广谱系组件计算程序开发  

Development of Computing Code for Full Spectrum Assembly

作　　者：张晋超 张乾 赵强[1] 邹航 于嘉蕾 武世伏 陈莹 Zhang Jinchao;Zhang Qian;Zhao Qiang;Zou Hang;Yu Jialei;Wu Shifu;Chen Ying(College of Nuclear Science and Technology,Harbin Engineering University,Harbin,150001,China;School of Physics,Zhejiang University,Hangzhou,310030,China;Key Laboratory of Nuclear Data,China Institute of Atomic Energy,Beijing,102413,China)

机构地区：[1]哈尔滨工程大学核科学与技术学院,哈尔滨150001 [2]浙江大学物理学院,杭州310030 [3]中国原子能科学研究院核数据重点实验室,北京102413

出　　处：《核动力工程》2024年第5期19-25,共7页Nuclear Power Engineering

基　　金：国家自然科学基金(12105063);中核集团“青年英才”项目。

摘　　要：为解决先进组件设计中存在的多样几何设计问题和使用慢化材料引入的复杂能谱问题,以进一步提升组件程序设计能力,本文基于非结构网格,设计了基于2164群结构的子群共振计算与特征线输运计算的组合策略,并完成了程序开发。程序应用了高效多核素共振干涉方法、散射源移位算法和千群级别的图形处理器(GPU)特征线并行方案以保证计算效率。对不同能谱、不同几何特征的先进组件设计的验证结果表明:与蒙特卡洛基准解相比,对于快谱组件问题,特征值偏差均低于72pcm(1pcm=10-5);对于含慢化材料的快谱组件问题,特征值偏差均低于132pcm。因此,本文设计的计算方案能够处理具有复杂几何和复杂能谱的组件问题。In order to address the issues caused by the diverse geometric designs and complex energy spectrum problems introduced by the use of moderator materials in advanced assembly designs,and to further enhance the design capability of the assembly code,this paper designs a combination strategy and develops a corresponding code based on unstructured mesh.The strategy combines the subgroup method,which is based on a group structure including 2164 groups,with the method of characteristic transport.To ensure computational efficiency,the code employs the efficient multi-nuclide resonance interference method,offset algorithm for scattering source and parallel scheme of graphics processing unit(GPU)characteristics at thousand-group level.Advanced assembly designs with different energy spectra and geometric features are selected to validate the proposed method.The results indicate that,compared to the Monte Carlo reference,the deviations in eigenvalue are within 72pcm(1pcm=10^(-5))for problems with fast spectra,and within 132pcm for problems utilizing moderators.In conclusion,the calculation scheme proposed in this paper can handle assembly problems characterized by complex geometry and complex energy spectrum.

关 键 词：广谱 组件计算 共振计算 特征线方法(MOC) 图形处理器(GPU) 

分 类 号：TL329[核科学技术—核技术及应用]