Document: NUREG-0800
Document ID: 6813459c-4e76-4630-8395-e948ff46c2b3
Document Type: srp
Title: and 7.5 of the SAR.  The review of this requirement should be coordinated
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159A207.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.4
CFR Part: 
CFR Title: 

Content:
The design bases for protection against natural phenomena for I&C systems important to safety should be provided for the I&C system. The design bases should identify those systems and components that should be qualified to survive the effects of earthquakes and other natural phenomena. The review should confirm that the I&C systems important to safety are qualified for protection against natural phenomena consistent with the analysis of these events in Chapter 3 of the SAR, and that they are located and housed in structures consistent to these requirements. The evaluation of the adequacy of qualification programs to demonstrate the capability of I&C systems to withstand the effects of natural phenomena is addressed in the review of Section 3.10 of the SAR. The instrumentation systems needed for severe accidents must be designed so there is reasonable assurance they will operate in the severe accident environment for which they are intended, and over the time span for which they are needed. They need not be subject to additional environmental or seismic qualification testing or analysis. The review of conformance to GDC 2 should be coordinated with the organization responsible for review of plant systems and the organization responsible for review of mechanical engineering topics. (c) GDC 4, “Environmental and Dynamic Effects Design Bases” “Structures, systems, and components important to safety shall be designed to accommodate the effects of and to be compatible with the environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, including loss-of-coolant accidents. These structures, systems, and components shall be appropriately protected against dynamic effects, including 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...” Applicability - All I&C safety systems and supporting data communication