自然循环的余热排出系统的分析

Analysis for residual heat removal system with natural circulation

采用自然循环的余热排出系统是一种被动安全的系统。用一维流体动力学模型分析了具有三重自然循环回路的余热排出系统的余热排出过程，给出过程各参数的变化。分析结果表明：在余热排出过程中，反应堆冷却剂的温度和压力均存在一个最大值；这时的空冷器传热功率也达到最大值，这个最大值可以反映余热系统排热能力。

The residual heat removal system with natural circulation is a passive safety system. The residual heat removal process for a residual heat removal system with threefold natural circulation loops is analyzed with an one dimensional hydrodynamic model, and the change of several parameters of this system is given. The analyzed result shows that in the residual heat removal process, there is a maximum for temperature in primary coolant and there is a maximum for pressure as well. In this time, the heat power transferred by aircooler reach's to a maximum, which can represent the removing heat capacity of this system.