Analysis of Fuel Salt Relocation from the Reactor Vessel to the Drain Tank in Molten Salt Reactor (MSR) with Moving Particle Semi-Implicit (MPS) Method Aziz Satrio, Muhamad Daffa Fawwaz, Yulia Mifftah Huljanah, Asril Pramutadi Andi Mustari
Bandung Institute of Technology
Abstract
The Molten Salt Reactor (MSR) is a fourth-generation reactor whose technology has been proven by MSRE^s operations at ORNL. This reactor has a highly inherent safety system. Then, it has ability to extinguish multiple reactors and is carried out passively. Fuel salt in MSR can flow to drain tank by opening melt valve when temperature exceeds the limit. Understanding relocation of fuel salt is essential to improve reactor safety and performance. In this study, we present a particle-based approach using the Moving Particle Semi-Implicit (MPS) method, which represents fluid as particles that carry physical properties. We analysed the dynamics of several types of fuel salt at MSR. The fuel salt variations tested were LiF-NaF-KF, LiF-BeF2, KCl-MgCl2, and NaNO3-NaNO2-KNO3. In addition, temperature variations of 700K, 850K, and 950K were carried out on LiF-NaF-KF. The simulation uses the 2D geometry of MSRE reactor design. This simulation results show that NaNO3-NaNO2-KNO3 has movement with the greatest speed compared to other fuel salt. At 950K for LiF-NaF-KF has the greatest velocity compared to other variations. These results can be taken into account in selection of right saline fuel mixture and the understanding of its flow characteristics for safe and effective MSR operation, which is crucial for improving the safety of nuclear reactors.
Keywords: Drain Tank, Fuel Salt, MPS method, MSR
Topic: Material and Process for Innovative Energy Systems
