燃料元件多物理场耦合分析平台MCAT开发及初步验证  

Development and Preliminary Verification of MCAT Platform for Fuel Element Multi-physics Coupling Analysis

作　　者：齐飞鹏 刘振海[1] 尹春雨[1] 罗剑 刘勇[1] 钱立波[1] 周毅[1] 王浩煜 陈平[1] 李权[1] Qi Feipeng;Liu Zhenhai;Yin Chunyu;Luo Jian;Liu Yong;Qian Libo;Zhou Yi;Wang Haoyu;Chen Ping;Li Quan(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213

出　　处：《核动力工程》2024年第3期28-36,共9页Nuclear Power Engineering

摘　　要：为进一步提高燃料性能预测精度、拓展燃料分析工具适用范围。本文针对典型棒状燃料元件,基于商用有限元分析程序COMSOL、系统安全分析程序ARSAC以及蒙特卡罗燃耗计算程序RMC,搭建了燃料元件多物理场耦合分析平台MCAT,实现了燃料模块、热工水力模块及中子物理模块的双向耦合。耦合平台采用模块化设计思想,利用中间数据接口管理耦合参数并明确各模块的“边界”,借助各模块的输入/输出文本文件实现耦合参数的更新与反馈,避免了对已有程序进行源码级修改。采用非对称Picard迭代算法实现模块间的双向耦合,将物理和热工模块看作黑盒子程序,在燃料热力学求解过程中依次调用RMC和ARSAC执行计算并交换数据,反复迭代直到收敛。本文从模块、接口及综合预测结果等方面对MCAT进行初步验证,结果表明MCAT能够准确预测燃料元件内功率、温度、结构变形及冷却剂状态等参数分布,表明MCAT平台在模块开发、耦合流程搭建及编码实现等方面的正确性。In order to further improve the prediction accuracy of fuel performance and expand the application scope of fuel analysis tools,and based on the commercial finite element analysis code COMSOL,the system safety analysis code ARSAC and the Monte Carlo burnup calculation code RMC,a multi-physical field coupling analysis platform MCAT for typical rod fuel elements is established,which realizes the bidirectional coupling of fuel module,thermal hydraulic module and neutron physics module.The concept of modular designe is adopted for the coupling platform,the intermediate data interface is used to manage the coupling parameters and define the"boundary"of each module,and the updating and feedback of the coupling parameters are realized with the input/output text files of each module,thus avoiding the source code level modification of the existing codes.Asymmetric Picard iterative algorithm is used to realize bidirectional coupling between modules,and the physical and thermal modules are regarded as black box codes.In the process of solving fuel thermodynamics,RMC and ARSAC are called in turn to perform calculations and exchange data,and iteration is repeated until convergence.In this paper,MCAT is preliminarily verified from the aspects of module,interface and comprehensive prediction results.

关 键 词：燃料性能分析 多物理场耦合 中子物理 热工水力 Picard迭代 

分 类 号：TL352[核科学技术—核技术及应用]