Nuclear Engineering and Technology

  • 제47권5호
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  • Pages.588-595
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  • 2015
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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A MODEL STUDY ON MULTISTEP RECOVERY OF ACTINIDES BASED ON THE DIFFERENCE IN DIFFUSION COEFFICIENTS WITHIN LIQUID METAL

  • CHUN, YOUNG-MIN (School of Materials Science and Engineering, Pusan National University) ;
  • SHIN, HEON-CHEOL (School of Materials Science and Engineering, Pusan National University)
  • 투고 : 2015.01.07
  • 심사 : 2015.04.03
  • 발행 : 2015.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study presents an effective method for additional recovery of residual actinides in liquid electrodes after the electrowinning process of pyroprocessing. The major distinctive feature of this method is a reactor with multiple reaction cells separated by partition walls in order to improve the recovery yield, thereby using the interelement difference in diffusion coefficients within the liquid electrode and controlling the selectivity and purity of element recovery. Through an example of numerical simulation of the diffusion scenarios of individual elements, we verified that the proposed method could effectively separate the actinides (U and Pu) and rare-earth elements contained in liquid cadmium. We performed a five-step consecutive recovery process using a simplified conceptual reaction cell and recovered 58% of the initial amount of actinides (U + Pu) in high purity (${\geq}99%$).

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea (NRF)

참고문헌

  1. E.Y. Choi, S.S. Hong, W. Park, H.S. Im, S.C. Oh, C.Y. Won, J.S. Cha, J.M. Hur, Electrochemical reduction process for pyroprocessing, Korean Chem. Eng. Res. 52 (2014) 279-288. https://doi.org/10.9713/kcer.2014.52.3.279
  2. H. Lee, G. Park, K. Kang, J. Hur, J. Kim, D. Ahn, Y. Cho, E.H. Kim, Pyroprocessing technology development at KAERI, Nucl. Eng. Technol. 43 (2011) 317-328. https://doi.org/10.5516/NET.2011.43.4.317
  3. T. Kato, T. Inoue, T. Iwai, Y. Arai, Separation behaviors of actinides from rare-earths in molten salt electrorefining using saturated liquid cadmium cathode, J. Nucl. Mater. 357 (2006) 105-114. https://doi.org/10.1016/j.jnucmat.2006.06.003
  4. T. Murakami, Y. Sakamura, N. Akiyama, S. Kitawaki, A. Nakayoshi, T. Koyama, Electrochemical measurement of diffusion coefficient of actinides and rare earths in liquid Cd, Procedia Chem. 7 (2012) 798-803. https://doi.org/10.1016/j.proche.2012.10.121
  5. K. Uozumi, M. Iizuka, T. Kato, T. Inoue, O. Shirai, T. Iwai, Y. Arai, Electrochemical behaviors of uranium and plutonium at simultaneous recoveries into liquid cadmium cathodes, J. Nucl. Mater. 325 (2004) 34-43. https://doi.org/10.1016/j.jnucmat.2003.10.010
  6. K.C. Song, H. Lee, J.M. Hur, J.G. Kim, D.H. Ahn, Y.Z. Cho, Status of pyroprocessing technology development in Korea, Nucl. Eng. Technol. 42 (2010) 131-144. https://doi.org/10.5516/NET.2010.42.2.131
  7. F. Lantelme, H. Groult, Molten Salts Chemistry, first ed., Elsevier, Amsterdam, 2013, p. 551.

피인용 문헌

  1. Liquid cadmium cathode performance model based on the equilibrium behaviors of U and Pu in molten LiCl–KCl/Cd system at 500°C vol.528, pp.None, 2015, https://doi.org/10.1016/j.jnucmat.2019.151883