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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 light water reactor (LWR) severe accident conditions. This paper gives a summary on the current analysis of the core degradation aspect of the first FPTO test using ICARE2 code. Results show a core degradation far beyond any other test that has been performed in the past. The current interpretation illustrates difficulties to analyse complex phenomena which characterize the late phase of core degradation such as loss of rod-like geometry and large molten pool formation. The overall movement of material during the test is largely understood. Weaknesses in current models to predict severe degradation are identified and new development efforts are launched. Lessons learnt from FPTO are applied in preparing the next FPT1 test.

Additional information

Authors: ADROGUER B, IPSN, CEN Cadarache, Saint-Paul-lez-Durance (FR);JAMOND C, IPSN, CEN Cadarache, Saint-Paul-lez-Durance (FR);BOURDON S, IPSN, CEN Cadarache, Saint-Paul-lez-Durance (FR);RÉPETTO G, IPSN, CEN Cadarache, Saint-Paul-lez-Durance (FR);EDERLI S, ENEA, CentroRicherche Energia Frascati, Roma (IT);SHEPHERD I, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Technical Committee on Behaviour of LWR Core Materials under Accident Conditions, Dimitrovgrad (SU), October 9-13, 1995
Availability: Available from (1) as Paper EN 39457 ORA
Record Number: 199512093 / Last updated on: 1996-01-15
Original language: en
Available languages: en
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