Method for treating a radioactive liquid waste and radioactive waste treatment apparatus

摘要

PROBLEM TO BE SOLVED: To provide a radioactive waste liquid treatment method capable of adjusting a final pH of radioactive waste liquid to a neutral region (pH 4 to 9) while suppressing addition of treatment processes and increase of radioactive waste.;SOLUTION: A filtration device 2 is connected to a colloid removal device 3. A most upstream adsorption tower 6 in an adsorption device 5 is connected to the colloid removal device 3. The colloid removal device 3 includes electrostatic filters 4. The adsorption towers 6 in the adsorption device 5 are sequentially connected. An adsorption tower 21 loaded with oxine-impregnated activated carbon is arranged downstream of the adsorption device 5. A discharge pipe 14 is connected to the adsorption tower 21. Not less than 1 μm of particles contained in radioactive waste liquid are filtered out by the filtration device 2 and negatively charged colloids are filtered out by the positively charged electrostatic filters 4. Radionuclides are removed by the adsorption device 5. Heavy metal ions contained in the radioactive waste liquid from the adsorption device 5 are removed by the adsorption tower 21. Furthermore, a pH of the radioactive waste liquid is adjusted to fall within a range of 4 to 9.;COPYRIGHT: (C)2015,JPO&INPIT