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DOI: 10.1615/ICHMT.1995.RadTransfProcHeatMassTransfSevNuclReactAcc.120

C. Jamond
IPSN/CEA,CE-Cadarache, France

B. Adroguer
IPSN/CEA,CE-Cadarache, France

S. Bourdon
IPSN/CEA,CE-Cadarache, France

S. Ederli
ENEA, Casaccia-Roma

G. Repetto
IPSN/CEA,CE-Cadarache, France


The aim of the international PHEBUS FP Programme is to investigate in an in-pile facility various phenomena governing degradation of fuel as well as release, transportation and deposition of fission products in LWR severe accident conditions. This paper gives a summary on the current analysis of the core degradation aspect of the first FPTO test using ICARE 2. Results show a core degradation far beyond any other test that has been performed in the past. The preliminary interpretation illustrates difficulties to analyse complex phenomena which characterise the late phase degradation phase such as loss of rod-like geometry and large molten pool formation. Weaknesses in current models to predict severe degradation are identified.

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