardships or unusual difficulties without a compensating increase in the level of safety and quality, the applicant must describe the complete circumstances and the basis for the proposed alternate requirements. The applicant must describe how the proposed alternate requirements provide an equivalent and acceptable level of safety and quality. The SAR should identify differences between the specific portions of the code and code addenda to which each component has been constructed