Centrifugal cooling pump for a nuclear reactor having a thermal barrier and a vaned wheel flywheel
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United States of America Patent
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Mar 12, 2019
Grant Date -
Sep 22, 2016
app pub date -
Oct 17, 2014
filing date -
Oct 17, 2013
priority date (Note) -
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Abstract
A motor-driven centrifugal pump for circulating a coolant in a primary circuit of a nuclear reactor comprises a sealed motor unit, a hydraulic part and a shaft which is immersed in the coolant, turned by the sealed motor unit and pumping the coolant by means of an impeller of the hydraulic part secured to the shaft; the motor unit comprising a dry stator and an immersed rotor mounted securely on the shaft. The motor-driven pump also comprises an immersed flywheel mounted securely on the shaft between the rotor of the motor unit and the impeller of the hydraulic part, allowing a minimum slowing-down time after the electrical power supply is cut; the flywheel comprising a vaned wheel generating a circulation of the coolant to cool the motor unit.
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