Short Communication: Observation of Initial Burst Release of Fission Gas from High-Burnup UO2 Nuclear Fuel During Thermal Transient

Peter Doyle; Jason Harp

doi:10.1016/j.jnucmat.2023.154582

Short Communication: Observation of Initial Burst Release of Fission Gas from High-Burnup UO₂ Nuclear Fuel During Thermal Transient

Peter Doyle, Jason Harp

Nuclear Fuel Element Performance

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A system was developed and tested to provide a deeper understanding of the fission gas release kinetics from nuclear fuel during thermal transients. Pressure, temperature, spectral data, and optical images were simultaneously collected during resistive sample heating, and all released gases were collected in liquid nitrogen-cooled charcoal traps. Standup testing was performed with a high-burnup nuclear fuel segment from rod section with an average local burnup of 77 GWd/tU. During heating, the segment released approximately 6 ± 2% of generated fission gas inventory after ramp heating to 460°C. Heating ceased when the sample ejected from the holder, as observed by constant imaging.

Original language	English
Article number	154582
Journal	Journal of Nuclear Materials
Volume	584
DOIs	https://doi.org/10.1016/j.jnucmat.2023.154582
State	Published - Oct 2023

Funding

The authors gratefully acknowledge the work of Zachary Burns in initial fuel preparation, David Wilson for assistance with the electrical control box, the hot cell operations team for fuel transport and fueled test execution, and Dylan Richardson for fabrication of the SiC sample holder. This work was funded by the U.S. Department of Energy Office of Nuclear Energy Advanced Fuel Campaign . Notice: This manuscript has been authored by UT-Battelle LLC under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
U.S. Department of Energy Office of Nuclear Energy Advanced Fuel Campaign
U.S. Department of Energy
UT-Battelle	DE-AC05-00OR22725

Keywords

HBFF
LOCA
tFGR

Access to Document

10.1016/j.jnucmat.2023.154582

Cite this

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title = "Short Communication: Observation of Initial Burst Release of Fission Gas from High-Burnup UO2 Nuclear Fuel During Thermal Transient",

abstract = "A system was developed and tested to provide a deeper understanding of the fission gas release kinetics from nuclear fuel during thermal transients. Pressure, temperature, spectral data, and optical images were simultaneously collected during resistive sample heating, and all released gases were collected in liquid nitrogen-cooled charcoal traps. Standup testing was performed with a high-burnup nuclear fuel segment from rod section with an average local burnup of 77 GWd/tU. During heating, the segment released approximately 6 ± 2% of generated fission gas inventory after ramp heating to 460°C. Heating ceased when the sample ejected from the holder, as observed by constant imaging.",

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