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在 ２００ ＭＷ供热堆实验回路（ＨＲＴＬ－２０Ｑ）上，以水为工质，在压力 １． ０～４． ５ ＭＰａ，加 热功率 ２７～１９０ｋＷ，入口欠热度 ５～８０℃，加热段出口质量含汽率小于 ５％的实验参数范围（包 含了２００ＭＷ供热堆参数的运行工况），研究了加热功率对低压、低干度汽水两相自然循环系统 的循环流量、流量相对振幅、流量振荡周期等的影响。结果表明随加热功率的增加流量呈非线 性增加，振荡周期逐渐减小，最大流量相对振幅变化不大，发生流量振荡的冷却剂入口欠热度范 围向大欠热度方向移动。
On the 200 MW Heating Reactor Experimental Loop (HRTL-20Q), water is used as the working fluid at pressure 1. 0 ~ 4. 5 MPa, heating power 27 ~ 190kW, under-heating of inlet 5 ~ 80 ℃, steam content of outlet of heating section is less than 5% (including the operating conditions of 200MW heating reactor parameters) Low-pressure, low-slush two-phase natural circulation system of circulating flow, the relative flow amplitude, flow oscillation period and so on. The results show that the flow rate increases nonlinearly with the increase of heating power, the oscillation period decreases gradually and the relative amplitude of the maximum flow rate does not change much. The range of underheat degree of coolant inlet oscillations moves to a large degree of underheat.