MEASURING METHOD AND MEASURING INSTRUMENT FOR RADIOACTIVITY AND STRENGTH OF SOLIDIFIED BODY OF RADIOACTIVE WASTE

PURPOSE:To reduce the size of the instrument by disposing a radioactivity measuring section around the side face of a solidified body and an strength measuring section in the axial direction thereof. CONSTITUTION:The solidified body 3 of the radioactive waste solidified in a drum can 2 is placed on a turn table 1 and the weight is calculated by a load cell 6 in the state of disconnecting a driving device 4. The one side of the solidified body 3 is measured by disposing an ultrsonic height measuring machine 17, a solidified body diameter measuring machine 19 and a TV camera 18 in the upper part. Plural radiation measuring machines 10 are disposed around the drum can 2 and the turn table 1 is rotated vertically. The wave number and intensity of the radiations are then determined and the density of the solidified body 3 is determined the constituting elements are judged and the kinds and quantity of the radioactivity are calculated by a radioactivity computer 11. A strength computer 20 measures the strength by vibrating the solidified body 3 by means of a vibration oscillating plate 7 and determining resonance frequencies by a pickup 12. The radioactivity measuring section disposed around the side face of the solidified body does not shield the radioactivity measuring section disposed in the axial direction and the size of the instrument is reduced if the instrument is constituted in the above-mentioned manner.