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. 05, 1993
Filed:
Sep. 19, 1990
Akinobu Nakajima, Hitachi, JP;
Yasunori Bessho, Mito, JP;
Motoo Aoyama, Mito, JP;
Junichi Koyama, Hitachi, JP;
Hiromasa Hirakawa, Hitachi, JP;
Junichi Yamashita, Hitachi, JP;
Tatsuo Hayashi, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A nuclear fuel assembly for a nuclear reactor has a plurality of vertically extending fuel rods arranged side by side in a square array and containing fissile material. The array has two adjacent first sides which are next to a control rod region of the core and two adjacent second sides which are next to a non-control rod region of the core. When the rods of the array as seen in horizontal cross section, excluding the rods lying on the diagonal line joining the opposite corners of the array at which the control rod region meets the non-control rod region, is divided into four regions which are