Abstract

Ba and Sr elements in spent nuclear fuels are supposed to accumulate in LiCl molten salt electrolyte by forming chlorides (i.e., BaCl2, SrCl2) during oxide reduction in pyroprocessing. An electrochemical examination was performed in a LiCl–BaCl2–SrCl2 system to identify the effect of the BaCl2 and SrCl2 on the C anode-based oxide reduction process. BaCl2 and SrCl2 dissolved in LiCl were electrochemically stable up to 5 wt% with the C anode system, suggesting that no concern for their accumulation is needed in this range in the electrochemical aspect for the process design of the oxide reduction.

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