Nuclear Science

Distribution of metallic fission-product particles in the cladding liner of spent nuclear fuel

R. A. Clark, M. A. Conroy, et al.

Discover groundbreaking insights into noble metal phase fission-product agglomerates and gaseous xenon found in high-burnup UO2 fuel. This research by Richard A. Clark, Michele A. Conroy, Timothy G. Lach, Edgar C. Buck, Kristi L. Pellegrini, Bruce K. McNamara, and Jon M. Schwantes reveals significant findings with important implications for long-term storage and disposal of nuclear materials.

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Abstract

Observations of noble metal phase fission-product agglomerates and gaseous xenon within the fuel-cladding interaction (FCI) zone of a high-burnup UO2 fuel are presented. These agglomerates, ranging from nanometer to micrometer scale, contain Mo, Ru, Tc, Rh, and Pd, with significant Te associated with Pd. The presence of these particles in the oxidized Zr liner suggests previously unknown processes during reactor operation, with implications for long-term storage and disposal.

Publisher

npj Materials Degradation

Published On

Jan 30, 2020

Authors

Richard A. Clark, Michele A. Conroy, Timothy G. Lach, Edgar C. Buck, Kristi L. Pellegrini, Bruce K. McNamara, Jon M. Schwantes

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