Document: NUREG-0800
Document ID: 808cea66-69b8-4f91-9fb2-62b3b99bc87a
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340579.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3
CFR Part: 
CFR Title: 

Content:
plicable Codes, Standards, and Specifications The information pertaining to design codes, standards, specifications, and regulatory guides, and other industry standards that are applied in the design, fabrication, construction, testing, and surveillance of the containment structures, is reviewed. The specific edition, date, or addenda identified for each document are also reviewed. 3. Loads and Loading Combinations a. Information pertaining to the applicable design loads and various load combinations thereof is reviewed. The loads normally applic- able to contaiment internal structures include the following: i. Those loads encountered during normal plant startup, operation, and shutdown, including dead loads, live loads, thermal loads due to operating temperature, and hydrostatic loads such as in refueling and pressure suppression pools in addition to hydro- dynamic loads resulting from actuation of safety relief valves (SRV) and manifested as drag load, jet impingement and/or pressure loads should be considered. ii. Those loads to be sustained during severe environmental conditions, includind 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