Visualized Numerical Analysis of Fustar Reactor Based on Modelica Language

Abstract

AbstractFuSTAR is a new small fluoride-salt-cooled high-temperature reactor designed for the energy needs of remote western regions. The TRISO fuel and helical cruciform fuel elements used in FuSTAR and the integrated core design enables inherent safety. Modelica is a process description language based on object equations. It has key features such as non-causal expression and model reuse, which achieve repeatable visual modeling by connecting components. By modeling and simulating FuSTAR using the Modelica, studies were carried out under steady-state as well as multiple transients to understand the primary loop system response of FuSTAR under accident scenarios. The results show that the parameters of the primary loop system cannot exceed the safety limit with the insertion of step reactivity and after changing the size of the temperature coefficient of reactivity, the model can give a reasonable response.