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Studer, E.*; 安部 諭; Andreani, M.*; Bharj, J. S.*; Gera, B.*; Ishay, L.*; Kelm, S.*; Kim, J.*; Lu, Y.*; Paliwal, P.*; et al.
Proceedings of 12th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics, Operation and Safety (NUTHOS-12) (USB Flash Drive), 16 Pages, 2018/10
Nuclear engineering research groups were interested in the phenomena of the interaction between a rising jet and a stratified layer located above in order to better understand the underlying mechanisms of hydrogen accumulation and dispersion in a nuclear reactor containment. Previous studies were performed with an upward jet of fluid heavier or lighter than the upper stratified layer. However, in real configurations i.e. the inner part of a nuclear containment, obstacles such as pipes, components as pumps or reservoirs and walls are present, and they can dissipate the initial momentum of the gas release. Consequently, the upward flow pattern can be considered "diffuse" and buoyant, neither pure jet nor pure plume. Therefore, this challenging issue was part of a project called HYMERES, which was launched and conducted in the OECD/NEA framework. Dedicated experiments were performed to study the interaction between a diffuse buoyant jet and two-layer stratification. In the large-scale MISTRA facility, the HM1-1 test series were conducted in which the erosive flow pattern came from a horizontal hot air jet impinging on a vertical cylinder. These experimental results were offered for a blind and open benchmark exercise.
松川 誠; 菊池 満; 藤井 常幸; 藤田 隆明; 林 孝夫; 東島 智; 細金 延幸; 池田 佳隆; 井手 俊介; 石田 真一; et al.
Fusion Engineering and Design, 83(7-9), p.795 - 803, 2008/12
被引用回数:17 パーセンタイル:72.86(Nuclear Science & Technology)JT-60SAは、日欧の幅広いアプローチの下で建設する完全超伝導トカマク装置で、ITERや原型炉への貢献を目指している。2007年の両極の国会批准後、実質的には既に建設段階に移行している。JT-60SAは、既存の建屋,電源,プラズマ加熱装置,計測装置などの、JT-60U設備の最大限の有効利用が前提であり、完全に新作する主たる機器は本体装置のみである。最大プラズマは電流5.5MAで、プラズマ主半径3.06m,アスペクト比2.65,非円形度1.76,三確度0.36である。最大プラズマ加熱入力41MW,プラズマ電流のフラットトップ時間は100秒間である。本論文では、トカマク装置本体だけでなく、プラズマ加熱装置や遠隔保守装置の設計などについても言及するとともに、EUとの技術的な議論を踏まえて行った超伝導導体に関する最近の設計変更案などを紹介し、装置の全体像を明らかにする。