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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。
The multi-purpose grid computing program SONG adopts the method of characteristic line (MOC) and coarse finite difference (CMFD) acceleration to calculate the neutron transport, and has the capability of fine geometry calculation of all components under the cluster structure of database. At the same time with geometric MOC adaptive pretreatment module, module-based modular ray tracing, can handle square, hexagonal components and rod, plate fuel element. Through the modular design of flow and data structure, a geometry-independent MOC transport solver module has been developed and a scalable component geometry preprocessing module has been developed. Geometry processing module with different shape components and transport solution module has a unified data interface. The calculation of related problems shows that the SONG program has the ability to process multi-geometry components, and the transport calculation results have better accuracy, efficiency and stability.