Document: NUREG-0800
Document ID: 339b5072-d5b1-47d7-9002-e7b942ab753b
Document Type: srp
Title: II.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070311.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.1.3.8
CFR Part: 
CFR Title: 

Content:
stems, and components must include considering the effects of accident conditions, plus the importance of the safety function to be performed and the effects of natural phenomena. The staff's criteria for the design of missile barriers provide for protecting structures, systems, and components from missiles generated by natural phenomena and other events. The criteria are based on sound engineering principles, experience, and testing and provide for protecting structures, systems, and components against natural phenomena that occur concurrently with accident conditions. Meeting the requirements of GDC 2 provides a level of assurance that equipment important to safety will be protected against missile and accident effects caused by natural phenomena and will thus be capable of performing its intended safety function.26 2. Compliance with GDC 4, "Environmental and Dynamic Effects Design Bases," requires that components important to safety be designed to accommodate the effects of, and be compatible with, environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, including loss-of-coolant accidents. Ensuring the adequacy of such components includes protecting against the effects of missiles, pipe whipping, and discharging fluids that may result from equipment failures and from events and conditions outside the nuclear power unit. SRP Section 3.5.3 includes descriptions of the staff's criteria for providing adequate barriers to resist missiles, pipe whipping, and the effects of discharging fluids in order to protect structures, systems, and components important to safety. These criteria are based on sound engineering principles, experience, and test results. Meeting the requirements of GDC 4 to protect equipment against the effects of missiles, pipe whipping, and discharging fluids provides a level of assurance that equipment important to safety will be capable of performing its intended safety function.27 3.5.3-5 DRAFT