Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Chemical Stability of Conductive Ceramic Anodes in LiCl-Li2O Molten Salt for Electrolytic Reduction in Pyroprocessing

  • Kim, Sung-Wook (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute) ;
  • Kang, Hyun Woo (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute) ;
  • Jeon, Min Ku (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute) ;
  • Lee, Sang-Kwon (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute) ;
  • Choi, Eun-Young (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute) ;
  • Park, Wooshin (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute) ;
  • Hong, Sun-Seok (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute) ;
  • Oh, Seung-Chul (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute) ;
  • Hur, Jin-Mok (Nuclear Fuel Cycle Process Development Group, Korea Atomic Energy Research Institute)
  • Received : 2016.01.28
  • Accepted : 2016.03.02
  • Published : 2016.08.25
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Abstract

Conductive ceramics are being developed to replace current Pt anodes in the electrolytic reduction of spent oxide fuels in pyroprocessing. While several conductive ceramics have shown promising electrochemical properties in small-scale experiments, their long-term stabilities have not yet been investigated. In this study, the chemical stability of conductive $La_{0.33}Sr_{0.67}MnO_3$ in $LiCl-Li_2O$ molten salt at $650^{\circ}C$ was investigated to examine its feasibility as an anode material. Dissolution of Sr at the anode surface led to structural collapse, thereby indicating that the lifetime of the $La_{0.33}Sr_{0.67}MnO_3$ anode is limited. The dissolution rate of Sr is likely to be influenced by the local environment around Sr in the perovskite framework.

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References

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