Influence of the adding bottom-up flow rate to the characteristic of the cooling system on TRIGA 2000 Bandung reactor core

Heat generated from the fission reaction will heat up the cladding of the fuel element. For this reason, the fluid which used as a primary coolant in the reactor tank must have a good conductivity. This research is done to know the comparison between the performance of the natural convection cooling system and the performance of the forced convection cooling system which is done by spraying the bottom-up flow rate to the cylindrical nuclear reactor core. The result shows that the forced convection by adding spray pipe has a better performance than that of the natural convection. This case is indicated by decreasing of the maximum temperature on the top of the reactor core from 88,55°C to 47,35°C after the adding bottom-up flow rate. It can be assumed that the adding of the spraying bottom-up flow rate will give a better performance on the cooling system and will reduce the bubbles formation. (author)