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:
including the effects of missiles, pipe whipping, and discharge fluids, that may result from equipment failures and from events outside the nuclear power unit. The requirements of GDC 4 will ensure a suitable and controlled operating environment for structures, systems, and components important to safety during normal operation, during adverse environmental occurrences, and during and subsequent to postulated accidents, including LOCAs. SRP Section 3.8.4 cites Appendix C to ACI 349 and Regulatory Guides 1.91 and 1.115 to provide appropriate design criteria against dynamic loads. Meeting these requirements provides added assurance that structures will not fail to function as designed, thus providing protection against loss of their structural integrity.70 5. Compliance with GDC 5 prohibits the sharing of structures important to safety by nuclear power units unless it can be shown that such sharing will not significantly impair their ability to perform their safety function, including, in the event of an accident in one unit, an orderly shutdown and cooldown of the remaining units. The requirements of GDC 5 are imposed to ensure that the use of common structures in multiple-unit plants will not significantly affect the orderly and safe shutdown and cooldown in one plant in the event of an accident in another. Loads from normal operation and design basis accidents are combined in the load combination equations so that the resulting structural designs provide for mutual independence of shared structures. Meeting this requirement provides added assurance that structures other than the containment and its associated components are capable of performing their required safety function even if they are shared by multiple nuclear power units. 71 6. Compliance with Appendix B to 10 CFR Part 50 requires that applicants establish and maintain a quality assurance program (including design, testing, and records control) as outlined therein. SRP Section 3.8.4 provides guidance