Abstract The purpose of this study is to extend a method of power profile reconstruction based upon Cerenkov radiation measurements outside of a reactor core to provide information about the 3D power profile. Multiple simulated viewpoints above a coolant channel in a TRIGA reactor are used to estimate the axial tilt in the power density in the surrounding pins. The ability to produce a map of the axial flux tilts throughout the core is demonstrated. The presence of control rods inserted from the top of the core causes a downwards tilt throughout the reactor. Various reactor states are analyzed to demonstrate the ability of the method to provide information about changes in the axial flux tilt by comparing a perturbed state to a baseline.

中文翻译：

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使用切伦科夫辐射重建三维反应堆功率剖面

摘要 本研究的目的是扩展基于反应堆堆芯外切伦科夫辐射测量的功率分布重建方法，以提供有关 3D 功率分布的信息。TRIGA 反应堆中冷却剂通道上方的多个模拟视点用于估计周围引脚中功率密度的轴向倾斜。展示了生成整个磁芯的轴向通量倾斜图的能力。从堆芯顶部插入的控制棒的存在导致整个反应堆向下倾斜。分析各种反应器状态以证明该方法通过将扰动状态与基线进行比较来提供有关轴向通量倾斜变化的信息的能力。