ADG除氧器启动期间两侧温差较大的原因和解决方案

Reasons and Solutions for Temperature Difference between Two Sides of ADG Deaerator during Start-up

在方家山核电工程在机组热态调试的启动阶段,发现给水除氧器系统(ADG)除氧器两端温差较大,主控室显示两端温度相差近40℃。经过详细分析,确认导致温差大的原因并提出多种解决方案,经多方论证对比,最终采取增加除氧器再循环泵的方案,成功地解决了启动阶段温差问题。

In the hot commissioning of Fangjiashan nuclear power project, a relatively large temperature difference was found between the two ends of the deaerator in the feedwater deaerator system(ADG). Displays in the main control room show that the temperature difference was nearly 40 degrees. After a detailed analysis, this paper found the cause for the temperature difference and put forward a variety of solutions. Through argumentation comparison, a deaerator recirculation pump was added, which successfully solved the problem in the start-up phase.