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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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Steinbrück, Martin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (35/35 displayed)
- 2024Decoding the oxidation mechanism of Zircaloy-4 via in situ synchrotron X-ray diffraction and computational elucidation
- 2024Phase formation, structure and properties of quaternary MAX phase thin films in the Cr-V-C-Al system: A combinatorial study
- 2023Synthesis of V2AlC thin films by thermal annealing of nanoscale elemental multilayered precursors : Incorporation of layered Ar bubbles and impact on microstructure formationcitations
- 2023Synthesis of V$_{2}$AlC thin films by thermal annealing of nanoscale elemental multilayered precursors: Incorporation of layered Ar bubbles and impact on microstructure formation
- 2023Nitriding model for zirconium based fuel cladding in severe accident codescitations
- 2023Analysis of iron-chromium-aluminum samples exposed to accident conditions followed by quench in the QUENCH-19 experiment
- 2022Phase formation and thermal stability of quaternary MAX phase thin films in the Cr-V-C-Al system: an experimental combinatorial study
- 2022The Effect of Annealing Temperature on the Microstructure and Properties of Cr–C–Al Coatings on Zircaloy-4 for Accident-Tolerant Fuel (ATF) Applicationscitations
- 2022Oxidation of silicon carbide composites for nuclear applications at very high temperatures in steamcitations
- 2022Results of metallographic analysis of the QUENCH-20 bundle with B4C absorber
- 2022Results of metallographic analysis of the QUENCH-20 bundle with B₄C absorber
- 2021Development of Cr-C-Al based coatings for enhanced accident tolerant fuel (ATF) zirconium-based alloy cladding
- 2021High-temperature oxidation and hydrothermal corrosion of textured Cr$_{2}$AlC-based coatings on zirconium alloy fuel cladding
- 2020High-Temperature Oxidation of Chrome-Nickel Alloycitations
- 2020Investigation of corrosion and high temperature oxidation of promising ATF cladding materials in the framework of the Il trovatore project
- 2018High-temperature interaction of oxygen-preloaded Zr1Nb alloy with nitrogencitations
- 2018H2 PERMEATION BEHAVIOR OF Cr2AlC AND Ti2AlC MAX PHASE COATED ZIRCALOY-4 BY NEUTRON RADIOGRAPHYcitations
- 2018H2 PERMEATION BEHAVIOR OF Cr2AlC AND Ti2AlC MAX PHASE COATED ZIRCALOY-4 BY NEUTRON RADIOGRAPHYcitations
- 2018Magnetron-sputtered Al-containing MAX phase carbide thin films and their application as oxidation-resistant coatings
- 2017High-temperature interaction of oxygen-preloaded Zr1Nb alloy with nitrogen
- 2017Nanocrystalline diamond protects Zr cladding surface against oxygen and hydrogen uptake : Nuclear fuel durability enhancementcitations
- 2017Lessons learned from the QUENCH-LOCA experiments
- 2017Update of the QUENCH program
- 2017UK Research in LOCA-Related Activities and Co-operation with the Karlsruhe Research Centre - A Historical Perspective
- 2016Oxidation and hydrogen uptake during high-temperature reaction of zirconium alloys in steam-nitrogen mixtures
- 2016High-temperature oxidation of SiC-Ta-SiC sandwich cladding tubes in GFR atmosphere
- 2013Results of the QUENCH-16 Bundle Experiment on Air Ingress (KIT Scientific Reports ; 7634)
- 2012Oxidation of zirconium alloys in mixed atmospheres containing nitrogen
- 2012Selected aspects of materials behavior during severe nuclear accidents in nuclear reactors
- 2012High-temperature oxidation and mutual interactions of materials during severe nuclear accidents
- 2012Separate effects experiments in the framework of the QUENCH program at KIT
- 2012Materials behavior during the early phase of a severe nuclear accident
- 2011Results of Severe Fuel Damage Experiment QUENCH-15 with ZIRLO cladding tubes. (KIT Scientific Reports ; 7576)
- 2010Separate-effects tests on the investigation of high-temperature oxidation behavior and mechanical properties of Zircaloy-2 to be used in the SFP PWR tests : Report prepared in the framework of the OECD/NEA SFP Project
- 2007Prototypical experiments on air oxidation of zircaloy-4 at high temperatures
Places of action
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document
Oxidation of zirconium alloys in mixed atmospheres containing nitrogen
Abstract
Zirconium (Zr) alloys are widely used in nuclear and chemical industries because of their low neutron absorption and their excellent mechanical and corrosion properties under operational conditions. One drawback of these materials is their high oxidation potential at elevated temperatures. Oxidation of Zr in steam causes embrittlement and is a considerable source of hydrogen and heat. The oxidation and reaction behavior of Zr alloys at high temperatures, relevant for nuclear design-basis and beyond design-basis accident scenarios, has been under investigation at Karlsruhe Institute of Technology for many years. Recently, these activities have been intensified again in the frame of the worldwide research on advanced cladding alloys, new LOCA embrittlement criteria and air ingress scenarios. The most prototypic atmosphere during nuclear accidents is steam; but scenarios with ingress of ambient air or nitrogen, which is used for containment inertization or emergency water pressurizing systems, are under discussion, too. The oxidation kinetics of Zr in steam is mainly determined by the formation of a more or less protective oxide scale. A parabolic rate law describes this behavior and corresponding correlations are included in most computer codes for simulation of nuclear accidents. Nitrogen strongly affects the oxidation mechanism and kinetics by the formation of zirconium nitride at the metal-oxide phase boundary and its re-oxidation with progressing reaction. Due to the significantly different densities of the involved phases the oxide scale becomes porous and non-protective and the oxidation kinetics switch from parabolic to linear ones. As a result, the degradation of the cladding tubes is strongly accelerated and their barrier effect against the release of fission products is lost much earlier. This paper summarizes extensive KIT work in this field, compares the reaction of Zr alloys in various atmospheres and briefly discusses the different reaction mechanisms.