Grain boundary oxidation of pressurized-water reactor spent fuel in air

The grain boundary oxidation of pressurized-water reactor spent fuel in a dry air atmosphere at 195°C was investigated by light optical and scanning electron microscopy (SEM). The oxidation occurred by U 4O 9 formation along the grain boundaries and was visible by anomalous electron backscattering i...

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Bibliographic Details
Published in:Materials characterization 1992-03, Vol.28 (2), p.149-156
Main Authors: Thomas, L.E., Einziger, R.E.
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Exact sciences and technology
Fuels
Nuclear fuels
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Summary:The grain boundary oxidation of pressurized-water reactor spent fuel in a dry air atmosphere at 195°C was investigated by light optical and scanning electron microscopy (SEM). The oxidation occurred by U 4O 9 formation along the grain boundaries and was visible by anomalous electron backscattering in the SEM. Image analysis of samples oxidized to a bulk oxygen-to-uranium ratio of 2.16 indicated U 4O 9 penetration into the prior UO 2 grains at a rate of 4.7 nm/hour.
ISSN:1044-5803
1873-4189
DOI:10.1016/1044-5803(92)90038-J