[1D01-06] Fuel Debris

[1D02] Research and human resource development for analysis of fuel debris and decommissioning technology of Fukushima Daiichi nuclear power plants

(10)Properties of Frozen Body of Melted Debris Containing UO₂

*Takashi Onitsuka¹, Kozo Katsuyama², Akihiro Ishimi², Masayoshi Uno¹ (1. Univ. of Fukui, 2. JAEA)

Keywords:Fuel debris, XRD, SEM, Vickers Hardness Test, Nanoindentation Hardness Test

Microstructure and mechanical properties of eutectic, molten and solidified UO₂-B₂O₃/ZrO₂-Al₂O₃ alloys were studied. Miscostructures and compositions in the samples ware determined by means of X-ray diffraction and SEM observation. Mechanical properties of the samples were tested by means of Vickers hardness test, Nanoindentation hardness test and compression test. X-ray computed tomographic scanning were also performed for several samples before the compression test.