高保真中子输运程序HNET共振计算方法研究  

Research on the resonance calculation method in the high-fidelity neutron transport program HNET

作　　者：朱雁凌 郝琛 张乐瑞 ZHU Yanling;HAO Chen;ZHANG Lerui(Fundamental Science on Nuclear Safety and Simulation Technology Laboratory,Harbin Engineering University,Harbin 150001,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]哈尔滨工程大学核安全与仿真技术重点学科实验室,黑龙江哈尔滨150001 [2]清华大学核能与新能源技术研究院,北京100084

出　　处：《哈尔滨工程大学学报》2023年第5期808-814,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(12075067);国家重点研发计划(2018YFE0180900)。

摘　　要：为实现精细化中子物理计算程序HNET高效、精确的共振计算,本文基于自主开发的HDF5格式多群数据库研究并优化了子群共振计算方法。针对子群参数的计算,研究并实施了经调整拟合点方法优化后的帕德近似法,以保证子群参数计算的准确性;为提高计算效率,需解决传统子群方法频繁调用中子输运求解器的问题,采用等效单共振群方法,并对共振核素进行分组,只对每组的代表性核素进行固定源方程求解。基于上述方法,开发了HNET共振计算模块,并针对典型基准例题进行分析验证。数值结果表明:优化后的子群方法能在保证计算效率的前提下,具有较高的计算精度。To enable the high-fidelity neutron transport program HNET to realize high-efficiency and accurate resonance calculation,the subgroup resonance calculation method was studied and optimized on the basis of the HDF5 format multigroup library that we developed.The Pade approximation method improved by the adjusted fitting point method was used to calculate subgroup parameters,which ensured the accuracy of subgroup parameters.Solving the problem of the frequent calling of the neutron transport solver by the traditional subgroup method was necessary to improve computational efficiency.In this study,the equivalent one-resonance group method was adopted.Resonant nuclides were divided into several categories,and only the representative nuclides of each group were solved by the fixed source equation.The resonance calculation module of HNET was developed on the basis of the above method.Moreover,the proposed method was verified by analyzing typical benchmark problems.The results indicated that on the premise of ensuring computational efficiency,the optimized subgroup method has high computational accuracy.

关 键 词：共振自屏计算 子群方法优化 子群参数 子群固定源方程 帕德近似法 等效单共振群方法 Bondarenko迭代方法 

分 类 号：TL32[核科学技术—核技术及应用]