ANALYSIS ON APPLYING PROTACTINIUM ON MOLTEN MIXTURE FOR OPTIMALIZING MOLTEN SALT REACTOR (MSR) FUJI-12 USING SRAC 2006 SIMULATOR

• Main Author: Adiwarna, Hilarius
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/81469
• Institution: Institut Teknologi Bandung

Nuclear Power Plants (NPPs) are a type of power generator that supports Sustainable Development Goals (SDGs) by producing clean, affordable, and climate-friendly energy. This study simulated the MSR FUJI-12 to determine suitable SRAC-2006-and-JENDL-4.0-withCITATION-modules’s parameters. In this research, protactinium (Pa) will be introduced on the molten mixture. The simulation results showed an initial keff of 1.013046 for a U-233 F4 concentration of 0.22%, with a deviation of 0.0354% from the target of 1.0134. However, the final keff remained below 1, at 0.945, prompting an increase in the U-233 F4 concentration to 0.28%. One of the challenges identified was the high Power Peaking Factor (PPF) of 3.49, leading to variations in Pa doping to 0.003%, which proved insufficient. The study continued to optimize the reactor for a Conversion Ratio (CR) close to 1 and a PPF close to 2 by doping other type of burnable poisons, such as Gadolinium (Gd) and Americium (Am); and varying the number of core regions—two and three regions—with different fuel percentage. Following that, it was concluded that—other than Gd— Pa dan Am doping only lowered keff and CR. Lastly, MSR FUJI-12 with three regions and fuel percentages of 50%-30%-40% achieved a CR of 0.962 and a PPF of 2.579. The reactor's limited lifespan could be fixed by online refueling, applicable to MSR technology.