## 4 Conclusions  
The successful application of the ALSEP process in 1 cm centrifugal contacts was demonstrated. Trivalent Am and Cm were recovered with high purity from a simulated raffinate solution and only slight losses of An(III) to the Ln product were observed. These losses can be minimized using a higher number of An stripping stages. The demonstration tests described in this paper used an improved Ln stripping section. The use of TEDGA proved very successful in almost quantitative stripping of trivalent metal ions, which is an improvement over previous demonstration tests. The spent solvent only contained slight contaminations of iron, probably from slow corrosion of the stainless-steel contactor housing, which should be addressed before implementation on a larger scale.  
The following are available online at [[http://www.mdpi.com/2076-3417/10/20/7217/s1](http://www.mdpi.com/2076-3417/10/20/7217/s1)]([http://www.mdpi.com/2076-3417/10/20/7217/s1](http://www.mdpi.com/2076-3417/10/20/7217/s1)), Table S1: Distribution ratios \(D\), mass balances, and stage efficiencies in the extraction single centrifugal contactet, Table S2: Feed concentrations, distribution ratios \(D\), mass balances, and stage efficiencies in the Scrub 2 single centrifugal contactor test, Table S3: Feed concentrations, distribution ratios \(D\), mass balances, and stage efficiencies in the An stripping single centrifugal contactor test, Table S4: Feed concentrations, distribution ratios \(D\), mass balances, and stage efficiencies in the Ln re-extraction single centrifugal contactor test, Table S5: Distribution ratios \(D\) as a function of the HNO\({}_{3}\) and \(N\),\(N\),\(N^{\prime}\),\(N^{\prime}\)-tetraethyl-diglycolamide (TEDGA) concentrations in the Ln stripping batch tests, Table S6: Feed concentrations, distribution ratios \(D\), mass balances, and stage efficiencies in the Ln stripping single centrifugal contactor test, Table S7: \(D\) values used for the flowsheet calculations with the AMUSE code, Figure S1: Am and Cm stage profiles of the Actinide Lanthanide Separation Process (ALSEP) demonstration test (data from alpha spectrometry), Figure S2: Am, Cm, and Eu distribution ratios in the stages of the ALSEP demonstration test (Am, Eu data from inductively coupled plasma mass spectrometry (ICP-MS) measurements, and Cm data from alpha spectrometry), Figure S3: La and Ce stage profiles of the ALSEP demonstration test (data from ICP-MS measurements), Figure S4: Pr and Nd stage profiles of the ALSEP demonstration test (data from ICP-MS measurements), Figure S5: Sm and Gd stage profiles of the ALSEP demonstration test (data from ICP-MS measurements).  
Conceptualization, A.W., G.M., G.J.L., A.V.G., J.D.L., and A.G.; investigation, A.W., F.K., D.S., Z.P., G.M., G.J.L., A.V.G., J.D.L., and A.G.; software, J.D.L. and A.G.; validation, A.W., G.M., G.J.L., A.V.G., J.D.L., and A.G.; data curation, A.W., F.K., D.S., and Z.P.; writing--original draft preparation, A.W.; writing--review and editing; F.K., D.S., Z.P., G.M., G.J.L., A.V.G., J.D.L., and A.G.; visualization, A.W.; supervision, G.M., G.J.L., A.V.G., J.D.L., and A.G.; project administration, G.M.; funding acquisition, G.M., J.D.L., and A.W. All authors have read and agreed to the published version of the manuscript.  
Figure 10: Mo and Zr stage profiles of the ALSEP demonstration test (data from ICP-MS measurements).  
Funding: Funding for this research was provided by the Battelle Energy Alliance, LLC, under Contract No. 00216406 and the European Commission through the GEN IV Integrated Oxide Fuels Recycling Strategies (GENIORS) project, grant agreement No. 730227. Additionally, this work was funded by the U.S. Department of Energy's Office of Nuclear Energy, through the Nuclear Technologies Research and Development Program. Pacific Northwest National Laboratory is operated by Battelle Memorial Institute for the U.S. Department of Energy under contract DE-AC05-76 RL01830.  
The authors declare no conflict of interest.