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マイクロ波加熱による突沸現象に関する研究

Study on flushing phenomena generated by microwave heating

八巻 辰徳*; 金子 暁子*; 阿部 豊*; 瀬川 智臣 ; 川口 浩一  ; 山田 美一 

Yamaki, Tatsunori*; Kaneko, Akiko*; Abe, Yutaka*; Segawa, Tomoomi; Kawaguchi, Koichi; Yamada, Yoshikazu

日本では原子炉の使用済燃料の再処理施設の脱硝転換工程にマイクロ波加熱脱硝法が採用されている。脱硝転換工程のスケールアップを検討するにあたり、脱硝容器形状の最適化のため、加熱脱硝時に生じる溶液の沸騰現象の可視化観測を実施した。容器直径,初期液位,マグネトロン出力が突沸の発生に及ぼす影響を評価し、突沸の発生機構やその支配因子を明らかにした。

In Japan, the microwave heating method is adopted in the conversion process of reprocessing facility for spent fuels of a nuclear reactor. When the scale-up of the conversion process is considered, visualization observation of flushing phenomena by microwave heating was experimented in order to optimize the structure of denitration containers depending on the scale of throughput. Evaluation of the effects of the diameter of a container, initial level of liquid, and microwave power on the conditions for the generation of flusing was conducted, and it was clarified that the mechanism of the generation of flushing and dominant factor.

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