A4 Conference proceedings

CFD modelling of chugging condensation regime of bwr suppression pool experiments


Publication Details
Authors: Tanskanen Vesa, Patel Giteshkumar, Puustinen Markku, Hujala Elina, Kyrki-Rajamäki Riitta, Hyvärinen Juhani
Publication year: 2015
Language: English
Related Journal or Series Information: International Topical Meeting On Nuclear Reactor Thermal Hydraulics
Title of parent publication: 16th International Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-16), Chicago, IL, August 30 - September 4 2015
Start page: 3940
End page: 3953
ISBN: 978-0-89448-722-4
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication

Abstract
In this work, the chugging direct contact condensation (DCC) mode of BWR suppression pool operation issimulated by using Eulerian-Eulerian two-fluid approach of the compressible flow NEPTUNE_CFDsoftware and the OpenFOAM CFD code. The interfacial heat transfer between steam and water is modeledby using condensation models based on the surface renewal theory. Flow turbulence is solved by employingthe standard k-ε turbulence model. As the condensation rate could not be measured experimentally, a patternrecognition algorithm was used to extract information about the bubble size and the chugging frequencyduring the steam discharges. The experimental references for the analysis and simulations have beenobtained from the suppression pool test facility experiments of the Lappeenranta University of Technology.The reference cases contain steam discharges within the open pool test facility POOLEX and within thepressurizing drywell-wetwell test facility PPOOLEX. The simulation results indicate that the qualitativenature of chugging can be captured well with the computational fluid dynamics (CFD) modelling and betterquantitative results can be reached by DCC model development.

Last updated on 2017-22-03 at 14:03