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:
SS C SSCs may be 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. 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). Note: RTNSS B SSCs may provide core cooling and heat transfer functions in the post-72 hour period. RTNSS C SSCs may provide for defense-in-depth cooling and heat transfer functions in order to meet NRC safety goal guidelines. 3. The capability of the VWS to provide adequate cooling water to safety-related ECCS components, heating-ventilation-air conditioning (HVAC), and reactor auxiliary equipment for all planned operating conditions. RTNSS B: applies for nonsafety-related functions in the post-72 hour period. RTNSS C: applies for nonsafety-related defense-in-depth functions in order to meet NRC safety goal guidelines. Nonsafety-related nonrisk-significant: apply for normal and abnormal conditions. 4. The functional performance requirements of the system, including the ability to withstand adverse operational (e.g., water hammer) and environmental occurrences, operability requirements for normal operation and requirements for operations during and following other postulated events. RTNSS B: applies for nonsafety-related functions in the post-72 hour period. RTNSS C: may apply for nonsafety-related defense-in-depth functions in order to meet NRC safety goal guidelines. 5. Multiple performance functions (if required by system design to perform a safety function) assigned to the system and the necessity of each function for system support of emergency core cooling and safe shutdown. RTNSS B: applies for nonsafety-related functions in the post-72 hour period. RTNSS C: applies for nonsafety-related defense-in-depth functions in order to meet NRC safety goal guidelines. For RTNSS