Document: NUREG-0800
Document ID: ab4f353d-c299-479d-ab25-834f97196988
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR CONCRETE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070326.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
load, jet impingement, and/or pressure loads should be considered. WheneverBy implication, a reference is made to ACI 349, it implies that the code is * augmented by is based on the guidance provided in Regulatory Guide 1.142, as supplemented and modified by Appendix E to SRP Section 3.8.4.18 3.8.3-7 DRAFT Rev. 2 - April 1996 ii. Those loads to be sustained during severe environmental conditions, including those induced by the operating basis earthquake (OBE) specified for the plant site. iii. Those loads to be sustained during extreme environmental conditions, including those induced by the safe shutdown earthquake (SSE) specified for the plant site. iv. Those loads to be sustained during abnormal plant conditions. The most critical abnormal plant condition during which most of the containment internal structures have to perform their primary function is the design basis LOCA. Ruptures of other high-energy pipes should also be considered. Time-dependent and dynamic loads induced by such accidents include elevated temperatures and differential pressures across compartments, jet impingement, impact forces associated with the postulated ruptures of piping, and loads applicable to some structures such as drag forces in the PWR ice-condenser containment. In addition, for structures or structural components located in or above the suppression pools of BWR Mark III containments, the applicable LOCA-related or 15 LOCA/SRV-related hydrodynamic loads manifested as jet loads and/or pressure loads should be considered. The various combinations of the above loads that are normally postulated and reviewed include the following: normal operating loads, normal operating loads with severe environmental loads, normal operating loads with extreme environmental loads, normal operating loads with abnormal loads, normal operating loads with severe environmental and abnormal loads, and normal operating with extreme environmental and abnormal loads. b. In addition, the following