Experimental study of raining effect on the inner surface of containment roof

摘要

China Gen III NPPs is designed with PCS. When PCS starts running, the water level in IRWST may lower down due to the condensate loss on containment roof through raining, the loss of condensate will affect the effectiveness and response time of PCS. To observe the raining phenomenon and eventually evaluate heat removal capacity and response time of the PCS, a containment dome slice experimental facilities was constructed to get the lose part of the condensate. The test plate surface is 1.5 m x 0.6 m, suspended in diameter 2.5 m, high 4.5 m pressure vessel. A canon camera was set to record the images and videos of the condensation flow phenomenon through 6 viewports on the pressure vessel. Raindrop faction and flow phenomena in the presence of air under different angle were investigated under the condition of pressure ranged from 0.2 to 0.6 MPa and air concentration ranged from 14 to 69%. (C) 2019 Elsevier Ltd. All rights reserved.