Fundamental aspects on extraction of elements by carbamoylmethylphosphine oxide in fluorinated diluents

Ozawa, Masaki

Partitioning and transmutation of long-lived radioactive nuclides in high active liquid wastes are required to lessen the environmental burden originated from the operation of nuclear fuel cycle. Against the present scenario by which probably requiring additional initial and running costs with adding new separation processes to the PUREX, a novel extraction system capable of recoverying all of actinide directly from dissolver solution is under developing. The presentation will report the fundamental extraction behaviors on fission products as well as actinides, and on the 3rd phase formation region for proposed extractant media. As a result, the specified ORGA (Organophosporic-fluoropole extractant for Recovery of Group of Actinides) process can extract -elements at highly U saturated organic media without splitting the unfavorable 3rd phase. Based on the experimental results, the validity of ORGA process will be referred.