High-energy synchrotron study of in-pile-irradiated U–Mo fuels. (15th March 2016)

• Record Type: Journal Article
• Authors: Miao, Yinbin; Mo, Kun; Ye, Bei; Jamison, Laura; Mei, Zhi-Gang; Gan, Jian; Miller, Brandon; Madden, James; Park, Jun-Sang; Almer, Jonathan; Bhattacharya, Sumit; Kim, Yeon Soo; Hofman, Gerard L.; Yacout, Abdellatif M.
• Is Part Of: Scripta materialia. Volume 114(2016)
• Page Start: 146
• Page End: 150
• Publication Date: 2016-03-15
• Subjects: X-ray diffraction -- Synchrotron radiation -- Superlattice -- Recrystallization -- Metallic nuclear fuel; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.12.019
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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 6.3 × 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. Graphical abstract: