PRESSURIZED WATER REACTOR WITH INTERNAL REACTOR COOLANT PUMP SYSTEM
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United States of America Patent
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app pub date -
Apr 16, 2013
filing date -
Apr 16, 2012
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Abandoned
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Abstract
A pressurized water reactor (PWR) includes a pressure vessel containing a radioactive core immersed in primary coolant water. A reactor coolant pump (RCP) disposed in a downcomer annulus of the PWR includes a jet pump and an electric pump whose impeller is disposed at the jet pump injector inlet. The electric pump includes a canned electric motor that is disposed in the downcomer annulus. In another RCP embodiment, the jet pump is omitted and the electric pump is seated in a flow distributor with the impeller of the seated RCP disposed in an impeller plenum defined by the flow distributor. The flow distributor further defines a fluid flow path with one or more branches extending from an inlet and running alongside but not through the canned electric motor of the seated RCP to discharge into the impeller plenum containing the impeller of the seated RCP.
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