Document: NUREG-0800
Document ID: be0ff036-ddfa-4ffb-8bb7-15e0fd9a1142
Document Type: srp
Title: 7.2 7.3 7.4 7.5 7.6 7.7
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350467.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
t: (1) appropriate con- sideration of the most severe 'of the natural phenomena that have been historically reported for the site.and surrounding area, with sufficient margin for the limited accuracy, quantity, and period of time in which the historical data have been accumulated, (2) appropriate combinations of the effects of normal and accident conditions with the effects of the natural phenomena, and (3) the importance of the safety functions to be performed." Applicability: All instrumentation and control systems and components important-to safety. Review Methods:, The design bases for protection against natural phenomena for instrumentation and control systems important to safety should be provided for each system in the subsequent sections of Chapter 7 of the SAR. The design bases should identify those systems and components which are qualified to survive the effects of earthquakes and other natural phenomena. The review should confirm that the instru- ment and control systems important to safety are..qualflied for protection against natural phenomena consistent with the analysis of these events as provided in Chapter 3 of the SAR, and that they are located and housed in structures consistent .with these requirements. The.evaluation of the adequacy of qualification programs to demonstrate the capability of instrumentation and control, systems to withstand the effects of natural phenomena is addressed in the review of.Section 3.10 of the SARL c. Criterion 4 - Environmental and Missile Design Bases. "Structures, systems, and components important to safety shall be designed to accommodate the effects of and to be compatible 7.1-14 Rev. 0 - July 1981 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 dynami.c effects, including.the effects of missiles, pipe whipping, and discharging