Hitachi, Ltd.

Ryohei Miyahara

Hiroshi Hasegawa

Kouichi Ushiroda

Jun Miura

Masataka Aoki

Akinori Tajiri

Tomoyuki Hamada

Kohji Kamejima

Ikuo Takeuchi

Toshiaki Yoshinaga

Shigeru Ohcoshi

Hisako Okada

A method for handling an equipment inside a building by a crane installed outside; the method being employed when leading the wire hanging from the boom of a crane installed outside of a building (nuclear reactor containment vessel, into the building through an opening provided on the building, and lifting up or down an equipment inside said building by said wire. The said method includes a process for measuring by a three-dimensional measuring device which is positioned apart from the crane the shift of the boom caused by transfer of dead load of the equipment to the wire, in the course of transferring dead weight of the equipment between the wire and a structure inside the building, and correcting the position of the boom, by moving said boom up or down, back to a direction opposite to the shift so as to lift up the equipment vertically.

Method for handling an equipment inside a building by a crane installed outside

A cask is lifted from outside of a nuclear reactor building through an opening which is opened at a portion of the nuclear reactor positioned just above a nuclear reactor pressure vessel. By maintaining the cask under a lifted condition a shroud which is an internal structure of the nuclear reactor is transferred and inserted to the cask from the nuclear reactor vessel. After that, an inlet port of the cask is closed, and the cask together with the shroud is lifted outside of the nuclear reactor building through the opening. The internal structure of the nuclear reactor can be speedily carried from the nuclear reactor building with reduced exposure of operators to radioactivity from the radioactive internal structure.

Method of handling a nuclear reactor and an apparatus used in the handling method

A method of handling an internal structure of a nuclear reactor utilizing a receptacle such as a container or a cask. A cask, for example, is lifted from outside of a nuclear reactor building through an opening which is opened at a portion of the nuclear reactor positioned just above a nuclear reactor pressure vessel. While maintaining the cask under a lifted condition, a shroud, which is an internal structure of the nuclear reactor, is transferred and inserted to the cask from the nuclear reactor vessel. Thereafter, an inlet port of the cask is closed so that the cask substantially surrounds the shroud and substantially prevents radiation from the shroud passing therethrough. The cask together with the shroud is lifted outside of the nuclear reactor building through the opening. The internal structure of the nuclear reactor can be speedily carried from the nuclear reactor building with reduced exposure of operators to radioactivity from the radioactive internal structure.

Information with respect to the shapes and attaching positions of component parts which are necessary for a construction work is stored into a design information memory device by use of a keyboard, an image of a construction location is picked up by a TV camera before the component parts are actually processed, the image is processed to obtain observation information, and the shapes and attaching positions of the component parts are corrected using the observation information and the design information which has already been stored. The corrected information obtained by the correction is stored into a corrected information memory device. A processing device processes the component parts by preferentially using the corrected information. An attaching device attaches the processed component parts to the construction locations while using the corrected information.

Method and apparatus for constructing structures

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Hitachi, Japan

Ryohei Miyahara