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. 21, 2003
Filed:
Nov. 02, 2000
Junichi Yamashita, Hitachi, JP;
Kumiaki Moriya, Hitachi, JP;
Katsumasa Haikawa, Jao-machi, JP;
Yasuhiro Masuhara, Hitachinaka, JP;
Taichi Takii, Hitachi, JP;
Akihiro Yamanaka, Hitachi, JP;
Takao Kondo, Hitachi, JP;
Motoo Aoyama, Mito, JP;
Masao Chaki, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A boiling water type nuclear reactor core, in which a plurality of fuel assemblies, each enclosed in a channel box, are loaded and a plurality of control rods, each having control blades, are arranged between the channel boxes. Long blade control rods, each having control rod blades which extend in four directions, are arranged between channel boxes on diagonals of square bundle regions each formed by a plurality of fuel assemblies, and short blade control rods, each having a control rod blade length of about half of the width of one of the square bundle regions, are arranged between the channel boxes in the center of each of the square bundle regions.