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利用三代核电非能动余热排出实验装置(ESPRIT)对华龙1号反应堆的二次侧非能动余热排出系统(PRS)的自然循环特性进行了瞬态实验研究。实验在原型工况、提升功率工况和提升阻力工况下开展。通过本试验研究,获得了华龙1号反应堆核电厂全厂断电事故工况下,PRS系统的响应特性和运行能力。实验数据证实,PRS系统事故冷却水箱(水池)设计容积满足系统启动后72 h的排热要求。功率提升6%后,水池依然有足够的冷却能力。原型阻力提升50%后,系统压力始终高于原型阻力工况。试验过程中一直存在有效的自然循环,在水池作用下,系统温度和压力持续降低。
The natural circulation characteristics of the secondary side passive residual heat removal system (PRS) of Hualong 1 reactor were transiently investigated by using ESPRIT. Experiments in the prototype conditions, enhance power conditions and enhance the resistance conditions. Through this experimental study, the response characteristics and operating capacity of the PRS system were obtained under the conditions of power plant blackout at the entire plant of Hualong No.1 nuclear power plant. The experimental data confirm that the design volume of the PRS system accident cooling water tank (tank) meets the heat release requirement of 72 h after system startup. 6% increase in power, the pool still have enough cooling capacity. Prototype resistance increased by 50%, the system pressure is always higher than the prototype resistance conditions. During the test, there was an effective natural circulation, and the temperature and pressure of the system continued to decrease under the action of the water tank.