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:
May. 06, 1986
Filed:
Nov. 04, 1983
Applicant:
Inventors:
Takaaki Mochida, Hitachi, JP;
Junichi Yamashita, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G21C / ;
U.S. Cl.
CPC ...
376428 ; 376419 ; 376435 ; 376447 ;
Abstract
A fuel assembly for loading in the core of a boiling water reactor comprises a large number of vertically extending fuel rods, some of which contains a burnable poison, where a rod-average uranium enrichment of fuel is higher in the upper region of the fuel assembly than in the lower region and a total content of the burnable poison is lower in the lower region of the fuel assembly than in the upper region and a spectral shift effect of the boiling water reactor is increased while thoroughly maintaining a reactor shutdown margin, and a discharge exposure is increased.