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

JOURNAL OF NUCLEAR MATERIALS

卷:495

Article

Miao, Yinbin¹  Harp, Jason²  Mo, Kun¹  Zhu, Shaofei¹  Yao, Tiankai³  Lian, Jie³  Yacout, Abdellatif M.¹ 

[1] Argonne Natl Lab, Lemont, IL 60439 USA

[2] Idaho Natl Lab, Idaho Falls, ID 83415 USA

[3] Rensselaer Polytech Inst, Troy, NY 12180 USA

关键词: Silicide fuels;    Fission gas behavior;    Ion irradiation;    Light water reactor (LWR);    Microstructure characterization;   

DOI  :  10.1016/j.jnucmat.2017.07.066

来源: Elsevier

【 摘 要 】

The microstructure modifications of a high-energy Xe implanted U3Si2, a promising accident tolerant fuel candidate, were characterized and are reported upon. The 3S2 pellet was irradiated at Argonne Tandem Linac Accelerator System (ATLAS) by an 84 MeV Xe ion beam at 300 degrees 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 degrees 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). (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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