About: Electrochemical separation of uranium in the molten system LiF-NaF-KF-UF4

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About: Electrochemical separation of uranium in the molten system LiF-NaF-KF-UF4 Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	This article is focused on the electrochemical investigation (cyclic voltammetry and related studies) of possible reduction of U4+ to metal uranium in the molten system LiF-NaF-KF(eut.)-UF4 that can provide basis for the electrochemical extraction of uranium from molten salts. Two-step reduction mechanism for U4+ ions involving one electron exchange in soluble/soluble U4+/U3+ system and three electrons exchange in the second step were found on the nickel working electrode. Both steps were found to be reversible and diffusion controlled. Based on cyclic voltammetry, the diffusion coefficients of uranium ions at 530 degrees C were found to be D(U4+) = 1.64 x 10(-5) cm(2) s(-1) D(U3+) 1.76 x 10(-5) cm(2) s(-1). Usage of the nickel spiral electrode for electrorefining of uranium showed fairly good feasibility of its extraction. However some oxidant present during the process of electrorefining caused that the solid deposits contained different uranium species such as UF3, UO2 and K3UO2F3. This article is focused on the electrochemical investigation (cyclic voltammetry and related studies) of possible reduction of U4+ to metal uranium in the molten system LiF-NaF-KF(eut.)-UF4 that can provide basis for the electrochemical extraction of uranium from molten salts. Two-step reduction mechanism for U4+ ions involving one electron exchange in soluble/soluble U4+/U3+ system and three electrons exchange in the second step were found on the nickel working electrode. Both steps were found to be reversible and diffusion controlled. Based on cyclic voltammetry, the diffusion coefficients of uranium ions at 530 degrees C were found to be D(U4+) = 1.64 x 10(-5) cm(2) s(-1) D(U3+) 1.76 x 10(-5) cm(2) s(-1). Usage of the nickel spiral electrode for electrorefining of uranium showed fairly good feasibility of its extraction. However some oxidant present during the process of electrorefining caused that the solid deposits contained different uranium species such as UF3, UO2 and K3UO2F3. (en)
Title	Electrochemical separation of uranium in the molten system LiF-NaF-KF-UF4 Electrochemical separation of uranium in the molten system LiF-NaF-KF-UF4 (en)
skos:prefLabel	Electrochemical separation of uranium in the molten system LiF-NaF-KF-UF4 Electrochemical separation of uranium in the molten system LiF-NaF-KF-UF4 (en)
skos:notation	RIV/46356088:_____/13:#0001364!RIV14-MPO-46356088
http://linked.open...avai/predkladatel	ÚJV Řež, a. s.
http://linked.open...avai/riv/aktivita	R
http://linked.open...avai/riv/aktivity	R
http://linked.open...iv/cisloPeriodika	1-3
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Szatmary, Lorant Straka, Martin Korenko, Michal Uhlíř, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	ÚJV Řež, a. s.
http://linked.open...dnocenehoVysledku	72364
http://linked.open...ai/riv/idVysledku	RIV/46356088:_____/13:#0001364
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	KCL eutectic melt; Thermodynamic properties; transient techniques; alloy fuel; chlorides; electrode; ions (en)
http://linked.open.../riv/klicoveSlovo	KCL eutectic melt alloy fuel transient techniques ions electrode chlorides Thermodynamic properties
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[DFD382436DE4]
http://linked.open...i/riv/nazevZdroje	Journal of Nuclear Materials
http://linked.open...in/vavai/riv/obor	DL
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	440
http://linked.open...iv/tvurceVysledku	Straka, Martin Szatmáry, Lórant Uhlíř, Jan Korenko, Michal
http://linked.open...ain/vavai/riv/wos	000323396600043
issn	0022-3115
number of pages	6 (xsd:int)

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