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Report No.

Reduction and resource recycling of high-level radioactive wastes through nuclear transformation; Extraction of Pd, Zr, Se and Cs having long lived radionuclides

Sasaki, Yuji; Morita, Keisuke; Suzuki, Shinichi; Shiwaku, Hideaki; Ito, Keisuke; Takahashi, Yuya*; Kaneko, Masaaki*

Pd, Zr, Se, and Cs have very long lived radioactivities. These are the aimed elements to recover from high level radioactive waste and transmutated in order to reduce the environmental burden. All metals aimed show the different chemical behavior, so the different conditions for the recovery have to be set up. The solvent extractions of Se, Zr, Pd and Cs from nitric acid into 1-octanol are performed. It was found that Se, Zr and Pd can be extracted by phenylenediamine, TODGA, and NTAamide, respectively. In addition, Cs can be extracted up to 56% by di-t-butyl-dibenzo-18-crown-6.



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