Abstract The proposed Canadian SCWR is based on the concept of the CANDU reactor. However, the dynamic characteristics of the SCWR significantly differ from the CANDU reactor because of the special heat transfer phenomenon of the supercritical water in the fuel bundle. Thus, it is important to design a control system to maintain the SCWR operating at the required operating point when it is subjected to disturbances. The transient CFD simulations of the heated channels in a Canadian SCWR are conducted in order to obtain the dynamic relationship between the inputs and outputs of the SCWR. Then, the linear dynamic control models are constructed by the system identification technique based on the dynamic relationship between the inputs and outputs obtained from the CFD simulations. The linear dynamic models are validated using the results from the full scale non-linear CFD simulations. Based on the linear dynamic models, a closed-loop control system, which consists two PID controllers, is designed. The performance evaluation of the proposed control system is also carried in this work.

中文翻译：

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加拿大超临界水堆加热通道的动态模型和控制系统设计

摘要 加拿大提出的 SCWR 是基于 CANDU 反应堆的概念。然而，由于燃料束中超临界水的特殊传热现象，超临界水堆的动态特性与坎杜反应堆有显着差异。因此，设计一个控制系统以在受到干扰时保持 SCWR 运行在所需的工作点是很重要的。对加拿大 SCWR 中的加热通道进行瞬态 CFD 模拟，以获得 SCWR 输入和输出之间的动态关系。然后，基于从 CFD 模拟获得的输入和输出之间的动态关系，通过系统辨识技术构建线性动态控制模型。使用全尺寸非线性 CFD 模拟的结果验证线性动态模型。基于线性动态模型，设计了一个由两个PID控制器组成的闭环控制系统。所提出的控制系统的性能评估也在这项工作中进行。