Induced nuclear reactions: processes – systems – and elements – With control of reactor – By movement of control element or by release of neutron...
Patent
1996-09-27
1998-08-11
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
With control of reactor
By movement of control element or by release of neutron...
376245, G21C 712
Patent
active
057938261
ABSTRACT:
A control rod mechanism for transmitting the rotation of an electric motor via a drive shaft to an elevator apparatus for raising and lowering a hollow piston on an upper end thereof, which is provided a control rod that controls the output of a nuclear reactor. The control rod mechanism is used to insert the control rod into a reactor core or remove it therefrom, and also to rapidly insert the control rod into the reactor core by the injection of hot water to force the hollow piston upward. The control rod mechanism includes a magnetic coupling having an inner magnet, which is divided into a plurality of parts and is disposed at a lower portion of the drive shaft in order to transmit the rotational power of the electric motor to the drive shaft. The control rod mechanism also includes a drive-side outer magnet, which is divided into a plurality of parts and is provided on a rotary shaft of the electric motor in an arrangement on an outer side of the inner magnet. The control rod mechanism further includes a circular cylindrical outer yoke on an inner surface of which the outer magnet is mounted on. The radial-direction position of an outer magnet installation surface on the outer yoke is the same as or further inward with respect to the radial-direction position of an inner surface of the outer yoke that is above the outer magnet installation surface.
REFERENCES:
patent: 3980950 (1976-09-01), Kutsevalov et al.
patent: 4933800 (1990-06-01), Yang
patent: 5089211 (1992-02-01), Dillmann
Patent Abstracts of Japan Vol. 095, No. 009, 31 Oct. 1995 & JP 07 159577 A (Toshiba Corp) 23 Jun. 1995.
Patent Abstract of Japan Vol. 008, No. 139 (E-253, 28 Jun. 1984 & JP 047945 A (Shinano Denki Kk), 17 Mar. 1984.
Patent Abstracts of Japan Vol. 96, No. 7, 31 Jul. 1996 & JP-A-08 082690 (Toshiba Corp).
Patent Abstract of Japan Vol. 010, No. 236 (E-428), 15 Aug. 1986 & JP-A-61 069365 (Hitachi Ltd), 9 Apr. 1986.
Patent Abstracts of Japan Vol. 010, No. 248 (E-431), 26 Aug. 1986 & JP-A-61 076061 (Daido Steel Co Ltd), 18 Apr. 1986.
Sato Yoshifumi
Tanaka Nobuyuki
Watanabe Yukio
Kabushiki Kaisha Toshiba
Wasil Daniel D.
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