Patent ID: 7764760

Claim:
An actuating apparatus that measures rotation of a jet pump beam bolt in a nuclear reactor, comprising: a socket member for engaging the jet pump beam bolt; a sleeve member configured to engage a handling pole, the sleeve member being rigidly connected to the socket member; an actuator hex rigidly connected between the socket member and the sleeve member in an axial direction, the actuator hex not rigidly connected to the socket member in a rotational direction and not rigidly connected to the sleeve member in the rotational direction, the actuator hex configured to engage a stationary tensioner so that as the socket member and the sleeve member rotate in the rotational direction, the actuator hex remains stationary; a displacement wheel rigidly attached to the actuator hex; and a displacement dial rigidly attached to the sleeve member or socket member, the displacement dial corresponding to the displacement wheel so as to permit rotational displacement measurement.