中文摘要：

AP1000核电系统属于第3代核电堆型,在我国核电发展中有望成为主力堆型.该堆型采用了非能动式堆芯冷却系统,全压补水箱（CMT）是其主要设备之一.针对全压补水箱补水系统的数学建模与数值模拟,能够对其可靠性进行验证,亦能够对正常及事故工况下全压堆芯补水系统的瞬态响应特性作出预测与评价.基于简化的全压堆芯补水箱补水系统,建立了双罐体4区非平衡模型,并运用Simulink动态仿真的方法进行数值模拟,得到了系统内压力、液位等主要参数随时间的变化情况.仿真结果与文献中类似模型的试验、仿真结果参数变化规律一致,能够为CMT补水系统瞬态分析提供理论依据.

英文摘要：

AP1000 nuclear power system belongs to the third generation nuclear power reactor in China＇s nuclear power development,which is expected to become the main type. The reactor core cooling system is a passive system,and the Core Makeup Tank（ CMT） is one of the main types of equipment. Based on mathematical modeling and numerical simulation of the full pressure CMT,the reliability of CMT can be verified,and the transient response of the system under normal and accident conditions can also be predicted and evaluated. For a simplified full pressure CMT system,a model consisting of 2 tanks and 4 regions is established,and by using Simulink dynamic simulation method,main parameters of the system,such as the inner pressure and liquid level are simulated. The simulation results are consistent with the similar model experiment and simulation results,which provides a theoretical basis for the transient analysis of CMT system.