一体化压水堆非能动余热排出系统动态特性仿真

Simulation for the dynamic performance of integrated PWR’s passive residual heat removal system

针对MAX一体化压水堆建立反应堆主要系统及非能动余热排出系统的水力热工计算模型,以电源丧失事故为假想事故,利用该模型对事故过程进行仿真计算。分析结果表明,非能动余热排出系统配合一体化压水堆的高自然循环能力能够在发生电源丧失事故的情况下,明显减轻反应堆一、二回路压力边界的负担,降低堆芯温度,提高反应堆的安全性。

The computing and analytic models are established for integrated pressurized water reactor （PWR） and passive residual heat removal system in one type of integrated nuclear power plant. Using the established mathematic models, the paper analyzes and calculates the transition process of blackout accident in two heat removal modes which are using safety valve and passive residual heat removal system. The calculation results show that, in blackout accident passive residual heat removal system cooperated with the natural circulation capacity of Integrated PWR can alleviate the burden of primary loop and secondary loop＇ s pressure boundary, reduce the temperature of in-core, improve the security of reactor.