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Science in China Series B: Chemistry

, Volume 51, Issue 7, pp 700–704 | Cite as

Kinetics study on the dissolution of UO2 particles by microwave and conventional heating in 4 mol/L nitric acid

  • YunFeng Zhao
  • Jing ChenEmail author
Article

Abstract

The dissolution of UO2 particles in 4 mol·L−1 nitric acid medium at temperatures of 90–110°C by microwave heating and conventional heating has been investigated, respectively. It is found that the dissolution ratios of UO2 particles by microwave heating were 10%–40% higher than that by conventional heating. Kinetics research shows that the dissolution of UO2 particles in 4 mol·L−1 nitric acid is controlled by the diffusion control model for microwave heating and by the surface reaction control model for conventional heating. The diffusion control model for the dissolution of UO2 particles by microwave heating could be explained by the diffuseness on the surface of UO2 particles.

Keywords

uranium dioxide nitric acid dissolution microwave heating 

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References

  1. 1.
    Taylor F, Sharratt W, Chazal L D, Logsdail D H. Dissolution rates of uranium dioxide sintered particles in nitric acid systems. J Appl Chem, 1995, 13: 32–40CrossRefGoogle Scholar
  2. 2.
    Ikeda Y, Yasuike Y, Nishimura K, Hasegawa S, Takashima Y. Kinetic study on dissolution of UO2 powders in nitric acid. J Nucl Mater, 1995, 224: 266–272CrossRefGoogle Scholar
  3. 3.
    Fukasawa T, Ozawa Y, Kawamura F. Generation and decomposition behavior of nitrous acid during dissolution of UO2 particles by nitric acid. Nucl Technol, 1991, 94: 108–113Google Scholar
  4. 4.
    Ikeda Y, Yasuike Y, Takashima Y. 17O NMR study o dissolution reaction of UO2 in nitric acid mechanism of electron transfer. J Nucl Sci Technol, 1993, 30: 962–964CrossRefGoogle Scholar
  5. 5.
    Heisbourg G, Hubert S, Dacheux N, Ritt J. The kinetics of dissolution of Th1−xUxO2 solid solutions in nitric media. J Nucl Mater, 2003, 321: 141–151CrossRefGoogle Scholar
  6. 6.
    Al-Harahsheh M, Kingman S W. Microwave-assisted leaching—A review. Hydrometallurgy, 2004, 73: 189–203CrossRefGoogle Scholar
  7. 7.
    Tang Yaping, Xu Zhichang, Zhang Fuhong. Total gelation process for the preparation of UO2 fuel kernel and its progress. J Tsinghua Univ (Sci&Tech) (in Chinese), 1997, 37: 61–65Google Scholar
  8. 8.
    Al-Harahsheh M., Kingman S W. The reality of non-thermal effects in microwave assisted leaching systems? Hydrometallurgy, 2006, 84: 1–13CrossRefGoogle Scholar
  9. 9.
    Ikeda Y, Yasuike Y, Takashima Y. Short note 17O NMR study on dissolution reaction of UO2 in nitric acid—mechanism of electronic transfer. J Nuclear Sci Tech, 1993, 30: 962–964CrossRefGoogle Scholar
  10. 10.
    GUO Yifei, LIANG Junfu, JIAO Rongzhou, LIU Xiuqi. Spectro-photometric determination of uranium in high-level liquid waste and its separation process with arsenazo III. Atom Ener Sci Tech (in Chinese), 2000, 34: 252–258Google Scholar
  11. 11.
    Levenspiel O. Chemical Reaction Engineering, New York: Wiley, 1972. 361–374Google Scholar
  12. 12.
    Hass P A. Heating of uranium oxides in a microwave oven. Am Ceram Soc Bull, 1979, 58: 873Google Scholar

Copyright information

© Science in China Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  1. 1.Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijingChina

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