CHALMEX FS-13 investigations for process implementation
Licentiate thesis, 2020
One partitioning option being developed is the Grouped ActiNide EXtraction (GANEX) process, which is a liquid-liquid extraction concept. In the Chalmers GANEX (CHALMEX) version, two extractants, tri-n-butyl phosphate (TBP) and 6,6’-bis-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzol-[1,2,4]-triazin-3-yl)-[2,2’]-bipyridine (CyMe4-BTBP) are combined for the direct separation of the transuranic elements from a spent nuclear fuel solution. The extractants are dissolved in phenyl trifluoromethyl sulfone (FS-13). The focus of the work presented in this thesis has been the optimisation and evaluation of the CHALMEX system for scaled up operations. Knowledge required for later process simulations, such as distribution ratios of all relevant elements over a range of acid concentrations, has been established. A fission product handling strategy using bimet and mannitol as masking agents has been suggested, although an efficient nickel and cadmium handling strategy is still required.
Thea Lyseid Authen
Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry
Authen T. L., Wilden, A., Halleröd, J., Schneider, D., Kreft, F., Modolo, G. and Ekberg, Ek. Batch Tests for optimisation of Solvent Composition and Process flexibility of the CHALMEX FS-13 Process.
Authen, T. L., Wilden, A., Schenider, D., Kreft, F., Modolo, G. and Ekberg, C. Batch flowsheet test of a GANEX-type process: the CHALMEX FS-13 process
GEN IV Integrated Oxide fuels recycling strategies (GENIORS)
European Commission (Horizon 2020), 2017-01-01 -- 2022-12-31.
Areas of Advance
Chemical Process Engineering
Chalmers University of Technology
Opponent: Frank Lewis, Northumbria University, United Kingdom