The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2010
Filed:
Jan. 25, 2007
Atsushi Fushimi, Hitachi, JP;
Setsuo Arita, Hitachiota, JP;
Kazuhiko Ishiii, Takahagi, JP;
Yoshihiko Ishii, Hitachinaka, JP;
Shin Hasegawa, Mito, JP;
Atsutoshi Mizuide, Hitachi, JP;
Atsushi Fushimi, Hitachi, JP;
Setsuo Arita, Hitachiota, JP;
Kazuhiko Ishiii, Takahagi, JP;
Yoshihiko Ishii, Hitachinaka, JP;
Shin Hasegawa, Mito, JP;
Atsutoshi Mizuide, Hitachi, JP;
Hitachi-GE Nuclear Energy, Ltd., Ibaraki-ken, JP;
Abstract
In order to provide a reactor power control apparatus which can maintain a stable water level when reactivity control based on control rod operation and water level adjustment is performed, this invention comprises a turbine control which calculates the load set error signal from the error between the set target generator power value and the generator power that was fed back and outputs to the turbine control apparatus; control rod control in the natural circulation boiling water reactor which calculates the control rod operation signal and outputs it to the control rod drive control apparatus; water level control inside the natural circulation boiling water reactor which calculates the water level set signal and outputs it to the feed water control apparatus; and the switch determining device which selectively outputs one of the control rod control and water level control based on the generator power that was fed back, the reactor power and water level, as well as switching rules and determination values.