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

Mitrakos, D; Chatzidakis, S; Hinis, EP; Herranz, LE; Parozzi, F; Housiadas, C

dc.contributor.author	Mitrakos, D	en
dc.contributor.author	Chatzidakis, S	en
dc.contributor.author	Hinis, EP	en
dc.contributor.author	Herranz, LE	en
dc.contributor.author	Parozzi, F	en
dc.contributor.author	Housiadas, C	en
dc.date.accessioned	2014-03-01T01:27:47Z
dc.date.available	2014-03-01T01:27:47Z
dc.date.issued	2008	en
dc.identifier.issn	0029-5493	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18579
dc.subject	Analytic Solution	en
dc.subject	Experimental Data	en
dc.subject	Mechanistic Model	en
dc.subject	Numerical Solution	en
dc.subject	Severe Accident	en
dc.subject	Transport Equation	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.other	Air pollution	en
dc.subject.other	Atmospheric aerosols	en
dc.subject.other	Cracks	en
dc.subject.other	Solutions	en
dc.subject.other	Aerosol flows	en
dc.subject.other	Aerosol particles	en
dc.subject.other	Aerosol transports	en
dc.subject.other	Analytical solutions	en
dc.subject.other	Brownian diffusions	en
dc.subject.other	Catastrophic failures	en
dc.subject.other	Concrete cracks	en
dc.subject.other	Dimensional models	en
dc.subject.other	Eulerian models	en
dc.subject.other	Experimental datum	en
dc.subject.other	Gravitational settling	en
dc.subject.other	Large systems	en
dc.subject.other	Leak paths	en
dc.subject.other	Mechanistic models	en
dc.subject.other	Nuclear aerosols	en
dc.subject.other	Numerical solutions	en
dc.subject.other	Particle penetrations	en
dc.subject.other	Plug formations	en
dc.subject.other	Removal mechanisms	en
dc.subject.other	Severe accidents	en
dc.subject.other	Aerosols	en
dc.title	A simple mechanistic model for particle penetration and plugging in tubes and cracks	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.nucengdes.2008.07.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.nucengdes.2008.07.002	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	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
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Nuclear Engineering and Design	en
dc.identifier.doi	10.1016/j.nucengdes.2008.07.002	en
dc.identifier.isi	ISI:000261292000021	en
dc.identifier.volume	238	en
dc.identifier.issue	12	en
dc.identifier.spage	3370	en
dc.identifier.epage	3378	en