Modelling of the Precipitation of Oriented Hydrides During the Storage of Spent Nuclear Fuels
DOI:
https://doi.org/10.70567/mc.v41i18.96Keywords:
Hydrogen, hydrides, reorientation, dry storage, spent nuclear fuelsAbstract
The stress and temperature conditions to which a spent nuclear fuel cladding is subjected during dry storage mean that the hydrogen absorbed during the operation period can precipitate in the form of radially oriented hydrides, which can significantly degrade the mechanical properties of the cladding. This paper presents the implementation of a computational model to simulate the hydride reorientation phenomenon, with the aim of integrating it into the dry storage module of the DIONISIO code. The model was validated through our own experiments, as well as with experiments available in the literature. In general, a good agreement between measured and simulated results was obtained.
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