一步法输运计算程序KuaFu开发与验证

为了拓展一步法输运计算方法在结构复杂先进反应堆中的应用,基于构建实体几何理论及二维/一维耦合方法,采用C++、Python混合编程开发了一步法输运计算程序KuaFu,并应用粗网有限差分方法(CMFD)、大规模并行技术对二维/一维耦合方法进行加速。通过C5G7基准题对几何建模的可视化功能、并行功能及计算精度进行评估,获得计算结果与蒙特卡罗程序(MCNP)的相对误差。计算结果表明,程序具有较好的可视化功能和用户友好性;KuaFu程序与MCNP参考解符合较好,计算精度良好。

Development and Verification of Direct Transport Code KuaFu

To develop the adaptability of the direct transport method for advanced reactors with complicated geometry, the constructive solid geometry method and the 2D/1D transport method were adopted in a newly-developed direct transport code KuaFu. C++/Python hybrid programming was used. A 2D/1D transport solver with CMFD acceleration method and parallel technology was developed in KuaFu. With the validation of the C5G7 benchmark, these techniques were evaluated, and the difference between KuaFu and Monte-Carlo code MCNP are listed. All results show that KuaFu is with good accuracy compared with reference results. The CMFD and parallel method improves the efficiency significantly.