SONG—输运计算模块程序开发

SONG—Development of Transport Modules

多功能栅格计算程序SONG采用特征线方法(MOC)及粗网有限差分(CMFD)加速方法进行中子输运计算,具备在数据库能群结构下全组件精细几何计算能力。同时具有与MOC相适应的几何预处理模块,采用基于组件的模块化射线追踪,可处理方形、六角形组件及棒状、板状燃料元件。通过模块化的流程与数据结构设计,开发形成了几何无关的MOC输运求解模块,同时形成了可扩展的组件几何预处理模块。不同形状组件的几何处理模块与输运求解模块具有统一的数据接口。通过相关问题的计算表明,SONG程序具备多几何组件处理能力,同时输运计算结果具有较好的精度、效率及稳定性。

Method Of Characteristics(MOC) and Coarse-Mesh Finite Difference(CMFD) were adopted for the transport and accelerate calculation in the SONG code, which is capable of direct lattice calculation in library group structure. The geometry modules of SONG code implement the lattice based modular ray tracing for hexagonal or square lattice with pin-type or plate-type fuel elements. By modular programming and scientific data structure designing, the geometrical independent transport module and expansible geometry modules were developed. Geometry modules for different shape lattices share the uniform data interface with the transport module. The numerical results indicate that SONG code has the ability of treating the multiform lattices, and is with well performance in terms of precision, efficiency and stability.