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:
Apr. 12, 1994
Filed:
Jan. 04, 1993
Yoshitaka Yaginuma, Tohkai, JP;
Mitsubishi Nuclear Fuel Co., Tokyo, JP;
Abstract
A process is presented for fabricating a fuel rod including an elongated fuel tube, a lower end plug for sealing one of the openings, and an upper end plug for sealing an opposite opening. The steps include sealing an opening of the aperture by melting the lead portion of the upper end plug in such way that welding is carried out along the lead portion and a welded portion formed by the welding is disposed below the lower portion of the chamfer. The elongated fuel tube has openings at opposite end thereof, and a plurality of fuel pellets inserted therein. The upper end plug has an end face and an outer peripheral surface, a chamfer formed at an intersection between the end face and the outer peripheral surface, an aperture formed in the center of the upper end plug, a groove formed around the aperture, and a lead portion formed between the aperture and the groove.