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ナトリウム冷却高速炉の炉心損傷事故時の制御棒材の共晶溶融挙動に関する研究,13; 7mass% B$$_{4}$$C-SS共晶溶融物の密度および表面張力測定

Study on eutectic melting behavior of control rod materials in core disruptive accidents of sodium-cooled fast reactors, 13; Density and surface tension of 7mass% B$$_{4}$$C-SS eutectic molten materials

福山 博之*; 東 英生*; 山野 秀将   

Fukuyama, Hiroyuki*; Higashi, Hideo*; Yamano, Hidemasa

ナトリウム冷却高速炉の炉心損傷事故における制御棒材(炭化ホウ素: B$$_{4}$$C)と原子炉構造材(ステンレス鋼: SUS316L (SS))の共晶反応挙動を模擬するのに必要な熱物性モデル構築のため、超高温熱物性計測システム(PROSPECT)により、系統的にB$$_{4}$$C-SS系融体の熱物性計測を行っている。令和元年度は7mass%B$$_{4}$$C-SS系融体の密度および表面張力の測定を行った結果について報告する。

The purpose of this study is to develop the thermophysical property model needed to simulate the behavior of the eutectic compound of the control rod material (boron carbide (B$$_{4}$$C)) and the structural material of a reactor vessel (stainless steel: SUS316L (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes the density and surface tension of the molten compound of 7mass% B$$_{4}$$C-SS systematically measured with the High-Temperature Thermophysical Property Measurement System (PROSPECT).

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