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Studying the Operation of a WER Steam Generator in the Condensing Mode at Different Parameters of Emergency Processes

机译：在紧急过程的不同参数下研究冷凝模式下WER蒸汽发生器的运行

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The article presents the results of the experimental study of heat and mass transfer processes in an N PP steam generator during the operation of passive safety systems of new-generation WER reactor installations. At the GE2M-PG test rig in the Leypunsky Institute for Physics and Power Engineering, two series of experiments corresponding to different stages of the accident were completed. In these experiments, the performance of WER steam generator in the condensing mode with and without the removal of gas-vapor mixture from the "cold" header has been studied. As a result of the first series of experiments, it was found that, for any of the parameters of the emergency process, the steam generator's power does not drop below 80% of the original value. Furthermore, we revealed that the composition and physical properties of gases in the investigated concentration range did not notably affect the processes in the steam generator. In the second series of experiments without removal of noncondensable gases, the influence of parameters of the emergency process on the efficiency of heat transfer in the steam generator operating in the condensing mode was investigated. In order to study the heat transfer processes, we studied the change of the temperature difference between the media of the first and second circuits in our experiments. We found that the value of the temperature difference depends on both the mass of noncondensable gases accumulated in the tube bundle and their accumulation rate. The accumulation rate is determined by the power of the steam generator and the concentration of gases entering the steam generator. As a result of the analysis of experimental data, we obtained the analytical dependence reflecting change in the power of the steam generator operating in the emergency condensing mode.
机译：本文介绍了在新一代WER反应堆装置的被动安全系统运行过程中，N PP蒸汽发生器中传热和传质过程的实验研究结果。在Leypunsky物理与动力工程学院的GE2M-PG测试台上，完成了与事故不同阶段相对应的两个系列实验。在这些实验中，研究了WER蒸汽发生器在冷凝模式下有无从“冷”集管中除去气-蒸气混合物的性能。作为第一批实验的结果，发现对于紧急过程的任何参数，蒸汽发生器的功率都不会下降到原始值的80％以下。此外，我们发现，在所研究的浓度范围内，气体的组成和物理性质不会显着影响蒸汽发生器中的过程。在第二系列实验中，没有去除不可冷凝的气体，研究了紧急过程的参数对以冷凝模式运行的蒸汽发生器中的热传递效率的影响。为了研究传热过程，我们在实验中研究了第一回路和第二回路的介质之间的温差变化。我们发现，温差的值取决于管束中累积的不可冷凝气体的质量及其累积率。累积速率取决于蒸汽发生器的功率和进入蒸汽发生器的气体浓度。作为实验数据分析的结果，我们获得了反映在紧急冷凝模式下运行的蒸汽发生器功率变化的分析依赖性。

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