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Séparation de l'américium : Développement d'un nouveau procédé d'extraction liquide-liquide

Abstract : The separation of minor actinides from spent nuclear fuels would allow to significantly reduce the long-term radiotoxicity and heat power of vitrified high activity waste. One strategy would consider the recycling of americium alone, leaving curium in final waste with fission products. In this framework, a liquid-liquid extraction process called EXAm (Extraction of Americium) was developed to separate americium alone from curium and other fission products (especially lanthanides). This separation is challenging considering very similar physico-chemical properties of americium and curium. In EXAm the selectivity is reached by introducing the TEDGA complexing agent in the high acidity feed solution of the process. Another process was also developed in the European SACSESS project using TPAEN ligand as a selective americium stripping agent in low acidity solution.
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Cécile Marie, Vincent Pacary, Marie-Christine Charbonnel, Manuel Miguirditchian. Séparation de l'américium : Développement d'un nouveau procédé d'extraction liquide-liquide. L'Actualité Chimique, Société chimique de France, 2016, 108-409, pp.109-111. ⟨cea-02389253⟩



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