Kabushiki Kaisha Toshiba

Hiroaki Igakura

Motohiko Kimura

Katsuhiko Sato

Yutaka Togasawa

Yasuhiro Yuguchi

Masaki Yoda

Kenji Kurihara

Katsuhiko Naruse

Seiki Soramoto

Yuuji Yasuda

Satoshi Okada

Makoto Kondo

Makoto Ochiai

Mitsuaki Shimamura

Naruhiko Mukai

Yoshifumi Sato

Yuji Sano

Yoshiaki Ono

Yasumi Kitajima

Tatsuki Ogisu

A modular submersible repairing system includes a working unit having a tool module capable of repairing structures in a reactor. A scanning/pitching module is capable of being selectively connected to or disconnected from the tool module, and is provided with a scanning/pitching shaft for scanning or pitching the tool module. A submersible fan module is capable of being selectively connected to or disconnected from the scanning/pitching module. A first buoyant module keeps an orientation of the tool module. A base unit includes a manipulator module internally provided with an actuator driving mechanism. An adsorbing module is capable of being detachably mounted on the manipulator module and a wall. A second buoyant module keeps the orientation of the manipulator module. The scanning/pitching module and the manipulator module are provided with a submersible connecting device capable of being operated in water for engagement and disengagement.

Modular submersible repairing system and repairing method

A laser emitting head for irradiating a portion to be machined with laser beams outputted from a laser unit () incorporates an emitting head body having a light guide member () in the head for guiding the laser beams; a light converging lens () for converging the laser beams transmitted from the light guide member in the head; a reflecting mirror () for irradiating the portion to be machined with the converged laser beams; mirror rotating means () for holding the reflecting mirror to be rotative around the optical axis of the laser beam; distance-adjustment means () for adjusting the relative distance between the reflecting mirror and the converging lens; and moving means () for moving the reflecting mirror and the converging lens such that the relative distance is maintained so that the light guide member in the head. The converging lens and the reflecting mirror can be introduced/discharged with respect to a portion to be machined and formed in a narrow gap in an incore structure. As a result, a preventive-maintenance/repair operation using laser beams and arranged to be performed in a narrow gap in the incore structure can safely and efficiently be performed.

Laser emission head, laser beam transmission device, laser beam transmission device adjustment method and preventive maintenance/repair device of structure in nuclear reactor

Modular submersible repairing system

The present invention provides an underwater maintenance and repair technology of including a laser oscillator for generating a laser beam and a working head movably attached to the vicinity of a working target portion in the underwater and adapted to scan the laser beam to the working target portion, and further, independently fixing the working head to the vicinity of the working target portion, jointing an optical fiber cable to the working head by using a joint mechanism through a remote control operation, guiding a laser beam emitted from a laser oscillator via the optical fiber cable, and irradiating the laser beam from the working head to a surface of the working target portion while scanning it so as to achieve surface modification, surface working and decontamination.

Underwater maintenance repair device and method

Growing community of inventors

Yokohama, Japan

Hiroaki Igakura