Suppression measures and effective triggering retardant of steam explosions

Masahiro Furuya, Takahiro Arai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationInternational Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015
PublisherAmerican Nuclear Society
Pages6579-6589
Number of pages11
ISBN (Electronic)9781510811843
Publication statusPublished - 2015 Jan 1
Externally publishedYes
Event16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015 - Chicago, United States
Duration: 2015 Aug 302015 Sep 4

Publication series

NameInternational Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015
Volume8

Other

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

Fingerprint

retardants
steam
Explosions
explosions
Steam
retarding
molecular weight
Molecular weight
Polyethylene glycols
glycols
polyethylenes
Vapors
vapors
light water reactors
Salts
salts
Light water reactors
controllability
sodium chlorides
Sodium chloride

Keywords

  • Additives
  • Cloudy-point phenomenon
  • Polyethylene glycol
  • Steam explosion retardant
  • Triggering

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear Energy and Engineering

Cite this

Furuya, M., & Arai, T. (2015). Suppression measures and effective triggering retardant of steam explosions. In International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015 (pp. 6579-6589). (International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015; Vol. 8). American Nuclear Society.

Suppression measures and effective triggering retardant of steam explosions. / Furuya, Masahiro; Arai, Takahiro.

International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015. American Nuclear Society, 2015. p. 6579-6589 (International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015; Vol. 8).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Furuya, M & Arai, T 2015, Suppression measures and effective triggering retardant of steam explosions. in International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015. International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015, vol. 8, American Nuclear Society, pp. 6579-6589, 16th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, NURETH 2015, Chicago, United States, 15/8/30.
Furuya M, Arai T. Suppression measures and effective triggering retardant of steam explosions. In International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015. American Nuclear Society. 2015. p. 6579-6589. (International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015).
Furuya, Masahiro ; Arai, Takahiro. / Suppression measures and effective triggering retardant of steam explosions. International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015. American Nuclear Society, 2015. pp. 6579-6589 (International Topical Meeting on Nuclear Reactor Thermal Hydraulics 2015, NURETH 2015).
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