Document: NUREG-0800
Document ID: 786da65a-4915-4af3-afb3-678b7df5bea7
Document Type: srp
Title: OTHER SEISMIC CATEGORY I STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070327.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.4
CFR Part: 
CFR Title: 

Content:
ormation provided is reviewed to ascertain the structural behavior of such structures, particularly with respect to seismic events and plant process conditions during which they are required to remain functional.4 g. Masonry Walls These are walls, partitions, or radiation shields which are components of the structures listed above. They are constructed of concrete masonry units (CMU) bonded with mortar in single or multiple wythes and may be reinforced horizontally as well as vertically. The arrangement and configuration of these walls isare reviewed. 5 2. Applicable Codes, Standards, and Specifications The information pertaining to design codes, standards, specifications, regulatory guides, and other industry standards that are applied in the design, fabrication, construction, testing, and surveillance of seismic Category I structures is reviewed. * Whenever reference is made to ACI 349, it implies that the code is augmented by Regulatory Guide 1.142, (Ref. 2) as supplemented by Appendix E to this SRP section. DRAFT Rev. 2 - April 1996 3.8.4-4 3. Loads and Loading Combinations Information pertaining to the applicable design loads and various load combinations thereof is reviewed. The loads normally applicable to seismic Category I structures include the following: a. 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 those in spent fuel pools. b. 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. c. Those loads to be sustained during extreme environmental conditions, including those induced by the safe shutdown earthquake (SSE) and the design tornado specified for the plant. d. Those loads to be sustained during abnormal plant conditions. Such abnormal plant conditions include the postulated rupture of high-