基于RELAP5和CTF的西安脉冲堆多尺度耦合瞬态特性研究  

Multi-scale Coupling Transient Characteristics of Xi'an Pulsed Reactor Based on RELAP5 and CTF

作　　者：赵巍 陈立新[1] 刘国栋 张良[1] 杨宁[1] 张信一[1] 田晓艳[1] 孙培伟[3] 袁建新[1] Zhao Wei;Chen Lixin;Liu Guodong;Zhang Liang;Yang Ning;Zhang Xinyi;Tian Xiaoyan;Sun Peiwei;Yuan Jianxin(State Key Laboratory of Intense Pulsed Radiation Simulation and Effect(Northwest Institute of Nuclear Technology),Xi’an,710024,China;Department of Engineering Physics,Tsinghua University,Beijing,100084,China;School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an,710049,China)

机构地区：[1]强脉冲辐射环境模拟与效应国家重点实验室(西北核技术研究所),西安710024 [2]清华大学工程物理系,北京100084 [3]西安交通大学核科学与技术学院,西安710049

出　　处：《核动力工程》2023年第3期59-64,共6页Nuclear Power Engineering

摘　　要：基于系统程序RELAP5和子通道程序CTF,建立了适合于自然循环冷却池式脉冲堆的区域分解多尺度耦合方法和满足不同尺度参数间精确转换的网格映射方法。通过脉冲堆稳态和瞬态工况分析,验证耦合方法正确性和可行性,计算结果表明:所建立的多尺度耦合方法能够应用于自然循环冷却池式脉冲研究堆的耦合分析,其耦合计算结果在准确性方面优于单一系统程序计算结果;2 MW稳态工况下的燃料芯块温度准确性提高约62.50%,脉冲瞬态工况下燃料芯块温度准确性提高约76.71%;同时,耦合计算能够获得高精度、高分辨率的堆芯热工水力分布和瞬态特性。Based on the system code RELAP5 and the sub-channel code CTF,a multi-scale coupling domain decomposition approach for pool pulsed reactor with natural circulation and a grid mapping method that meets the precise conversion between different scale parameters are proposed in this paper.The correctness and feasibility of the coupling method are verified by the analysis of the steady state and transient conditions of the pulsed reactor.The results show that the proposed multi-scale coupling method can be applied to the coupling analysis of the pulsed reactor.The results of coupling calculation are better than those of single system code in accuracy.The accuracy of the fule core temperature is in creased by approximately 62.50%in the 2 MW steadystatecondition and 76,71%under the pulsed transient condition.Meanwhile,the high-precision and high-resolution thermal-hydraulic distribution and transient characteristics of the core can be obtained by coupling calculation.

关 键 词：脉冲堆 区域分解法 多尺度耦合 RELAP5 CTF 

分 类 号：TL99[核科学技术—核技术及应用]