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An experimental study on quenching of a radially stratified heated porous bed
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Power Safety.
2006 (English)In: Nuclear Engineering and Design, ISSN 0029-5493, E-ISSN 1872-759X, Vol. 236, no 19-21, 2189-2198 p.Article in journal (Refereed) Published
Abstract [en]

The quenching characteristics of a volumetrically-heated particulate bed composed of radially stratified sand layers were investigated experimentally in the POMECO facility. The sand bed simulates the corium particulate debris bed which is formed when the molten corium released from the vessel fragments in water and deposits on the cavity floor during a postulated severe accident in a light water reactor (LWR). The electrically-heated bed was quenched by water from a water column established over top of it, and later also with water coming from its bottom, which was circulating from the water overlayer through downcomers. A series of experiments were conducted to reveal the effects of the size of downcomers, and their locations in the bed, on the quenching characteristics of the radially stratified debris beds. The downcomers were found to significantly increase the bed quenching rate. To simulate the non-condensable gases generated during the MCCI, air and argon were injected from the bottom of the bed at different flow rates. The effects of gas flow rate and its properties on the quenching behaviour were observed. The results indicate that the non-condensable gas flows reduce the quenching rate significantly. The gas properties also affect the quenching characteristics.

Place, publisher, year, edition, pages
2006. Vol. 236, no 19-21, 2189-2198 p.
Keyword [en]
Argon, Light water reactors, Quenching, Radioactive materials, Space debris, Stratigraphy, Condensable gases, Heated particulate bed, Sand bed, Water column
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-37689DOI: 10.1016/j.nucengdes.2006.03.057ISI: 000240074100023ScopusID: 2-s2.0-33746601735OAI: diva2:434932
QC 20110816Available from: 2011-08-16 Created: 2011-08-16 Last updated: 2011-08-16Bibliographically approved

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Nayak, Arun K.Sehgal, Bal RajStepanyan, Armen V.
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