Patent Number: 054224926
Section: claims

1. A device for calibrating a criticality detector for a nuclear fuel manufacturing plant having a radiation source, the device comprising: a radiation protective holder for containing the radiation source, the holder being aligned with the criticality detector along an axis;  measuring means connected to the criticality detector and positioned near the holder parallel with the axis; and  guide means connected to the holder and movably connected to the measuring means for moving the holder and radiation source along the axis for being detected by the criticality detector and providing a calibration measurement for the measuring means. 2. The device according to claim 1, wherein the measuring means comprises a rod having a plurality of calibrations. 3. The device according to claim 2, wherein the guide means comprises an upper section spaced apart from a lower section, the upper section and the lower section being connected by a pair of spaced apart connecting bars, one connecting bar being connected to the holder. 4. The device according to claim 3, wherein the upper section is aligned in a horizontal plane with the radiation source. 5. The device according to claim 4, wherein the guide means further comprises a thumb screw. 6. The device according to claim 2, wherein the guide means is made of a nylon material.