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Experimental investigation of debris bed quenching with non-condensable gas release
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
2006 (English)In: Energetika, ISSN 0375-8842, Vol. 3, 1-8 p.Article in journal (Refereed) Published
Abstract [en]

A series of experiments were performed at the POMECO (Porous Medium Coolability) facility at the Nuclear Power Safety Division of the Royal Institute of Technology in Stockholm, Sweden. During the experiments, quenching of uniformly heated debris beds of different porosity with air injection from the bottom was investigated. These sets of experiments extend the earlier experiments performed on the POMECO facility and are applicable to ex-vessel coolability phase of a postulated nuclear power plant severe accident in which the attack on concrete generates non-condensable gases which traverse the debris bed. The beds had been heated up to ∼500 °C before a water pool was established on top of the bed. Air was added from the bottom at different flow rates. The results obtained for quench rates and flooding limits showed that for a very low porosity beds (ε = 0.26), the flooding limit is reached with modest air flow rates, while for a usual porosity (ε = 0.38) bed very high air flow rates would be required. The analysis of the experiments showed that the flooding correlations of Marshall-Dhir and Wallis could describe the measured data.

Place, publisher, year, edition, pages
2006. Vol. 3, 1-8 p.
National Category
Energy Engineering
URN: urn:nbn:se:kth:diva-53527ScopusID: 2-s2.0-34548552615OAI: diva2:470249
QC 20120219Available from: 2011-12-28 Created: 2011-12-28 Last updated: 2012-02-19Bibliographically approved

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