PROBE HOLDER FOR OXIDE THICKNESS MEASUREMENT OF IRRADIATED FUEL ROD CAPABLE OF PREVENTING DAMAGES OF PROBE

PURPOSE: A probe holder is provided to prevent damages of a probe and measure the oxide thickness of a fuel rod in an accurate manner. CONSTITUTION: A probe holder comprises a holder unit(1) for holding a nuclear fuel rod(10) in such a manner that the nuclear fuel rod is slidable in a vertical direction; a main body(3) for elastically supporting the holder unit in all directions so as to correspond to the normal direction deviation of the nuclear fuel rod; an operation unit(5) mounted on one side of the main body so as to release the nuclear fuel rod held at the holder unit; a measurement unit(7) for measuring the oxide thickness of the nuclear fuel rod by using a probe(71) moving in forward and rearward directions in such a manner that the probe is contactable with or separable from the outer surface of the nuclear fuel rod; and a display unit for displaying the thickness measured by the measurement unit. The holder unit includes an inner block(12) having a rod hole for passage of the nuclear fuel rod; a connection block(13) extended to be connected to the measurement unit, and which has a probe hole for insertion of the probe; and a slidable block(19) arranged to be pressed toward the nuclear fuel rod by a spring(18).