2017-Sustainable Industrial Processing Summit
SIPS 2017 Volume 3. Gaune-Escard Intl. Symp. / Molten Salt and Ionic Liquid
| Editors: | Kongoli F, Fehrmann R, Gadzuric S, Gong W, Seddon KR, Malyshev V, Iwata S |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2017 |
| Pages: | 151 pages |
| ISBN: | 978-1-987820-65-2 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
Conductivity Evaluation of (LiCl-KCl)eut. Based Molten Mixtures Containing Rare Earth and Uranium Chlorides
Alexei Potapov1; Alexander Salyulev1;1INSTITUTE OF HIGH TEMPERATURE ELECTROCHEMISTRY, Ekaterinburg, Russian Federation;
Type of Paper: Regular
Id Paper: 43
Topic: 13
Abstract:
At the nitride spent nuclear fuel (SNF) pyrochemical reprocessing, the SNF components are transferred into the molten LiCl - KCl eutectic and then the components of the mixture are electrochemically separated.The aim of this work is to develop the method to estimate the electrical conductivity of the LiCl-KCl based melts containing rare earth and uranium chlorides. The electrical conductivity is a non-additive property; therefore a simple summation of the conductivities gives a significantly overvalued result. For example, deviations of the electrical conductivity of the molten (LiCl-KCl)eut. + NdCl3 mixture from the additive values increase and reach ~ 80 - 90% as the NdCl3 concentration increases.
The stronger interaction in the system results in the greater deviation of its properties from the additivity. Systems composed of (LiCl-KCl)eut. and CeCl3, NdCl3, etc., are systems with strong interaction. However, if we for summation to consider binary systems such as ((LiCl-KCl)eut. + CeCl3), ((LiCl-KCl)eut. + NdCl3), ((LiCl-KCl)eut. + UCl3), then their mixtures will form a systems with a weak interaction and the additive conductivity will differ slightly from the real value. For example, to estimate the electrical conductivity of the (LiCl-KCl)eut. - 1.51%CeCl3 +
+ 2.31%NdCl3 + 2.31mol.% UCl3 system, we used data on conductivity of the ((LiCl-KCl)eut. - CeCl3), ((LiCl-KCl)eut. - NdCl3) and ((LiCl-KCl)eut. - UCl3) systems, on which we have reliable experimental data. In this case the additive conductivity, calculated by the above mentioned technique coincides with the experimentally obtained values, within experimental error (�1.5%).
In the present work different approaches to calculate the electrical conductivity of complex mixtures are considered.