Atom Probe Tomography of Segregation at Grain Boundaries and Gas Bubbles in Neutron Irradiated U-10 wt% Mo Fuel

Authors

Maalavan Arivu, Missouri University of Science and Technology
Andrew Hoffman, Missouri University of Science and Technology
Mukesh Bachhav, Idaho National Laboratory
Assel Aitkaliyeva, University of Florida
Yaqiao Wu, Boise State UniversityFollow
Brandon Miller, Idaho National Laboratory
Dennis Keiser, Idaho National Laboratory
Jian Gan, Idaho National Laboratory
Haiming Wen, Missouri University of Science and Technology

Document Type

Article

Publication Date

6-15-2024

Abstract

During neutron irradiation to fission densities > 5.2 × 10²¹ fiss/cm³, Xe agglomerates forming gas bubbles of varying size within the U-Mo fuel matrix. Herein, segregation of fission products to Xe bubbles and grain boundaries (GB) were studied using atom probe tomography (APT). Segregation behavior was found to vary among GBs, small bubbles (< 10 nm), and larger bubbles (>10 nm). Solid fission products were enriched at GBs and larger bubbles, but not at small bubbles. A denuded zone was identified adjacent to a > 10 nm Xe gas bubble and a GB.

Publication Information

Arivu, Maalavan; Hoffman, Andrew; Bachhav, Mukesh; Aitkaliyeva, Assel; Wu, Yaqiao; Miller, Brandon; . . . and Wen, Haiming. (2024). "Atom Probe Tomography of Segregation at Grain Boundaries and Gas Bubbles in Neutron Irradiated U-10 wt% Mo Fuel". Materials Letters, 365, 136414. https://doi.org/10.1016/j.matlet.2024.136414