Obiettivo Separation of long-lived actinides and fission products would reduce the radiotoxicity of Purex process high-level wastes. This would lower the costs and risks of final waste disposal The aim of the work is to obtain distribution data, which are applicable to the development of a solvent extraction process for the separation of plutonium, neptunium, americium, curium and technetium from the highly active Purex waste solution (HAW). The target decontamination factors are 50000 for Am and Cm, 1000 for Pu and 100 for Np. Application of solvent extraction for the treatment of highly radioactive materials is well developed. Existing knowledge of the chemistry and engineering of the method can serve as a starting point for the project work.Separation of long lived actinides and fission products would reduce the radiotoxicity of Purex process high level wastes. This would lower the costs and risks of final waste disposal. The aim of is work is to develop the flowsheet of a solvent extraction process for the separation of plutonium, neptunium, americium, curium and technetium from the Purex wastes. Application of solvent extraction for treatment of highly radioactive materials is well developed. Existing knowledge of the chemistry and engineering of the method can serve as a starting point for the project work.A report has been compiled which gives a critical survey of informations about the separation of long lived actinides and fission products from high level radioactive wastes. The experimental work was concentrated on the separation of transplutonides(III) from lanthanides(II). Less extensive was the investigation of the oxidation of neptunium(VI) before or during the extraction with tributyl phosphate (TBP).Work programme: Search for extractants or complexants which make it possible to separate transplutonides from fission lanthanides by solvent extraction. Measurement of distribution and kinetic data for the elements to be separated and for lanthanides, and the working out of a proposal of a flowsheet. Campo scientifico engineering and technologyother engineering and technologiesnuclear engineeringnuclear waste managementnatural sciencesphysical sciencesnuclear physicsnuclear fissionengineering and technologyenvironmental engineeringwaste managementnatural scienceschemical scienceselectrochemistryelectrolysisnatural scienceschemical sciencesinorganic chemistrytransition metals Programma(i) FP2-RADWASTOM 4C - Specific research and technical development programme (Euratom) in the field of management and storage of radioactive waste, 1990-1994 Argomento(i) A.2.5 - Potentialities of transmutation of long-lived radionuclides Invito a presentare proposte Data not available Meccanismo di finanziamento CSC - Cost-sharing contracts Coordinatore Forschungszentrum Karlsruhe Technik und Umwelt GmbH Contributo UE Nessun dato Indirizzo Weberstraße 5 76133 Karlsruhe Germania Mostra sulla mappa Costo totale Nessun dato
