Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) (방사성폐기물학회지)

Korean Radioactive Waste Society (한국방사성폐기물학회)
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Construction of a Rotating Disk Electrode System for Measuring Electrochemical Parameters of a Metal Ion in LiCl-KCl Melt: Electrochemical Properties of Sm3+

  • Received : 2024.04.17
  • Accepted : 2024.05.22
  • Published : 2024.09.30
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Abstract

Pyrochemical processing and molten-salt reactors have recently garnered significant attention as they are promising options for future nuclear technologies, such as those for recycling spent nuclear fuels and the next generation of nuclear reactors. Both of these technologies require the use of high-temperature molten salt. To implement these technologies, one must understand the electrochemical behavior of fission products in molten salts, lanthanides, and actinides. In this study, a rotating-disk-electrode (RDE) measurement system for high-temperature molten salts is constructed and tested by investigating the electrochemical reactions of Sm3+ in LiCl-KCl melts. The results show that the reduction of Sm3+ presents the Levich behavior in LiCl-KCl melts. Using the RDE system, not only is the diffusion-layer thickness of Sm3+ measured in high-temperature molten salts but also various electrochemical parameters for Sm3+ in LiCl-KCl melts, including the diffusion coefficient, Tafel slope, and exchange current density, are determined.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF), funded by the Ministry of Science and ICT (NRF-2017M2A8A5014716, 2021M2E1A1085202, and RS-2023-00261146) and by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Trade Industry and Energy (MOTIE) (RS-2023-0233621).

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