The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 1981
Filed:
Jan. 15, 1979
Tooru Saima, Tokyo, JP;
Isao Ohya, Yokohama, JP;
Takahiko Imada, Akishima, JP;
Hideo Sato, Hachioji, JP;
Shinichi Katsuma, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kanagawa, JP;
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.