A micro hot test of the Chalmers-GANEX extraction system on used nuclear fuel
Paper i proceeding, 2013

In the present study, a "micro hot test" has been performed using the Chalmers-GANEX (Group ActiNide EXtraction) system for partitioning of used nuclear fuel. The test included a pre-extraction step using N,N-di-2- ethylhexylbutyramide (DEHBA) in n-octanol to remove the bulk part of the uranium. This pre-extraction was followed by a group extraction of actinides using the mixture of TBP and CyMe4-BTBP in cyclohexanone as suggested in the Chalmers-GANEX process, and a three stage stripping of the extracted actinides. Distribution ratios for the extractions and stripping were determined based on a combination of γ- and α-spectrometry, as well as ICP-MS measurements. Successful extraction of uranium, plutonium and the minor actinides neptunium, americium and curium was achieved. However, measurements also indicated that co-extraction of europium occurs to some extent during the separation. These results were expected based on previous experiments using trace concentrations of actinides and lanthanides. Since this test was only performed in one stage with respect to the group actinide extraction, it is expected that multi stage tests will give even better results.

Testing Actinide extraction

N-octanol

Cyclohexanones

Minor actinide

Actinides

Nuclear fuel reprocessing

Distribution ratio

Extraction systems

Multi stage

Inductively coupled plasma mass spectrometry

Nuclear energy

Trace concentrations

Författare

Lovisa Bauhn

Chalmers, Kemi- och bioteknik, Kärnkemi

Marcus Hedberg

Chalmers, Kemi- och bioteknik, Kärnkemi

Emma Aneheim

Chalmers, Kemi- och bioteknik, Kärnkemi

Christian Ekberg

Chalmers, Kemi- och bioteknik, Kärnkemi

Elin Löfström Engdahl

Chalmers, Kemi- och bioteknik, Kärnkemi

Gunnar Skarnemark

Chalmers, Kemi- och bioteknik, Kärnkemi

International Nuclear Fuel Cycle Conference, GLOBAL 2013: Nuclear Energy at a Crossroads

Vol. 1 335-340