Air Clearing Oscillation Produced by APR1400 Prototype Sparger Available to Purchase

KAERI has performed a series of experiments to investigate the performance of APR1400 prototype sparger in view of the dynamic load oscillation with the variation of test conditions such as discharged air mass, submergence of the sparger, valve opening time, and pool temperature during the air-clearing phase. The air mass and pool temperature are in the range of 0.8 ∼ 1.5 kg and 20 ∼ 90°C, respectively. The valve opening time can be adjusted in the range of 0.6 ∼ 1.7 sec according to the POSRV operating conditions. The maximum positive pressure amplitude, which is observed at the bottom of the quench tank, is increased with the submergence depth and maximum header pressure of sparger. The valve opening time has a considerable effect on the maximum amplitude. As the opening time decreases, the maximum amplitudes at the tank wall are increased. Air mass and pool temperature, however, have a weak effect on the maximum amplitude. Oscillation frequency is decreased with air mass in the range of 2.5 ∼ 4.5Hz.