Title:
CONTROL ROD DRIVE MECHANISM
Document Type and Number:
Japanese Patent JP3773729
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a control rod drive mechanism that makes it possible to reliably confirm a torque test on magnetic joints with the control rod drive mechanism installed in the lower part of a pressure vessel and can improve the workability in the test on the magnetic joints.
SOLUTION: The control rod drive mechanism for inserting control rods 12 into the core of a reactor and pulling them out from it is composed of a constraint condition detector 14 which detects the constraint condition of a piston hoisting and lowering mechanism including a hollow piston 11 when the control rods 12 are constrained at the upper or lower limit positions, a torque loading means 23 which is placed at the end on the side of an electric motor 1 for a rotational axis 2 and loads torque in the direction that constrains an inside magnetic joint 6 opposite to an outside magnetic joint 5 by revolving it through the rotational axis 2 on the basis of the detected constraint condition, a torque meter 22a which measures torque to be loaded and a position detector 3 which detects rotational positions of the rotational axis 2 when rotation torque is loaded.
More Like This:
Inventors:
Hirotaka Nakahara
Nori Sasaki
Shinzo Inoue
Nori Sasaki
Shinzo Inoue
Application Number:
JP34036699A
Publication Date:
May 10, 2006
Filing Date:
November 30, 1999
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G21C7/12; G21C7/16; G21C17/00; (IPC1-7): G21C7/12; G21C7/16; G21C17/00
Domestic Patent References:
| JP2001099974A | ||||
| JP10010264A | ||||
| JP5323086A | ||||
| JP8082694A | ||||
| JP4278497A | ||||
| JP10132977A | ||||
| JP4080693A | ||||
| JP4289496A |
Attorney, Agent or Firm:
Yukihiko Takada
Masaru Takenouchi
Masaru Takenouchi
Previous Patent: NONVOLATILE SEMICONDUCTOR MEMORY DEVICE AND MANUFACTURE THEREOF
Next Patent: METHOD FOR PRODUCING SPONGE TITANIUM
Next Patent: METHOD FOR PRODUCING SPONGE TITANIUM