Continuous extraction and separation of Am(III) and Cm(III) using a highly practical diamide amine extractant

Suzuki, H.; Tsubata, Yasuhiro; Kurosawa, Tatsuya; Sagawa, Hiroaki; Matsumura, Tatsuro

doi:10.1080/00223131.2017.1299050

Cited by 31 publications

(12 citation statements)

References 16 publications

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“…[30] The feasibility of the Am(III)/Cm(III) separation was demonstrated on a counter-current mixer settler test, which allowed the recovery of 99.8 % Am(III) with only 9.6 % of Cm(III) impurity in the product. [31] The solvent composed of 0.25 mol L -1 ADAAM(EH) and the feed contained 1.5 mol L -1 HNO3 spiked with Am(III) and Cm(III) without the use of the aqueous complexant, TEDGA.…”

Section: Introductionmentioning

confidence: 99%

Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe₄BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid

Zsabka

Hecke

Wilden

et al. 2020

Solvent Extraction and Ion Exchange

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The feasibility of separating americium from curium and the lanthanides was studied in batch solvent extraction experiments using an organic solvent composed of 0.01 mol L -1 2,9bis (5,5,8,8- tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-1,10-phenanthroline (CyMe4BTPhen) in the ionic liquid Aliquat-336 nitrate [A336][NO3] from feed solutions containing N,N,N',N'-tetraethyl diglycolamide (TEDGA), stable lanthanide ions and tracers of 241 Am, 244 Cm and 152 Eu. The combined use of a lipophilic and a hydrophilic ligand with opposite selectivity for Am(III) vs. Cm(III) and Ln(III) allowed the separation of Am(III) from Cm(III) and Ln(III) from moderate acidic feed solutions (1 mol L -1 HNO3, SFAm/Cm = 3.1 -3.9, SFAm/La > 75, SFAm/Eu ≥ 3000).

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Section: Introductionmentioning

confidence: 99%

Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe₄BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid

Zsabka

Hecke

Wilden

et al. 2020

Solvent Extraction and Ion Exchange

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“…The composition of the loaded MA nuclides was based on the composition of fuel discharged from the fast breeder reactor, as shown in Table 2, and the composition of fuel discharged from a light water reactor was also studied as a reference. 244 Cm was excluded from the loaded MA nuclides because it has a short half-life of 18.1 years and Cm element can be separated from MA 43 . Since the MA composition of the fuel discharged from the fast breeder reactor changes due to transition from Pu, Am nuclides increase.…”

Section: Resultsmentioning

confidence: 99%

Concept of a Fast Breeder Reactor To Transmute MA and LLFP

Wakabayashi

2021

Preprint

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The long-term issues of nuclear power systems are the effective use of uranium resources and the reduction of radioactive waste. Important radioactive wastes are minor actinides (MA: 237 Np, 241 Am, 243 Am, etc.) and long-lived fission products (LLFP: 129 I, 99 Tc, 79 Se, etc.). The purpose of this study was to show a system that can simultaneously achieve the breeding of fissile materials and the transmutation of MA and LLFP in one fast reactor. Transmutation was carried out by loading innovative Duplex type MA fuel in the core region and LLFP containing moderator in the first layer of the radial blanket. Breeding was achieved in the core and axial blanket. As a result, it was clarified that in this fast breeder reactor, a breeding ratio of about 1.1 was obtained, and MA and LLFP achieved a support ratio of 1 or more. The transmutation rate was 10.3%/y for 237 Np, 14.1%/y for 241 Am, 9.9%/y for 243 Am, 1.6%/y for 129 I, 0.75%/y for 99 Tc, and 4%/y for 79 Se. By simultaneously breeding fissile materials and transmuting MA and LLFP in one fast reactor, it will be possible to solve the long-term issues of the nuclear power reactor system, such as securing nuclear fuel resources and reducing radioactive waste.

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“…Since most lanthanides and Cm are not oxidized, the hexavalent Am can then be separated in analogy with U(VI) and/or Pu(IV)/Pu(VI) using the same extractants developed for U/Pu recovery [10]. The standard potential for the Am(III)/Am(VI) redox couple under acidic conditions is about 1.7 V, and thus strong oxidizing agents are required [1,11]. Several oxidants have been explored including peroxydisulfate [12,13], copper(III) periodate [14,15], electrochemical techniques [16], and sodium bismuthate [5][6][7][8]17].…”

Section: Theorymentioning

confidence: 99%

“…Partitioning and transmutation of t he americium is desirable to minimize the long-term h eat load of m aterial interred in a future high-level waste repository. Separation of c urium from americium i s also desirable to reduce heat generation during minor actinide fuel fabrication [1].…”

Section: Introductionmentioning

confidence: 99%

Oxidation and extraction of Am(VI) using a monoamidic extractant in 3D printed centrifugal contactors

Law

Mincher

Tillotson

et al. 2018

J Radioanal Nucl Chem

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A series of tests were performed using centrifugal contactors to evaluate the separation of Am(VI) from cerium, as well as to determine the efficiency of the contactors. All experiments were performed using 2-cm, acrylic 3D-printed centrifugal contactors.Solvent extraction tests were performed using 1 M N,N-di(2-ethylhexyl)butyramide (DEHBA)/dodecane and a nitric acid feed solution spiked with 243 Am and 139 Ce and oxidized with 60 mg mL -1 sodium bismuthate. Approximately 72 % of the Am was extracted with a single contactor stage. Co-stripping of Am and Ce was demonstrated but attempts at selective stripping were not successful. Successful recycle of the used organic phase was demonstrated. Contactor efficiencies of 95 % to 100 % were obtained.

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Continuous extraction and separation of Am(III) and Cm(III) using a highly practical diamide amine extractant

Cited by 31 publications

References 16 publications

Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe₄BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid

Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe₄BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid

Concept of a Fast Breeder Reactor To Transmute MA and LLFP

Oxidation and extraction of Am(VI) using a monoamidic extractant in 3D printed centrifugal contactors

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Continuous extraction and separation of Am(III) and Cm(III) using a highly practical diamide amine extractant

Cited by 31 publications

References 16 publications

Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe4BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid

Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe4BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid

Concept of a Fast Breeder Reactor To Transmute MA and LLFP

Oxidation and extraction of Am(VI) using a monoamidic extractant in 3D printed centrifugal contactors

Contact Info

Product

Resources

About

Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe₄BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid

Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe₄BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid