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:
Mar. 07, 2017
Filed:
Nov. 15, 2011
Hiroshi Fujimoto, Tokyo, JP;
Hironobu Shinohara, Tokyo, JP;
Yasutake Akizuki, Tokyo, JP;
Toshiki Fukui, Tokyo, JP;
Yuichi Tanaka, Tokyo, JP;
Shinji Kiuchi, Tokyo, JP;
Hiroshi Shirasawa, Tokyo, JP;
Toshiaki Matsumura, Tokyo, JP;
Hiroshi Fujimoto, Tokyo, JP;
Hironobu Shinohara, Tokyo, JP;
Yasutake Akizuki, Tokyo, JP;
Toshiki Fukui, Tokyo, JP;
Yuichi Tanaka, Tokyo, JP;
Shinji Kiuchi, Tokyo, JP;
Hiroshi Shirasawa, Tokyo, JP;
Toshiaki Matsumura, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A reactor shutdown system includes a reactor, a control-rod drive unit that can drive a control rod in pulling and inserting directions with respect to a fuel assembly, a power source that can supply power to the control-rod drive unit, and a power converter that is provided between the control-rod drive unit and the power source, in which when power supply is cut off, the control-rod drive unit inserts the control rod into the fuel assembly to stop nuclear reaction in the reactor, and the reactor shutdown system includes a reactor trip breaker provided between the power converter and the control-rod drive unit, a safety protection-system device that controls the reactor trip breaker to cut off power supply to the control-rod drive unit, and a CCF device that controls the power converter to cut off power supply to the control-rod drive unit.