Microstructure investigations of U3Si2 implanted by high-energy Xe ions at 600 °C

JOURNAL OF NUCLEAR MATERIALS

卷:503

Article

Miao, Yinbin¹  Harp, Jason²  Mo, Kun¹  Kim, Yeon Soo¹  Zhu, Shaofei¹  Yacout, Abdellatif M.¹ 

[1] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA

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

关键词: U3Si2;    Fission gas behavior;    Ion irradiation;    Light water reactor (LWR);    Microstructure characterization;    Accident tolerant fuel;   

DOI  :  10.1016/j.jnucmat.2018.02.031

来源: Elsevier

【 摘 要 】

The microstructure investigations on a high-energy Xe-implanted U3Si2 pellet were performed. The promising accident tolerant fuel (ATF) candidate, U3Si2, was irradiated by 84 MeV Xe ions at 600 degrees C at Argonne Tandem Linac Accelerator System (ATLAS). The characterizations of the Xe implanted sample were conducted using advanced transmission electron microscopy (TEM) techniques. An oxidation layer was observed on the sample surface after irradiation under the similar to 10(-5) Pa vacuum. The study on the oxidation layer not only unveils the readily oxidation behavior of U3Si2 under high-temperature irradiation conditions, but also develops an understanding of its oxidation mechanism. Intragranular Xe bubbles with bimodal size distribution were observed within the Xe deposition region of the sample induced by 84 MeV Xe ion implantation. At the irradiation temperature of 600 degrees C, the gaseous swelling strain contributed by intragranular bubbles was found to be insignificant, indicating an acceptable fission gas behavior of U3Si2 as a light water reactor (LWR) fuel operating at such a temperature. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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