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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Barrachin, Marc
Institut de Radioprotection et de Sûreté Nucléaire
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Revisiting the thermodynamic properties of the ZrCr2 Laves phases by combined approach using experimental and simulation methodscitations
- 2021Hafnium Oxidation at High Temperature in Steamcitations
- 2019Critical evaluation of experimental data of solution enthalpy of zirconium in liquid aluminumcitations
- 2019Interrupted heating DTA for liquidus temperature determination of Ag–Cd–In alloyscitations
- 2019Hafnium Oxidation in steam at high Temperature
- 2016Core melt composition at Fukushima Daiichi Results of transient simulations with ASTECcitations
- 2014Fuel and fission product behaviour in early phases of a severe accident. Part II Interpretation of the experimental results of the PHEBUS FPT2 testcitations
- 2014Oxidation effect on steel corrosion and thermal loads during corium melt in-vessel retentioncitations
- 2014Fuel and fission product behaviour in early phases of a severe accident. Part I Experimental results of the PHEBUS FPT2 testcitations
- 2013Late phase fuel degradation in the Phébus FP testscitations
- 2013Early phase fuel degradation in Phébus FP: Initiating phenomena of degradation in fuel bundle testscitations
- 2011Ternary eutectics in the systems FeO-UO2-ZrO2 and Fe2O3-U3O8-ZrO2citations
- 2011First-principles study of defect behavior in irradiated uranium monocarbidecitations
- 2007Phase diagram of the UO2-FeO1+x systemcitations
- 2007Progress in nuclear thermodynamic databanking for MCCI applications
- 2006Phase relations in the ZrO2-FeO systemcitations
- 2006Phase diagram of the ZrO2-FeO systemcitations
Places of action
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article
Fuel and fission product behaviour in early phases of a severe accident. Part II Interpretation of the experimental results of the PHEBUS FPT2 test
Abstract
One objective of the FPT2 test of the PHEBUS FP Program was to study the degradation of an irradiated UO2 fuel bundle and the fission product behaviour under conditions of low steam flow. The results of the post-irradiation examinations (PIE) at the upper levels (823 mm and 900 mm) of the test section previously reported are interpreted in the present paper. Solid state interactions between fuel and cladding have been compared with the characteristics of interaction identified in the previous separate-effect tests. Corium resulting from the interaction between fuel and cladding was formed. The uranium concentration in the corium is compared to analytical tests and a scenario for the corium formation is proposed. The analysis showed that, despite the rather low fuel burn up, the conditions of temperature and oxygen potential reached during the starvation phase are able to give an early very significant release fraction of caesium. A significant part (but not all) of the molybdenum was segregated at grain boundaries and trapped in metallic inclusions from which they were totally removed in the final part of the experiment. During the steam starvation phase, the conditions of oxygen potential were favourable for the formation of simple Ba and BaO chemical forms but the temperature was too low to provoke their volatility. This is one important difference with out-of-pile experiments such as VERCORS for which only a combination of high temperature and low oxygen potential induced a significant barium release. Finally another significant difference with analytical out-of-pile experiments comes from the formation of foamy zones due to the fission gas presence in FPT2-type experiments which give an additional possibility for the formation of stable fission product compounds. © 2014 Elsevier B.V. All rights reserved.