ABSTRACT Suppressing the kernel migration rates under normal operation condition is quite important from the viewpoint of the fuel integrity for High-Temperature Gas-cooled Reactors. It depends on both the fuel temperature and the fuel temperature gradient. The presence of the ideal axial power distribution to minimize the maximum kernel migration rate allows us to improve the efficiency of design work. Therefore, we propose a new method based on Lagrange multiplier method in consideration of thermohydraulic design in order to obtain the ideal axial power distribution to minimize the maximum kernel migration rate. For one of the existing conceptual designs performed by JAEA, the maximum kernel migration rate for the power distribution to minimize the maximum kernel migration rate proposed in this study is lower by approximately 10% than that for the power distribution as a conventional design target to minimize the maximum fuel temperature.

中文翻译：

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推导理想功率分布以最小化 pin-in-block 型 HTGR 核设计的最大内核迁移率

摘要 从高温气冷堆燃料完整性的角度来看，在正常运行条件下抑制核迁移率是非常重要的。它取决于燃料温度和燃料温度梯度。理想轴向功率分布的存在使最大内核迁移率最小化，使我们能够提高设计工作的效率。因此，考虑到热工水力设计，我们提出了一种基于拉格朗日乘子法的新方法，以获得理想的轴向功率分布，以最小化最大核迁移率。对于 JAEA 进行的现有概念设计之一，