Method of Characteristics for 3D, Full-Core Neutron Transport on Unstructured Mesh
Method of Characteristics for 3D, Full-Core Neutron Transport on Unstructured Mesh
复制标题
非结构化网格上 3D 全核中子输运特性方法
作者：
D. Gaston;B. Forget;Kord Smith;Logan H. Harbour;G. Ridley;G. Giudicelli
摘要目前正在考虑将无数的核反应堆设计用于下一代电力生产。这些设计利用独特的几何形状和材料，并可以依靠多物理场效应来实现安全和操作。这项工作开发了一个中子输运工具，MOCkingbird，能够三维（3D），全芯反应堆模拟以前棘手的几何形状。求解器基于特征线法，采用非结构化网格进行几何描述。MOCkingbird使用MOOSE多物理场框架构建，允许在未来直接链接到其他物理场。给出了算法和实现的描述，并计算了二维/三维C5 G7和马萨诸塞州理工学院BEAVRS基准的解决方案。最终结果显示了MOCkingbird在3D全核仿真中的应用，该仿真使用了14亿个元素，并使用12000个处理器进行了求解。
Abstract A myriad of nuclear reactor designs are currently being considered for next-generation power production. These designs utilize unique geometries and materials and can rely on multiphysics effects for safety and operation. This work develops a neutron transport tool, MOCkingbird, capable of three-dimensional (3D), full-core reactor simulation for previously intractable geometries. The solver is based on the method of characteristics, utilizing unstructured mesh for the geometric description. MOCkingbird is built using the MOOSE multiphysics framework, allowing for straightforward linking to other physics in the future. A description of the algorithms and implementation is given, and solutions are computed for two-dimensional/3D C5G7 and the Massachusetts Institute of Technology BEAVRS benchmark. The final result shows the application of MOCkingbird to a 3D, full-core simulation utilizing 1.4 billion elements and solved using 12 000 processors.