| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently and certainly remove Co, Eu of a target nuclide from activation concrete, to make an installation space of a processor small by improving dewaterability, to suppress process costs, and to reduce a labor and costs of pH management. <P>SOLUTION: The present invention provides a processing method including: an extraction process 3 of immersing a ground product S consisting of activation concrete 1 obtained in a grinding process 2 in nitric acid solution M1; a neutralization process 4 of immediately raising the nitric acid solution M1 to an alkali region of ph7-12 to precipitate metal salt consisting of components of a target nuclide K1 of Co, Eu, and a non-target nuclide K2 such as Fe and Al contained in the ground product S; a washing process 5 of washing a precipitate T1 obtained in the neutralization process 4 with water W1; and an ether extraction process 6 of collecting the non-target nuclide K2 in a precipitate T2 after washing after the washing process 5 by ether extraction, after solving the precipitate T2 after the washing washed in the washing process 5 in hydrochloric acid. <P>COPYRIGHT: (C)2013,JPO&INPIT |
