High-energy synchrotron study of in-pile-irradiated U-Mo fuels

SCRIPTA MATERIALIA

卷:114

Article

Miao, Yinbin¹  Mo, Kun¹  Ye, Bei¹  Jamison, Laura¹  Mei, Zhi-Gang¹  Gan, Jian²  Miller, Brandon²  Madden, James²  Park, Jun-Sang¹  Almer, Jonathan¹  Bhattacharya, Sumit³  Kim, Yeon Soo¹  Hofman, Gerard L.¹  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

[3] Northwestern Univ, Evanston, IL 60208 USA

关键词: X-ray diffraction;    Synchrotron radiation;    Superlattice;    Recrystallization;    Metallic nuclear fuel;   

DOI  :  10.1016/j.scriptamat.2015.12.019

来源: Elsevier

【 摘 要 】

Here synchrotron scattering analysis results on U-7wt.%Mo fuel specimens irradiated in the Advanced Test Reactor to three burnup levels (3.0, 5.2, and 63 x 10(21) fission/cm(3)) are reported. Mature fission gas bubble superlattice was observed to form at intermediate burnup. The superlattice constant was determined to be 11.7 and 12.0 nm by wide-angle and small-angle scattering respectively. Grain sub-division takes place throughout the irradiation and causes the collapse of the superlattice at high burnup. The bubble superlattice expands the U-Mo lattice and acts as strong sink for radiation-induced defects. The evolution of dislocation loops was, therefore, suppressed until the bubble superlattice collapsed. (C) 2015 Published by Elsevier Ltd.

【 授权许可】

Free