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:
e staff may request them to be made available for review at the applicant's or vendor's office. B. Use with Regulatory Guides. Regulatory Guides 1.124 and 1.130 on Class 1 linear and Class 1 plate and shell component support structures are supplemented by this appendix. 3.9.3-23 Revision 2 - March 2007 TABLE I Allowable Service Stress Limits for Specified Service Loading Combinations for ASME Section III Class 1, 2, and 3 Components, Component Supports, and Core Support Structures System Service Service Stress Plant Event2 Operating Conditions Loading Combination1,4 Limit ___________________________________________________________________________ 1. Normal Operation Normal Sustained Loads A 2. Plant/System Operating Transients (SOT) + OBE Upset Sustained Loads + SOT + OBE B3 3. DBPB Emergency Sustained Loads + DBPB C3 4. MS/FWPB Faulted Sustained Loads + MS/FWPB D3 5. DBPB or MS/FWBP + SSE Faulted Sustained Loads + DBPB or D3 MS/FWPB + SSE 6. LOCA Faulted Sustained Loads + LOCA D3 7. LOCA + SSE Faulted Sustained Loads + LOCA + SSE D3 NOTES:1The appropriate method of combination is subject to review and evaluation. Refer to SRP Section 1.2. 2Refer to Table II for definition of terms 3In addition to meeting the specified service stress limits for given load combinations, operability and functional capability should also be demonstrated as discussed in subsection 2.0 of this appendix and in SRP Section 3.10. 4These events must be considered in the pipe stress analysis and pipe support design process when specified in the ASME Code-required Design Specification. The Design Specification shall define the load and specify the applicable Code Service Stress Limit. For clarification, it should be noted that the potential for water hammer and water (steam) hammer occurrence should also be given proper consideration in the development of Design Specifications. 3.9.3-24 Revision 2 - March 2007 TABLE II DEFINITION OF TERMS Active Pumps and Valves - A pump or valve which must