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PWR DECAY HEAT REMOVAL SYSTEM IN WHICH STEAM FROM THE PRESSURIZER DRIVES A TURBINE WHICH DRIVES A PUMP TO INJECT WATER INTO THE REACTOR PRESSURE VESSEL

United States Patent Application

20180053571
A1
View the Complete Application at the US Patent & Trademark Office
In conjunction with a pressurized water reactor (PWR) and a pressurizer configured to control pressure in the reactor pressure vessel, a decay heat removal system comprises a pressurized passive condenser, a turbine-driven pump connected to suction water from at least one water source into the reactor pressure vessel; and steam piping configured to deliver steam from the pressurizer to the turbine to operate the pump and to discharge the delivered steam into the pressurized passive condenser. The pump and turbine may be mounted on a common shaft via which the turbine drives the pump. The at least one water source may include a refueling water storage tank (RWST) and/or the pressurized passive condenser. A pressurizer power operated relief valve may control discharge of a portion of the delivered steam bypassing the turbine into the pressurized passive condenser to control pressure in the pressurizer.
Graham, Thomas G. (Lynchburg, VA)
15/ 689,724
August 29, 2017
[0002] This invention was made with Government support under Contract No. DE-NE0000583 awarded by the Department of Energy. The Government has certain rights in this invention.