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Overview of French RandD on SFR MOX fuel fabrication

Abstract : The manufacturing of the (U,Pu)O$_2$ mixed fuel pellets designed for SFR are being conducted by the french actors CEA with support from ORANO and EDF, carrying out an approach covering all the manufacturing steps, from the implementation of the UO$_2$ and PuO$_2$ actinide oxide powders to the pellet sintering. A reference fabrication process has been proposed, considering the experience feedback from fuel manufacturing for Phénix and SuperPhénix reactors. The recent developments deal with the increase of the Pu content (up to 30%) and the effects of aged Pu (thermal and radiolytic effects) which are among the main challenges to sustain the closed fuel cycle. The R&D focuses firstly on experimental studies to deepen the understanding phenomena involved in the reference process. Further, a physical modelling is developed to build a simulation tool in order to improve the performance of each manufacturing steps in a lab-toplant approach. Modelling and simulations are based on specific experiments (grinding and mixing process, mechanical measurement on tailored actinide powders, microscopic characterisation…). Advances has been achieved in the understanding and modelling of physical phenomena describing the phenomenology of each steps. However, numerous challenges remain today in the modelling.
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Submitted on : Wednesday, May 20, 2020 - 4:44:58 PM
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  • HAL Id : cea-02614137, version 1

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CEA | DEN

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F. Mazaudier, P. Dubuisson. Overview of French RandD on SFR MOX fuel fabrication. Global Top Fuel 2019 - International Nuclear Fuel Cycle Conference, Sep 2019, Seattle, United States. ⟨cea-02614137⟩

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