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对德尔塔巴流量计在先进堆芯冷却机组试验台架(ACME)破口分离和测量系统及非能动堆芯冷却系统中的微差压关键流量测量技术进行分析,并对应用效果进行了评估。通过改进德尔塔巴流量计的引压结构,证明流量计可以工作在常压微差压的测量工况下,水流量计零点偏移可维持在0.005 kPa以内。通过与超声波流量计的精度对比测试,证明德尔塔巴流量计在破口分离和测量系统中可获得较好的测量效果。在非能动堆芯冷却系统(PXS)中,主要对德尔塔巴流量计在小流量下的测量技术进行了研究,通过与超声波流量计的精度对比测试,证明德尔塔巴流量计在其计算书标明的最小可测流量下仍具备一定的测量能力,运行经验表明其测量小流量的能力最终受差压变送器零点偏移现象所决定。
The Deltabar flowmeter was analyzed in the core cooling unit test stand (ACME) breaking separation and measuring system and the micro-differential pressure critical flow measurement technology in the passive core cooling system, and the application effect was evaluated . By improving the pressure structure of Delta Tabar flowmeter, it is proved that the flowmeter can work under atmospheric pressure and differential pressure measurement conditions, and the zero offset of water flowmeter can be kept within 0.005 kPa. By comparing with the accuracy of the ultrasonic flowmeter, the Delta Tabar flowmeter is proved to be able to obtain good measurement results in the breakage and measurement system. In the passive core cooling system (PXS), we mainly study on the measurement technology of Delta Tabar flowmeter at low flow rate. By comparing with the accuracy of ultrasonic flowmeter, we prove that Delta Tabar flowmeter The minimum measurable flow rate indicated still has certain measuring ability, and the operation experience shows that its capability of measuring small flow rate is ultimately determined by the zero shift of differential pressure transmitter.