Demonstration of a TODGA based Extraction Process for the Partitioning of Minor Actinides from a PUREX Raffinate

Magnusson, Daniel; Christiansen, Birgit; Glatz, Jean‐Paul; Malmbeck, Rikard; Modolo, Giuseppe; Serrano‐Purroy, Daniel; Sorel, C.

doi:10.1080/07366290802544726

Cited by 181 publications

(94 citation statements)

References 8 publications

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“…5) [30]. Very high feed decontamination factors were obtained for Am and Cm (DF ∼ 40 000) and the recovery of these elements was higher than 99.99%.…”

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

confidence: 82%

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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“…5) [30]. Very high feed decontamination factors were obtained for Am and Cm (DF ∼ 40 000) and the recovery of these elements was higher than 99.99%.…”

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

confidence: 82%

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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“…The presence of ether oxygen between the two amide groups in the DGA increases the extraction of lower actinides due to the active education of tridentate complexes. N,N,N',N'-Tetraoctyldiglycolamide (TODGA) 44g and N,N,N',N'-Tetra-2-ethylhexyldiglycolamide (TEH-DGA) 44j [32,33] were considered as the most promising extractants for the lower actinides among diglycolamides. It is due to the influence of the nature of the alkyl substituents of diglycolamide.…”

Section: Diglycolamides Are Extractants For Separation Of Actinides Amentioning

confidence: 99%

“…Присутст-вие эфирного кислорода между двумя амидными группами в DGA повы-шает извлечение низших актиноидов вследствие активного образования тридентантных комплексов. Как наи-более перспективные экстрагенты для низших актинидов среди дигликольа-мидов рассматриваются N,N,N',N'-тетраоктилдигликольамид (ТОДГА) 44ж и N,N,N',N'-тетра-2-этилгексил-дигликольамид (ТЭГДГА) 44к [32,33].…”

Section: дигликольамиды -экстрагенты для разделения актиноидов и лантunclassified

Extractants for rare earth metals

2016

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The separation of trivalent rare earth metals is perhaps the most serious challenge associated with a closed fuel cycle. The choice of ligand as extractant, which must be selective and efficient in conditions of high radiation environment, plays an important role. In this review there are the main examples of extractants for f-elements used in the present 10-20 years. Экстрагенты для редкоземельных металловРазделение трехвалентных редкоземельных металлов, возможно, является самым се-рьезным вызовом, связанным с замкнутым топливным циклом. Важную роль играет выбор лиганда в качестве экстрагента, который должен быть селективным и надежным в условиях повышенной радиации среды. В данном обзоре приведены основные примеры экстрагентов для f-элементов, применяющихся в последнии 10-20 лет.Ключевые слова: редкоземельные металлы; фосфорорганические соединения; краунэ-фиры; поданды; каликсарены; амиды дигликолевой кислоты.

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“…N,N-dimethyl-N,N-dioctylhexylethoxymalonamide (DMDOHEMA) has become the reference molecule for the DIAMEX processs [13,14] enhancing the extractive properties towards trivalent elements and shortening the degradation compounds formed by acidic hydrolysis and radiolysis [15]. Recently, a new process for recovery of trivalent actinides from PUREX-type raffinate utilizing N,N,N,N--tetraoctyldiglycolamide (TODGA) was developed [16][17][18][19][20][21][22]. In a fi rst step a very effi cient extraction of An(III) and Ln(III) from acidic medium is performed, followed by their stripping using diluted nitric acid [19].…”

Section: Reprocessability Of Molybdenum and Magnesia Based Inert Matrmentioning

confidence: 99%

Reprocessability of molybdenum and magnesia based inert matrix fuels

et al. 2015

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Abstract. This work focuses on the reprocessability of metallic 92 Mo and ceramic MgO, which is under investigation for (Pu,MA)-oxide (MA = minor actinide) fuel within a metallic 92 Mo matrix (CERMET) and a ceramic MgO matrix (CERCER). Magnesium oxide and molybdenum reference samples have been fabricated by powder metallurgy. The dissolution of the matrices was studied as a function of HNO 3 concentration (1-7 mol/L) and temperature (25-90°C). The rate of dissolution of magnesium oxide and metallic molybdenum increased with temperature. While the MgO rate was independent of the acid concentration (1-7 mol/L), the rate of dissolution of Mo increased with acid concentration. However, the dissolution of Mo at high temperatures and nitric acid concentrations was accompanied by precipitation of MoO 3 . The extraction of uranium, americium, and europium in the presence of macro amounts of Mo and Mg was studied by three different extraction agents: tri-n-butylphosphate (TBP), N, N-dimethyl-N,N-dioctylhexylethoxymalonamide (DMDOHEMA), and N,N,N',N'--tetraoctyldiglycolamide (TODGA). With TBP no extraction of Mo and Mg occurred. Both matrix materials are partly extracted by DMDOHEMA. Magnesium is not extracted by TODGA (D < 0.1), but a weak extraction of Mo is observed at low Mo concentration.

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Demonstration of a TODGA based Extraction Process for the Partitioning of Minor Actinides from a PUREX Raffinate

Cited by 181 publications

References 8 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

Extractants for rare earth metals

Reprocessability of molybdenum and magnesia based inert matrix fuels

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