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Communication Dans Un Congrès Année : 2016

Coupled Experimental / Numerical Approach to Determine the Creep Behavior of Zr-4 Cladding Under LOCA Condition

Résumé

The thermo-mechanical behavior of Zircaloy-4 fuel rods under Loss-Of-Coolant Accident (LOCA) conditions is investigated. A custom experimental setup is dedicated to the high-temperature creep ballooning study of 90mm long cladding samples. Creep tests were performed under an inert environment (argon), for temperatures from 750 to 850 °C and internal pressures ranging from 1 to 5MPa. As the high-temperature creep of metals is strongly influenced by the temperature, the setup allow for a heterogeneous thermal distribution along the specimen. A unique test provides a rich database about the steady-state creep of the alloy. A first campaign is dedicated to bare Stress Relieved Annealed Zr-4. Creep-rates are computed along a generatrix of the tube using 2-Dimensional Digital Image Correlation (2D-DIC) and are correlated to thermal distribution measurements allowed by Near Infra-Red Thermography (NIRT). As-received Zr-4 behavior laws are determined using Finite Element Model Updating (FEMU). Norton exponents and activation energies are determined for thermal-mechanical conditions of the performed tests.
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hal-01863191 , version 1 (28-08-2018)

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Damien Campello, Nicolas Tardif, Marie-Christine Baietto, Michel Coret, Jean Desquines. Coupled Experimental / Numerical Approach to Determine the Creep Behavior of Zr-4 Cladding Under LOCA Condition. iDICs 2016, Nov 2016, Philadelphia, United States. ⟨10.1007/978-3-319-51439-0_54⟩. ⟨hal-01863191⟩
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