G0600404 Development of void fraction distribution measurement for boiling two-phase flow in heated rod bundle under high pressure condition

Abstract

We devised the Subchannel void sensor (SCVS), which consists of 6-by-6 wire electrodes and 5-by-5 rod electrodes to acquire boiling two-phase flow dynamics in a 5-by-5 rod bundle at high-pressure and high-temperature conditions. SCVS can acquire a time series data of local void fraction at 32 points of central subchannel region and at 100 points of near rod surface regions. The experimental results exhibit the axial and cross-sectional distributions of void fraction, which are suitable to validate the CFD and subchannel codes.