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.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
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)
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
RELAP5 code
Reflooding
Wall-to-vapor convective heat transfer
Vapor flow state
Rod bundle configuration
