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Extraction Behavior of Europium Relevant to PUREX Process |
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PP: 59-67 |
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doi:10.18576/jrna/060109
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Author(s) |
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S.Ganesh,
N.Desigan,
N.K.Pandey,
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Abstract |
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| The extraction behaviour of europium (Eu (III)) from nitric acid by the PUREX solvent, tri-butyl phosphate (TBP) in diluent n-dodecane (n-DD), has been brought out in this article. The feasibility of decontaminating the product streams in the PUREX process from Eu is established and is compared with other neutron poisons like Gd and Sm. The influence of the factors affecting the extraction such as nitric acid concentration, TBP concentration, metal ion concentration, temperature and the presence of uranium, on Eu (III) extraction has been investigated. The experimental results indicate that Eu(III) has a slightly higher extraction coefficient in TBP than Sm (III) and less than Gd(III). The temperature was found to be inversely proportional to the distribution coefficient of Eu (DEu) with an enthalpy change of ΔH = -56.08 ± 2.1 kJ/mol. High separation factors between U(VI) and Eu (III) has ensured the feasibility of Eudeconta mination under typical FBR spent fuel reprocessing conditions. |
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