A reduced order model for fission gas diffusion in columnar grains

D. Pizzocri; M. Di Gennaro; T. Barani; F. A.B. Silva; G. Zullo; S. Lorenzi; A. Cammi

doi:10.1016/j.net.2023.07.013

A reduced order model for fission gas diffusion in columnar grains

D. Pizzocri (Corresponding author), M. Di Gennaro, T. Barani, F. A.B. Silva, G. Zullo, S. Lorenzi, A. Cammi

Computational Science

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In fast reactors, restructuring of the fuel micro-structure driven by high temperature and high temperature gradient can cause the formation of columnar grains. The non-spheroidal shape and the non-uniform temperature field in such columnar grains implies that standard models for fission gas diffusion can not be applied. To tackle this issue, we present a reduced order model for the fission gas diffusion process which is applicable in different geometries and with non-uniform temperature fields, maintaining a computational requirement in line with its application in fuel performance codes. This innovative application of reduced order models as meso-scale tools within fuel performance codes represents a first-of-a-kind achievement that can be extended beyond fission gas behaviour.

Originele taal-2	Engels
Pagina's (van-tot)	3983-3995
Aantal pagina's	13
Tijdschrift	Nuclear Engineering and Technology
Volume	55
Nummer van het tijdschrift	11
DOI's	https://doi.org/10.1016/j.net.2023.07.013
Status	Gepubliceerd - nov. 2023

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Publisher Copyright:
© 2023 Korean Nuclear Society

Financiering

This research activity has received funding from the Euratom research and training programme 2017-2021 through the INSPYRE Project under grant agreement No. 754329 and from the Euratom research and training programme 2020-2024 through the PATRICIA project under grant agreement No. 945077 . The authors are grateful to A.G. Carloni.

Financiers	Financiernummer
European Union’s Horizon Europe research and innovation programme	754329, 945077

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10.1016/j.net.2023.07.013

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author = "D. Pizzocri and {Di Gennaro}, M. and T. Barani and Silva, {F. A.B.} and G. Zullo and S. Lorenzi and A. Cammi",

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AU - Pizzocri, D.

AU - Di Gennaro, M.

AU - Barani, T.

AU - Silva, F. A.B.

AU - Zullo, G.

AU - Lorenzi, S.

AU - Cammi, A.

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AB - In fast reactors, restructuring of the fuel micro-structure driven by high temperature and high temperature gradient can cause the formation of columnar grains. The non-spheroidal shape and the non-uniform temperature field in such columnar grains implies that standard models for fission gas diffusion can not be applied. To tackle this issue, we present a reduced order model for the fission gas diffusion process which is applicable in different geometries and with non-uniform temperature fields, maintaining a computational requirement in line with its application in fuel performance codes. This innovative application of reduced order models as meso-scale tools within fuel performance codes represents a first-of-a-kind achievement that can be extended beyond fission gas behaviour.

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A reduced order model for fission gas diffusion in columnar grains

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