Document: NUREG-0800
Document ID: 34819bc5-4c15-4da7-8de9-4ab5944771a7
Document Type: srp
Title: OTHER SEISMIC CATEGORY I STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1006/ML100630323.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.4
CFR Part: 
CFR Title: 

Content:
testing, and surveillance of Seismic Category I structures is reviewed. 3. Loads and Loading Combinations. The review encompasses information pertaining to the applicable design loads and various load combinations thereof. The loads normally applicable to Seismic Category I structures include the following: A. Those loads encountered during construction of the Seismic Category I structures which include dead loads, live loads, prestress loads, temperature, wind, earth pressure, snow, rain, and ice, and construction loads that may be applicable such as material loads, personnel and equipment loads, horizontal construction loads, erection and fitting forces, equipment reactions, and form pressure. B. Those loads encountered during normal plant startup, operation, and shutdown, including dead loads, live loads, thermal loads resulting from operating temperature, and hydrostatic loads such as those in spent fuel pools. C. Those loads to be sustained during severe environmental conditions, including those induced by the operating-basis earthquake (OBE) and the design wind specified for the plant. Subsection II.3.A defines the condition for which the OBE load is required for design of Seismic Category I structures. D. Those loads to be sustained during extreme environmental conditions, including those induced by the SSE and the design tornado specified for the plant. E. Those loads to be sustained during abnormal plant conditions. Such abnormal plant conditions include the postulated rupture of high-energy piping. Loads induced by such an accident may include elevated temperatures and pressures within or across compartments and possibly jet impingement and impact forces associated with such ruptures. F. Those loads induced by hydrodynamic loads (e.g., Safety Relief Valves (SRV) and LOCAs) which would generate building vibration inertial loads (floor response spectra) and elevated temperatures. The various combinations of the above loads that are normally postulated and