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The simple solution modeling implemented in the PAREX code to simulate solvent extraction operations

Abstract : The solvent extraction systems devoted to uranium purification from crude ore to spent fuel involve concentrated solutions in which deviation from ideality can not be neglected. The Simple Solution Concept based on the behaviour of isopiestic solutions has been applied to quantify the activity coefficients of metals and acids in the aqueous phase in equilibrium with the organic phase. This approach has been validated on various solvent extraction systems such as trialkylphosphates, malonamides or acidic extracting agents both on batch experiments and counter-current tests. Moreover, this concept has been successfully used to estimate the aqueous density which is useful to quantify the variation of volume and to assess critical parameters such as the number density of nuclides.
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Christian Sorel, Pascal Baron, Binh Dinh, Xavier Heres, Marc Montuir, et al.. The simple solution modeling implemented in the PAREX code to simulate solvent extraction operations. GLOBAL 2011 - the 10th of the international GLOBAL conference, Atomic Energy Society of Japan; Japan Atomic Energy Agency, Dec 2011, Makuhari, Japan. pp.392588. ⟨cea-03541241⟩

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