基于RELAP5的高温棒束通道再淹没数值模拟研究

发布时间：2018-06-01 23:09

本文选题：再淹没 + RELAP　；参考：《核科学与工程》2017年05期

【摘要】：基于ABB Atom 3×3棒束再淹没实验,运用RELAP5建立其实验装置的定流量再淹没计算模型,通过与实验结果做比对验证模拟的有效性,研究在高、低两种注水流量下从底部再淹没高温棒束通道时的不同骤冷现象,分析期间的流动形态、传热特性,液位进程,先驱冷却效果差异等。模拟结果表明:低流量下主液位落后于骤冷前沿,高流量下骤冷前沿明显落后于主液位;通过对比发现在高流量下的高液位为高温壁面带来更强的先驱冷却,使壁面温度更快的降到再湿温度,而低流量下几乎匀速上升的液位变化进程对前沿下游的高温壁面冷却较慢,需要更长的时间才能降到再湿温度。这些分析将为研究此模型下的重力注水打下坚实的基础。
[Abstract]:Based on the experiment of ABB Atom 3 脳 3 rod beam submergence, the calculation model of constant flow reflooding is established by using RELAP5. The validity of the simulation is verified by comparing the experimental results with the experimental results. Under low water injection flow rate, different quench phenomena occurred when the channel was submerged from the bottom of the high temperature rod bundle, and the flow pattern, heat transfer characteristics, liquid level process and the difference of precursor cooling effect during the period were analyzed. The simulation results show that the main liquid level lags behind the quenching front at low flow rate, and the quenching front obviously lags behind the main liquid level at high flow rate, and it is found that the high liquid level at high flow rate brings stronger pioneer cooling to the wall at high temperature. The temperature of the wall decreases to the wetting temperature more quickly, while the process of the level change of the liquid level increases almost uniformly under the low flow rate, and the cooling of the wall surface of the front and downstream high temperature is slower, and it takes longer time to reduce to the rewetting temperature. These analyses will lay a solid foundation for the study of gravity injection under this model.
【作者单位】：上海交通大学机械与动力工程学院;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;
【基金】：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基金资助(LRSDT2017402)
【分类号】：TL364.4

【相似文献】