ICONE23-1333 The Effect of Spacer Grid's Elements on the Rewetting Velocity

Abstract

This paper deals with rewetting phenomenon and its impact on the nuclear reactor safety. The complexity of the quench front propagation along the cooled surface, especially near the geometric elements such as spacers is described in detail. This observation is based on the new experimental study with bottom flooding configuration. Initial conditions of this experimental study are follows: surface temperature of 580 ℃, coolant mass flux of 150m^<-2>.s^<-1> and coolant temperature of 50 ℃. The presented results show very high complexity of rewetting phenomenon.