International Conference on Fast Reactors and Related Fuel Cycles: Next Generation Nuclear Systems for Sustainable Development (FR17)

The UO2– MeO2 (Me = Th, Pu, Zr) cathode crystalline deposits formation during the melts electrolysis.

27 Jun 2017, 17:30

1h 30m

Poster Area (Yekaterinburg)

POSTER Track 5. Fast Reactor Materials (Fuels and Structures) and Technology Poster Session 1

Speaker

Dr Vladimir Krotov (Institute of High-Temperature Electrochemistry UB RAS)

Description

The cathode crystalline UO2–ThO2 (30-50 mol/ %), UO2-PuO2 (6, 42 and 72 mol. %), UO2-ZrO2 (0.1 – 98 mol. %) deposits, were formed. The electrolyte - melt: (NaCl-KCl)-UO2Cl2-MeCl4, where MeCl4 = ThCl4, PuCl4, ZrCl4. The influence of the MeCl4 concentration in the (NaCl–KCl)–UO2Cl2–MeCl4 melt, the initial electrolysis current density, the temperature, and the electrolysis duration on the average MeO2 concentration in the UO2– MeO2 deposits was studied. The MeO2 fraction in the cathode UO2– MeO2 deposits regularly decreased as the MeCl4 concentration decreased and the current density and electrolysis duration increased. The electrolytic of UO2– MeO2 cathode crystalline deposit are formed through simultaneous electrolytic reduction of UO22+ ions to UO2 and the exchange between the UO2 and Me4+ ions present in the molten (NaCl-KCl)-UO2Cl2-MeCl4 electrolyte.

Country/Int. Organization

Russia/Institute of High-Temperature Electrochemistry UB RAS

Presentation materials

Paper

IAEA-CN-245-379_.docx