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Steam flow through the volumetrically heated particle bed
KTH, Superseded Departments, Energy Technology.
2002 (English)In: International journal of thermal sciences, ISSN 1290-0729, E-ISSN 1778-4166, Vol. 41, no 11, 1077-1087 p.Article in journal (Refereed) Published
Abstract [en]

The paper is devoted to the problem of ex-vessel debris bed coolability, in particular, coolability and quenching of a particulate corium debris bed by water. A number of experiments were performed in the POMECO (POrous MEdia COolability) facility to measure the dry out heat flux in a self-heated bed. A mathematical model for the description of flow of a compressible fluid (steam) through the volumetrically heated porous bed with particular consideration of the non-thermal local equilibrium is formulated and solved numerically using the split step method. It is shown that initial thermodynamic perturbations which, if they grow, will lead to a temperature escalation at a specific location. Furthermore, the data from the RIT (Royal Institute of Technology) POMECO (POrous MEdia COolability) experiments are used for the validation of the model.

Place, publisher, year, edition, pages
2002. Vol. 41, no 11, 1077-1087 p.
Keyword [en]
severe accident, particle bed, coolability, dryout, downcomer, debris
Identifiers
URN: urn:nbn:se:kth:diva-22112ISI: 000179744500006OAI: oai:DiVA.org:kth-22112DiVA: diva2:340810
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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