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Modeling of spacer influence on post-dryout heat transfer in heated channels
KTH, Skolan för teknikvetenskap (SCI), Fysik, Reaktorteknologi.ORCID-id: 0000-0001-5595-1952
2006 (Engelska)Ingår i: International Conference on Nuclear Engineering, Proceedings, ICONE Volume 2006, 2006, 7p, 2006Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Post-dryout heat transfer plays an important role in safe and economical operations of Light Water Reactors (LWR). This type of heat transfer is avoided under normal operational conditions of nuclear reactors; however, it may occur in transient or accidential situations. To estimate the risk of clad damages due to increase of temperature associated with the occurrence of post-dryout, it is necessary to properly model heat transfer processes under such conditions. The influence of various parameters on heat transfer downstream of spacer has been investigated. It is concluded that heat transfer enhancement due to spacers is largely under-predicted for flows with relatively low quality. For such flows the effect of droplets impinging heated walls is significant and must properly be taken into account. The phenomenological model presented in this paper shows a superior accuracy over correlations and presents a potential to capture the phenomenon of rewetting that occurs downstream of spacers.

Ort, förlag, år, upplaga, sidor
2006.
Serie
International Conference on Nuclear Engineering, Proceedings, ICONE ; 2006
Nyckelord [en]
Clad damages, Heated walls, Rewetting, Spacers, Accident prevention, Light water reactors, Mathematical models, Nuclear reactors, Heat transfer
Nationell ämneskategori
Atom- och molekylfysik och optik
Identifikatorer
URN: urn:nbn:se:kth:diva-155871DOI: 10.1115/ICONE14-89713Scopus ID: 2-s2.0-33845734076ISBN: 0791837831 (tryckt)ISBN: 9780791837832 (tryckt)OAI: oai:DiVA.org:kth-155871DiVA, id: diva2:764012
Konferens
Fourteenth International Conference on Nuclear Engineering 2006, ICONE 14, 17 July 2006 through 20 July 2006, Miami, FL
Anmärkning

QC 20141118

Tillgänglig från: 2014-11-18 Skapad: 2014-11-13 Senast uppdaterad: 2014-11-18Bibliografiskt granskad

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Anglart, Henryk

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Totalt: 202 träffar
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