六角形轻水堆组件中子通量密度分布的计算

Calculation for the Flux Distribution in Hexagonal fuel Assembly of LWR

介绍利用穿透概率法求解二维六角形轻水堆燃料组件中子通量密度分布。子区内中子源及通量密度在空间上采用二次分布 ,子区表面通量密度在空间上采用平通量密度分布 ,在方向上采用简化 6P1近似。根据提出的模型 ,编制了TPHEX D程序 ,并对一些轻水堆六角形组件问题作了计算 ,计算结果与MC结果进行了比较 ,符合良好。本程序可用于六角形轻水堆燃料组件计算。

The model of calculating the flux distribution in the 2 D hexagonal fuel assembly of LWR by transmission probability method is described. The distributions of the sources and their flux within the meshes are assumed to be isotropic and quadratic dependent on x and y coordinates. On the mesh surfaces,the constant space distribution and the simplified 6P 1 approximation for the angular distribution are considered. Based on the proposed model, the code TPHEX D is developed and some culculations for hexagonal fuel assembly of LWR have been completed. Results being compared with those of MC method,good agreement is obtaimed. The code TPHEX D can be used for the calculation for the hexagonal fuel assembly of LWR.