Document: NUREG-0800
Document ID: 71b0a52a-ac0c-4c26-b0eb-708a6f5600fb
Document Type: srp
Title: FOUNDATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070333.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.5
CFR Part: 
CFR Title: 

Content:
SRP section provide engineering criteria that are acceptable to the staff for this purpose. Meeting this requirement provides assurance that foundations of structures will be designed to withstand the effects of natural phenomena and will perform their intended safety function.50 4. Compliance with GDC 4 requires that structures important to safety be designed to accommodate the effects of, and be compatible with, environmental conditions associated with normal operations, maintenance, testing, and postulated accidents, including loss-of- coolant accidents. These structures shall be appropriately protected against dynamic effects (including the effects of missiles, pipe whipping, and discharge fluids) that could cause equipment failure as well as from events that occur outside the nuclear power unit. This criterion requires that a suitable and controlled operating environment be provided for structures, systems, and components during normal operations, during adverse environmental occurrences, and during and subsequent to postulated accidents, including loss-of-coolant accidents. ACI 349, including Appendix C, "Special Provisions for Impulsive and Impactive Loads," and Regulatory Guides 1.91 and 1.115 provide appropriate design criteria against dynamic loads. This guidance is referenced in SRP Section 3.8.4. Meeting these requirements provides assurance that foundations of structures will not fail to function as designed, thus providing protection against loss of their structural integrity.51 5. Compliance with GDC 5 prohibits the sharing of structures important to safety by multiple nuclear power units, unless it can be shown that such sharing will not 3.8.5-11 DRAFT Rev. 2 - April 1996 significantly impair the 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