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:
Jun. 28, 2016
Filed:
Mar. 29, 2013
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Takeshi Yamamoto, Tokyo, JP;
Tomochika Hamamoto, Tokyo, JP;
Nobuyuki Hori, Tokyo, JP;
Tsuyoshi Nishimura, Tokyo, JP;
Hideshi Sakashita, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
It is possible to improve the workability and the stress corrosion resistance by easily performing a repairing operation in a nozzle repairing method and a nuclear reactor vessel. The repairing method includes: removing a first connection portion ((trepanned portion)) with respect to an in-core instrument tube () in a groove-welding portion (); removing the in-core instrument tube () from a lower mirror (); leaving and grooving a second connection portion ((existing welding portion)) with respect to the lower mirror () in the groove-welding portion (); inserting a new in-core instrument tube (A) into an attachment hole (); and groove-welding (so as to form a new groove-welding portion ()) the inner side of the lower mirror () so as to fix the new in-core instrument tube (A).