基于RELAP5的典型压水堆再淹没壁面蒸汽对流换热模型研究  

Research on Wall-to-Vapor Convective Heat Transfer Model in Reflooding Phase of Typical PWR Based on RELAP5

作　　者：吕莉[1,2] 于涛[1] 余红星[2] 吴丹[2] 谢金森[1] 彭欢欢[2] 

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]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》2015年第2期42-45,共4页Nuclear Power Engineering

基　　金：核反应堆系统设计技术重点实验室基金资助项目(2014YSY01)

摘　　要：基于FLECHT SEASET再淹没实验,评价RELAP5程序再淹没模块的合理性。研究表明,现有的RELAP5程序在模拟再淹没实验低流速工况时,低估了燃料包壳的峰值温度。结合典型压水堆再淹没过程的特点,考虑蒸汽流动状态和棒束结构的影响,对壁面蒸汽对流换热模型进行修改,建立适用于典型压水堆再淹没过程的壁面蒸汽对流换热新模型。改进前后程序对包壳峰值温度的计算结果对比,验证了新模型的合理性。This paper evaluates the rationality of RELAP5 reflood models based on the reflooding experiments FLECHT SEASET. The calculated results show that the current version of RELAP5 underestimates the peak clad temperature when simulating the low flooding rate test. Combined the characteristics of the reflooding phase of typical PWR and considered the vapor flow state and rod bundle configuration effects, the wall-to-vapor convective heat transfer model is modified. A new wall-to-vapor convective heat transfer model is established for the simulation of the typical PWR reflooding phase. Through the validation of this new model by comparing the calculation results of peak clad temperature from original code and modified code, it can be concluded that the new model is reasonable.

关 键 词：RELAP5 再淹没 壁面蒸汽对流换热 蒸汽流动状态 棒束结构 

分 类 号：TL333[核科学技术—核技术及应用]