Characteristics of thermal mixing and pressure load during continuous steam discharging phase

KAERI has performed a series of experiments to investigate a thermal-mixing and dynamic pressure behavior during the continuous steam discharge phase. Sparger has the same size as that of APR1400 except for the number of horizontal discharge hole reduced by a factor of 0.44. Load reduction ring has a great influence on the thermal mixing enhancement and dynamic pressure reduction during the steam discharge phase. Main flow pattern in the quench tank is due to vertical downward direction flow induced by LRR and a vertical discharge hole of sparger. Thermal stratification is not observed during the present study