Study of The Effect of Gap Width on APWR Passive Containment Cooling System Santiko Tri Sulaksono (a,b*), Zaki Suud (a), Efrizon Umar (b)
a. Department of Doctoral Nuclear Engineering, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Ganesha 10 Street, Bandung, 40132, Indonesia
*sant012[at]brin.go.id
b. Research Center for Nuclear Reactor Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency (BRIN), Tamansari 71 Street, Bandung, 40132, Indonesia
Abstract
Advance Pressurized Water Reactor is equipped with a safety feature called Passive Containment Cooling System (PCCS). This system uses natural air circulation that cools the outer surface of the container to remove decay heat released inside the containment vessel. The air in the gap between the outer wall of the containment and the baffle absorbs heat and moves up towards the chimney. Cold air will enter through the inlet so that a natural circulation cycle occurs. To obtain the optimal gap width, it is necessary to analyze the heat transfer on the surface of the containment. In this study, a CFD analysis has been carried out with a 1:40 model dimension of the original containment with a gap width of 1 cm, 2 cm and 3 cm. Based on the results of the analysis, the optimum steady-state temperature of the outer surface of the containment occurs at a gap width of 2 cm.
