Cel High-level waste partitioning constitutes one of the key step of any advanced management strategy for radioactive waste aiming at transmutation of long-lived radionuclides into short-lived ones. The main objective of this research activity is the demonstration of the suitability of new types of diamides as well as triazine-based compounds for the removal of actinides from high level liquid waste and the subsequent purification of minor actinides from rare earths respectively. This research activity is closely coordinated with that under study at the KfK-Karlsruhe on the same subject.A wide range of routes for the synthesis of diamides and alkyltriazines (TPTZ) has been investigated. Significant quantities of the diamides may be prepared by a modification of established reactions using malonyldichloride. A new route for the synthesis of alkylTPTZ compounds has been developed.The extraction properties of diamide molecules have also been the subjects of numerous studies such as: suppression of third phase formation when extracting nitric acid or nitrate salts by diamides in solution in aliphatic diluents by the selection of proper alkyl groups of the diamide; study of the experimental conditions to achieve the americium (III)/iron (III) separation by kinetic means; study of the actinide (III)/lanthanide (III) separation from aqueous thiocyanate/nitrate solutions using diamide extractants, alone or in synergistic combination with quaternary ammonium salts.Work programme: This study will comprise the implementation of the following steps: - Synthesis of new organic extractants (diamides, triazine-based extractants, alpha-hydroxo or 2-oxo carboxylic acids)- Extraction tests- Extractants stability assessment- Partitioning flow-sheets- Counter-current experiments- Scaling-up of the preparation procedure for diamides/triazine-based extractants- Solvent regeneration- Cooperation within the Community Dziedzina nauki engineering and technologyother engineering and technologiesnuclear engineeringnuclear waste managementnatural scienceschemical sciencesorganic chemistryorganic acidsnatural scienceschemical sciencesnuclear chemistryradiation chemistry Program(-y) FP2-RADWASTOM 4C - Specific research and technical development programme (Euratom) in the field of management and storage of radioactive waste, 1990-1994 Temat(-y) A.2.5 - Potentialities of transmutation of long-lived radionuclides Zaproszenie do składania wniosków Data not available System finansowania CSC - Cost-sharing contracts Koordynator Commissariat à l'Energie Atomique (CEA) Wkład UE Brak danych Adres Centre d'Études de Fontenay-aux-Roses 60-68 avenue du Général Leclerc 92265 Fontenay-aux-Roses Francja Zobacz na mapie Koszt całkowity Brak danych
