基于关联度理论的锆-4合金包壳堆外EDC试验参数研究  

Outside the Reactor Research on EDC Test Parameters of Zirconium⁃4 Alloy Cladding Based on Correlation Degree Theory

作　　者：丁锡嘉 许倩[1] 郝思佳 胡真 何晓军[1] DING Xijia;XU Qian;HAO Sijia;HU Zhen;HE Xiaojun(Reactor Engineering Technology Research Institute,China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]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：《材料导报》2023年第S02期470-478,共9页Materials Reports

基　　金：中核集团青年英才基金(202382001167543)。

摘　　要：堆外EDC试验是一种能够精确控制各试验参数,模拟RIA工况下锆⁃4合金包壳失效的试验方法。通过试验数据验证的数值模拟计算,分析了柱塞压缩速率、轴向拉伸载荷、包壳管温度、包壳管氢含量等试验参数对包壳管轴向应变ε_(zz)、环向应变ε_(θθ)、包壳管残余应变双轴比ε_(zz)/ε_(θθ)的影响,利用关联度理论计算出以上试验参数对燃料元件PCMI失效影响的重要程度。结果表明:包壳管拉伸载荷、包壳管含氢量、包壳管温度对包壳管环向应力⁃应变曲线的影响明显,柱塞压缩速率对包壳管载荷达峰时间有显著影响。各参数对包壳管失效的影响按程度从大到小依次为轴向拉伸载荷、包壳管含氢量、包壳管温度、柱塞压缩速率。The EDC experiment is a test method that can accurately control various test parameters to simulate the failure of zirconium⁃4 alloy cladding under RIA conditions.Through numerical simulation calculations validated by experimental data,the effects of experimental parameters such as plunger compression rate,axial tensile load,shell tube temperature,and shell tube hydrogen content on the axial strain of the shell tube were analyzed axial strainε_(zz),circumferential strainε_(θθ),biaxial ratio of residual strain in cladding tubesε_(zz)/ε_(θθ),calculate the importance of the above experimental parameters on the failure of fuel element PCMI using the correlation theory.The results show that the tensile load,hydrogen content,and temperature of the cladding tube have a significant impact on the circumferential stress⁃strain curve of the cladding tube.The compression rate of the plunger has a significant impact on the peak time of the cladding tube load.The effects of various parameters on the failure of the cladding tube are in order of degree:axial tensile load,hydrogen content of the cladding tube,temperature of the cladding tube,and plunger compression rate.

关 键 词：锆-4合金包壳 芯块-包壳机械相互作用(PCMI) 残余应变双轴比 EDC试验 关联度理论 

分 类 号：TL341[核科学技术—核技术及应用]