tailieunhanh - Modelling FeCrAl cladding thermo-mechanical performance. Part I: Steady-state conditions

This paper provides an integral characterization of FeCrAl cladding under steady-state conditions up to high burnup, highlighting the major differences with respect to Zircaloy-4 and the key properties responsible for their distinct behaviour. | Progress in Nuclear Energy 153 2022 104417 Contents lists available at ScienceDirect Progress in Nuclear Energy journal homepage locate pnucene Modelling FeCrAl cladding thermo-mechanical performance. Part I Steady-state conditions n a b Francisco Feria a Luis E. Herranz a Pau Arago a CIEMAT Unit of Nuclear Safety Research Av. Complutense 40 Madrid 28040 Spain b Universidad Polit ecnica de Madrid UPM Energy Engineering Department Jos e Guti errez Abascal 2 Madrid 28006 Spain A R T I C L E I N F O A B S T R A C T Keywords Among the challenges posed by accident-tolerant fuels ATFs is the demonstration of their safe behaviour under Fuel safety normal and postulated accident conditions. In order to accurately predict the response of novel materials in such Accident tolerant fuel scenarios the development of modelling capabilities is paramount. This paper provides an integral character Fuel performance modelling ization of FeCrAl cladding under steady-state conditions up to high burnup highlighting the major differences FeCrAl with respect to Zircaloy-4 and the key properties responsible for their distinct behaviour. To that end the fuel performance code has been extended to FeCrAl cladding simulation. Such extension has been carried out according to a critical review of the thermo-mechanical data and correlations reported in the open literature for several FeCrAl alloys. The main outcome of this study is that there are no major performance differences between FeCrAl and Zircaloy-4 at end-of-life except for their stress states which differ due to different creep deformation rates. Therefore modelling the thermo-mechanical response of FeCrAl cladding would benefit from an accurate description of its creep behaviour not only in the case of foreseeable conditions during reactor operation but also for the potential implications that it may have under transient scenarios. 1. Introduction degradation and failure mechanisms Geelhood and Luscher .

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