二维任意几何子群共振计算及加速优化  

Resonance Calculation and Speedup Optimization for 2D Arbitrary Geometry Subgroup

作　　者：贺雷[1] 吴宏春[1] 曹良志[1] 

机构地区：[1]西安交通大学核科学与技术系,西安710049

出　　处：《核动力工程》2013年第S1期5-9,共5页Nuclear Power Engineering

摘　　要：共振计算是反应堆组件堆芯设计和燃料管理的基础。子群共振计算方法基于共振能群子群截面,调用输运程序作为求解器,对子群中子注量率进行求解并且归并得到有效共振自屏截面,实现任意二维复杂几何的共振计算。由于子群方法在每个共振能群内部需要反复调用输运求解器,因此和等价理论相比速度较慢及本文基于子群方法的理论模型和自主开发的子群共振计算程序,提出并且完成了多群数据库、输运计算源项及多共振核素迭代的优化方案。通过基准题的验证可知,该方案在保持精度的同时提高了子群程序的计算效率,保证了该程序在工程上的实用性。Resonance calculation is the footstone of the reactor lattice design,core design and fuel management.The subgroup resonance calculation method which bases on subgroup parameter,uses the transport equation as a solver and solves the subgroup flux for effective resonance self-shield cross section,finally achieves 2D complicated geometrical resonance calculation.As the transport solver is used iteratively for every resonance energy group,the calculation efficiency is lower than that of equivalence theory.This study is based on the subgroup resonance method and subgroup resonance calculation code designed by ourselves.The multi-group library,transport calculation source,and multi resonance nuclides iteration are proposed and completed.The verification of benchmarks showed that the scheme can increase the efficiency while keeping the same accuracy and insure the engineering practicability.

关 键 词：子群方法 效率 优化 

分 类 号：O152.1[理学—数学]