Use of isolation condenser and/or feedwater to limit core flow, core power, and pressure in a boiling water reactor
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United States of America Patent
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Oct 5, 2021
Grant Date -
Oct 15, 2020
app pub date -
Apr 11, 2019
filing date -
Apr 11, 2019
priority date (Note) -
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Abstract
A method and apparatus of limiting power of a boiling water nuclear reactor system includes a reactor pressure vessel, a reactor core disposed in the reactor pressure vessel, a core shroud surrounding the reactor core, a downcomer region disposed between an inner surface of the reactor pressure vessel and the core shroud, a steam line connected to an upper end of the reactor pressure vessel and a condenser system that receives steam from the reactor pressure vessel. A portion of the condenser system condensate is returned to the reactor pressure vessel of the boiling water reactor inside the core barrel above the core rather than into the downcomer. Returning the condensate in this way increases the effectiveness of an isolation condenser system or if the condensate is a portion of the feedwater from the main condenser it provides an effective means to regulate core flow and core power.
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