| 摘要 |
PURPOSE:To obtain an apparatus which executes measurement of the density of surface contamination of a drum packed with a radioactive waste by a smear method at a high speed and automatically and which does not use any specific smear filter paper. CONSTITUTION:Arms 3a and 3b for wiping the top and bottom surfaces of a drum 1 are supported so that they can rotate horizontally and rotate a little vertically, and an arm 3c for wiping the lateral surface is supported so that it can rotate horizontally and move upward and downward. At the fore ends of these arms, heads 5a, 5b and 5c for wiping the drum which can be shaken around the longitudinal axes of the arms are provided. Drive motors for making these arms and heads move are provided. Each head for wiping is brought to a filter paper holder 4 for it by the motion of the arm thereof, picks up one top sheet of stacked filter paper in the holder, by vacuum suction, and after it is shaken in a proper direction, wipes the whole of each surface of the drum rotating on a drum support, by the filter paper, with the movement of the arm. Thereafter it is shaken upward, inserted from below into a radiation detector 6 for it with the movement of the arm and subjected to measurement of radiation of the filter paper, and then it is moved to a filter paper discharge element to release the filter paper.
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