Extraction behavior of fission products with tri--butyl phosphate by countercurrent multistage extraction in a uranium, plutonium, and neptunium co-recovery system

Nakahara, Masaumi; Nakajima, Yasuo  ; Koizumi, Tsutomu

To study the extraction behavior of fission products, the countercurrent multistage experiments were carried out with centrifugal contactors in the U, Pu, and Np co-recovery system. Neptunium was co-recovered with U and Pu using tri--butyl phosphate. The experimental results show that Zr was removed with a low HNO concentration scrubbing solution and Tc was decontaminated using a high HNO concentration solution. Other fission products were effectively decontaminated in the system.