On a Solvent Extraction System for Recycling Used Nuclear Fuel with CyMe4-BTBP and TBP as Extracting Agents
Doctoral thesis, 2018
The original Chalmers GANEX process used cyclohexanone as the diluent, which had some drawbacks such as low flashpoint and exothermic reactions with concentrated nitric acid. In this work the focus has therefore been on a new diluent, phenyl trifluoromethyl sulfone (FS-13). Current studies have shown that a solvent based on FS-13 has several promising features such as good actinide extraction while the fission product extraction remains low, fast kinetics, efficient back-extraction using two stripping steps and high stability against both hydrolysis and radiolysis. Thermodynamic investigations have revealed that the system reacts exothermically during the metal extraction. The system also offers a high solubility of CyMe4-BTBP, creating a possibility to optimise the organic phase according to the used fuel composition. The solvent was found to perform well under plutonium loading conditions, showing great promise for future use in recycling of Generation IV fuels.
Solvent Extraction
CyMe4-BTBP
FS-13
GANEX
TBP
Author
Jenny Halleröd
Chalmers, Chemistry and Chemical Engineering, Energy and Material
Development of the Chalmers grouped actinide extraction process
Nukleonika,;Vol. 60(2015)p. 829-835
Journal article
Phenyl trifluoromethyl sulfone as diluent in a grouped actinide extraction process: extraction properties of the solvent components TBP and CyMe4-BTBP
Journal of Radioanalytical and Nuclear Chemistry,;Vol. 307(2016)p. 1711-1715
Journal article
Halleröd, J., Ekberg, C., Authen, T., Bertolo, L., Lin, M., Grüner, B., Svehla, J., Wagner, C., Geist, A., Panak, P., Aneheim, E.: On the basic extraction properties of a phenyl trifluoromethyl sulfone based GANEX system containing CyMe4-BTBP and TBP
Stability of phenyl trifluoromethyl sulfone as diluent in a grouped actinide extraction process
Journal of Radioanalytical and Nuclear Chemistry,;Vol. 304(2015)p. 287-291
Journal article
Halleröd, J., Ekberg, C., Authen, T., Aneheim, E.: Optimization of a GANEX system containing of CyMe4-BTBP and TBP in phenyl trifluoromethyl sulfone
Halleröd, J., Ekberg, C., Kajan, I., Aneheim, E.: Solubility thermodynamics of CyMe4-BTBP in various diluents mixed with TBP
Flera olika processer för återvinning av använt kärnbränsle har under de senaste årtiondena utvecklats. En av dem är den så kallade Grouped ActiNide EXtraction (GANEX) processen, ett vätske-vätskeextraktionssystem som bygger på principen av två vätskor som inte vill blandas, precis som vatten och olja. Det använda bränslet löses upp i syra som tillsätts till en organisk fas bestående av extraktionsagenter, molekyler som binder och skapar komplex med vissa specifika metaller. På detta sätt kan de önskvärda metallerna med högt energiinnehåll separeras ut och återanvändas till produktion av nytt bränsle.
I den här avhandlingen har en Chalmers-utvecklad GANEX process undersökts, men fokus på en nyutvecklad organisk fas. Systemets specifika egenskaper har studerats med avseende på extraktionsegenskaper, koncentrationer av extraktionsagenter i systemet, kemisk stabilitet av den organiska fasen samt systemets beteende vid höga plutonium koncentrationer.
Subject Categories
Renewable Bioenergy Research
Chemical Process Engineering
Energy Systems
Areas of Advance
Energy
ISBN
978-91-7597-738-6
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 4419
Publisher
Chalmers
KC-salen, Kemigården 4, Chalmers.
Opponent: Ken Nash, Washington State University, USA