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Modification of UO2 Fuel Thermal Conductivity Model at High Burnup Structure

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Basic Concepts in Nuclear Physics: Theory, Experiments and Applications (RÁBIDA 2018)

Part of the book series: Springer Proceedings in Physics ((SPPHY,volume 225))

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Abstract

The thermal conductivity of UO2 under in-pile irradiation changes due to produced porosity. This paper has calculated evolution of fuel swelling and porosity by using a model of fuel matrix swelling due to fission gases that is valid for range of low temperature and burnups up to 120 MWd/KgU where high burnup structure (HBS) is formed. The HALDEN thermal conductivity correlation is selected for study of the fuel swelling and porosity evolution effect on irradiated UO2 thermal conductivity. In addition, the correlation is completed with a proposed porosity factor. With considering porosity evolution by burnup, is seen a reduction about 25% in the thermal conductivity which increases the fuel temperature. Calculation results indicate a good agreement with experimental data.

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References

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Authors and Affiliations

  1. Nuclear Science and Technology Research Institute (NSTRI), P. O. Box 14155-1339, Tehran, Iran

    B. Roostaii, H. Kazeminejad & S. Khakshournia

Authors
  1. B. Roostaii
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  2. H. Kazeminejad
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  3. S. Khakshournia
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Corresponding author

Correspondence to B. Roostaii .

Editor information

Editors and Affiliations

  1. Department of Integrated Sciences, Faculty of Experimental Sciences, University of Huelva, Huelva, Spain

    José-Enrique García-Ramos

  2. Department of Atomic, Molecular and Nuclear Physics, Faculty of Physics, University of Seville, Seville, Spain

    María V. Andrés

  3. Department of Atomic, Molecular and Nuclear Physics, Faculty of Physics, University of Seville, Seville, Spain

    José A. Lay Valera

  4. Department of Atomic, Molecular and Nuclear Physics, Faculty of Physics, University of Seville, Seville, Spain

    Antonio M. Moro

  5. Department of Integrated Sciences, Faculty of Experimental Sciences, University of Huelva, Huelva, Spain

    Francisco Pérez-Bernal

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Roostaii, B., Kazeminejad, H., Khakshournia, S. (2019). Modification of UO2 Fuel Thermal Conductivity Model at High Burnup Structure. In: García-Ramos, JE., Andrés, M., Valera, J., Moro, A., Pérez-Bernal, F. (eds) Basic Concepts in Nuclear Physics: Theory, Experiments and Applications. RÁBIDA 2018. Springer Proceedings in Physics, vol 225. Springer, Cham. https://doi.org/10.1007/978-3-030-22204-8_36

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