Preliminary Study of Temperature Homogenisation in Experimental Power Reactor Hot Gas Chamber

BATAN's proposed Experimental Power Reactor (RDE) has an issue concerning severe temperature deviation in hot coolant gas channel. To ensure longevity of downward component such as heat exchanger, temperature deviation must be kept as low as possible. Simulation of gas mixing in a full-scale hot gas chamber was performed to study the temperature homogenisation of hot and cold coolant gas, using simplified design. The simulation showed that temperature homogenisation of the coolant was around 99.63%, translated into temperature difference of 0.74°C. This preliminary result shows that the proposed hot gas chamber design is potentially suitable for use in RDE. Pressure drop is also discussed.