RCIC – Reactor Core Isolation Cooling

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The Reactor Core Isolation Cooling  (RCIC) system is made up of a turbine-driven pump and piping with valves. When the main steam lines are isolated and the normal water supply to the reactor is lost, the RICI system delivers water to the reactor.

Steam from the main steam lines drives a turbine and the exhaust is vented to a suppression pool. The turbine also drives a pump that provides (makeup) water from a condensate storage tank via a feedwater piping. The flow rate normally achieves approximately the same rate as the steaming rate 15 minutes after shutdown. This function can be automatically achieved at low water level in the reactor vessel or manually by an operator.