Abstract
The electrochemical conversion of solid oxide preforms to metal by molten salt electrolysis is influenced by many parameters like duration of electrolysis, temperature, applied voltage, open porosity of the preform and mode of electrolysis. The effect of these parameters on the electro-reduction of UO2 pellets in CaCl2-48 mol% NaCl melt was studied in the temperature range 923–1173 K with graphite rod as the counter electrode. U metal formation started at the surface of the dense UO2 pellets (95% TD) and it extended towards the bulk with time. Enhanced electrochemical activity was observed during the initial phase of electrolysis with porous UO2 pellets (52% TD). The rate of deoxidation increased with increase in the electrolysis temperature from 923 K to 1023 K, but decreased on further increase to 1173 K, due to sintering of U particles on the surface of the pellet. The thickness of U metal layer increased with increase in the applied voltage from 3.1 to 3.3 V whereas no reduction of the oxide occurred at 2.8 V. The behavior of the graphite anode, in relation to the electro-reduction of the UO2 pellets under different experimental conditions, was studied by determining the mass loss of the electrode and discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
