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Visualization experiments of radiation heating on the eutectic reaction between B$$_{4}$$C-SS and its relocation behavior

B$$_{4}$$Cとステンレス鋼の共晶反応と再配置挙動に関する輻射加熱可視化実験

Ahmed, Z.*; Sharma, A. K.*; Pellegrini, M.*; 山野 秀将   ; 岡本 孝司*

Ahmed, Z.*; Sharma, A. K.*; Pellegrini, M.*; Yamano, Hidemasa; Okamoto, Koji*

本研究では、共晶反応とそれに続くボロン移動の融体構造について、輻射加熱を使って定量的な高解像度可視化手法によって観察した。実験は、1150$$^{circ}$$Cから1372$$^{circ}$$Cの温度範囲で実機の制御棒設計を模擬したステンレス鋼(SS)管と炭化ホウ素(B$$_{4}$$C)ペレットを用いて実施した。正確な可視化技術によって、共晶溶融開始タイミングとその温度を同定し、ペレットとパウダーのケースで差異を指摘した。

In this study, the eutectic behavior and subsequent melt structure of boron migration are observed by a quantitative and high-resolution visualization method using radiative heating. Experiments were conducted using B4C pellet and powder within SS tubes, replicating the actual control rod design in the temperature range of 1150$$^{circ}$$C to 1372$$^{circ}$$C to study long-duration melting and relocation behavior. The visualization technique accurately identified the time of eutectic melting onset and the related temperature, pointing out different values for the pellet and the powder cases.

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