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

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

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.