Development and demonstration of innovative partitioning processes (i-SANEX and 1-cycle SANEX) for actinide partitioning

Modolo, Giuseppe; Wilden, Andreas; Kaufholz, Peter; Bosbach, Dirk; Geist, Andreas

doi:10.1016/j.pnucene.2013.07.021

Cited by 59 publications

(40 citation statements)

References 28 publications

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“…Within the last Framework Programs (from FP3 to FP7), the European Commission funded joint research projects to develop safe, compact and simplified separation strategies [8,12,13]. A promising process, named innovative-Selective ActiNide EXtraction (i-SANEX), based on two extraction cycles was proposed for the direct trivalent MA recovery from the Plutonium and URanium EXtraction (PUREX) raffinate [14][15][16]. In the first step, a lipophilic extractant is employed to extract MA and Ln from an acidic aqueous feed containing also other fission and corrosion products.…”

Section: Introductionmentioning

confidence: 99%

Radiolytic degradation of hydrophilic PyTri ligands for minor actinide recycling

Mossini

Macerata

Panzeri

et al. 2019

J Radioanal Nucl Chem

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The 2,6-bis[1H-1,2,3-triazol-4-yl]-pyridine (PyTri) chelating unit has already shown promising properties for application to advanced hydrometallurgical processes aimed at recovering minor actinides from highly active raffinate. Radiolytic stability is an undeniable key requirement for chemicals involved in highly radioactive solutions partitioning, since radiolysis can have a huge impact on system safety and performances. In this work, the radiolytic degradation of two hydrophilic PyTri complexing agents was investigated by different analytical techniques. The radiation damage was delivered by a 60 Co source. The main radiation-induced ligand degradation by-products were hypothesized. Unprecedented PyTri ligands radiolytic stability was proved, further recommending their implementation in future partitioning processes.

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Section: Introductionmentioning

confidence: 99%

Radiolytic degradation of hydrophilic PyTri ligands for minor actinide recycling

Mossini

Macerata

Panzeri

et al. 2019

J Radioanal Nucl Chem

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“…Several promising hydrophilic complexants have been developed although they do not fully match all requirements [36]. The sulfophenyl-BTP (2,6bis(5,6-di(sulfophenyl)-1,2,4-triazin-3-yl)pyridine, SO 3 -Ph-BTP) [37] molecule has been studied under the perspective of fundamental properties [38] as well as for process development in single and multi-stage centrifugal contactor batteries [39,40,41]. Its main disadvantage is the presence of sulfophenyl groups that hinder complete decomposition to gaseous products.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Single-Stage Centrifugal Contactor Experiments with the Novel Hydrophilic Complexant PyTri-Diol for the i-SANEX Process

Mossini

Macerata

Wilden

et al. 2018

Solvent Extraction and Ion Exchange

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The applicability of 2,6-bis[1-(propan-1-ol)-1,2,3-triazol-4-yl)]pyridine (PyTri-Diol) in i-SANEX process as water-soluble complexing agent was studied. Preliminary batch experiments were aimed at identifying the optimal formulation of the PyTri-Diol solution and at preparing the ground for single-stage centrifugal contactor experiments. A TODGA-based solvent loaded using a spiked synthetic PUREX raffinate and the optimized PyTri-Diol aqueous phase were contacted in a single-stage annular centrifugal contactor setup with three different flow-rate conditions. No hydrodynamic problems were encountered and promising minor actinides separation from other cations was achieved with satisfactory kinetics and stage efficiency. The flow-sheet of a TODGA-PyTri-Diol based i-SANEX process was designed exploiting batch and single-stage data, promoting the CHON compliant PyTri-Diol as excellent alternative to the formerly used SO 3-Ph-BTP.

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“…The separation ( partitioning) of these transuranium elements (TRU) and their conversion into shorter lived or stable nuclides in a new generation of nuclear reactors using fast neutron induced fission (transmutation) results in a decrease of the long-term radiotoxicity and long-term heat load of the highly radioactive waste (HLW) to be disposed of in a geological repository. [6][7][8][9][10] A crucial part of hydrometallurgical partitioning processes is the separation of the trivalent actinides (Am(III) and Cm(III)) from trivalent lanthanides. 1 This concept is called the partitioning and transmutation strategy (P&T), 2-5 the possible impact of which is discussed in ref.…”

Section: Introductionmentioning

confidence: 99%

TRLFS study on the complexation of Cm(iii) and Eu(iii) with SO₃-Ph-BTBP

et al. 2015

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The complexation of Cm(iii) and Eu(iii) with a water soluble BTBP (sodium 3,3',3'',3'''-([2,2'-bipyridine]-6,6'-diylbis(1,2,4-triazine-3,5,6-triyl))tetrabenzenesulfonate, SO3-Ph-BTBP) is studied using time resolved laser fluorescence spectroscopy. For the complexation of Cm(iii) the influence of the medium (10(-3) M HClO4→ 0.5 M HNO3) is investigated in detail revealing important impacts of the applied medium (pH, ionic strength, anions) on the speciation and conditional stability constants. SO3-Ph-BTBP forms 1 : 2 complexes with Cm(iii) and Eu(iii). The conditional stability constants of [Cm(SO3-Ph-BTBP)2](5-) and [Eu(SO3-Ph-BTBP)2](5-) in 0.5 M HNO3 are determined to be log β02 = 7.3 ± 0.3 and log β02 = 5.4 ± 0.5, respectively. The difference of 1.9 orders of magnitude is in line with hydrophobic BT(B)P type ligands and shows that the selectivity is not affected by tuning the hydrophilicity using SO3-Ph-side chains.

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Development and demonstration of innovative partitioning processes (i-SANEX and 1-cycle SANEX) for actinide partitioning

Cited by 59 publications

References 28 publications

Radiolytic degradation of hydrophilic PyTri ligands for minor actinide recycling

Radiolytic degradation of hydrophilic PyTri ligands for minor actinide recycling

Optimization and Single-Stage Centrifugal Contactor Experiments with the Novel Hydrophilic Complexant PyTri-Diol for the i-SANEX Process

TRLFS study on the complexation of Cm(iii) and Eu(iii) with SO₃-Ph-BTBP

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Development and demonstration of innovative partitioning processes (i-SANEX and 1-cycle SANEX) for actinide partitioning

Cited by 59 publications

References 28 publications

Radiolytic degradation of hydrophilic PyTri ligands for minor actinide recycling

Radiolytic degradation of hydrophilic PyTri ligands for minor actinide recycling

Optimization and Single-Stage Centrifugal Contactor Experiments with the Novel Hydrophilic Complexant PyTri-Diol for the i-SANEX Process

TRLFS study on the complexation of Cm(iii) and Eu(iii) with SO3-Ph-BTBP

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TRLFS study on the complexation of Cm(iii) and Eu(iii) with SO₃-Ph-BTBP