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:
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 appropriate sub- sections of the Code in all respects, including limitations on pressure, and the requirements of this appendix. Component supports that are intended to restrain either force and displacement or anchor movement shall be designed to maintain deformations within appropriate limits as specified in the component support Design Specifications. Design loadings shall be established in the Design Specification. The design limits of the appropriate subsection of the Code shall not be exceeded for the design loadings specified. 1.2 Service Loading Combinations The identification of individual loads and the appropriate combination of these loads (i.e., sustained loads, loads due to system operating transients SOT, OBE, SSE, LOCA, DBPB, MS/FWPB and their dynamic effects) shall be in accordance with Section 1.3. The appropriate method of combination of these loads shall be in accordance with NUREG-0484, "Methodology for Combining Dynamic Loads" (Reference 9). 1.3 Service Conditions 1.3.1 Service Limit A Class 1, 2, and 3 components, component supports, and Class CS core support structures shall meet a service limit not greater than Level A when subjected to sustained loads resulting from normal plant/system operation. 1.3.2 Service Limit B Class 1, 2, and 3 components, component supports, and Class CS core support structures shall meet a service limit not greater than Level B when subjected to the appropriate combination of loadings resulting from (1) sustained loads, (2) specified plant/system operating transients (SOT), and (3) the OBE. 1.3.3 Service Limit C (a) Class 1, 2, and 3 components, component supports, and Class CS core support structures shall meet a service limit not greater than Level 3.9.3-14 Rev. 1 - April 1984 C when subjected to the appropriate