Document: NUREG-0800
Document ID: 5cdeed4a-6cd5-4840-90c0-5159fbf2c9f0
Document Type: srp
Title: CHILLED WATER
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1409/ML14093A350.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.2.7
CFR Part: 
CFR Title: 

Content:
y functions. Note: RTNSS B SSCs are designed to withstand the effects of natural phenomena without loss of function. RTNSS C SSCs are evaluated, utilizing the “graded approach philosophy,” against the effects of the most probable hazards (e.g. floods, winds, missiles, seismic events). As a result of this evaluation, RTNSS C maybe designed against the effects of natural phenomena. SRP Section 19.3 provides further guidance related to the reliability and availability missions of RTNSS B and C SSCs. 3. GDC 4 requires that SSCs 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 LOCAs and dynamic effects of pipe whip, missiles, and discharging fluids. GDC 4 applies to this SRP section because the reviewer evaluates the VWS and its equipment to verify their capability to continue functioning to ensure safe-shutdown during normal operations, AOOs, and accident conditions (e.g. containment isolation). In addition, the VWS must be able to prevent or mitigate the consequences of an accident caused by exposure to environmental conditions of normal operations, maintenance, testing, or postulated accidents, including LOCAs and the dynamic effects of pipe whipping, missiles, and discharging fluids. GDC 4 requirements provide assurance that the VWS and its components will continue to perform required safety functions while exposed to environmental conditions of normal operations, maintenance, testing, and postulated accidents, including LOCAs and the dynamic effects of pipe whipping, missiles, and discharging fluids. Note: RTNSS B SSCs are analyzed and designed to withstand adverse effects associated with internal hazards, i.e., those created from conditions inside the plant (e.g., turbine missiles, pipe whip, and flooding). 4. GDC 5 requires that SSCs important to safety not be shared by nuclear power units unless