Mitsubishi Heavy Industries Limited

Tomochika Hamamoto

Takeshi Yamamoto

Hiroshi Shimizu

Nobuyuki Hori

Yoichi Iwamoto

Koji Okimura

Kazuyuki Hinami

Takao Konno

Yutaka Nishitsuji

Akio Minamiyama

Hideshi Sakashita

Tsuyoshi Nishimura

Kenichi Kawanishi

Ryuichi Nagase

Yukihide Shimazu

Norimasa Mori

Masahito Matsubara

Kotoyo Mizuno

Yoshiyuki Miyoshi

Yoshihisa Fujiwara

Keisuke Sasajima

Ikuo Otake

In an installation device of a reactor repair device and a method, an installation pole () connected with an upper portion of a water jet peening device (), a lifting device () that can suspend and support an upper portion of the installation pole () and can lift the installation pole () from a work floor (), a moving device () that can move the lifting device () in two directions intersecting in a horizontal direction, and a position adjustment device () that can move the installation pole () in the horizontal direction in a state where the installation pole () is supported by the lifting device ().

Installation device of reactor repair device and method

Provided is a water jet peening apparatus and a water jet peening method including: a clamping cylinder () which is able to be disposed at the outer peripheral side of an instrumentation nozzle () with a predetermined gap therebetween; a clamping piece () which is able to fix the clamping cylinder () to the instrumentation nozzle (); a nozzle guide () which has a cylindrical shape, is provided inside the clamping cylinder (), and is positioned to a position adjacent to the upper end of the instrumentation nozzle (); an inner surface WJP nozzle () which is movable upward and downward inside the nozzle guide (); and a drainage hole () which radially penetrates the nozzle guide (). Accordingly, it is possible to improve the safety of the operation by preventing a thimble tube from being popped out due to a water jet peening operation.

Water jet peening apparatus and water jet peening method

Apparatus for replacing a support pin for a control rod cluster guide tube. The support pin can fix the guide tube to a core plate. The apparatus can be used submerged in water. A movement device can hold and move the guide tube along a frame. A retrieval manipulator can remove an old support pin from the guide tube. A supply manipulator can provide a new support pin to the guide tube. A rotating means imparts rotation for loosening a nut from an old support pin, and for tightening a nut to a new support pin. A control device calculates variation in distance between the nut and the support pin on the basis of the rotation. The control device controls movement of the guide tube along the frame.

Support pin replacing apparatus for control rod cluster guide tube

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).

Nozzle repairing method and nuclear reactor vessel

A clearance increasing jig of a heat transfer tube, includes: a jig main body inserted into a clearance between adjacent heat transfer tubes; an inflow hole provided in the jig main body and configured to allow a fluid to flow into the jig main body; and an increasing unit provided in the jig main body and configured to increase the clearance as the fluid flows into the jig main body.

Clearance increasing jig of heat transfer tube and additional installation method of vibration suppression member

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Tokyo, Japan

Tomochika Hamamoto