Two-phase mixture level swell during pool scrubbing in terms of flow geometry

Takahiro Arai, Masahiro Furuya, Hiroki Takiguchi, Kenetsu Shirakawa

研究成果: Conference contribution

抜粋

When boiling occurs in a pool or gas is injected into a stagnant water pool, the actual liquid level, i.e., the two-phase mixture level, becomes higher than the original liquid level, i.e., the collapsed water level, and depends on the gas held in the liquid pool. The two-phase mixture level is an important indicator of the core cooling of a nuclear reactor and of the long-term operation of the filtered containment venting system under accident conditions. To clarify the relationship between the two-phase mixture and collapsed water levels, we conducted an air-water two-phase flow experiment in which we used different channel geometries, i.e., circular pipes and rod bundles, to inject air at atmospheric pressure into stagnant water. Then, we used visual observation to obtain the swell and fluctuation amplitude of the two-phase mixture level. The results indicate that with increases in the superficial gas velocity, the flow channel geometry significantly affects the swell of the two-phase mixture level, and that the dominant bubble scale in the rod bundle was influenced by both the hydraulic diameter and the channel-box scale. We compared the height and fluctuation amplitude of the two-phase mixture level with existing and newly acquired experimental data and models.

元の言語English
ホスト出版物のタイトルProceedings of the 27th International Conference on Nuclear Engineering, ICONE 2019 - "Nuclear Power Saves the World!"
出版者American Society of Mechanical Engineers (ASME)
ISBN(印刷物)9784888982566
出版物ステータスPublished - 2019 5 18
外部発表Yes
イベント27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019 - Tsukuba, Ibaraki, Japan
継続期間: 2019 5 192019 5 24

出版物シリーズ

名前International Conference on Nuclear Engineering, Proceedings, ICONE
2019-May

Conference

Conference27th International Conference on Nuclear Engineering: Nuclear Power Saves the World!, ICONE 2019
Japan
Tsukuba, Ibaraki
期間19/5/1919/5/24

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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  • これを引用

    Arai, T., Furuya, M., Takiguchi, H., & Shirakawa, K. (2019). Two-phase mixture level swell during pool scrubbing in terms of flow geometry. : Proceedings of the 27th International Conference on Nuclear Engineering, ICONE 2019 - "Nuclear Power Saves the World!" (International Conference on Nuclear Engineering, Proceedings, ICONE; 巻数 2019-May). American Society of Mechanical Engineers (ASME).