Bubble morphology in U3Si2 implanted by high-energy Xe ions at 300 °C

Yinbin Miao; Jason Harp; Kun Mo; Shaofei Zhu; Tiankai Yao; Jie Lian; Abdellatif M. Yacout

doi:10.1016/j.jnucmat.2017.07.066

Bubble morphology in U₃Si₂ implanted by high-energy Xe ions at 300 °C

Yinbin Miao, Jason Harp, Kun Mo, Shaofei Zhu, Tiankai Yao, Jie Lian, Abdellatif M. Yacout

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

35 Scopus citations

Abstract

The microstructure modifications of a high-energy Xe implanted U₃Si₂, a promising accident tolerant fuel candidate, were characterized and are reported upon. The U₃Si₂ pellet was irradiated at Argonne Tandem Linac Accelerator System (ATLAS) by an 84 MeV Xe ion beam at 300 °C. The irradiated specimen was then investigated using a series of transmission electron microscopy (TEM) techniques. A dense distribution of bubbles were observed near the range of the 84 MeV Xe ions. Xe gas was also found to accumulate at multiple types of sinks, such as dislocations and grain boundaries. Bubbles aggregated at those sinks are slightly larger than intragranular bubbles in lattice. At 300 °C, the gaseous swelling strain is limited as all the bubbles are below 10 nm, implying the promising fission gas behavior of U₃Si₂ under normal operating conditions in light water reactors (LWRs).

Original language	English
Pages (from-to)	146-153
Number of pages	8
Journal	Journal of Nuclear Materials
Volume	495
DOIs	https://doi.org/10.1016/j.jnucmat.2017.07.066
State	Published - Nov 2017
Externally published	Yes

Funding

This work was funded by the Accident Tolerant Fuel High-Impact Problems (ATF HIP) of the U.S. Department of Energy (DOE)'s Nuclear Energy Advanced Modeling and Simulation (NEAMS) program. This work was supported by the U.S. Department of Energy, Office of Nuclear Energy under a Nuclear Energy University Program (award number DE-NE0008564). The authors would also like to acknowledge the help of Matthew Hendricks on the ATLAS irradiation. This research used resources of Argonne National Laboratories ATLAS facility, which is a DOE Office of Science User Facility. The isotope(s) used in this research were supplied by the United States Department of Energy Office of Science by the Isotope Program in the Office of Nuclear Physics. The efforts involving Argonne National Laboratory were sponsored under Contract no. DE-AC02-06CH11357 between UChicago Argonne, LLC and the U.S. Department of Energy. This work was supported by the U.S. Department of Energy, Office of Nuclear Energy under DOE Idaho Operations Office Contract DE-AC07-051D14517 as part of a Nuclear Science User Facilities experiment.

Funders	Funder number
ATF HIP
Nuclear Energy Advanced Modeling and Simulation
United States Department of Energy Office of Science
U.S. Department of Energy
Office of Science
Office of Nuclear Energy
Nuclear Physics	DE-AC02-06CH11357, DE-AC07-051D14517
Nuclear Energy University Program	DE-NE0008564

Keywords

Fission gas behavior
Ion irradiation
Light water reactor (LWR)
Microstructure characterization
Silicide fuels

Access to Document

10.1016/j.jnucmat.2017.07.066

Cite this

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title = "Bubble morphology in U3Si2 implanted by high-energy Xe ions at 300 °C",

abstract = "The microstructure modifications of a high-energy Xe implanted U3Si2, a promising accident tolerant fuel candidate, were characterized and are reported upon. The U3Si2 pellet was irradiated at Argonne Tandem Linac Accelerator System (ATLAS) by an 84 MeV Xe ion beam at 300 °C. The irradiated specimen was then investigated using a series of transmission electron microscopy (TEM) techniques. A dense distribution of bubbles were observed near the range of the 84 MeV Xe ions. Xe gas was also found to accumulate at multiple types of sinks, such as dislocations and grain boundaries. Bubbles aggregated at those sinks are slightly larger than intragranular bubbles in lattice. At 300 °C, the gaseous swelling strain is limited as all the bubbles are below 10 nm, implying the promising fission gas behavior of U3Si2 under normal operating conditions in light water reactors (LWRs).",

keywords = "Fission gas behavior, Ion irradiation, Light water reactor (LWR), Microstructure characterization, Silicide fuels",

author = "Yinbin Miao and Jason Harp and Kun Mo and Shaofei Zhu and Tiankai Yao and Jie Lian and Yacout, {Abdellatif M.}",

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AU - Miao, Yinbin

AU - Harp, Jason

AU - Mo, Kun

AU - Zhu, Shaofei

AU - Yao, Tiankai

AU - Lian, Jie

AU - Yacout, Abdellatif M.

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AB - The microstructure modifications of a high-energy Xe implanted U3Si2, a promising accident tolerant fuel candidate, were characterized and are reported upon. The U3Si2 pellet was irradiated at Argonne Tandem Linac Accelerator System (ATLAS) by an 84 MeV Xe ion beam at 300 °C. The irradiated specimen was then investigated using a series of transmission electron microscopy (TEM) techniques. A dense distribution of bubbles were observed near the range of the 84 MeV Xe ions. Xe gas was also found to accumulate at multiple types of sinks, such as dislocations and grain boundaries. Bubbles aggregated at those sinks are slightly larger than intragranular bubbles in lattice. At 300 °C, the gaseous swelling strain is limited as all the bubbles are below 10 nm, implying the promising fission gas behavior of U3Si2 under normal operating conditions in light water reactors (LWRs).

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