Oblon, McClelland, Maier & Neustadt, L.L.P.
Reactor bottom repairing method
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.
KABUSHIKI KAISHA TOSHIBA
G G G Y G B
G21C G21C G21C Y02E G21C B23K
inventional inventional inventional additional additional additional
Masaki Yoshio Wataru Yuuichi Satoshi Masakazu Masataka Taiji Masahiro Hiromi Hiroyuki
Yoda Hamamoto Kono Motora Okada Abura Tamura Kobayashi Takeuchi Kato Miyasaka