An Experimental Investigation Of Direct Contact Condensation Of Saturated Steam On Subcooled Liquid In Passive Safety Injection System

The project studied the direct contact condensation behavior of saturated steam on the subcooled liquid in passive gravity injection system. The experiment parameters were as follows: The initial pressure of PRZ ranged from 0.2－0.6MPa and the initial fluid temperature of Core Makeup Tank ranged from 10－80℃. Condensation phenomenon in CMT was observed. Pressures, water level, surface and axial temperatures and total clotted liquid were obtained and analyzed. By experimental phenomenon, the condensation process was divided into two phases: steam supply limit and condensation limit. The interfacial heat transfer coefficient in steam supply limit phase was calculated. A correlation was studied out here:, for experiment with sparger 1#; , for experiment with sparger 2#.Sparger decreased interfacial heat transfer coefficient, total clotted liquid and steam energy transfer and weakened surface temperature vibration. It also decreased thickness of hot water layer, attenuated steam condensation and shortened the time of balance.