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在快中子反应堆中,中等核素的散射共振现象以及空间耦合效应较为明显。为解决此问题,使用基于蒙特卡罗方法的Open MC程序产生少群快堆组件参数,传递给基于确定论方法的堆芯程序进行混合计算。采用二维径向-轴向坐标几何的等效堆芯作为产生组件参数的计算模型。数值结果表明,该方法很好地解决了结构材料在高能区的散射共振现象;同时混合计算的相对误差均小于1%,可应用于快堆的稳态计算。
In fast neutron reactors, the phenomenon of scattering resonance of medium nuclides and the spatial coupling effect are obvious. In order to solve this problem, the Open MC program based on Monte Carlo method is used to generate a small group of fast reactor component parameters, which is passed to the core program based on the deterministic method for mixed calculation. The equivalent core of two-dimensional radial-axial coordinate geometry is used as the calculation model to generate the component parameters. The numerical results show that this method can well solve the scattering resonance phenomenon of the material in the high energy region. The relative errors of the hybrid calculations are less than 1%, which can be applied to the steady state calculation of fast reactor.