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:
es other than the containment will perform acceptably, commensurate with their intended safety function, when designed in accordance with the above standards. Meeting these requirements provides added assurance that the structures, systems, and components described herein will perform their intended safety function.68 3. Compliance with GDC 2 requires that systems, structures, and components important to safety be designed to withstand the effects of expected natural phenomena combined with the effects of normal and accident conditions without loss of capability to perform their safety function. The primary function of structures other than the containment is to house safety-related equipment, protecting it from the effects of natural phenomena so that it can perform its function as needed. Consequently, it is necessary to specify the most severe natural phenomena event that may occur as a function of the frequency of occurrence. Structures that house safety-related equipment must be designed to withstand the loads specified within an adequate margin. Load combinations and specifications cited in this SRP section provide engineering criteria that are acceptable to the staff for accomplishing that function. DRAFT Rev. 2 - April 1996 3.8.4-18 Meeting this requirement provides added assurance that equipment and structures will be designed to withstand effects of natural phenomena and will perform their intended safety function.69 4. Compliance with GDC 4 requires that structures important to safety shall be designed to accommodate the effects of and to be compatible with environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, including LOCAs. These structures shall be appropriately protected against dynamic effects, 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