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A micro hot test of the Chalmers-GANEX extraction system on used nuclear fuel

Lovisa Bauhn (Institutionen för kemi- och bioteknik, Kärnkemi) ; Marcus Hedberg (Institutionen för kemi- och bioteknik, Kärnkemi) ; Emma Aneheim (Institutionen för kemi- och bioteknik, Kärnkemi) ; Christian Ekberg (Institutionen för kemi- och bioteknik, Kärnkemi) ; Elin Löfström Engdahl (Institutionen för kemi- och bioteknik, Kärnkemi) ; Gunnar Skarnemark (Institutionen för kemi- och bioteknik, Kärnkemi)
International Nuclear Fuel Cycle Conference, GLOBAL 2013: Nuclear Energy at a Crossroads Vol. 1 (2013), p. 335-340.
[Konferensbidrag, refereegranskat]

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.

Nyckelord: Actinides; Inductively coupled plasma mass spectrometry; Nuclear energy; Nuclear fuel reprocessing; Testing Actinide extraction; Cyclohexanones; Distribution ratio; Extraction systems; Minor actinide; Multi stage; N-octanol; Trace concentrations



Denna post skapades 2014-07-22. Senast ändrad 2015-11-05.
CPL Pubid: 200664

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kärnkemi (2005-2014)

Ämnesområden

Kärnkemi

Chalmers infrastruktur