Recovery of minor actinides from HLLW using the DIAMEX process

Serrano‐Purroy, Daniel; Baron, Pascal; Christiansen, Birgit; Malmbeck, Rikard; Sorel, C.; Glatz, Jean‐Paul

doi:10.1524/ract.93.6.351.65642

Cited by 137 publications

(74 citation statements)

References 3 publications

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“…The main objective (> 99.9% actinide separation) and a high fission product decontamination factor were achieved. The results are comparable with those obtained for the DIAMEX processes developed in France and within European projects [31].…”

Section: An(iii) + Ln(iii) Co-extraction Using Todga-based Solventssupporting

confidence: 85%

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

et al. 2012

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Summary. The selective partitioning (P) of long-lived minor actinides from highly active waste solutions and their transmutation (T) to short-lived or stable isotopes by nuclear reactions will reduce the long-term hazard of the high-level waste and significantly shorten the time needed to ensure their safe confinement in a repository. The present paper summarizes the on-going research activities at Forschungszentrum Jülich (FZJ), Karlsruher Institut für Technologie (KIT) and Institute for Transuranium Elements (ITU) in the field of actinide partitioning using innovative solvent extraction processes. European research over the last few decades, i.e. in the NEWPART, PARTNEW and EUROPART programmes, has resulted in the development of multi-cycle processes for minor actinide partitioning. These multi-cycle processes are based on the co-separation of trivalent actinides and lanthanides (e.g. by the DIAMEX process), followed by the subsequent actinide(III)/lanthanide(III) group separation in the SANEX process. The current direction of research for the development of innovative processes within the recent European ACSEPT project is discussed additionally. This paper is focused on the development of flow-sheets for recovery of americium and curium from highly active waste solutions. The flow-sheets are verified by demonstration processes, in centrifugal contactors, using synthetic or genuine fuel solutions. The feasibility of the processes is also discussed.

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Section: An(iii) + Ln(iii) Co-extraction Using Todga-based Solventssupporting

confidence: 85%

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

et al. 2012

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“…4.5. 10a The faster rates of extraction by BTPhen 9 mean that the use of a phase-transfer agent such as N, N'-dimethyl-N,N'-dioctyl-2-(2-hexoxyethyl) malondiamide (DMDOHEMA), 34 which is needed to improve the extraction kinetics of BTBP 1, 10 is not necessary. Furthermore, as D Am is greater than 10 even after 5 minutes of contact, an efficient extraction can still take place using shorter contact times if desired.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Separation of Actinides from Lanthanides by a Phenanthroline-Derived Bis-triazine Ligand

et al. 2011

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Abstract. The synthesis, lanthanide complexation and solvent extraction of actinide(III) and lanthanide(III) radiotracers from nitric acid solutions by a phenanthroline-derived quadridentate bis-2 triazine ligand is described. The ligand separates Am(III) and Cm(III) from the lanthanides with remarkably high efficiency, high selectivity and fast extraction kinetics compared to its 2,2'-bipyridine counterpart. Structures of the 1:2 bis complexes of the ligand with Eu(III) and Yb(III) were elucidated by X-ray crystallography and force field calculations, respectively. The Eu(III) bis-complex is the first 1:2 bis-complex of a quadridentate bis-triazine ligand to be characterized by crystallography. The faster rates of extraction were verified by kinetics measurements using the rotating membrane cell technique in several diluents. The improved kinetics of metal ion extraction are related to the higher surface activity of the ligand at the phase interface. The improvement in the ligands properties on replacing the bipyridine unit with a phenanthroline unit far exceeds what was anticipated based on ligand design alone.

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“…This decrease at higher nitric acid 85 concentrations is due to the inability of 2-bromohexanoic acid to dissociate and form a more lipophilic complex with the Am(CyMe 4 -BTTP) 3+ cation. Employing N,N'-dimethyl-N,N'-dioctyl-2-(2-hexoxyethyl) malondiamide (DMDOHEMA) [7][8]23 as a phase-modifier did not lead to any significant 90 improvement. (Figure 5).…”

Section: Solvent Extraction Studiesmentioning

confidence: 99%

Interaction of 6,6′′-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-2,2′:6′,2′′-terpyridine (CyMe4-BTTP) with some trivalent ions such as lanthanide(iii) ions and americium(iii)

et al. 2010

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Recovery of minor actinides from HLLW using the DIAMEX process

Cited by 137 publications

References 3 publications

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

A review of the demonstration of innovative solvent extraction processes for the recovery of trivalent minor actinides from PUREX raffinate

Highly Efficient Separation of Actinides from Lanthanides by a Phenanthroline-Derived Bis-triazine Ligand

Interaction of 6,6′′-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-2,2′:6′,2′′-terpyridine (CyMe4-BTTP) with some trivalent ions such as lanthanide(iii) ions and americium(iii)

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