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点堆动力学方程可反映出堆芯中子密度随时间的变化关系,但传统的点堆动力学方程不适用于熔盐堆.这是由于熔盐堆的燃料具有流动性,堆芯产生的缓发中子先驱核随熔盐的流动会影响堆芯中子平衡.本文采用修正的点堆动力学方程,推导出该方程的解析解.利用数值方法对解析解进行验证,结果显示解析解和数值解基本一致.根据解析解推导出熔盐堆周期的表达式,并用数值解进行验证,二者结果基本相符.“,”The point kinetic equation of reactor can reflect the change of neutron density in reactor core with time,but the traditional point reactor kinetic equation is not suitable for molten salt reactor.This is due to the fluidity of the fuel in the molten salt reactor and the delayed neutron precursors generated by the core as the flow of molten salt affects the core neutron balance.In this paper,the modified point kinetic equation is used to derive the analytical solution of the equation.The numerical method is used to verify the analytical solution.The results show that the analytical solution and the numerical solution are basically accordant.According to the analytic solution,the expression of the cycle of the molten salt reactor is deduced and validated by the numerical solution.The results of analytical solution and numerical solution are basically in agreement.