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Simulating melt spreading into shallow water using moving particle hydrodynamics with turbulence model

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Abstract

In this study, molten metal spreading into water is calculated using moving particle hydrodynamics (MPH) which is one of the particle methods. The spreading and solidification behavior of the molten metal is simulated and compared with the experiment, which is for predicting the fuel debris spreading in the primary containment vessel (PCV) in Fukushima Daiichi Nuclear Power Plant (1F NPPs). The calculation and experiments were carried out with various water levels. To simulate the turbulence effect which enhances the heat transfer between the molten metal and water, large eddy simulation (LES) model was taken in the calculation. The solidification behaviors of the molten metal were expressed by the solid fraction-dependent viscosity model together with solving the energy equation. The solidification behavior depending on the water level was well reproduced by the introduction of the turbulence model.

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Acknowledgements

This study is partially supported by Mitsubishi Heavy Industry (MHI). The authors would like to appreciate the committee member of MHI for giving us meaningful discussion and comments.

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Authors and Affiliations

  1. Department of Nuclear Engineering and Management, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8654, Japan

    Ryo Yokoyama

  2. National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8568, Japan

    Masahiro Kondo

  3. Institute of Engineering Innovation, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan

    Shunichi Suzuki

  4. Nuclear Professional School, The University of Tokyo, 2-22 Shirane, Shirakata, Tokai-mura, Ibaraki, 319-1188, Japan

    Koji Okamoto

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Yokoyama, R., Kondo, M., Suzuki, S. et al. Simulating melt spreading into shallow water using moving particle hydrodynamics with turbulence model. Comp. Part. Mech. 10, 677–690 (2023). https://doi.org/10.1007/s40571-022-00520-7

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