| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for removing radioactive cesium, for which a temperature of heat processing for separating radioactive cesium from waste can be sufficiently lowered, and capable of satisfactory attaining a high radioactive cesium removal ratio and volume reduction of radioactive cesium contaminants at the same time.SOLUTION: The removal method according to the present invention includes a mixing step of mixing radioactive cesium-contaminated waste with a separation accelerator to obtain a processing object, a heating step of heating the processing object to volatilize the radioactive cesium contained in the processing object, and a washing step of water washing the processing object after the heating step to allow the radioactive cesium remaining in the processing object to elute. The separation accelerator is prepared by using two or more types of chlorides and contains a mixture or a double salt with a melting point of 700°C or lower. The separation accelerator further contains a calcium source. In the mixing step, slurry containing the separation accelerator and water is mixed with the waste to obtain the processing object.SELECTED DRAWING: Figure 18 |
