Document: NUREG-0800
Document ID: b172ba61-9651-45f8-ac8e-6d6e00e27060
Document Type: srp
Title: STEEL CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1006/ML100630179.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.2
CFR Part: 
CFR Title: 

Content:
D + L + Tt + Pt ii. Design Conditions These include all design loadings for which the containment vessel or portions thereof might be designed during the expected life of the plant. Such loads include design pressure, design temperature, and the design mechanical loads generated by the design-basis LOCA. The loading combination in this case includesC D + L + Pa + Ta + Ra 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 postflooding condition. The loads may be combined by their actual time history of occurrence taking into consideration their dynamic effect upon the structure. (1) 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, except only those categorized as Level B, Level C, Level D, or testing loadings. The loading combinations corresponding to these limits include the following: (a) Normal operating plant condition D + L + To + Ro + Po 3.8.2-13 Revision 3 - May 2010 (b) Operating plant condition in conjunction with the actuation of multiple SRVs D + L + Ts + Rs + Ps (c) Design-basis LOCA D + L + Ta + Ra + Pa (d) Multiple SRV actuations in combination with small- or intermediate-break accident D + L + Ta + Ra + Pa + Ts + Rs + Ps (e) Normal operating plant conditions in combination with inadvertent full actuation of a postaccident inerting hydrogen control system (10 CFR 50.34(f)(3)(v)(B)(1)) D + L + To + Ro + Po + Pg3 (f) Pressure test load to ensure that the containment will safely withstand the pressure calculated to result from carbon-dioxide inerting (10 CFR 50.34(f)(3)(v)(B)(2)) D + 1.10 x Pg3 (2) Level B Service Limits These service limits include the loads subject to Level A service limits plus the additional loads resulting from