Investigation of the liquid flow rate effect on the rewetting rate

Konstantaropoulou, A.P.; Simopoulos, S.E.

dc.contributor.author	Konstantaropoulou, A.P.
dc.contributor.author	Simopoulos, S.E.
dc.date.accessioned	2021-04-29T10:17:57Z
dc.date.available	2021-04-29T10:17:57Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/53376
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.21074
dc.language.iso	en	en
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/gr/	*
dc.subject	Πυρηνική Τεχνολογία	el
dc.subject	Πυρηνικοί αντιδραστήρες	el
dc.subject	Ράβδοι πυρηνικού καυσίμου	el
dc.subject	Επανάψυξη	el
dc.subject	Υγρό μέτωπο	el
dc.subject	Nuclear Engineering	en
dc.subject	Nuclear reactors	el
dc.subject	Nuclear fuel rods	el
dc.subject	Rewetting	el
dc.subject	Quench front	el
dc.title	Investigation of the liquid flow rate effect on the rewetting rate	en
heal.type	conferenceItem
heal.classification	Nuclear Engineering	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	1991-06-03
heal.bibliographicCitation	Konstantaropoulou A.P. and Simopoulos S.E., (1991), “Investigation of the liquid flowrate effect on the rewetting rate”, Proceedings of Analysis of THermal and Energy Systems, ATHENS '91, Athens, Greece.	en
heal.abstract	Following a Loss-or-coolant Accident (LOCA) in a water cooled nuclear reactor, process of fundamental importance is the rewetting of the overheated fuel elements by an Emergency Core Cooling System (ECCS). It is well accepted that the rate of advance of the wet front depends upon several parameters, the most important being the initial temperature of the overheated fuel elements cladding, the system pressure, the heat transfer coefficient at the wet front, and the properties of the cladding. The effect of secondary parameters, such as the quenching liquid inlet subcooling and flowrate, and the precursory cooling ahead of the wet front due to the droplet-vapor mixture, are still under investigation. The present work is a detailed statistical analysis of available experimental data. It uses the method of confidence interval ellipses, to investigate the liquid flowrate effect on the rewetting rate. The results of this analysis show that the rewetting rate increases with the liquid flowrate only when the wet front advances in an open air environment at atmospheric pressure, while it remains unaffected in a vapor environment at relatively high pressures.	en
heal.publisher	GREG FOUNTAS, Technical and Scientific Editions	en
heal.fullTextAvailability	false
heal.conferenceName	Analysis of Thermal and Energy Systems, Athens '91	en
heal.conferenceItemType	full paper