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炭化ホウ素とステンレス鋼の共晶反応試験後の材料分析

Post-test material analysis of eutectic reaction of boron carbide and stainless steel

山野 秀将   ; 高井 俊秀  

Yamano, Hidemasa; Takai, Toshihide

我が国の先進ナトリウム冷却高速炉の炉心損傷事故評価において制御棒材の炭化ホウ素(B$$_{4}$$C)とステンレス鋼(SS)の共晶溶融反応及び移動挙動を模擬する必要がある。その共晶溶融反応および移動挙動に関する物理モデルの妥当性確認のため、約1500度まで加熱した数kgのSS溶融物とB$$_{4}$$Cペレットを接触させて、SS-B$$_{4}$$Cの共晶溶融に関する可視化実験を実施した。本発表はその実験で形成された共晶溶融物の化学分析結果を記述するとともに、これを実験の解釈及び解析コードの検証に役立てていく。

It is necessary to simulate a eutectic melting reaction and relocation behavior of boron carbide (B$$_{4}$$C) as a control rod material and stainless steel (SS) during a core disruptive accident in an advanced sodium-cooled fast reactor designed in Japan. To validate a physical model simulating the eutectic melting reaction and relocation, the visualization experiments of SS-B$$_{4}$$C eutectic reaction was carried out by contacting SS melts of several kg with a B$$_{4}$$C pellet heated up to about 1500$$^{circ}$$C. This paper describes chemical analysis results of eutectic materials formed in the experiment, which are served as interpretation of the experiments and code validation.

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