The heat transfer rates that occur inside and outside surfaces of the passive containment cooling system with both dry and wet outer containment surface following a postulated accident were investigated. The test model represented a 60 section of a containment vessel based on the AP600 geometry. In part 2, the comparitive study between AP600 DVI and ABB-CE System 80+ was carried out with experimental methods. And the effects of deflector were investigated. (Author).