Closed Cooling Water System for Reactor Service

4 Closed Cooling Water System for Reactor Service 

The closed cooling water system consists of a separate, forced circulation loop. This system uses water piped from the site service water source to provide a heat sink for selected nuclear system equipment. Its purpose is to provide a second barrier between the primary systems containing radioactive products and the service water system that is the final heat 

Reactor recirculation pump seal coolers Reactor recirculation pump motor coolers Nonregenerative cleanup heat exchanger Clean sump coolers Sample coolers Drywell coolers 

Cleanup recirculation pump coolers Off-gas system glycol coolers Control rod drive supply pumps Radwaste concentrator condensers Radwaste concentrated waste tank Control rod drive supply pumps 

Any possible radioactive leakage from the foregoing reactor equipment would be to, and would be confined in, the closed loop cooling water system, which is monitored continuously for radioactivity. A surge tank is used to accommodate system volume swell and shrinkage and to provide a means for adding makeup water and inhibitors. 

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Closed cooling water system for reactor service... 

The component cooling water system is a closed loop cooling system that transfers heat from various plant components to the service water system during normal phases of operation. It removes heat from various components needed for plant operation and removes core decay heat and sensible heat for normal reactor shutdown and cooldown. 

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