Separation of long-lived radionuclides from high active nuclear waste

Madic, C.; Lecomte, M.; Baron, Pascal; Boullis, Bernard

doi:10.1016/s1631-0705(02)01370-1

Cited by 129 publications

(105 citation statements)

References 6 publications

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“…With some modifications, neptunium can also be recovered (advanced PUREX) [3][4][5]. Up to now, solvent extraction processes have been the reference technology for fuel processing at commercial scale for more than 60 years and the reasons for this are multiple.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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 acceptance by Er III of two inner sphere bonded MeOH molecules as opposed to the nitrogen atoms of the pyridine or methyl pyridine fragments of 8a is consistent with the expected electronically weak affinity of Er III for pyridine N-atom donors as well as with expected unfavorable ligand strains for either bidentate NPO or tridentate NNPO interactions. Although somewhat of a structural departure from the NO(meNO)PO ligands 5a,b and the as yet inaccessible NO(meNO) 2 PO ligands 7a,b, the results of a study of the lanthanide coordination chemistry for the more symmetrical (NO) 2 4 . Infrared spectra for the complexes, unfortunately, do not provide for assignment of reliable coordination shifts for the P=O and N-O modes since the region 1100-1300 cm -1 also contains very strong absorptions due to the triflate anion.…”

Section: Lanthanide(iii) Coordination Chemistrymentioning

confidence: 97%

“…+ }(OTf -) and {Pr[(meNO) 2 PO*)](OTf)(MeOH) 4 + }(OTf -) 2 , realized a tridentate coordination mode. Solvent extraction behaviors for Eu III and Am III in nitric acid solutions using 5a,b, 6a,b, Ph 3 PO and the parent bifunctional ligand 2-[(diphenylphosphanyl)methyl]pyridine N,P-dioxide (3a) in 1,2-dichloroethane were assessed, and 5a,b and 6a,b were found to behave more like Ph 3 PO than 3a.…”

Section: (H 2 O)mentioning

confidence: 99%

“…Crystal structure determinations for the 2:1 complexes revealed that 3a bonds in a bidentate NOPO mode, [12a] and together with three bidentate nitrate anions, ten coordinate inner sphere environwww.zaac.wiley-vch.de ments are generated. The structure for a 4:1 complex, [Tb(3a) 4 ](NO 3 ) 3 ·(H 2 O)·(EtOH), showed an eight coordinate inner sphere geometry produced by the oxygen atoms from four neutral, bidentate 3a ligands.…”

Section: Computational Assessment Of the Chelation Properties Of 5 Andmentioning

confidence: 99%

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Synthesis and Properties of New (Phosphinoylmethyl)Pyridine N‐Oxides

Pailloux

Rosario-Amorin

Chakravarty

et al. 2013

Zeitschrift anorg allge chemie

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“…In fact, many oxygen donor ligands show high extractabilities for both An 3+ and Ln 3+ even in highly concentrated acidic solution [1,[8][9][10]. Hence, to develop an effective extraction method of An 3+ from Ln 3+ , or both the An 3+ and Ln 3+ , by extraction with soft donor ligands from even relatively concentrated acidic solution, the combination of both nitrogen donors and oxygen donors has been proposed, which would allow high selectivity and high extractability.…”

mentioning

confidence: 99%