Kinetic energy evaluation for the steam explosion in a shallow pool with a spreading melt layer at the bottom

Kiyofumi Moriyama*, Masahiro Furuya

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Steam explosion experiments with a melt layer spreading at the bottom of a shallow water pool, namely the PULiMS-E6 and SES-S1 by KTH, Sweden, were simulated by the steam explosion simulation code, JASMINE. The observed impulses in the experiments were successfully reproduced by simulations with assumed premixing conditions. With those simulation results, the adequacy of the kinetic energy evaluation method used for the experiments were examined by comparison of the kinetic energy directly obtained in the simulation, Ek, and the one evaluated based on the impulse and the water mass limited to the center area above the premixing zone, Ekic. It showed that the impulse based kinetic energy evaluation gives about five times overestimation. The impact of the water pool geometry on the validity of the impulse based kinetic energy evaluation method was further examined by a parametric study with variations of the pool geometry in the simulations of PULiMS-E6 and SES-S1 as well as high pressure bubble expansion simulations. The results for the relation of Ekic/Ek and the geometric factors were consistent between the cases for the experiments and the bubble expansion. The results showed that: (1) for the shallow water pool regime, Ekic/Ek shows a trend of convergence to 4–5, (2) for deep water pool regime, the impulse based kinetic energy evaluation with the whole water mass, Eki, rather than Ekic, gives a good estimation. A set of empirical formulas was obtained for Ekic/Ek.

本文言語English
論文番号110521
ジャーナルNuclear Engineering and Design
360
DOI
出版ステータスPublished - 2020 4月 15

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 材料科学(全般)
  • 安全性、リスク、信頼性、品質管理
  • 廃棄物管理と処理
  • 機械工学

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