Scaling of Downward Facing Boiling and Steam Venting in a Reactor Vessel/Insulation System

F. B. Cheung, J. Yang, M. B. Dizon, J. L. Rempe, K. Y. Suh, S. B. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Scopus citations


As part of joint U.S.-Korean International Nuclear Engineering Research Initiative (INERI) investigating methods to enhance external cooling of advanced reactor vessel under severe accident conditions, a scaling analysis has been performed to study the phenomena of external cooling of an advanced reactor vessel under severe accident conditions. Five key transfer processes have been considered and the characteristic time for each of these processes has been determined and compared with the residence time for external reactor vessel cooling (ERVC) in the flow channel. To complement the scaling analysis, an ERVC upward co-current two-phase flow model has been developed to predict the total mass flow rate induced in the annular channel by the process of downward facing boiling on the vessel outer surface. The model takes into account the wall heat flux level, the geometry of the vessel/insulation system, the local variation of the cross-sectional flow area, and the pressure drops through various segments of the channel. Based on the results of the ERVC flow calculations and the scaling analysis, criteria for experimental simulation have been established to assure that the ERVC phenomena simulated in laboratory-scale experiments would have the same effects as those anticipated for the full-scale reactor system.

Original languageEnglish (US)
Title of host publicationProceedings of the 2003 ASME Summer Heat Transfer Conference, Volume 2
PublisherAmerican Society of Mechanical Engineers
Number of pages9
ISBN (Print)0791836940, 9780791836941
StatePublished - 2003
Event2003 ASME Summer Heat Transfer Conference (HT2003) - Las Vegas, NV, United States
Duration: Jul 21 2003Jul 23 2003

Publication series

NameProceedings of the ASME Summer Heat Transfer Conference


Other2003 ASME Summer Heat Transfer Conference (HT2003)
Country/TerritoryUnited States
CityLas Vegas, NV

All Science Journal Classification (ASJC) codes

  • General Engineering


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