Characterization of the VULCANO test products for fuel debris removal from the Fukushima Daiichi Nuclear Power Plant

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  • Kitagaki Toru
    Japan Atomic Energy Agency / International Research Institute for Nuclear Decommissioning
  • Ikeuchi Hirotomo
    Japan Atomic Energy Agency / International Research Institute for Nuclear Decommissioning
  • Yano Kimihiko
    Japan Atomic Energy Agency / International Research Institute for Nuclear Decommissioning
  • Ogino Hideki
    Japan Atomic Energy Agency / International Research Institute for Nuclear Decommissioning
  • Haquet Jean-François
    Commissariat à l’énergie atomique et aux énergies alternatives
  • Brissonneau Laurent
    Commissariat à l’énergie atomique et aux énergies alternatives
  • Tormos Brigitte
    Commissariat à l’énergie atomique et aux énergies alternatives
  • Piluso Pascal
    Commissariat à l’énergie atomique et aux énergies alternatives
  • Washiya Tadahiro
    Japan Atomic Energy Agency / International Research Institute for Nuclear Decommissioning

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Description

The characteristics of fuel debris are required to develop tools to remove it from severely damaged nuclear power plants, but the knowledge on molten core concrete interaction (MCCI) product is limited. The VULCANO MCCI test campaign, VBS-U4, was selected for the analysis as the conditions are similar to MCCI at Fukushima daiichi nuclear power plant. Physicochemical phenomena during MCCI were estimated from the macrostructure of the samples. Moreover, heterogeneous microstructure of the oxide region and homogeneous microstructure of the metallic region was confirmed. Additionally, the obvious difference of Vickers hardness between oxide and metallic phase is evaluated.

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