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First principles thermodynamic studies for recycling spent nuclear fuels using electrorefining with a molten salt electrolyte

Author

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  • Noh, Seunghyo
  • Kang, Joonhee
  • Kwak, Dohyun
  • Fischer, Peter
  • Han, Byungchan

Abstract

Using first principles DFT (density functional theory), we have examined the thermochemical mechanism of electrorefining spent uranium (U) from a LiCl–KCl molten salt on a tungsten (W) surface. We calculated 197 different U/W(110) surfaces to identify the most thermodynamically and electrochemically stable structures as a function of U and Cl coverages. The results indicate that local structures of the double-layer interface between the W(110) surface and the LiCl–KCl salt are the key factors governing the electrorefining performance. The results also provide important thermodynamic properties for the design of efficient recycling systems for spent nuclear fuels, such as pyroprocessing technologies, and may be applicable as well to general electrochemical applications involving strong redox reactions of transition metals exposed to non-aqueous solutions.

Suggested Citation

  • Noh, Seunghyo & Kang, Joonhee & Kwak, Dohyun & Fischer, Peter & Han, Byungchan, 2014. "First principles thermodynamic studies for recycling spent nuclear fuels using electrorefining with a molten salt electrolyte," Energy, Elsevier, vol. 68(C), pages 751-755.
    • Handle: RePEc:eee:energy:v:68:y:2014:i:c:p:751-755
    DOI: 10.1016/j.energy.2014.02.081
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    Cited by:

    1. Tian, Heqing & Kou, Zhaoyang & Pang, Xinchang & Yu, Yinsheng, 2023. "Molecular dynamics simulation on thermophysical properties and local structure of ternary chloride salt for thermal energy storage and transfer system," Energy, Elsevier, vol. 284(C).
    2. Laura Rodríguez-Penalonga & B. Yolanda Moratilla Soria, 2017. "A Review of the Nuclear Fuel Cycle Strategies and the Spent Nuclear Fuel Management Technologies," Energies, MDPI, vol. 10(8), pages 1-16, August.

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