Abstract: According to an embodiment, a traversing incore probe valve support has: a valve bed fixed to a traversing incore probe valve provided in a traversing incore probe guide tube extending to outside of a reactor containment vessel; a stand provided on a floor surface outside the reactor containment vessel; and a displacement allowing member that connects the stand and valve bed in such a manner that they can be displaced in an axial direction of the traversing incore probe guide tube. The displacement allowing member may include: a lower slide rail fixed to the stand valve bed and having an upward contact surface; and an upper slide rail fixed to the valve bed and having a downward contact surface that can be slid in the axial direction of the traversing incore probe guide tube while contacting the upward contact surface.

Abstract: According to an embodiment, a traversing incore probe valve support has: a valve bed fixed to a traversing incore probe valve provided in a traversing incore probe guide tube extending to outside of a reactor containment vessel; a stand provided on a floor surface outside the reactor containment vessel; and a displacement allowing member that connects the stand and valve bed in such a manner that they can be displaced in an axial direction of the traversing incore probe guide tube. The displacement allowing member may include: a lower slide rail fixed to the stand valve bed and having an upward contact surface; and an upper slide rail fixed to the valve bed and having a downward contact surface that can be slid in the axial direction of the traversing incore probe guide tube while contacting the upward contact surface.

Abstract: A TIP drive unit that calculates a cable drive torque stably is provided. In accordance with the invention, Traversing In-core Probe (TIP) drive unit includes a housing, a storage reel configured to storage the probe cable, a drive mechanism including a motor, and configured to feed the probe cable form the storage reel and spool the probe cable onto the storage reel, a motor controller configured to drive the motor at a predefined rotating speed, a processor configured to calculate a cable drive torque that is a torque necessary for moving the TIP and the probe cable by using a value of supply power necessary for driving the motor, a value of the predefined rotating speed of the motor, and a loss torque that is a torque necessary for driving the drive mechanism, and a noise filter configured to remove noise included in a signal indicating the value of the supply power.

Abstract: A cutting valve, for example, for a transversing incore probe system, comprises a valve box, a cylinder formed to the valve box, a piston disposed in the cylinder to be slidable therein, a cutting blade mounted to one end of the piston, a powder plug which is provided to another end of the piston and in which a powder is filled up, the powder being exploded by the operation of the powder plug, and a through hole, through which a cable or wire to be cut by the cutting blade penetrates, formed to the cylinder so as to extend in a direction normal to the sliding direction of the piston and to communicate with an inside of the cylinder. The piston is slid together with the cutting blade in an accelerated manner at a time when the powder is exploded. A kind and an amount of the powder are predetermined so that the piston is accelerated in the sliding motion in the cylinder at a speed of more than 40 m/sec.