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:
Jan. 04, 2011
Filed:
Feb. 18, 2005
Tsugio Yokoyama, Yokohama, JP;
Mitsuaki Yamaoka, Yokohama, JP;
Yasuyuki Moriki, Kawasaki, JP;
Ryoma Kato, Yokohama, JP;
Yasushi Tsuboi, Yokohama, JP;
Atsuko Matsuda, Yokohama, JP;
Tsugio Yokoyama, Yokohama, JP;
Mitsuaki Yamaoka, Yokohama, JP;
Yasuyuki Moriki, Kawasaki, JP;
Ryoma Kato, Yokohama, JP;
Yasushi Tsuboi, Yokohama, JP;
Atsuko Matsuda, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A fast reactor having a reflector control system is provided which decreases the change in reactivity of the reactor core with time without controlling a reflector lifting speed and a water flow rate. The fast reactor has a neutron reflector provided outside the reactor core and which is moved in a vertical direction for adjusting neutron leakage to control the reactivity of the reactor core. The neutron reflector is moved in an upward direction with the change in reactivity caused by fuel burn-up. At least a part of a lower region of the neutron reflector may be a region having a high neutron reflection ability as compared to that of the other region. The high reflection region is located at the bottom of the neutron reflector and extends from between one fourth and one half of the height of the neutron reflector.