UCl3 synthesis in molten LiCl–KCl and NaCl–MgCl2 via galvanically coupled uranium oxidation and FeCl2 reduction

Open circuit potential (OCP) measurements were made to determine uranium chloride (UClx) species activity in NaCl–MgCl2, which is a candidate salt for use in a molten salt reactor fuel. The operating temperature ranged from 500 to 650 °C, and the measurement system used a U-Zr working electrode (WE) and Ag/AgCl reference electrode (RE). The activity was calculated to range from 2.52×10−6 to 2.99×10−8 (with uncertainties of ±1.0×10−7 and ±1.1×10−9, respectively), dependent upon the temperature and concentration of UCl3 (ranging from 0.25 to 11.55 wt.%). Fit of the OCP data to the Nernst equation resulted in values of 3.1 to 4.8 electrons transferred per U atom. This indicates the possibility for codeposition of Mg2+ and U3+ under certain conditions. Scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photo-electron spectroscopy analyses of cathodic deposits confirm the presence of metallic magnesium.

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UCl3 synthesis in molten LiCl–KCl and NaCl–MgCl2 via galvanically coupled uranium oxidation and FeCl2 reduction

Cited by 3 publications

References 15 publications

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