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. 25, 2008
Filed:
Mar. 16, 2006
Renzou Takeda, Kawasaki, JP;
Motoo Aoyama, Mito, JP;
Junichi Miwa, Mito, JP;
Tomohiko Ikegawa, Hitachi, JP;
Kumiaki Moriya, Hitachi, JP;
Renzou Takeda, Kawasaki, JP;
Motoo Aoyama, Mito, JP;
Junichi Miwa, Mito, JP;
Tomohiko Ikegawa, Hitachi, JP;
Kumiaki Moriya, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A ratio of the number of fuel assemblies loaded on a core to the number of control rod drive mechanisms is 3 or more. The fuel assembly itself contains mixed oxides of a low enrichment concentration uranium oxide containing 3 to 8 wt % in the average enrichment concentration of the fuel assembly, or mixed oxide containing not less than 2 wt %, but less than 6 wt % in the average enrichment concentration of fissile plutonium of. In the burner type BWR core on which the fuel assemblies are loaded, an average weight density of uranium, plutonium and minor actinides is 2.1 to 3.4 kg/L as a conversion at the value of unburned state.