摘要
基于随机抽样方法研究核燃料裂变气体释放(FGR)机理模型不确定性,分析了扩散系数、重溶参数、晶粒尺寸等模型参数对计算结果的影响。42个试验算例分析结果表明,模型参数不确定性引起的FGR计算标准差约为均值的30%~60%,是计算结果与试验测量值之间偏差的主要来源,其中晶内气体扩散系数和重溶参数的敏感性最高。不确定性和敏感性分析结果可用于FGR机理模型的改进。
Uncertainty of the nuclear fuel fission gas release(FGR)mechanism model is studied based on the random sampling method,and the effect of model parameters such as diffusion coefficients,resolution parameter,and grain size on the model calculation results is analyzed.The analysis results of 42 experimental cases indicate that the sample standard deviation of FGR caused by the uncertainty of the model parameter is about 30%to 60%of the mean value,which is the primary cause of the deviation between the results and the measurements,and the most sensitive parameters are the intra-granular diffusion coefficient and the resolution parameter.The uncertainty and sensitivity analysis results can be used to improve the FGR mechanism model.
作者
潘昕怿
王业辉
陈浩
兰兵
张盼
依岩
PAN Xin-yi;WANG Ye-hui;CHEN Hao;LAN Bing;ZHANG Pan;YI Yan(Nuclear and Radiation Safety Center MEE,Beijing 100082,China;Harbin Engineering University,Harbin 150001,China)
出处
《核电子学与探测技术》
CAS
北大核心
2022年第3期521-526,共6页
Nuclear Electronics & Detection Technology
基金
国家科技重大专项(2019ZX06005001)资助。
关键词
核燃料
裂变气体释放
模型参数
不确定性
Nuclear Fuel
Fission Gas Release
Model Parameter
Uncertainty