Pressurized water reactor with upper vessel section providing both pressure and flow control
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United States of America Patent
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Jan 12, 2021
Grant Date -
Nov 8, 2018
app pub date -
Jul 6, 2018
filing date -
Oct 26, 2011
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Abstract
A pressurized water reactor (PWR) includes a vertical cylindrical pressure vessel having a lower portion containing a nuclear reactor core and a vessel head defining an integral pressurizer. A reactor coolant pump (RCP) mounted on the vessel head includes an impeller inside the pressure vessel, a pump motor outside the pressure vessel, and a vertical drive shaft connecting the motor and impeller. The drive shaft does not pass through the integral pressurizer. The drive shaft passes through a vessel penetration of the pressure vessel that is at least large enough for the impeller to pass through.
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