Patent
1979-01-15
1981-09-08
Cangialosi, S. A.
176 36R, G21C 1700, G21C 1920
Patent
active
042882907
ABSTRACT:
In apparatus for exchanging a control rod drive mechanism of a nuclear reactor of the type comprising a horizontal platform supported to be rotatable in a working chamber disposed below a reactor pressure vessel and a traveling carriage traveling on a rail assembly laid on the platform, there is provided a beam attached to the traveling carriage to be swingable between the vertical and horizontal positions and provided with a carrier for vertically moving the control rod drive mechanism. A holding device is secured to the beam so as to hold the control rod drive mechanism when the beam is moved to the horizontal position. The bolts which are used to connect the control rod drive mechanism to a housing in the pressure vessel are loosened and clamped by a bolt mounting device, which is conveyed in and out of the passage of movement of the carrier. There is further provided a carriage for receiving the control rod drive mechanism when the beam is moved to the horizontal position and for conveying the mechanism into an inspection chamber for inspecting the control rod drive mechanism.
REFERENCES:
patent: 3955692 (1976-05-01), Cody et al.
patent: 4158600 (1979-06-01), Akimoto et al.
patent: 4175000 (1979-10-01), Jabsen
Imada Takahiko
Katsuma Shinichi
Ohya Isao
Saima Tooru
Sato Hideo
Cangialosi S. A.
Tokyo Shibaura Denki Kabushiki Kaisha
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