Coolability of heat-releasing debris bed. Part 2: Uncertainty of dryout heat flux
2013 (English)In: Annals of Nuclear Energy, ISSN 0306-4549, E-ISSN 1873-2100, Vol. 52, no SI, 72-79 p.Article in journal (Refereed) Published
One-dimensional coolability problem for a flat homogeneous heat-releasing debris bed is considered, with the critical conditions for steady-state cooling characterized by the Dryout Heat Flux (DHF). DHF is determined for top-fed and bottom-fed debris beds from several two-phase models differing by the treatment of porous and interphase drag. Aleatory uncertainties due to randomness of the debris bed formation scenario and respective physical parameters (particle diameter, porosity) are quantified. The influence of ranges and distributions of input parameters on the uncertainty in the DHF are studied. Major contributors to the DHF uncertainty are identified. Influence of model uncertainty on the prediction of the lower boundary for DHF is discussed.
Place, publisher, year, edition, pages
2013. Vol. 52, no SI, 72-79 p.
Debris bed coolability, Drag model, Sensitivity analysis, Two phase flow, Uncertainty analysis
IdentifiersURN: urn:nbn:se:kth:diva-118320DOI: 10.1016/j.anucene.2012.10.012ISI: 000313997700008ScopusID: 2-s2.0-84870398430OAI: oai:DiVA.org:kth-118320DiVA: diva2:605709
FunderEU, European Research Council
QC 201302152013-02-152013-02-142013-02-25Bibliographically approved