Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Comparisons of 2-D and 3-D IVR experiments for oxide layer in the three-layer configuration

  • Bae, Ji-Won (Department of Nuclear Engineering, Kyung Hee University) ;
  • Chung, Bum-Jin (Department of Nuclear Engineering, Kyung Hee University)
  • Received : 2019.11.27
  • Accepted : 2020.04.12
  • Published : 2020.11.25
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Abstract

We performed 3-D (3-dimensional) IVR (In-Vessel Retention) natural convection experiments simulating the oxide layer in the three-layer configuration, varying the aspect ratio (H/R). Mass transfer experiment was conducted based on the analogy to achieve high RaH's of 1.99 × 1012-6.90 × 1013 with compact facilities. Comparisons with 2-D (2-dimensional) experiments revealed different local heat transfer characteristics on upper and lower boundaries of the oxide layer depending on the H/R. For the 3-D shallow oxide layer, the multi-cell flow patterns appeared and the number of cells was considerably increased with the H/R decreases, which differs with the 2-D experiments that the number of cells was independent on H/R. Thus, the enhancement of the downward heat transfer and the mitigation of the focusing effect were more noticeable in the 3-D experiments.

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References

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