27.11.2014 - 11:12
Batch tests are done to study the chemical behaviour of an organic extractant to obtain relevant extraction data for implementation in a centrifugal extractor experiment. A typical batch experiment is shown below:
|Typical batch experiment|
Column extraction chromatography is used for separations in which a high purity of the product is needed. At HCT methods for the separation of Cm from old Cf-sources and Sr/Y-90 from spent fuel have been developed.
In order to demonstrate full processes, a set-up of 16 centrifugal extractors has been installed in a dedicated reprocessing hot-cell. Recently new centrifuges will replace the old ones.
|"old" centrifuge extractor set-up installed in the hot cell|
|Nex battery under cold testing|
Hollow fibre modules are small columns filled with fibres in which the extraction takes place. Very high aqueous to organic flow-rate ratios can be used which make decontamination of secondary waste process solutions possible. In collaboration with INE, FZK a system is being installed in a hot-cell.
|Part of HFM sysytem (to be installed in a hot cell)|
The experimental facility for investigation of basic electrochemistry or development of separation methods for actinides in molten salt media is a double glove-box. The outer and inner box is under nitrogen and purified argon atmosphere, respectively, and makes experiments possible in an atmosphere containing less than 10 ppm oxygen and water. The box is equipped with a water cooled well type of oven in which an electrochemical set-up can be lowered down.
|The double glove-box for basic molten salt|
For the demonstration of pyrochemical reprocessing using genuine spent fuel materials a dedicated hot-cell has been manufactured and equipped with a well-type of oven in which different experimental set-ups can be used. In particular an electrorefiner has been constructed for the separation of U and Pu from fission products by electrorefining of metallic fuel in molten chloride salt. The hot-cell has recently been transported from a cold-lab to the hot-cell facilities in HCT where it has been lead shielded. In the future pyrochemical reprocessing of irradiated MA containing metallic fuel will be demonstrated.
|Hot Cell Caisson: Outside view|
|Hot Cell Caisson: Inside view|
European Commission Joint Research Centre Institute for Transuranium Elements
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