压水堆弹棒事故是反应性事故中最严重的事故,它和大破口失水事故一样,都属于极限事故。尽管这种事故的发生概率比较小,但其研究成果将直接用于控制棒运行方式的选择上,并指导反应堆的安全运行.本文是用点堆动力学模型对典型的压水堆进行弹捧事故分析.由于整个事故过程所需时间很短,我们采用了部分绝热近似.分析结果表明:这种方法是偏于保守的,计算出来的功率峰要比实测数值高一些. PWR slug accidents are the most serious accidents in reactive accidents, which are the same as extreme flood accidents. Although the probability of such accidents is relatively small, the research results will be directly used to control the choice of operating mode and guide the safe operation of the reactor.In this paper, we use the point reactor dynamics model to model the typical PWR Due to the short time required for the entire accident process, we used a partial adiabatic approximation. The analysis results show that this method is conservative and the calculated peak power is higher than the measured value.