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:
Dec. 21, 1999
Filed:
Jun. 17, 1996
Akihiro Yamanaka, Hitachi, JP;
Katsumasa Haikawa, Jyuou-machi, JP;
Akiko Kanda, Hitachi, JP;
Takaaki Mochida, Hitachi, JP;
Junichi Yamashita, Hitachi, JP;
Motoo Aoyama, Mito, JP;
Yoko Yuchi, Hitachi, JP;
Junichi Koyama, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In an arrangement of an initial core, the core is loaded with 572 high enrichment fuel assemblies H with 4.2 wt % average enrichment and 300 low enrichment fuel assemblies L with 1.5 wt % average enrichment. The average enrichment of the core is about 3.3 wt %. In this core, only the low enrichment fuel assemblies are loaded into the most outer position of the core and the high enrichment fuel assemblies are loaded into an area other than the most outer position. In this arrangement, the average enrichment of reload fuel assemblies is 3.7 wt %.