Neutronics Modeling and Simulation for Thea Energy Stellarator Design

Thea Energy's first flagship stellarator device will operate with DD plasma, presenting a distinct set of neutronics challenges and solutions compared to the typical DT designs. Neutronics modeling and simulation plays a crucial role in evaluating the performance and safety characteristics of these type of fusion reactors. We developed a neutronics model of our stellarator using the OpenMC Monte Carlo particle transport code. The simulation considered various blanket configurations, materials, and thicknesses, allowing for the investigation and optimization of key neutronics parameters, such as: tritium breeding ratio, neutron flux distribution, and material activation levels. We have also conducted neutronics streaming studies to ensure proper placement of diagnostic equipment and ports. The results highlighted areas for potential optimization and improvements for our stellarator design. This has contributed to a deeper understanding of the neutronics behaviors and performance in a compact and modular DD stellarator. The results obtained through this study will serve as a foundation for further optimization and design refinements, guiding the development of safe, modular, and efficient stellarator designs.