Effects of Internal Circulation Velocity and Noncondensable Gas on Vapor Condensation from a Rising Bubble

The effects of internal circulation velocity and the presence of noncondensable gas on vapor removal rate by condensation from a rising large vapor-gas bubble produced in a hypothetical core disruptive accident are investigated by solving the resulting transient heat and mass transfer problem of turbulent flow. Sample calculations are performed for the condensation of UO₂ and sodium vapors containing noncondensable fission gases. The time-averaged condensation heat transfer coefficients are presented for the condensation of UO₂ and sodium vapors for different internal circulation velocities and the concentration of noncondensable gas.