包壳瞬态氧化过程中的相变磁滞现象模拟  

A Simulation of Hysteresis Phenomenon during Cladding Transient Oxidation

作　　者：何晓强[1] 余红星[1] 江光明[1] 党高健[1] 吴丹[1] 张渝[1] 

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610041

出　　处：《核动力工程》2016年第2期70-73,共4页Nuclear Power Engineering

摘　　要：利用基于扩散方程的包壳氧化模型,对与氧化锆(Zr O2)的单斜相-四方相共存相关的相变磁滞现象进行了分析。得到的主要结论有:该模型能较好地模拟包壳瞬态氧化时的相变磁滞现象;当升温或降温速率较大时,相变磁滞现象较明显;该模型比抛物线型公式能更好地预测美国橡树岭国立实验室(ORNL)开展的假想失水事故(LOCA)氧化实验。The hysteresis phenomenon related to the coexistence of monoclinic-tetragonal phases of zirconia has been analyzed by a developed cladding oxidation model based on diffusion equations. Main findings are summarized as follows： the model can well simulate the hysteresis phenomenon during cladding transient oxidation; when the heating or cooling rates are high, the hysteresis phenomenon is significant; and the model can give a much better prediction of the hypothetical loss-of-coolant accident （LOCA） oxidation experiments in Oak Ridge National Laboratory （ORNL） than the parabolic rate correlation.

关 键 词：相变磁滞 包壳氧化 扩散方程 

分 类 号：TL375[核科学技术—核技术及应用]