SIMULATION OF FREEZE-VALVE IN MSR (MOLTEN SALT REACTOR) IN ACCIDENT CONDITIONS WITH MPS (MOVING PARTICLE SEMI-IMPLICIT)

• Main Author: Eben Ezer Mahulae, Virgo
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/49341
• Institution: Institut Teknologi Bandung

MSR (Molten Salt Reactor) is a type of reactor that uses liquid fuel, which is liquid salt which also functions as a cooler. A freeze-valve is a safety system in the MSR that is designed to melt when the temperature of the fuel approaches the melting point of the reactor wall so that it is open and fuel can flow into the subcritical-tank. A simplification of the concept of freeze-valve has been successfully carried out in several experiments to study the mechanism of action of the freeze-valve. The mechanism of action of the freeze-valve is also simulated using the MPS method or the Moving Particle Semi-implicit method. This research was conducted to analyze the effect of several variations of fluid temperature (water) on one type of thickness of the freeze-valve (paraffin material) and the effect of thickness variations on two fluid temperatures. Temperature variations made on paraffin with a thickness of 15 mm and a diameter of 23 mm are 60, 70, 80, and 900C. The first thickness variation made was 10, 13, and 20 mm with a diameter of 23 mm against 800C fluid. The second thickness variation made is 9, 11, and 16 mm with a diameter of 28 mm against 900C fluid. Based on the temperature variations, each paraffin experienced erosion of 1, 3, 5, and 9 mm. For variations in thickness with 800C fluid, each paraffin experienced an erosion of 7, 6, and 8 mm. As for the thickness variation with the fluid, each paraffin experienced an erosion of 9 mm (finished in 9 minutes 43 seconds), 11 mm (finished in 8 minutes 37 seconds), and 11 mm.