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290 results on '"Babain, V. A."'

51. Extraction of Actinides with Tributyl Phosphate in Carbonates of Fluorinated Alcohols.

Author

Babain, V., Alyapyshev, M., Voronaev, I., Tkachenko, L., and Kenf, E.

Subjects
*TRIBUTYL phosphate, *ACTINIDE elements, *NUCLEAR fuels, *BOILING-points, *SPENT reactor fuels, *CARBONATES, *CARBONATE minerals
Abstract

New non-inflammable compounds – carbonates of fluorinated alcohols were proposed as potential diluents for tributyl phosphate (TBP). These compounds are commercially available, have high boiling point, high density, and low solubility in water solutions. Extraction of actinides from nitric acid by TBP solutions in fluorinated carbonates was studied. TBP solutions in fluorinated carbonates show lower extraction ability comparing with TBP solutions in hydrocarbon diluents. In spite of this, it is possible to extract more than 99.9% of tetra- and hexavalent actinides presented in spent nuclear fuel solutions. The advantage of proposed solvent is possibility to obtain uranium strip product with uranium concentration higher than 100 g/l. [ABSTRACT FROM AUTHOR]

Published
2021
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52. A CVD Process for Producing Atomic Current Sources Based on 63Ni

Author

Kharitonov, I. D., primary, Mazgunova, V. A., additional, Babain, V. A., additional, Kostylev, A. I., additional, Merkushkin, A. O., additional, Shemukhin, A. A., additional, Balakshin, Yu. V., additional, Kozhemyako, A. V., additional, Kalmykov, S. N., additional, and Magomedbekov, E. P., additional

Published
2018
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55. A novel highly selective ligand for separation of actinides and lanthanides in the nuclear fuel cycle. Experimental verification of the theoretical prediction

Author

Lavrov, H. V., primary, Ustynyuk, N. A., additional, Matveev, P. I., additional, Gloriozov, I. P., additional, Zhokhov, S. S., additional, Alyapyshev, M. Yu., additional, Tkachenko, L. I., additional, Voronaev, I. G., additional, Babain, V. A., additional, Kalmykov, S. N., additional, and Ustynyuk, Yu. A., additional

Published
2017
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56. MCR-ALS study of actinides reduction in spent nuclear fuel reprocessing

Author

Kirsanov, D., Babain, V., Lupov, A., Agafonova, M., Ruckebusch, C., Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL)

Subjects
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry
Published
2014

61. A CVD Process for Producing Atomic Current Sources Based on 63Ni.

Author

Kharitonov, I. D., Mazgunova, V. A., Babain, V. A., Kostylev, A. I., Merkushkin, A. O., Shemukhin, A. A., Balakshin, Yu. V., Kozhemyako, A. V., Kalmykov, S. N., and Magomedbekov, E. P.

Subjects
NUCLEAR batteries, SEMICONDUCTORS, CHEMICAL vapor deposition, NICKEL, METAL coating, PHOSPHINE
Abstract

A CVD process was developed for producing 63Ni-based atomic batteries by deposition of active 63Ni layers onto semiconductor silicon supports. Tetrakis(trifluorophosphine)nickel synthesized from 63Ni metal and phosphorus trifluoride was used as the volatile precursor. The influence of the support temperature and working pressure on the characteristics of the 63Ni coating was examined. [ABSTRACT FROM AUTHOR]

Published
2018
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63. N,N′-Dialkyl-N,N′-diaryl-1,10-phenanthroline-2,9-dicarboxamides as donor ligands for separation of rare earth elements with a high and unusual selectivity. DFT computational and experimental studies

Author

Ustynyuk, Yu. A., primary, Borisova, N. E., additional, Babain, V. A., additional, Gloriozov, I. P., additional, Manuilov, A. Y., additional, Kalmykov, S. N., additional, Alyapyshev, M. Yu., additional, Tkachenko, L. I., additional, Kenf, E. V., additional, and Ustynyuk, N. A., additional

Published
2015
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89. Determination of Tc in aqueous solutions of various cationic compositions using a varian 725-ES inductively coupled plasma optical emission spectrometer.

Author

Sapozhnikova, N., Naumova, Yu., Egorova, O., Lumpov, A., and Babain, V.

Subjects
AQUEOUS solutions, INDUCTIVELY coupled plasma mass spectrometry, TECHNETIUM isotopes, GRAVIMETRIC analysis, NUCLEAR fuels, SEPARATION (Technology), SOLUTION (Chemistry)
Abstract

A procedure was developed for determining the gravimetric concentration of Tc in aqueous solutions from spent nuclear fuel reprocessing without their preliminary separation, using an inductively coupled plasma optical emission spectrometer (ICP-OES). The optimal conditions for minimizing spectral and matrix interferences were determined. They allowed the lower limit of Tc determination in process salt solutions to be decreased from 1 to 0.25 mg l. [ABSTRACT FROM AUTHOR]

Published
2012
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90. Solvent extraction of calcium and strontium into nitrobenzene by using a synergistic mixture of hydrogen dicarbollylcobaltate and N, N, N′, N′-tetraisobutyl-2,6-dipicolinamide.

Author

Makrlík, E., Vaňura, P., Selucký, P., Babain, V., and Smirnov, I.

Subjects
EXTRACTION (Chemistry), SOLVENTS, STRONTIUM isotopes, NITROBENZENE, MIXTURES, CHEMICAL equilibrium, AMIDES, COBALT compounds
Abstract

Extraction of microamounts of calcium and strontium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (HB) in the presence of N, N, N′, N′-tetraisobutyl-2,6-dipicolinamide [T(iBu)DPA, L] has been investigated. The equilibrium data have been explained assuming that the species HL, HL, CaL, SrL and SrL are extracted into the organic phase. The values of extraction and stability constants of the cationic complexes in nitrobenzene saturated with water have been determined. [ABSTRACT FROM AUTHOR]

Published
2011
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92. Extraction of europium and americium into phenyltrifluoromethyl sulfone by using hydrogen dicarbollylcobaltate in the presence of N, N′-diethyl- N, N′-diphenyl-2,6-dipicolinamide.

Author

Makrlík, E., Vaňura, P., Selucký, P., Babain, V. A., and Smirnov, I. V.

Subjects
EUROPIUM, AMERICIUM, EXTRACTION (Chemistry), MATHEMATICAL complexes, CATIONS
Abstract

Extraction of microamounts of europium and americium by a phenyltrifluoromethyl sulfone (FS 13) solution of hydrogen dicarbollylcobaltate (H+B−) in the presence of N, N′-diethyl- N, N′-diphenyl-2,6-dipicolinamide (EtPhDPA, L) has been investigated. The equilibrium data have been explained assuming that the species HL+, HL2 +, ML2 3+, ML3 3+ and ML4 3+ (M3+ = Eu3+, Am3+) are extracted into the organic phase. The values of extraction and stability constants of the cationic complexes in FS 13 saturated with water have been determined. It was found that the stability constants of the corresponding complexes EuL and AmL, where n = 2, 3, 4 and L is EtPhDPA, in water-saturated FS 13 are comparable. [ABSTRACT FROM AUTHOR]

Published
2010
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93. Complexation of polyethylene glycol with Sr2+ and Ba2+ cations in extracts containing chlorinated cobalt dicarbollide.

Author

Stoyanov, E., Smirnov, I., Babain, V., Antonov, N., Peterman, D., Herbst, R., Todd, T., and Luther, T.

Subjects
POLYETHYLENE glycol, ETHYLENE dichloride, ELECTROLYSIS, ATOMS, COBALT, METAL ions, PHOTOSYNTHETIC oxygen evolution
Abstract

The composition and structure of complexes that are formed in the system consisting of chlorinated cobalt dicarbollide (CCD), polyethylene glycol (PEG), and Sr2+ or Ba2+ in a polar diluent, dichloroethane or phenyl trifluoromethyl sulfone, were studied by IR and NMR spectroscopy. In extraction of Sr2+ and Ba2+ with solutions of [H5O·PEG]CCD-, the organic phase contains the ionic associates [M2+·PEG]CCD. The Sr2+ and Ba2+ complexes have similar composition and structure: The oxygen atoms of two OH groups and six COC groups of a PEG molecule fill the first coordination sphere of the metal ions. Also, no more than two water molecules can be coordinated in the second sphere, forming hydrogen bonds with the hydrogen atoms of two OH groups of PEG. The coordination of the OH groups of PEG with the Sr2+ and Ba2+ ions is preferable over the coordination of the COC groups, as follows from the fact that the extraction of Sr2+ and Ba2+ with CCD-PEG mixtures gets worse on replacement of the OH groups of PEG by other substituents. A considerable increase in the efficiency of Sr2+ and Ba2+ extraction with H-CCD solutions in the presence of PEG is due to the fact that all the H2O molecules in the first coordination spheres of the M2+ ions are replaced by the COC and OH groups of PEG with the formation of a hydrophobic complex [M2+·PEG](H2O)2. [ABSTRACT FROM AUTHOR]

Published
2004
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94. Approach to on-line monitoring of PUREX process using chemometric processing of the optical spectral data

Author

Kirsanov, Dmitry O., Babain, V., Agafonova-Moroz, M., Lumpov, A., and Legin, A.

Abstract

AbstractOptical spectroscopic measurements in the UV-Vis and IR ranges were performed in model solutions of aqueous and organic phases of the PUREX process for spent nuclear fuel (SNF) reprocessing. Chemometric processing of the spectral data with PLS (partial least squares) regression allowed simultaneous quantification of several key components (uranium, neptunium, plutonium, nitric acid) in these mixtures in an effective and elegant way. The content of all key components was quantitively determined with mean relative errors not exceeding 10%. It was shown that the employment of the whole spectra or their certain continuous regions for a PLS calibration enables to decrease the analytical errors compared to the use of a single wavelength in an ordinary least squares approach. The results of this research imply that the development of on-line techniques for SNF reprocessing monitoring is fully possible and can be based on optical spectroscopy methods combined with multivariate data processing techniques.

Published
2013
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95. Combination of optical spectroscopy and chemometric techniques—a possible way for on-line monitoring of spent nuclear fuel (SNF) reprocessing

Author

Kirsanov, D., Babain, V., Agafonova-Moroz, M., Lumpov, A., and Legin, A.

Abstract

AbstractUV-Vis spectroscopic measurements were performed in model mixtures simulating solutions obtained in the course of PUREX spent nuclear fuel reprocessing. Mixtures contained constant concentrations of nitric acid and uranium with varied content of neptunium and plutonium. Spectral data were processed with classical chemometric technique — PLS regression. This approach has shown significant improvement in analytical precision of actinides determination compared to standard univariate data processing. The combination of spectroscopic measurements with chemometric data processing shows good promise for the development of on-line spectroscopic techniques for SNF reprocessing monitoring.

Published
2012
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