Fig. 1. Schematic diagram of the experimental facility

Fig. 2. Temperature transient diagram of pool at different steam mass flux

Fig. 3. Schematic diagram of formation mechanism of thermal interface

Fig. 4. Temperature transient diagram of pool at submerged depth of 2.2 m

Fig. 5. Temperature distribution in pool height direction at different submerged depths

Fig. 6. Temperature transient diagram of pool while gas-water volume ratio equals 0.56

Fig. 7. Temperature distribution in pool height direction at different gas-water volume ratio