秦山300 MW核反应堆控制棒热态落棒实验数值拟合

Numerical Simulation and Analysis of Control Rod Dropping of Qingshan 300 MW Nuclear Reaction

详细分析了控制棒下落运动的受力情况 ,并建立了相应的数学模型 ,结合秦山核电站30 0MW控制棒热态落棒实验数据 ,对数学模型进行了修正 ,同时对模型中的有关系数进行了拟合。用拟合的系数进行热态落棒数值模拟 ,结果与实验结果吻合很好 ,验证了数学模型的正确性。为控制棒下落的机理分析和数值求解控制棒落棒提供了理论依据和求解方法。

This paper provides a theoretic basis to analyze the mechanism of control rod dropping and a solution method to solve the process of dropping. The authors analyze the effect of different forces acting on the control rod in detail. A mathematical model is built and a program is written to solve the process of downward motion. Finally, the model and relative coefficients of the model are modified according to the experimental data. The modified model can well simulate the process of dropping of the control rod, which gives a powerful proof to the accuracy of the model.