摘要
以典型压水堆燃料组件2×2棒束结构为研究对象,建立了含定位格架和不含定位格架的棒束三维模型,基于半隐式运动粒子(MPS)算法对严重事故背景下棒束结构的熔化行为进行了数值模拟,分析了定位格架对棒束熔化过程中流道堵塞进程的影响。结果表明:MPS算法能够较好地模拟棒束结构熔化行为,定位格架会加快堆芯的熔化进程和冷却流道的堵塞速度,本文研究结果有利于严重事故下堆芯熔化模型的优化改进。
Taking the 2×2 rod bundle structure of typical pressurized water reactor fuel assembly as the research object,the three-dimensional model of rod bundle with and without positioning grid is established.Based on the semi-implicit moving particle algorithm(MPS),the melting behavior of the rod bundle structure under the background of serious accidents is numerically simulated,and the influence of the positioning grid on the flow channel blocking process in the rod bundle melting process is analyzed.The results show that the MPS algorithm can better simulate the melting behavior of the rod bundle structure,and the positioning grid will speed up the melting process of the core and the blocking speed of the cooling channel.The research results in this paper are beneficial to the optimization and improvement of the core melting model under severe accident.
作者
何孟轩
傅晟威
余航
He Mengxuan;Fu Shengwei;Yu Hang(College of Nuclear Science and Technology,Naval University of Engineering,Wuhan,430033,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2022年第5期147-153,共7页
Nuclear Power Engineering
