Suppression measures and effective triggering retardant of steam explosions

Masahiro Furuya*, Takahiro Arai

*この研究の対応する著者

研究成果

1 被引用数 (Scopus)

抄録

Steam explosion has been a potential threat during severe accident in light water reactors. We had reported that Polyethylene glycol (PEG) is a reliable retardant of steam explosions. Experiments were conducted to investigate the effects of concentration, molecular weight and salt additives on the controllability of steam explosions. Steam explosion was suppressed with a 0.03 wt% PEG solution for molecular weight of 4 million. This is because the cloudy-point phenomenon stabilizes vapor film and prevents the solution from mixing finely by the precipitated solute near the steam-water interface. The stabilizing effect of vapor film was confirmed in a solid stainless-steel sphere quenching experiment as well. The molecular weight must be selected in reference to the cloudy-point temperature to be lower than saturation temperature by a certain degrees at the target pressure. At atmospheric pressure, a molecular weight of 4 million is demonstrated to suppress steam explosions. The effective concentration became denser when large share stress and/or external force act on the vapor film. Steam explosion may occur in a PEG solution by adding lwt% of sodium chloride, because such salts act as steam explosion promoter.

本文言語English
ホスト出版物のタイトルInternational Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015
出版社American Nuclear Society
ページ6579-6589
ページ数11
ISBN(電子版)9781510811843
出版ステータスPublished - 2015 1 1
外部発表はい
イベント16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015 - Chicago, United States
継続期間: 2015 8 302015 9 4

出版物シリーズ

名前International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015
8

Other

Other16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015
国/地域United States
CityChicago
Period15/8/3015/9/4

ASJC Scopus subject areas

  • 器械工学
  • 原子力エネルギーおよび原子力工学

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