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整体性热工水力学试验是验证压水堆核电站安全性的核心技术,针对反应堆主回路循环特性的比例分析是指导整体性试验台架设计的理论依据。基于两相漂移流模型建立反应堆主回路强迫循环和自然循环的控制方程组。应用初始条件对方程无量纲化,得出整体性试验台架模拟原型电站主回路强迫循环向自然循环过渡的相似准则,提出能够模拟原型电站主泵惰转并满足循环过渡相似性要求的试验方法。
Integral thermal hydraulics test is the core technology to verify the safety of PWR nuclear power plant. Proportion analysis of the cyclic characteristics of the main circuit of the reactor is the theoretical basis to guide the design of the integrated test bench. Control equations of forced circulation and natural circulation of main loop of reactor are established based on two-phase drift flow model. Applying the initial conditions, the equations are dimensionless, and the similarity criterion for the transition from forced circulation to natural circulation of the main circuit of the prototype prototype test rig is obtained. The test method that can simulate the main pump idling and meet the similarity of cyclic transition is proposed .