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Report No.

Fundamental research on fission product chemistry, 1; Evaluation of oxidation and vaporization behavior of Boron compound formed in molten control rod blade

Imoto, Jumpei ; Di Lemma, F. G.*; Miwa, Shuhei ; Takano, Masahide ; Osaka, Masahiko 

In order to investigate the Boron (B) release behavior from a Fe-B compounds formed in the melt of BWR control blade under a severe accident, a thermal analysis on a synthesized Fe-B sample was performed to evaluate the oxidation and vaporization behavior. It was found that the oxidation rate of the Fe-B compound was several magnitude of order lower than that of B$$_{4}$$C. This result support the previous report that the vaporization of B through the main release path of the oxidation product B$$_{2}$$O$$_{3}$$ is suppressed by the formation of Fe-B-O compounds in the case of Fe-B compounds.



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