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:
, "Seismic and Dynamic Qualification of Mechanical and Electrical Equipment Important to Safety." 5. Appendix A to SRP Section 3.9.3, "Stress Limits for ASME Class 1, 2, and 3 Components and Component Supports of Safety-Related Systems and Class CS Core Support Structures Under Specified Service Loading Combinations." 6. ASME Code Case N-100, "Pressure Relief Valve Design Rules, Section III, Division 1, Class 1, 2 and 3." 7. Regulatory Guide 1.124, "Design Limits and Loading Combinations for Class 1 Linear-Type Component Supports." 8. Regulatory Guide 1.130, "Design Limits and Loading Combinations for Class 1 Plate- and Shell-Type Component Supports." 9. NUREG-0484, "Methodology for Combining Dynamic Loads." 10. NUREG-0609, "Asymmetric Blowdown Loads on PWR Primary Systems." I 3-9.3-11 Rev. 1 - July 1981 APPENDIX A STANDARD REVIEW PLAN SECTION 3.9.3 STRESS LIMITS FOR ASME CLASS 1, 2, AND 3 COMPONENTS AND COMPONENT SUPPORTS OF SAFETY-RELATED SYSTEMS AND CLASS CS CORE SUPPORT STRUCTURES UNDER SPECIFIED SERVICE LOADING COMBINATIONS A. INTRODUCTION Nuclear power plant components and supports are subjected to combinations of loadings derived from plant and system operating conditions, natural phenomena, postulated plant events, and site-related hazards. Section III, Division 1 of the ASME Code (hereafter referred to as the Code) provides specific sets of design and service stress limits that apply to the pressure retaining or structural integrity of components and supports when subjected to these loadings. The design and service stress limits specified by the Code do not assure, in themselves, the operability of components, including their supports, to perform the mechanical motion required to fulfill the component's safety function. Certain of the service stress limits specified by the Code (i.e., level C and D) may not assure the functional capability of components, including their supports, to deliver rated flow and retain dimensional stability. Since the combination