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:
Jul. 07, 1992
Filed:
Jan. 09, 1991
Shozo Nakamura, Hitachiota, JP;
Tadashi Mizuno, Kitaibaraki, JP;
Junjiro Nakajima, Hitachi, JP;
Yoshihiko Yanagi, Hitachi, JP;
Hajime Umehara, Katsuta, JP;
Tetsuo Yasuda, Hitachi, JP;
Akira Maru, Ibaraki, JP;
Junichi Yamashita, Hitachi, JP;
Yuichiro Yoshimoto, Hitachi, JP;
Tatsuo Hayashi, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A fuel assembly comprises a plurality of fuel rods, a lower tie plate for supporting lower ends of the fuel rods, and a channel box surrounding a bundle of the fuel rods and the circumference of the lower tie plate to thereby define a cooling water leak passage between the lower tie plate and the channel box. The fuel assembly includes a venturi provided in the lower tie plate for generating a force tending to attract the channel box toward the lower tie plate under the action of a leak stream of the cooling water passing through the cooling water leak passage. The fuel assembly also includes an arrangement provided in the lower tie plate for suppressing vibrations of the channel box caused upon an influence of the venturi.