Patent ID: 9589682
Date: 2017-03-07
CPC Classifications: G21C,Y02E

Claim:
1. An apparatus for controlling a control rod of a nuclear reactor of a nuclear power plant, wherein the control rod is configured to be inserted into or withdrawn from the nuclear reactor, the apparatus comprising: a control rod, wherein the control rod includes recesses; a first controller operable to output a signal to insert or withdraw the control rod; a mechanical portion configured to perform insertion or withdrawal of the control rod in response to the signal output by the first controller, the mechanical portion comprising a latch engagement portion disposed at an upper end of the control rod, a stop latch electromechanically moveable to restrain the control rod by an engagement with the latch engagement portion, a moving latch electromechanically moveable to be fixed to the latch engagement portion, and a lift coil operable to insert or withdraw the control rod by lifting or lowering the moving latch fixed to the latch engagement portion; a detector operable to detect a position or a speed of the control rod when the control rod is being inserted or withdrawn by the mechanical portion; and a brake configured to stop the control rod by force, wherein the brake includes a stopper configured to be inserted into a recess of the recesses comprising a first recess, and wherein the stopper comprises an inclined surface; and a second controller operable to separately control the brake independent of the first controller, wherein the second controller is configured to operate the brake in response to a brake signal being received from the detector.