Refine your search�ソスF     
Report No.

Solidification and re-melting mechanisms of SUS-B$$_{4}$$C eutectic mixture

Sumita, Takehiro   ; Kitagaki, Toru  ; Takano, Masahide ; Ikeda, Atsushi  

Fundamental understanding of the high-temperature interaction between stainless steel (SUS) and B$$_{4}$$C is indispensable for estimating and characterizing the fuel debris generated during severe accidents of boiling water reactors (BWR), such as 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 1F, in order to elucidate the solidification and re-melting mechanisms. The results indicated that $$gamma$$-Fe and (Cr,Fe)$$_{2}$$B are the major solidified phases when the B$$_{4}$$C content is below 3 mass%, while (Cr,Fe)$$_{23}$$(C,B)$$_{6}$$ is formed as an additional third phase when the B$$_{4}$$C content exceeds 3 mass%. The solidification of molten SUS-B$$_{4}$$C mixture and re-melting of solidified SUS-B$$_{4}$$C melt are eutectic, which is mainly controlled by the pseudo-binary Fe-B system that is influenced by the C and Cr content and additional minor components such as Mo.



- Accesses




Category:Materials Science, Multidisciplinary



[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.