点堆模型已被广泛用来处理反应堆动态问题。用修正龙格-库塔方法求解中子动力学方程时,准确度高,但时间步长要选择得相当小。本文提出的计算方法,允许选用较大的时间步长,在满足一定精度的条件下,节省了计算时间。这种方法,既适用于弹棒事故计算,又适用于有实时要求的某些过程计算。 Point heap models have been widely used to deal with reactor dynamics. When using the modified Runge-Kutta method to solve the neutron kinetic equation, the accuracy is high, but the time step should be chosen quite small. The calculation method proposed in this paper allows the choice of a larger time step, which saves computation time while satisfying a certain degree of accuracy. This method is applicable to both the calculation of the bomb accident and the calculation of some processes that have real-time requirements.