Journal ArticleDOI
Premixing-related behavior of steam explosions
TLDR
In this paper, the results of these analyses are shown to provide quantitative interpretations of the data, and to suggest conditions/measurements in further experiments to enhance the insights obtained, and a quantitative radiography technique is described and applied to Magico for the measurement of chordal-averaged void fractions in the mixing zone.Citations
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A local thermal non-equilibrium model for two-phase flows with phase-change in porous media
TL;DR: In this article, the volume averaging method is used to derive a three-temperature macroscopic model considering local thermal non-equilibrium between the three phases. But the assumption of local thermal equilibrium appears to be too restrictive and fails to be valid.
Journal ArticleDOI
The study of steam explosions in nuclear systems
TL;DR: In this article, a comprehensive approach is described and sample results are provided on 2D explosions from the recently proposed microinteractions model (the esprose.m code) and on the chemical augmentation of steam explosions with highly reactive metals.
Journal ArticleDOI
Breakup of melt jets as pre-condition for premixing: Modeling and experimental verification
TL;DR: In this paper, a detailed model of the Ikejet was developed at the IKE and strong differences between the Kelvin-Helmholtz (KH) description of the interface instabilities and the Jeffreys-Miles (JM) approach were analyzed in comparison with experimental results.
Journal ArticleDOI
The impact of thermal non-equilibrium and large-scale 2D/3D effects on debris bed reflooding and coolability
TL;DR: In this article, the authors proposed a three-dimensional model to predict the flow in a non-homogeneous debris bed of any shape and showed the influence of the porous medium characteristics.
Journal ArticleDOI
Phenomenological studies on melt-coolant interactions in the ALPHA program
TL;DR: In this article, a series of experiments to investigate melt-coolant interactions have been performed as part of the ALPHA program at JAERI, where melt simulating a molten core was dropped into a pool of water and volume fractions of the melt, water and steam in the mixing region prior to the occurrence of spontaneous steam explosions were quantified.
References
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Journal ArticleDOI
Drag coefficient and relative velocity in bubbly, droplet or particulate flows
Mamoru Ishii,Novak Zuber +1 more
TL;DR: In this article, the relative motion correlations for dispersed two-phase flows of bubbles, drops, and particles were developed from simple similarity criteria and a mixture viscosity model, and satisfactory agreements were obtained at wide ranges of the particle concentration and Reynolds number.
An assessment of steam-explosion-induced containment failure
TL;DR: In this paper, a probabilistic framework is proposed to quantify the likelihood of steam explosion induced (cap alpha-mode) containment failure from core melt accidents in commercial light water reactors.
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