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. 17, 2018
Filed:
Dec. 24, 2013
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Tsuyoshi Nishimura, Tokyo, JP;
Takeshi Yamamoto, Tokyo, JP;
Hideshi Sakashita, Tokyo, JP;
Tomonobu Sato, Tokyo, JP;
Akio Yamamoto, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
A nozzle repair method and a nuclear reactor vessel include: removing a trepanning portion () as a connection portion with respect to an in-core instrumentation cylinder () in a groove-welding portion (); removing the in-core instrumentation cylinder () from a lower end plate (); forming a plug attachment opening () by removing the groove-welding portion (); applying a pressing load to the lower end plate () by attaching a plug () to the plug attachment opening (); and welding and fixing the plug () attached to the plug attachment opening (). Accordingly, since a repair is easily performed, it is possible to improve the workability and to decrease a repair cost.