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Volkovich V.A.,Ural Federal University | Maltsev D.S.,Ural Federal University | Yamshchikov L.F.,Ural Federal University | Chukin A.V.,Ural Federal University | And 3 more authors.
Journal of Nuclear Materials | Year: 2015

Activity, activity coefficients and solubility of uranium was determined in gallium-aluminium alloys containing 1.6 (eutectic), 5 and 20 wt.% aluminium. Additionally, activity of uranium was determined in aluminium and Ga-Al alloys containing 0.014-20 wt.% Al. Experiments were performed up to 1073 K. Intermetallic compounds formed in the alloys were characterized by X-ray diffraction. Partial and excess thermodynamic functions of U in the studied alloys were calculated. © 2015 Elsevier B.V. All rights reserved. Source


Volkovich V.A.,Ural Federal University | Maltsev D.S.,Ural Federal University | Yamshchikov L.F.,Ural Federal University | Osipenko A.G.,State Scientific Center Research Institute of Atomic Reactors
Journal of Nuclear Materials | Year: 2015

Activity, activity coefficients and solubility of uranium was determined in gallium, indium and gallium-indium alloys containing 21.8 (eutectic), 40 and 70 wt.% In. Activity was measured at 573-1073 K employing the electromotive force method, and solubility between room temperature (or the alloy melting point) and 1073 K employing direct physical measurements. Activity coefficients were obtained from the difference of experimentally determined temperature dependencies of uranium activity and solubility. Intermetallic compounds formed in the respective alloys were characterized using X-ray diffraction. Partial and excess thermodynamic functions of uranium in the studied alloys were calculated. Liquidus lines in U-Ga and U-In phase diagrams from the side rich in gallium or indium are proposed. © 2015 Elsevier B.V. All rights reserved. Source


Zolotovskii I.O.,Ulyanovsk State University | Minvaliev R.N.,Ulyanovsk State University | Sementsov D.I.,State Scientific Center Research Institute of Atomic Reactors
Physics-Uspekhi | Year: 2013

Features of wave packet dynamics in linear and non-linear optical fibers are studied allowing for complex-valued dispersion parameters. It is shown that the presence of imagin-ary components in dispersion parameters affects considerably the compression behavior of a wave packet in single-element and cascaded optical fibers; causes a shift in carrier frequency, and creates frequency-modulated wave packets with a super-luminal envelope maximum. © 2013 Uspekhi Fizicheskikh Nauk, Russian Academy of Sciences. Source


Smolenski V.,RAS Institute of High Temperature Electrochemistry | Novoselova A.,RAS Institute of High Temperature Electrochemistry | Osipenko A.,State Scientific Center Research Institute of Atomic Reactors | Maershin A.,State Scientific Center Research Institute of Atomic Reactors
Electrochimica Acta | Year: 2014

This work presents the electrochemical study of lanthanum and uranium compounds in fused 3LiCl-2KCl eutectic vs. Cl-/Cl2 reference electrode in the temperature range 723-823 K on liquid gallium-indium eutectic alloy. Thermodynamics and the activity coefficients of lanthanum and uranium were studied. The separation factor of uranium from lanthanum on gallium-indium eutectic alloy was determined. © 2014 Elsevier Ltd. All rights reserved. Source


Semidotskiy I.I.,State Scientific Center Research Institute of Atomic Reactors | Kurskiy A.S.,State Scientific Center Research Institute of Atomic Reactors
Physics of Atomic Nuclei | Year: 2013

The paper describes the conditions of the ATWS type with virtually complete cessation of the feed-water flow at the operating power level of a reactor of the VK-50 type. Under these conditions, the role of spatial kinetics in the system of feedback between thermohydraulic and nuclear processes with bulk boiling of the coolant in the reactor core is clearly seen. This feature determines the specific character of experimental data obtained and the suitability of their use for verification of the associated codes used for calculating water-water reactors. © 2013 Pleiades Publishing, Ltd. Source

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