大破口失水事故过程中燃料包壳鼓胀爆破模拟  

The Simulation of Cladding Ballooning and Burst During LBLOCA

作　　者：韩智杰[1] 何晓军[1] 刁均辉[1] 季松涛[1] HAN Zhijie;HE Xiaojun;DIAO Junhui;JI Songtao(China Institute of Atomic Energy,Beijing,102413 China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《科技创新导报》2020年第27期78-81,共4页Science and Technology Innovation Herald

摘　　要：为了模拟大破口失水事故中包壳鼓胀爆破大变形过程,利用圆筒厚壳应力计算公式,结合包壳材料塑性应变曲线及“流动法则”,开发包壳大变形计算模块。通过耦合燃料元件瞬态性能分析程序FTPAC(Fuel Transient Performance Analysis Code),考虑了包壳变形对间隙传热及包壳温度的影响,完成事故工况下包壳鼓胀失效行为模拟。采用燃料试验数据对程序计算结果进行验证,结果表明包壳鼓胀大变形计算模块能够较好地预测包壳变形及失效过程,计算结果合理可信。In order to simulate the cladding ballooning and burst during Loss of Coolant Accident,the cladding large deformation model is developed with the expression of local stress used for thick walled cylinder and the basic equation of plastic strain and Prandtl-Reuss flow rule for cladding material.By applying this model to FTPAC(Fuel Transient Performance Analysis Code)considering the effect of cladding geometry change on gap conductance and cladding temperature,the capability of simulating cladding deformation under accident condition is obtained.The verification by fuel test data shows that cladding large deformation model gives reasonable results for cladding ballooning and burst.

关 键 词：包壳鼓胀 失水事故 燃料性能 大变形 

分 类 号：TL364.4[核科学技术—核技术及应用]