基于SuperMC／MCAM与SimpleGEO的FLUKA辐射输运建模能力对比

Performance Comparison of Radiation Transport Modeling Capabilities for FLUKA between SuperMC/MCAM and SimpleGEO

蒙特卡罗程序FLUKA传统的手工几何建模不直观、费时费力。针对FLUKA自动建模,欧洲核子中心发展了蒙特卡罗辅助建模软件SimpleGEO,但无法直接处理工程CAD模型和复杂几何。针对FLUKA建模面临的困难,FDS团队基于SuperMC/MCAM多物理耦合分析自动建模软件开发了FLUKA建模功能。本文选取具有代表性的ex7、Neutron-Maze、FDS-Ⅱ模型和ITER基准模型对SuperMC/MCAM和SimpleGEO的建模性能进行测试对比。测试内容涵盖了模型栅元体积、真空通量及真实物理输运结果。测试结果表明,SuperMC/MCAM能处理结构更为复杂的几何模型,且具备转换工程CAD几何模型的能力,相对于SimpleGEO几何处理能力更强。

Manually modeling for FLUKA would spend lots of time and error prone. In order to improve the modeling efficiency for FLUKA users, European Organization for Nuclear Research＇ （CERN） developed the Monte Carlo auxiliary modeling software SimpleGEO, but it can not deal with the CAD model and complex geometry. For the modeling problems of FLUKA, FDS Team developed FLUKA modeling module based on multi-physics coupling analysis modeling program （SuperMC/MCAM）. In this paper, the modeling capabilities of SuperMC/MCAM and SimpleGEO were compared on several benchmarks including ex7, Neutron-Maze, FDS-II and ITER benchmark models. The contents cover volume, vacuum-flux and particle transport with physical parameters. The comparison results show that SuperMC/MCAM can deal with more complex geometry models of FI.UKA and have extra ability to convert the CAD models than SimpleGEO, which are SuperMC/MCAM＇s advantages in FLUKA modeling.