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本文建立了研究沸水堆堆芯核耦合密度波不稳定性的多变量数学模型,应用现代频域控制理论中的多变量特征轨迹法研究了沸水堆通道不稳定性问题,编制了NUCTHIA程序,利用实验结果校验,以及与单变量分析方法相互对照进行了模型验证。应用NUCTHIA程序研究了系统主要参数的变化对堆芯稳定性的影响,所得结论与实验结果相一致。
In this paper, we establish a multivariable mathematical model to study wave instability of boiling water reactor core-coupled density wave. The multi-variable eigen-locus method in modern frequency domain control theory is used to study the channel instability of boiling water reactor. NUCTHIA program is developed. Validation of experimental results, and validation of the model against univariate analysis. The application of NUCTHIA program was used to study the influence of the main parameters of the system on the stability of the core. The obtained conclusion is consistent with the experimental results.