Abstract Interaction of radiation with matter results in heat generation and in effect, changes in the irradiation sample’s quality. Knowledge about heat deposition within the irradiation sites can go a long way in enhancing the safety and quality of the irradiation condition. To measure such results, SCK-CEN Gamma Thermometer (GT) is used for experimentally measuring Gamma Heating (GH) during the operation of McMaster Nuclear Reactor (MNR) at three irradiation sites. In addition, Monte Carlo reactor physics code (Serpent-2) is also used for modeling the MNR in order to compare as well as validate it against experimental and operational measured data such as the multiplication factor ( k eff ) during the operational day against the actual values (unity), the experimentally measured GH values. After finding a difference of 0.45% at the beginning of the day and 0.32% at the end of the day in the k eff , a comparable GH profile was observed between the measurement and the calculation. Additionally, the average axial differences of GH results found in the beryllium irradiation site (2A), and the graphite irradiation sites (8B and 8E) are 4.71%, 10.71%, and 11.72%.

中文翻译：

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核研究堆不同辐照点伽马加热的实验测量和蒙特卡罗代码模拟

摘要 辐射与物质的相互作用会产生热量，进而影响辐照样品的质量。有关辐照点内热沉积的知识对提高辐照条件的安全性和质量大有帮助。为了测量这样的结果，SCK-CEN 伽马温度计 (GT) 用于在三个辐照地点对麦克马斯特核反应堆 (MNR) 运行期间的伽马加热 (GH) 进行实验测量。此外，蒙特卡罗反应堆物理代码 (Serpent-2) 还用于对 MNR 进行建模，以便将其与实验和运行测量数据进行比较和验证，例如运行日期间的倍增因子 (k eff ) 与实际值（单位），实验测得的 GH 值。发现差值为 0 后。在 k eff 中，在一天开始时为 45%，在一天结束时为 0.32%，在测量和计算之间观察到可比较的 GH 曲线。此外，在铍照射部位（2A）和石墨照射部位（8B 和 8E）中发现的 GH 结果的平均轴向差异为 4.71%、10.71% 和 11.72%。