碳化硼与不锈钢共晶反应的定量研究方法,Annals of Nuclear Energy

堆芯破坏性事故（CDA）是第四代钠冷快堆开发中的关键场景。CDA 评估中的关键问题之一是碳化硼 (B 4 C) 和不锈钢 (SS) 之间的共晶反应。为了在 CDA 分析代码中开发物理模型，有必要研究 B 4 C-SS 共晶反应。为了评估反应，本研究提出了一种使用焦耳加热的定量和高分辨率方法。使用 B 4进行实验C材料和SUS304管。使用最初提出的方程，得到了1450 K-1500 K范围内的反应速率常数数据，这在过去是很少见的。得出的反应速率常数值与参考值一致。还进行了反应层微观结构观察和相关化学成分分析。结果验证了所提出的方法。可以得出结论，新方法可靠，效率高。

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Core Disruptive Accident (CDA) is a critical scenario in the Generation IV sodium-cooled fast reactor development. One of the key issues in the CDA evaluation is the eutectic reaction between Boron carbide (B4C) and Stainless Steel (SS). For developing a physical model in the CDA analysis code, it is necessary to investigate the B4C-SS eutectic reaction. To assess the reaction, one quantitative and high-resolution method using Joule heating is proposed in this study. Experiments were conducted using B4C material and SUS304 tubes. With an originally proposed equation, reaction rate constant data in the 1450 K-1500 K range were obtained, which was scarce in the past. The derived reaction rate constant values are consistent with the reference values. The reaction layer microstructure observation and the associated chemical composition analysis were also conducted. The proposed method is validated by the results. It can be concluded that the new method is credible with high efficiency.