快堆全堆芯热工流体子通道并行模拟技术研究  

Research on Parallel Sub-channel Simulation of Full-core Thermal Fluid of Fast Reactor

作　　者：卢旭 蔡银宇 董玲玉 刘天才[2] 杨文[2] 胡长军[1] LU Xu;CAI Yinyu;DONG Lingyu;LIU Tiancai;YANG Wen;HU Changjun(School of Computer and Communication Engineering,University of Science and Technology Beijing,Beijing 100083,China;Division of Reactor Engineering Technology Research,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]北京科技大学计算机与通信工程学院,北京100083 [2]中国原子能科学研究院反应堆工程技术研究所,北京102413

出　　处：《原子能科学技术》2021年第9期1547-1558,共12页Atomic Energy Science and Technology

基　　金：国家重点研发计划重点专项(2017YFB0202303,2017YFB0202300)。

摘　　要：采用简化堆芯模型的传统子通道模拟计算结果难以精确反映堆芯的真实运行状况,利用高性能计算技术进行全堆芯精确到每个真实流道的子通道模拟计算成为研究热点。本文抽象描述了快堆堆芯的基础几何结构,在此基础上提出了一种全堆芯子通道建模方法和一种自适应的并行任务划分方法。设计了广度优先划分算法和层次划分算法,实现了全堆芯子通道任意个数求解域的划分,自适应地映射到不同个数的计算核上,从而可利用PC、集群、超算等不同规模的计算资源开展全堆并行模拟。使用针对快堆模拟修改后的子通道模拟软件CTF进行验证,证明了建模方法对于快堆子通道模拟是有效的。基于本文方法在曙光先进计算服务平台上使用两种不同网格规模的算例进行了测试,两组测试最低并行效率在33.02%以上,证明了本文方法的有效性和可用性。description,a full-core sub-channel modeling method and an adaptive parallel task division method were proposed.The breadth-first division algorithm and the hierarchical division algorithm were designed to realize the division of any number of solution domains of the full-core sub-channels.The division results adaptively mapped to different numbers of computing cores so that computing resources of different scales such as PCs,clusters and supercomputing machines could be used to carry out parallel simulations of the full-core.The sub-channel simulation software CTF,which was modified for fast reactor simulation,was used to verify the effectiveness of the modeling method for fast reactor sub-channel simulation.Based on the test on the Sugon advanced computing service platform under two different grid-scale examples,the minimum parallel efficiency of the two test sets is over 33.02%,which proves the effectiveness and availability of the proposed method.

关 键 词：数值模拟 堆芯建模 并行任务划分 热工流体子通道模拟 快堆 

分 类 号：TL339[核科学技术—核技术及应用]