Journal Article

FZJ-2023-04590

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interinstitutional Study of the New EURO-GANEX Process Resistance by Gamma Irradiation Test Loops

Sanchez-Garcia, I. (Corresponding author) ; Heres, X. ; Peterman, D. R. ; Galan, H. ; Costenoble, S. ; Broussard, S. ; Sinot, J. ; Grimes, T. S. ; Anderson, K. R. ; Jansone-Popova, S. ; Gullo, M. C. ; Casnati, A. ; Wilden, A.FZJ* ; Geist, A.

2023
American Chemical Society Columbus, Ohio

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Please use a persistent id in citations: doi:10.1021/acs.iecr.3c02884  doi:10.34734/FZJ-2023-04590

Abstract: As part of the homogeneous actinide recycling strategy, the EUROGANEXprocess is one of the most promising options to achieve the goal of minoractinides recovery. Improvements made to EURO-GANEX system have resulted in theemergence of the so-called New EURO-GANEX process, where the composition of thesolvent has been modified by replacing TODGA and DMDOHEMA with cismTDDGAin the organic phase and SO3-Ph-BTP with PyTri-Diol in the aqueousphase in order to resolve important issues. The objective of this work is 2-fold: evaluatethe gamma radiolytic resistance of the new EURO-GANEX process by dynamicirradiation conditions simulating the three main steps of the process and validate thedesign of CIEMAT Náyade, CEA Marcel, and INL irradiation loop devices since eachof them mimics different aspects of the real process. The Náyade and INL loops couldirradiate the organic and aqueous phases together, whereas in the CEA loop, theirradiated solvent is recycled continuously inside a platform with several stages ofmixer-settlers containing aqueous flows simulating the three main steps of the process. The extraction performances and changes inthe composition of the solvent have been analyzed during the irradiation experiment by different techniques: gamma spectrometryand ICP-MS/OES for cations or radioactive tracer extraction and HPLC-MS to identify and quantify the degradation compounds.Despite some differences between the three irradiation facilities, this interinstitutional study shows that these three comparative toolsprovide similar trends in the radiolytic stability of a liquid−liquid extraction system. Favorable extraction results for the differentsteps are obtained according to the static irradiation studies found in literature. However, the degradation of cis-mTDDGA isappreciable leading to degradation compounds, some of which form precipitates and produce important changes in viscosity,important aspects that must be addressed prior to the successful industrial application of the new EURO-GANEX process.

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Contributing Institute(s):

1. Nukleare Entsorgung (IEK-6)

Research Program(s):

1. 1412 - Predisposal (POF4-141) (POF4-141)
2. GENIORS - GEN IV Integrated Oxide fuels recycling strategies (755171) (755171)

Appears in the scientific report 2023

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Web of Science Core Collection

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