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:
Jul. 08, 2003
Filed:
Aug. 30, 2001
Kazuhiko Ishii, Tokyo, JP;
Shigeru Udono, Tokyo, JP;
Koji Masui, Tokyo, JP;
Masahiro Matsuda, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a boiling water reactor controlling each control rod hydraulically by driving a solenoid valve, the control system comprises an operation control means having a duplicated data processing unit for generating sequence patterns based on the timing of the driving sequence based on the control information provided manually, a transmission control means for creating a command word corresponding to each control rod being controlled based on said sequence pattern, and mutually communicating each command word between duplicated data processing units and computing the AND logic of said data within a predetermined time difference, and when the computed result coincide, transmitting the selected command word serially; a transmission unit for receiving said command word and performing protocol conversion thereto, and transmitting the same to a plurality of transmission branch units positioned downstream as the control command; and a solenoid valve drive circuit for driving the control rod drive unit corresponding to each rod branched from said transmission branch units.