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首页> 外文会议>International conference on nuclear engineering >PRELIMINARY EXPERIMENTAL STUDY ON EROSION-CORROSION BEHAVIOR OF SECOND LOOP PIPELINE IN NUCLEAR POWER PLANT WITH VAPOR LIQUID TWO PHASE FLOW
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PRELIMINARY EXPERIMENTAL STUDY ON EROSION-CORROSION BEHAVIOR OF SECOND LOOP PIPELINE IN NUCLEAR POWER PLANT WITH VAPOR LIQUID TWO PHASE FLOW

机译：汽液两相流核电厂二回路管道腐蚀行为的初步试验研究

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摘要

Under the conditions of the actual operation of the nuclear power plant, especially in the drainage system of the heaters, water recycling system, and condensate pump recirculation system, there is a sudden pressure drop after the control valve in the pipeline, which will lead to serious vapor-liquid two-phase flow. Vapor liquid two phase flow can lead to accelerated corrosion in the pipeline. In order to study the influence of vapor liquid two phase flow on the accelerated corrosion of the pipeline, an experimental facility for simulating the operating conditions of the Second Loop was designed and completed. The experimental facility comprises a pressure regulator, high pressure water tank, circulating pump, power heater, low pressure water tank, condensing and cooling system, instrumentation and data acquisition system. The flow characteristics and the corrosion characteristics of the inner wall of the pipe in the flow channel after the control value were studied in the experiments. The flow characteristics include the distribution of water and vapor temperature, pressure drop distribution and void fraction along the flow channel. In the meanwhile, the corrosion rate and surface characteristics of inner wall at different locations were also studied by CCD and SEM. In addition, the influences of pipe material and pipeline geometry on the erosion-corrosion were also studied in the experiments.
机译：在核电站实际运行的条件下，特别是在加热器的排水系统，水循环系统和冷凝水泵再循环系统中，管道中的控制阀后会突然出现压降，这将导致汽液两相流严重。汽液两相流可导致管道中加速的腐蚀。为了研究汽液两相流对管道加速腐蚀的影响，设计并完成了模拟第二环路工作条件的实验设备。实验设施包括压力调节器，高压水箱，循环泵，功率加热器，低压水箱，冷凝和冷却系统，仪器和数据采集系统。实验研究了控制值后管道内壁在流动通道中的流动特性和腐蚀特性。流动特性包括沿流动通道的水和蒸气温度分布，压降分布和空隙率。同时，还通过CCD和SEM研究了不同位置内壁的腐蚀速率和表面特性。此外，在实验中还研究了管道材料和管道几何形状对冲蚀腐蚀的影响。

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