Document: NUREG-0800
Document ID: 3d8f7691-e488-4083-af2f-eef689c0ec98
Document Type: srp
Title: ASME CODE CLASS 1, 2, AND 3 COMPONENTS AND COMPONENT SUPPORTS,
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0704/ML070430397.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.3
CFR Part: 
CFR Title: 

Content:
ated events and plant and system operating conditions) are to be combined, and what stress level is appropriate for use with a particular loading combinations, are not specified in the Code. It is the responsibility of the designer to include all this information in the Code required Design Specification of each component and support. 3. POSITION The Code provides design stress limits and four sets of service stress limits for all classes of components, component supports, and core support structures. The availability of such design and service stress limits within the Code requires that the 3.9.3-19 Revision 2 - March 2007 primary reviewer should review and determine maximum acceptable design and service stress limits which may be used with specified loads, or combinations thereof, for components and component supports (refer to definition in Table II) and core support structures. This appendix provides guidance for reviewers on the following subjects regarding Code Class 1, 2, and 3 components and component supports, and core support structures: A. Consideration of design loadings and limits. B. Consideration of service loading combinations resulting from postulated events and the designation of acceptable service limits. C. Consideration of functional capability and operability of piping and active pumps and valves under service loading combinations resulting from postulated events. D. Applicability of the appendix to components, component support structures, and core support structures and procedures for compliance. 4. ASME CLASS 1, 2, AND 3 COMPONENTS, COMPONENT SUPPORTS, AND CORE SUPPORT STRUCTURES A. Design Loadings and Design Limits. Code Class 1, 2, and 3 components and component supports, and core support structures, shall be designed to satisfy the appropriate subsections of the Code as required in 10 CFR 50.55a, including limitations on pressure, and including the requirements of this appendix. Component supports shall be designed to maintain