DEVICE AND METHOD FOR PREVENTING CONTAMINANT DISPERSION WHEN RECOVERING RADIOACTIVE SUBSTANCES

PROBLEM TO BE SOLVED: To provide a device for preventing contaminant dispersion when recovering radioactive substances, which can recover them through pulverization while preventing dispersion thereof without using a sealed container.SOLUTION: A device for preventing contaminant dispersion when recovering radioactive substances, comprises: a suction unit 3 which has suction piping 11 to suck pulverized radioactive substances 1 and cooling water 8; a bulkhead 4 which is disposed to be movable in a vertical direction in the cooling water 8 in a manner that drifts upward when the cooling water 8 flows toward the suction piping 11 and sinks by own weight with a decreasing flow of the cooling water 8 toward the suction piping 11; and a supporting structure 5 which supports the bulkhead 4 so as to be movable in the vertical direction. The bulkhead 4 secures a flow passage which allows the radioactive substances 1 and the cooling water 8 to be sent to the suction piping 11 through suction operation of the suction unit 3 during operation to pulverize the radioactive substances 1 and prevents dispersion of the radioactive substances 1 and contaminated cooling water 8 by being sunk and brought into contact with a bottom face of a skeleton 9 with the decreasing flow of the cooling water 8 toward the suction piping 11.SELECTED DRAWING: Figure 1 【課題】密封容器を用いること無く、放射性物質の拡散を防止しながら、放射性物質を粉砕して回収可能な放射性物質回収時の汚染拡大防止装置を提供する。【解決手段】粉砕された放射性物質１及び冷却水８を吸引する吸引用配管１１を有する吸引装置３と、冷却水８中に上下方向に移動可能に配置され、吸引用配管１１に向かって冷却水８が流れることにより上方向に移動し、冷却水８の吸引用配管１１に向かう流れが低下するに従って自重により下方向に移動する隔壁４と、隔壁４を上下方向に移動可能に支持する支持構造物５とを備える。隔壁４は、放射性物質１の粉砕作業における吸引装置３の吸引動作による放射性物質１及び冷却水８の吸引用配管１１への流路を確保し、冷却水８の吸引用配管１１への流れの減少に伴って下方向に移動し、躯体９の床面に接することにより、放射性物質1及び汚染された冷却水８の拡散を防止する。【選択図】図１