Abstract The reactivity worth and calibration curve of control rods are important physical parameters on account of nuclear safety of the reactor core. Reactivity characteristics of control rods must be determined in the first criticality and also after any substantial changes in a reactor core. The required time to measure the reactivity worth by various methods depends mostly on the quality of the reactivity compensation. The rod-insertion method has some specific advantages which make such compensation unnecessary, while yielding both integral and differential reactivity worth curves, as well as total reactivity worth. In this study, one control rod of Heavy Water Zero Power Reactor (HWZPR) pitch is calibrated experimentally using rod-insertion method to verify calculation results for the new core configuration. Total reactivity worth of the control rod is obtained 0.001759 ± 2.8%Δk/k and 0.001801 ± 5%Δk/k by experiment and calculation, respectively. The relative difference between the experimental and calculated values of control rod reactivity worth is about 2.36%, which indicates a good agreement between the applied experimental method and calculation. The results show that the reactivity worth of the control rod depends on the flux value and position of detectors in rod insertion method.

中文翻译：

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HWZPR新型堆芯结构控制棒标定曲线积分形式采用插棒法

摘要 控制棒的反应性值和标定曲线是关系到堆芯核安全的重要物理参数。控制棒的反应特性必须在第一次临界时以及在反应堆堆芯发生任何实质性变化之后确定。通过各种方法测量反应性价值所需的时间主要取决于反应性补偿的质量。棒插入方法有一些特定的优点，使得这种补偿变得不必要，同时产生积分和微分反应价值曲线，以及总反应价值。在这项研究中，重水零功率反应堆 (HWZPR) 节距的一根控制棒使用棒插入方法进行了实验校准，以验证新堆芯配置的计算结果。通过实验和计算，控制棒的总反应性值分别为 0.001759 ± 2.8%Δk/k 和 0.001801 ± 5%Δk/k。对照棒反应性值的实验值与计算值之间的相对差异约为2.36%，表明所应用的实验方法与计算值之间具有良好的一致性。结果表明，在棒插入法中，控制棒的反应价值取决于通量值和探测器的位置。