Core melt solidification phenomena during external reactor vessel cooling is investigated in LIVE tests with different external cooling conditions and melt pouring positions. A non-eutectic simulant melt (80-20 mole% KNO3-NaNO3) is used in the LIVE tests. It is found out that when the vessel is cooled with water at the beginning of the melt pouring, the cooling is more effective than in the case of delayed water cooling condition, in which the vessel is first cooled with air and then flooded by water. The initial water cooling leads to a faster growth of crust layer, lower crust thermal conductivity and thinner crust layer than those under the delayed water cooling condition. The initial water cooling leads also to higher heat flux through the vessel wall during the steady state and shorter crust growth period in comparison with the delayed water cooling condition. The solidification of the melt is probably under supercooling condition. The pouring position near the vessel wall results in considerable asymmetric heat flux distribution at one latitude. The heat flux at the position of melt pouring is higher than the one at other locations.
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17th International Conference on Nuclear Engineering
July 12–16, 2009
Brussels, Belgium
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-4352-9
PROCEEDINGS PAPER
Core Melt Solidification Characteristics in RPV Lower Head: Experimental Results From LIVE-Tests
Xiaoyang Gaus-Liu,
Xiaoyang Gaus-Liu
Forschungszentrum Karlsruhe, Karlsruhe, Germany
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Alexei Miassoedov,
Alexei Miassoedov
Forschungszentrum Karlsruhe, Karlsruhe, Germany
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Thomas Cron,
Thomas Cron
Forschungszentrum Karlsruhe, Karlsruhe, Germany
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Jerzy Foit,
Jerzy Foit
Forschungszentrum Karlsruhe, Karlsruhe, Germany
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Thomas Wenz,
Thomas Wenz
Forschungszentrum Karlsruhe, Karlsruhe, Germany
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Silke Schmidt-Stiefel
Silke Schmidt-Stiefel
Forschungszentrum Karlsruhe, Karlsruhe, Germany
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Xiaoyang Gaus-Liu
Forschungszentrum Karlsruhe, Karlsruhe, Germany
Alexei Miassoedov
Forschungszentrum Karlsruhe, Karlsruhe, Germany
Thomas Cron
Forschungszentrum Karlsruhe, Karlsruhe, Germany
Jerzy Foit
Forschungszentrum Karlsruhe, Karlsruhe, Germany
Thomas Wenz
Forschungszentrum Karlsruhe, Karlsruhe, Germany
Silke Schmidt-Stiefel
Forschungszentrum Karlsruhe, Karlsruhe, Germany
Paper No:
ICONE17-75450, pp. 533-540; 8 pages
Published Online:
February 25, 2010
Citation
Gaus-Liu, X, Miassoedov, A, Cron, T, Foit, J, Wenz, T, & Schmidt-Stiefel, S. "Core Melt Solidification Characteristics in RPV Lower Head: Experimental Results From LIVE-Tests." Proceedings of the 17th International Conference on Nuclear Engineering. Volume 2: Structural Integrity; Safety and Security; Advanced Applications of Nuclear Technology; Balance of Plant for Nuclear Applications. Brussels, Belgium. July 12–16, 2009. pp. 533-540. ASME. https://doi.org/10.1115/ICONE17-75450
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