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A simple mechanistic model for particle penetration and plugging in tubes and cracks

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National Technical University of Athens   

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A simple mechanistic model for particle penetration and plugging in tubes and cracks (EN)
Housiadas, C (EN)
Chatzidakis, S (EN)
Herranz, LE (EN)
Parozzi, F (EN)
Hinis, EP (EN)
Mitrakos, D (EN)
journalArticle (EN)
2014-03-01T01:27:47Z
2008 (EN)
In the course of a severe accident, some nuclear aerosols may be released to the environment through penetrating the containment concrete cracks, even if a catastrophic failure of the containment does not occur. There is experimental and theoretical evidence of strong retention of aerosol particles in the cracks that act as a filter. In this work a Eulerian model is developed based on the numerical solution of the one-dimensional aerosol transport equation. Plug formation is accommodated by allowing the crack diameter to change with time, based on the volume of the deposited mass. Brownian diffusion, gravitational settling and turbulence-driven deposition are considered as the removal mechanisms of the particles along the leak path. The model is verified against analytical solutions and validated by comparing with early as well as recent experimental data. It is concluded that a one-dimensional model of aerosol flow through a hydraulically equivalent leaking duct can simulate with enough accuracy aerosol transport in cracks, so that it may be an appropriate option for a large system code like ASTEC. (C) 2008 Elsevier B.V. All rights reserved. (EN)
Nuclear Science & Technology (EN)
Removal mechanisms (EN)
Aerosol transports (EN)
Particle penetrations (EN)
Severe accidents (EN)
Numerical Solution (EN)
Mechanistic models (EN)
Cracks (EN)
Mechanistic Model (EN)
Gravitational settling (EN)
Solutions (EN)
Analytic Solution (EN)
Experimental datum (EN)
Numerical solutions (EN)
Nuclear aerosols (EN)
Leak paths (EN)
Transport Equation (EN)
Severe Accident (EN)
Aerosol flows (EN)
Brownian diffusions (EN)
Analytical solutions (EN)
Atmospheric aerosols (EN)
Catastrophic failures (EN)
Eulerian models (EN)
Dimensional models (EN)
Large systems (EN)
Experimental Data (EN)
Aerosol particles (EN)
Concrete cracks (EN)
Aerosols (EN)
Air pollution (EN)
Plug formations (EN)
Nuclear Engineering and Design (EN)
English
ELSEVIER SCIENCE SA (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
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