用RELAP5程序分析压力容器喷放过程

Using Relap5 to Analyze an Accidental Depressurization Experiment

压力容器实验；ＲＥＬＡＰ５；热工水力数值模拟摘 要：利用 Ｉｄａｈｏ Ｎａｔｉｏｎａｌ Ｅｎｇｉｎｅｅｒｉｎｇ Ｌａｂｏｒａｔｏｒｙ（ＩＮＥＬ）开发的 ＲＥＬＡＰＳ程序模拟压力容器事故卸压实验的热工水力过程。ＲＥＬＡＰ５程序的计算结果与实验数据相比，空泡份额变化与实验一致，压力和温度偏低，剩余水的质量偏大。程序预测的卸压过程比实验测量偏快．经过比较，认为ＲＥＬＡＰＳ程序可以对一般受压流体失压瞬态问题进行预测估算。

The code of RELAP5 is used to analyze the behavior of an accidental depressuriza- tion experiment.A comparison between the calculated results and the experimental data shows a good match with the prediction of void fraction in the pressure vessel, underprediction of the pressure and temperature and overprediction of the remained water mass in vessel. As a whole, RELAP5 exaggerates depressurization speed of the pressure vessel.