| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an activated concrete processing method capable of efficiently removing critical nuclide: Co and Eu from an activated concrete. <P>SOLUTION: A method includes: a crushing process 2 for crushing the activated concrete 1; a first cleaning process 3 for soaking the crushed concrete S1 obtained in the crushing process 2 in a treatment liquid W1 to extract cobalt and europium contained in the crushed concrete S1; a solid-liquid separation process 4 for conducting a solid-liquid separation on the crushed concrete S2 and a treatment liquid W2 after the first cleaning process 3; and a recovery process 5 for recovering the cobalt and europium together with noncritical nuclide from the treatment liquid separated in the solid-liquid separation process 4. In the first cleaning process 3, the treatment liquid W1 is the nitric acid whose temperature is at 70°C or above and 150°C or below and the crushed concrete S1 is immersed in the treatment liquid W1 for 3 or more and 30 or less hours. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
