Abstract The rod drop experiment is an important transient in reactor operation. This study focuses on a comparison between experimental reactor physics data and respective calculation. The rod drop experiment was performed at the VR-1 reactor. A full core 3D model was used to calculate this transient using Serpent2. Additionally, a point kinetic solution is presented. The Serpent results were compared with the experiment and with the point kinetic calculation. Two different nuclear data libraries (ENDF/B-VIII.0, JEFF3.3) were used in the data sensitivity analysis. The Serpent 3D kinetics results were almost identical to the point kinetic equation solution. Experimental data differed in the rod worth. This study shows that the new Serpent dynamic toolkit provides an accurate description of the reactor behavior during this transient. The 3D calculation proved that the detector position during the transient has a direct impact on the measured control rod worth.

中文翻译：

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VR-1 反应堆的棒落瞬态——实验和蛇形瞬态计算分析

摘要 落棒实验是反应堆运行中的一个重要瞬态。本研究侧重于实验反应堆物理数据与各自计算之间的比较。棒落实验在 VR-1 反应器上进行。完整的核心 3D 模型用于使用 Serpent2 计算此瞬态。此外，还提出了一个点动力学解决方案。Serpent 结果与实验和点动力学计算进行了比较。在数据敏感性分析中使用了两个不同的核数据库（ENDF/B-VIII.0、JEFF3.3）。Serpent 3D 动力学结果几乎与点动力学方程解相同。实验数据因杆的价值而异。这项研究表明，新的 Serpent 动态工具包可以准确描述此瞬态期间的反应堆行为。