Investigation of thermo-catalytic decomposition of metal-iodide aerosols due to passage through hydrogen recombiners

Kissane, MP; Mitrakos, D; Housiadas, C; Sabroux, JC

dc.contributor.author	Kissane, MP	en
dc.contributor.author	Mitrakos, D	en
dc.contributor.author	Housiadas, C	en
dc.contributor.author	Sabroux, JC	en
dc.date.accessioned	2014-03-01T01:30:57Z
dc.date.available	2014-03-01T01:30:57Z
dc.date.issued	2009	en
dc.identifier.issn	0029-5493	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19693
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.other	Accident conditions	en
dc.subject.other	Ambient conditions	en
dc.subject.other	Autocatalytic	en
dc.subject.other	Catalytic decomposition	en
dc.subject.other	Catalytic element	en
dc.subject.other	Computer codes	en
dc.subject.other	Containment buildings	en
dc.subject.other	Hydrogen accumulation	en
dc.subject.other	Lumped-parameter	en
dc.subject.other	Molecular iodine	en
dc.subject.other	Potential problems	en
dc.subject.other	Radioactive aerosols	en
dc.subject.other	Rapid cooling	en
dc.subject.other	Reacting mixture	en
dc.subject.other	Recombiners	en
dc.subject.other	Volatile chemicals	en
dc.subject.other	Volatile species	en
dc.subject.other	Accidents	en
dc.subject.other	Atmospheric aerosols	en
dc.subject.other	Industrial chemicals	en
dc.subject.other	Iodine	en
dc.subject.other	Nuclear propulsion	en
dc.subject.other	Nuclear reactors	en
dc.subject.other	Radioactive elements	en
dc.subject.other	Vapors	en
dc.subject.other	Hazardous materials	en
dc.title	Investigation of thermo-catalytic decomposition of metal-iodide aerosols due to passage through hydrogen recombiners	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.nucengdes.2009.08.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.nucengdes.2009.08.001	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Passive autocatalytic recombiners (PARs) are a means of preventing hydrogen accumulation in the containment building of a water-cooled nuclear reactor during an accident. A potential problem exists concerning suspended radioactive aerosols: particles passing through the catalytic elements are heated up with significant evaporation of more volatile chemical species. The aerosols, vapours and carrier-gas mixture may chemically react resulting potentially in conversion of easily-retained aerosol material into more troublesome vapours and gases. An experimental programme, RECI, demonstrated that potential exists for PARs to generate volatile forms of iodine, namely molecular iodine, by thermo-catalytic decomposition of metal-iodide aerosols. Here, analysis of RECI results aided by two computer codes, one a field code the other a lumped-parameter approach, provides significant insight into the iodide-iodine phenomenology where, in particular, the rapid cooling of the reacting mixture explains the persistence of volatile species downstream at ambient conditions. While understanding of the phenomenology has progressed, the current results cannot be extrapolated to the reactor case since further experiments are needed reproducing more closely expected accident conditions. (C) 2009 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.2009.08.001	en
dc.identifier.isi	ISI:000273106600041	en
dc.identifier.volume	239	en
dc.identifier.issue	12	en
dc.identifier.spage	3003	en
dc.identifier.epage	3013	en