Control rod remote disconnect mechanism
AssigneeBWXT Advanced Technologies LLC
InventorsScott J. Shargots, Ryan Z. Ziegler, Jason C. Brown, David K. Haslet, Emily D. Fleming
Life of this patent
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Abstract
A control rod drive mechanism having a torque tube, a control rod assembly including a connecting rod and a spider, a lock cam assembly rotatably secured to a bottom end of the connecting rod and including a locking cam, and a locking collar disposed non-rotatably within the spider, the locking collar including a locking recess with an entry slot, wherein in a first axial position the lock cam assembly is rotatable with respect to the torque tube, and a second axial position the lock cam assembly is non-rotatable with respect to the torque tube.
Claims9
A control rod drive mechanism comprising:
- a torque tube with an inner surface defining a central bore;
- a control rod assembly including a connecting rod disposed within the central bore of the torque tube and a spider, the connecting rod being releasably securable to the spider;
- a lock cam assembly rotatably secured to a bottom end of the connecting rod, the lock cam assembly including a body portion and at least one locking cam extending radially-outwardly therefrom;
- and
- a locking collar disposed non-rotatably within the spider, the locking collar including an inner surface defining a central bore and at least one locking recess therein, the locking recess including an entry slot extending downwardly from a top edge of the locking collar;
- wherein the connecting rod is axially-movable with respect to the torque tube between a first position in which the lock cam assembly is rotatable with respect to the torque tube, and a second position in which the lock cam assembly is non-rotatable with respect to the torque tube.
Dependencies are inferred from the claim text.