Analysis of blowdown and refill phenomena observed in RD-14 loca experiments

Several series of loss-of-coolant experiments were conducted in the RD-14 test facility, and are analysed in this paper. The objective of the analysis is to obtain clear physical understanding of thermal-hydraulic phenomena that occur during the experiments; examples of these phenomena include periods of flow stagnation and flow reversal in the heated sections, the rise in the temperature of the fuel sheath, and phase separation or …