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高圧域での沸騰機構解明に向けた研究,1; 高圧域沸騰面気液挙動計測技術の開発

Study on the boiling mechanism under the high pressure region, 1; Development of the measurement technique to detect the liquid-vapor behavior vicinity of heating surface under the high pressure

小野 綾子 ; 山口 学*; 坂下 弘人*; 上澤 伸一郎  ; 柴田 光彦 ; 吉田 啓之  

Ono, Ayako; Yamaguchi, Manabu*; Sakashita, Hiroto*; Uesawa, Shinichiro; Shibata, Mitsuhiko; Yoshida, Hiroyuki

軽水炉における機構論的限界熱流束予測手法の確立が必要とされているものの、高圧域における沸騰現象の理解は実験の困難さからほとんど進んでいない。高圧域における沸騰現象の理解と限界熱流束モデルの構築に資するために、高温高圧下で沸騰面ごく近傍の気液微細挙動を計測することができる静電容量式プローブを開発した。開発したプローブとその妥当性検証試験結果について報告する。

The establishment of the evaluation method of the critical heat flux for light water reactors is needed. However, the boiling phenomena under high pressure remain to be clarified. The measurement system based on detecting the electric capacitance has been developed, which detects the liquid-vapor behavior vicinity of the heating surface in order to clarify the mechanism of the critical heat flux under the higher pressure region. In this study, the detail of the measurement system and the result to confirm the validity of the measurement system are reported.

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