Simulation of Fluid Sloshing in Core Catcher for Nuclear Accident Using Moving Particle Semi-Implicit Method Asril Pramutadi Andi Mustari, Stefany Imanuel Sihombing, Anni Nuril Hidayati
Institut Teknologi Bandung
Abstract
Fluid sloshing simulations and tests were performed in a nuclear reactor scheme, especially core meltdown, using the moving particle semi-implicit (MPS) method. The MPS method is a method for analyzing the interactions between incompressible particles. In this method, the fluid is represented by particles, and each particle carries physical information such as position, velocity, pressure, and temperature. The fluid sloshing experiment was carried out using a glass bowl with dimensions of 11 cm x 20 cm x 9 cm and a glass cup with a diameter of 7 cm. The fluids used are water and cooking oil. The results of experiments and simulations with MPS show that the sloshing height of the water both in the middle and at outer wall of the bowl is higher than oil due to the greater viscosity of water. The fluid becomes thinner and easier to move as the viscosity increases. In addition, the results indicate that sloshing height of the fluid at the outer wall of the bowl is always greater than in the center of the bowl due to the forces acting on the fluid when it comes into contact with the walls of the bowl. The sloshing height from the experiment is greater than the simulation results due to the lifting process of the glass. This study conducted experiments and simulations to determine the fluid dynamics and the effect of fluid differences during fluid sloshing on a representative surface with a core catcher.
