Calculation of Radiation Field and Shutdown Dose Rate for Fusion Reactor Based on cosRMC

Abstract For the efficiency and memory bottleneck issues of full reactor high resolution calculation for fusion reactors, this paper carries out the research and program development of an efficient variance reduction algorithm, adaptive mesh algorithm, hybrid parallel algorithm, and unstructured mesh-based shutdown dose rate (SDR) calculation algorithm, which can improve the calculation accuracy of operational and shutdown radiation fields for fusion reactors. The new methods developed in this paper improve the computational efficiency of the Monte Carlo particle transport calculation in the deep penetration problem of fusion reactors, effectively overcome the memory consumption problem of high-resolution calculations for the full reactor, improve the accuracy of shutdown dose rate calculations under complex geometry, and provide efficient computational methods and tools for nuclear design and safety analysis of fusion reactors.