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Abstract

During a severe reactor accident, molten core material may be released as a stream of melt into a water pool remaining in the lower plenum of the reactor pressure vessel. At IKE a jet fragmentation model has been developed based on the mechanism of stripping of the crests of growing waves produced by shear flow instabilities in a parallel flow configuration. This model has been extended to include film boiling at the surface of a melt jet. According to this model, fragmentation of the jet is predominantly due to the shear flow instabilities induced by liquid or vapour flow at the side-facing jet surface. Experimental results obtained at the JRC-Ispra on the breakup of melt jets with the isothermal system Wood's metal/water support the IKE jet atomisation modelling. The application of this IKE model has been extended to the breakup of Corium jets in water.

Additional information

Authors: SCHINS H, JRC Ispra (IT);HOHMANN H, JRC Ispra (IT);BÜRGER M, University of Stuttgart, Institut für Kernenergetik und Energiesysteme (DE);VON BERG E, University of Stuttgart, Institut für Kernenergetik und Energiesysteme (DE);CHO S H, University of Stuttgart, Institut für Kernenergetik und Energiesysteme (DE);BURGER M, University of Stuttgart, Institut fur Kernenergetik und Energiesysteme (DE)
Bibliographic Reference: Paper presented: Annual Meeting on Nuclear Technology 92, INFORUM, Bonn (DE), May 5-7, 1992
Availability: Available from (1) as Paper EN 36654 ORA
Record Number: 199210372 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en
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