EKSPERIMENTAL STUDY ON THE CARACTERISTICS OF THE AP1000 NUCLEAR REACTOR PASSIVE CONTAIMENT COOLING SYSTEM BY WATER FILM

• Main Author: REINHARD. E. E. MANALU (NIM : 13106095); Dosen Pembimbing : Dr. Ir. Ari Darmawan Pasek, T.
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17452
• Institution: Institut Teknologi Bandung

One of mechanism utilized by the next-generation PWR nuclear reactor for cooling it’s containment passively is gravitationally falling liquid cooling. Since the water film flow performance in the Passive Containment Cooling System (PCCS) application is closely related to the safety, film cooling characteristics should be studied experimentally or theoretically. This paper focuses on the experimental study of water mass flow rate and heat flux level effects on the characteristics of AP1000 containment wall cooling by laminar water film. This research was started with designing gravitational falling liquid cooling <br /> <br /> <br /> system, assembly of contaiment system and gravitational falling liquid cooling system, calibration of measuring device, and data collecting. Data collecting started in steady state condition before the contaiment was sprayed with water until steady state condition achieved after the contaiment was sprayed with water. The result of this research shows that wall temperature significantly cooled <br /> <br /> <br /> after being sprayed with water while temperatur rise happen on lateral direction of the ellips sector and cylinder area. The thickness of water film increases with increasing <br /> <br /> <br /> lapisan air flow rate and remained constant with increasing wall heat flux. For laminar flow condition, the heat transfer coefficient decreases as film mass flow rate increase due to the increase of film thickness which causes the increase of the thermal resistance. Moreover, the heat transfer coefficient increases as the wall heat flux <br /> <br /> <br /> increases since the increasing heat flux will decrease the water film thickness which is finally causing the decrease of the thermal resistance. Generally, the value of h* from <br /> <br /> <br /> this research have the same trendline graphics and have value lower than general corelation of heat transfer to bulk water film which Diah [2] have suggested. The software can simalate the characteristics of to bulk water film if actual ambient temperature is used. In principle, for laminar water film flow condition, the film mass flow rate can be kept at a minimum to enhance the heat transfer coefficient.