Invention Grant
- Patent Title: Reactor bottom repairing method
- Patent Title (中): 反应器底部修复方法
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Application No.: US13122330Application Date: 2009-10-02
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Publication No.: US09136026B2Publication Date: 2015-09-15
- Inventor: Yoshio Hamamoto , Yuuichi Motora , Hiromi Kato , Masahiro Takeuchi , Masataka Tamura , Satoshi Okada , Taiji Kobayashi , Masaki Yoda , Hiroyuki Miyasaka , Wataru Kono , Masakazu Abura
- Applicant: Yoshio Hamamoto , Yuuichi Motora , Hiromi Kato , Masahiro Takeuchi , Masataka Tamura , Satoshi Okada , Taiji Kobayashi , Masaki Yoda , Hiroyuki Miyasaka , Wataru Kono , Masakazu Abura
- Applicant Address: JP Tokyo
- Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee: KABUSHIKI KAISHA TOSHIBA
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2008-258981 20081003
- International Application: PCT/JP2009/067270 WO 20091002
- International Announcement: WO2010/038876 WO 20100408
- Main IPC: G21C13/00
- IPC: G21C13/00 ; G21C17/017 ; G21C13/036 ; G21C19/20 ; G21C17/01
Abstract:
A heating laser beam is emitted to a cracked portion to remove moisture from the cracked portion, and subsequently, a welding laser beam is emitted to the cracked portion to heat and melt the cracked portion. The heating laser beam and the welding laser beam are emitted to an entire surface of the cylindrical body inside the reactor such as a stub tube penetrating through and fixed to a reactor bottom portion and a crack of the welded portion between the cylindrical body and the reactor bottom portion to thereby prevent a new crack from occurring and reactor water from leaking.
Public/Granted literature
- US20110274229A1 REACTOR BOTTOM REPAIRING METHOD Public/Granted day:2011-11-10
Information query
