Control rod drive mechanism

Details Control rod drive mechanism Control rod drive mechanism

1996-12-24

1998-07-07

Pihulic, Daniel T.

Induced nuclear reactions: processes, systems, and elements

Reactor structures

With particular control rod guide structure

376230, 376233, 376262, G21C 716

Patent

active

057780340

ABSTRACT:
This control rod drive limiter removes the need for piping for extraction drive, increases the reliability of linkage with respect to the control rod, and removes the need of a speed limiter for the control rod, since there is no need to assume that the linkage might be released, thus reducing the building costs.
A stop piston 112 is disposed so as to cover a buffer piston 110 and a buffer spring 111 from above, rollers 113 are disposed above this stop piston 112, and the lower end of a piston tube 107 is fixed to a flange 103a in such a manner that the piston tube 107 does not move in the axial and peripheral directions. A collet piston 115, collet fingers 116, and a return spring 117 are disposed between an outer tube 104 and a cylinder tube 105. A guide cap 120 is disposed at the upper end of the outer tube 104. Guide grooves 106c that engage with the rollers 113 are provided in the index tube 106. In order to omit the speed limiter of the control rod, the connection with the control rod is implemented by a bayonet coupling 106a provided at the upper end of the index tube 106.

REFERENCES:
patent: 4092213 (1978-05-01), Mishimura
patent: 4978494 (1990-12-01), Rinker
patent: 5331675 (1994-07-01), Hosoya et al.

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