Document: NUREG-0800
Document ID: 92d817ac-3ce3-4cf7-8d1a-627e8242fbf2
Document Type: srp
Title: PLANT DESIGN FOR PROTECTION AGAINST POSTULATED PIPING FAILURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070312.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.6.1
CFR Part: 
CFR Title: 

Content:
esign stresses and/or strains; and (c) The load factors and the load combinations. DRAFT Rev. 3 - April 1996 3.6.1-22 7. The structural design loads, including the pressure and temperature transients, the dead, live and equipment loads and the pipe and equipment static, thermal, and dynamic reactions should be provided. 8. Seismic Category I structural elements such as floors, interior walls, exterior walls, building penetrations and the buildings as a whole should be analyzed for eventual reversal of loads due to the postulated accident. 9. If new openings are to be provided in existing structures, the capabilities of the modified structures to carry the design loads should be demonstrated. 10. Verification that failure of any structure, including nonseismic Category I structures, caused by the accident, will not cause failure of any other structure in a manner to adversely affect: (a) Mitigation of the consequences of the accidents; and (b) Capability to bring the unit(s) to a cold shutdown condition. 11. Verification that rupture of a pipe carrying high energy fluid will not directly or indirectly result in: (a) Loss of required redundancy in any portion of the protection system (as defined in IEEE-279IEEE 603-1980 ), Class IE electric system (as defined in 44 IEEE-308 ), engineered safety feature equipment, cable penetrations, or their 45 interconnecting cables required to mitigate the consequences of that accident and place the reactor(s) in a cold shutdown condition; or (b) Environmentally induced failures caused by a leak or rupture of the pipe which would not of itself result in protective action but does disable protection functions. In this regard, a loss of redundancy is permitted; but a loss of function is not permitted. For such situations, plant shutdown is required. 12. Assurance should be provided that the control room will be habitable and its equipment functional after a steam line or feedwater line break or that the capability for shutdown and