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, 2014
Filed:
Dec. 23, 2009
Eiji Ashida, Hitachiota, JP;
Xudong Zhang, Hitachinaka, JP;
Shoh Tarasawa, Hitachinaka, JP;
Masaya Okada, Hitachi, JP;
Yusuke Anma, Matsue, JP;
Eiji Ashida, Hitachiota, JP;
Xudong Zhang, Hitachinaka, JP;
Shoh Tarasawa, Hitachinaka, JP;
Masaya Okada, Hitachi, JP;
Yusuke Anma, Matsue, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention provides a method of manufacturing a core shroud for a nuclear plant and a nuclear power plant structure in which a groove portion is easily assembled in the case of manufacturing the core shroud having a weld structure of a nuclear power plant by a laser welding, and it is possible to obtain a weld joint portion in which a plastic distortion region and a residual stress are as small as possible, going with a solidification shrinkage of the weld portion. At a time of welding butted portions of a plurality of members constructing a core shroud, a root face is provided in the butted portion, a length of the root face is set to 25% to 95% of a thickness of the thinner one of the butted portions of a plurality of members, a narrow groove is provided in the other than the root face, and the butted portions are welded by a laser welding using a weld wire.