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Feedwater temperature control methods and systems

United States Patent

8,705,682
April 22, 2014
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A system for controlling the power level of a natural circulation boiling water nuclear reactor (NCBWR) is disclosed. The system, in accordance with an example embodiment of the present invention, may include a controller configured to control a power output level of the NCBWR by controlling a heating subsystem to adjust a temperature of feedwater flowing into an annulus of the NCBWR. The heating subsystem may include a steam diversion line configured to receive steam generated by a core of the NCBWR and a steam bypass valve configured to receive commands from the controller to control a flow of the steam in the steam diversion line, wherein the steam received by the steam diversion line has not passed through a turbine. Additional embodiments of the invention may include a feedwater bypass valve for controlling an amount of flow of the feedwater through a heater bypass line to the annulus.
Moen; Stephan Craig (Wilmington, NC), Noonan; Jack Patrick (Wilmington, NC), Saha; Pradip (Wilmington, NC)
GE-Hitachi Nuclear Energy Americas LLC (Wilmington, NC)
11/ 777,377
July 13, 2007
FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The present invention was made with government support under contract number DE-FC07-071D14778, which was awarded by the U.S. Department of Energy. The government has certain rights in the present invention.