基于CERT试验台架的PCS系统关键影响因素分析

发布时间：2018-09-13 15:08

【摘要】：非能动安全壳冷却系统(Passive Containment Cooling System,PCS)是第三代非能动反应堆的专设安全系统之一,用于在事故情况下导出安全壳内热量。基于非能动安全壳冷却系统综合性能试验台架(Containment safety v Erification via integ Ral Test,CERT),本文研究影响PCS系统冷却效果的关键因素。采用安全壳分析程序针对CERT试验台架进行建模和计算,将计算结果与试验结果进行了对比验证。在此基础上模拟了冷管段双端断裂事故喷放下的试验壳内压力响应,并对壳外冷却水流量、壳外冷却水膜覆盖率、环腔风速等关键参数进行了敏感性分析。结果表明,冷却剂丧失事故(Loss Of Coolant Accident,LOCA)工况下,壳内压力经历两个峰值后逐渐降低,峰值压力0.266 1 MPa。壳外冷却水流量、水膜覆盖率对冷却效果影响显著,二者的降低将造成壳内压力的升高;环腔风速的增大有一定的降压作用。
[Abstract]:The passive containment cooling system (Passive Containment Cooling System,PCS) is one of the special safety systems for the third generation inactive reactor, which is used to derive the heat in the containment in the event of accident. Based on the comprehensive performance test bench (Containment safety v Erification via integ Ral Test,CERT) of passive containment cooling system, the key factors affecting the cooling effect of PCS system are studied in this paper. The containment analysis program was used to model and calculate the CERT test-bed, and the calculated results were compared with the test results. On the basis of this, the pressure response of the test shell caused by the two-end fracture accident spray put down in the cold pipe section is simulated, and the sensitivity analysis of the key parameters such as the cooling water flow rate outside the shell, the film coverage rate of the cooling water outside the shell and the wind speed of the ring cavity are carried out. The results show that under the condition of coolant loss accident (Loss Of Coolant Accident,LOCA), the pressure in the shell decreases gradually after two peaks, and the peak pressure is 0.266 1 MPa.. The cooling water flow rate and the water film coverage rate have a significant effect on the cooling effect. The decrease of both of them will lead to the increase of the pressure in the shell and the increase of the wind speed in the ring cavity can reduce the pressure to a certain extent.
【作者单位】：环境保护部核与辐射安全中心;
【基金】：国家科技重大专项项目(No.2015ZX06002007、No.2013ZX06002001)资助~~
【分类号】：TL364.3

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