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Report No.

Solidification and re-melting mechanisms of metallic debris in 1F

Sumita, Takehiro 

Fundamental understanding of the high-temperature interaction between stainless steel and B$$_{4}$$C is indispensable for estimating and characterizing the fuel debris generated during severe accidents of Fukushima Dai-ichi Nuclear Power Station (FDNPS, also referred to as "1F") in Japan. This study aims at systematically characterizing the solidified products of molten SUS-B$$_{4}$$C mixtures by powder X-ray diffraction (PXRD), scanning electron microscopy- energy dispersive X-ray spectroscopy (SEM-EDS), and thermogravimetry-differential thermal analysis (TG-DTA) with a range of the B$$_{4}$$C content relevant to the fuel debris composition expected at FDNPPs, in order to elucidate the solidification and re-melting mechanisms.



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