%0 Conference Paper %F Oral %T The simple solution modeling implemented in the PAREX code to simulate solvent extraction operations %+ Département de recherche sur les procédés pour la mine et le recyclage du combustible (DMRC) %A Sorel, Christian %A Baron, Pascal %A Dinh, Binh %A Heres, Xavier %A Montuir, Marc %A Pacary, Vincent %Z Toward and over the Fukushima Daiichi accident, Chiba (Japan), 11-16 Dec 2011; Available as CD-ROM Data in PDF format, Paper ID: a11{sub 1}9{sub 5}01646.pdf; 38 refs., 9 figs., 1 tab.; Related Information: In: The 10th international conference. GLOBAL 2011. Toward and over the Fukushima Daiichi accident. Proceedings| [2136 p.] %< avec comité de lecture %B GLOBAL 2011 - the 10th of the international GLOBAL conference %C Makuhari, Japan %S The 10th international conference. GLOBAL 2011. Toward and over the Fukushima Daiichi accident. Proceedings| [2136 p.] CDROM %P 392588 %8 2011-12-11 %D 2011 %K modelling %K activity coefficient %K simple solution %K actinide %K solvent extraction %K separation %K computer simulation %Z Chemical Sciences/Chemical engineering %Z Chemical Sciences/Inorganic chemistry %Z Chemical SciencesConference papers %X 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. %G English %2 https://cea.hal.science/cea-03541241/document %2 https://cea.hal.science/cea-03541241/file/Global2011_fullpaper%20_392588.pdf %L cea-03541241 %U https://cea.hal.science/cea-03541241 %~ CEA %~ DEN %~ DEN-MARCO