Document: NRC Regulatory Guide
Document ID: 10f3c2aa-ada2-4132-8d49-7867458d81a7
Document Type: regulatory_guide
Title: Design Limits and Loading Combinations for Metal Primary Reactor Containment System Components + HISTORY - HISTORY 10/2006 – DG-1158 , Proposed Revision 1
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0630/ML063000278.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.57
CFR Part: 
CFR Title: 

Content:
oss of coolant accident (LOCA), the design-basis LOCA is postulated. DG-1158, Page 6 Ps-------All pressure loads that are caused by the actuation of safety relief valve (SRV) discharge, including pool swell and subsequent hydrodynamic loads. Ts-------All thermal loads that are generated by the actuation of SRV discharge, including pool swell and subsequent hydrodynamic thermal loads. Rs ------All pipe reaction loads that are generated by the actuation of SRV discharge, including pool swell and subsequent hydrodynamic reaction loads. Yr ------Equivalent static load on the structure generated by the reaction on the broken pipe during the design-basis accident. Yj-------Jet impingement equivalent static load on the structure generated by the broken pipe during the design-basis accident. Ym -----Missile impact equivalent static load on the structure generated by or during the design-basis accident, such as pipe whipping. FL ------Load generated by the post-LOCA flooding of the containment, if any. Pg1------Pressure load generated from fuel clad metal-water reaction. Pg2------Pressure loads generated by hydrogen burning. Pg3------Pressure load from post-accident inerting, assuming carbon dioxide is the inerting agent. 1.2 Loading Combinations and Design Limits The specified loads and load combinations are acceptable if found to be in accordance with the following guidance. The following load combinations include all loading combinations for which the containment might be designed for or subjected to during the expected life of the plant. 1.2.1 Testing Condition This includes the testing condition of the containment to verify its leak integrity. In this case, the loading combination includes: D + L + Tt + Pt 1.2.2 Design Conditions These include all design loadings for which the containment vessel or portions thereof might be designed for during the expected life of the plant. Such loads include design pressure, design temperature, and the design mechanical loads