Development of Subgroup Method 2D Arbitrary Geometry Reso-nance Calculation Code SUGAR
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摘要: 传统共振方法是基于多群数据库插值表的等价理论有理近似方法,其几何适应能力仅限于简单几何,不能胜任复杂情况的共振自屏计算。子群方法基于共振峰的概率分布得到子群参数,利用现有的适用于任意几何的中子输运程序求解子群通量密度,通过子群通量密度权重子群截面,得到具体问题各个共振区的自屏截面。基于子群方法,开发了适用于二维任意几何的子群共振程序(SUGAR)。例题校验结果表明,SUGAR程序适用于二维任意几何共振计算。Abstract: Conventional resonance calculation methods are developed based on the equivalence theory which are only appropriate for the simple regular geometry.It is not capable of dealing resonance calculation for complicated geometries.In this paper,the subgroup resonance calculation method is developed based on the subgroup theory and subgroup neutron transport equation.Resonance calculation is realized for 2D arbi-trary geometry by introducing sophisticated transport solver.Therefore the spatially dependent resonance multi-group cross-sections can be obtained directly by subgroup transport calculation.A computation code SUGAR is developed according to this method and verified by numerical samples.Good accuracy is observed to prove this method and code is very promising for complicate resonance calculation in two dimensional ar-bitrary geometries.
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