Document: NUREG-0800
Document ID: fb538e14-08a0-4d3f-a974-8170cbfe0b5b
Document Type: srp
Title: ASME CODE CLASS 1, 2, AND 3 COMPONENTS,
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340603.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.3
CFR Part: 
CFR Title: 

Content:
e taken into account in designing a component are specified in the Code, but rules specifying how the loadings, which result from postulated events and plant and system operating conditions, are to be combined and what stress level is appropriate for use with 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. C. POSITION Effective with the 1977 Edition, 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 MEB review and deter- mine maximum acceptable design and service stress limits which may be used with specified loads, or combinations thereof, for components and component supports of safety-related systems (refer to definition in Table III) and core support structures. This appendix provides guidance for dealing with the components and component supports of safety-related systems and core support structures in the following areas: (1) Consideration of design loadings and limits. (2) Consideration of service loading combinations resulting from postulated events and the designation of acceptable service limits. 3.9.3-13 Rev. 1 - April 1984 (3) Consideration of piping functional capability and operability of active pumps and valves under service loading combinations resulting from postulated events. (4) Applicability of the appendix to components, component support structures, and core support structures and procedures for compliance. 1.0 ASME CLASS 1, 2, AND 3 COMPONENTS AND COMPONENT SUPPORTS OF SAFETY-RELATED SYSTEMS AND CLASS CS CORE SUPPORT STRUCTURES 1.1 Design Considerations and Design Loadings ASME Code Class 1, 2, and 3 components, component supports, and class CS core support structures shall be designed to satisfy the