反应性实时测量建模及仿真实现

Modeling and simulation for real-time measurement of reactivity

从6组缓发中子点堆动力学方程出发,采用逆动态法建立核电站全范围仿真机反应性实时测量的数学模型,并编程实现该模型.利用点堆动态方程在无外加中子源、反应性小阶跃变化时的解对该方法进行验证,计算结果与实际值相吻合;将从仿真机采集到的数据用于反应性的实时计算,结果表明该方法能够正确反映反应性的变化趋势,可以在仿真机上使用该方法对反应性进行实时监测,为培训操作人员提供帮助.

Based on dynamic equations of the point-reactor with six-group delayed neutrons,a mathematical model for the real-time measurement of reactivity of a full-range simulator in power plant was established using inverse dynamic method.Computer program was developed to perform real-time measurement of reactivity.The effectiveness of the method was verified using the solution of the dynamic equations with the conditions that no external neutron sources existed and the reactivity had only small step changes.The calculating result was in good agreement with the observed data.In addition,we use data obtained from the simulator to calculate the real-time reactivity.The results show that this method can truly describe the trend of reactivity changes.Therefore,we can measure the real-time reactivity with the aid of simulator and offer assistance to operators training.