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Uranium/plutonium and uranium/neptunium separation by the Purex process using hydroxyurea
Authors:Zhu Zhaowu  He Jianyu  Zhang Zefu  Zhang Yu  Zhu Jianmin  Zhen Weifang
Affiliation:(1) China Institute of Atomic Energy, P.O. Box 275-26, 102413 Beijing, P.R. China
Abstract:Hydroxyurea dissolved in nitric acid can strip plutonium and neptunium from tri-butyl phosphate efficiently and has little influence on the uranium distribution between the two phases. Simulating the 1B contactor of the Purex process by hydroxyurea with nitric acid solution as a stripping agent, the separation factors of uranium/plutonium and uranium/neptunium can reach values as high as 4.7·104 and 260, respectively. This indicates that hydroxyurea is a promising salt free agent for uranium/plutonium and uranium/neptunium separations.
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