Document: NUREG-0800
Document ID: f48fc6fe-7c52-4612-b75c-034cedcfeb13
Document Type: srp
Title: STEEL CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070325.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.2
CFR Part: 
CFR Title: 

Content:
containment to verify its leak integrity. The loading combination in this case includes: D + L + T + P t t (ii) 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 generated by the design basis accident. The loading combination in this case includes: D + L + P + T + R a a a (iii) Service conditions The load combinations in these cases correspond to and include Level A service limits, Level B service limits, Level C service limits, Level D service limits, and the post-flooding condition. The loads may be combined by their actual time history of occurrence taking into consideration their dynamic effect upon the structure. DRAFT Rev. 2 - April 1996 3.8.2-12 (a) Level A Service Limits These service limits are applicable to the service loadings to which the containment is subjected, including the plant or system design basis accident conditions for which the containment function is required, excepting only those categorized as Level B, Level C, Level D, or Testing Loadings. The loading combinations corresponding to these limits include the following: (1) Normal operating plant condition D + L + T + R + P o o o (2) Operating plant condition in conjunction with multiple safety relief valves actuation D + L + T + R + P s s s (3) Loss-of-coolant accident (LOCA)47 D + L + T + R + P a a a (4) Multiple SRV actuations in combination with small-break accident or intermediate-break accident D + L + T + R + P + T + R + P a a a s s s (5) Normal operating plant conditions in combination with inadvertent full actuation of a postaccident inerting hydrogen control system D + L + T + R + P + P o o o g3 48 (6) Pressure test load to ensure that the containment will safely withstand the pressure calculated to result from carbon-dioxide inerting D + 1.10 x Pg3 49 (b) Level B Service Limits