Kabushiki Kaisha Toshiba

Arata Ito

Naruhiko Mukai

Yuji Sano

Chikara Konagai

Nobutada Aoki

Muneyoshi Kikunaga

Kouki Okazaki

Hitoshi Sato

Motohiko Kimura

Shuji Hirono

Shigeru Kyoda

A method of assembling a large-size plant and an assembling method for reducing a term of work are disclosed. Each of a crane operator in a crane operation room and site workers in a plant construction site is equipped with a picture I/O device and a voice I/O device. The crane operator and the site workers assemble the plant while sharing picture information of the picture I/O device and voice information of the voice I/O device with each other. A site remote control room vicinal to the plant construction site is connected via a radio transmission path to a host control center. The plant si assembled while the site workers, the crane operator room, the site remote control room and the central control room share the picture information and the voice information of their own with each other.

Method of assembling plant

An underwater laser processing method is carried out by irradiating, through a laser beam irradiation apparatus, a laser beam having a high output, a short pulse and a visible wavelength to a surface of a structure immersed in a water to improve residual stress of a material of the surface of the structure and remove a crack or a CRUD thereof. The laser beam irradiation apparatus comprises a pulse laser device suspended into a water in which a metal material is accommodated from an upper side thereof for irradiating a laser beam having a visible wavelength to a processing position, a beam strength adjusting device for adjusting an output per 1 pulse of a laser beam generated by the pulse laser device and a mechanism for adjusting a spot diameter and a multiplexing ratio of an irradiated beam.

Underwater laser processing method and apparatus

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Yokohama, Japan

Arata Ito