Objective
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
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology other engineering and technologies nuclear engineering nuclear waste management
- natural sciences chemical sciences organic chemistry organic acids
- natural sciences chemical sciences nuclear chemistry radiation chemistry
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
92265 Fontenay-aux-Roses
France
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