|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accident Tolerant Fuels for Light Water Reactor
||Microstructure Characterization of U3Si2 Irradiated by High-energy Ions at LWR Temperatures
||Yinbin Miao, Jason Harp, Kun Mo, Shaofei Zhu, Abdellatif M Yacout
|On-Site Speaker (Planned)
High-energy ion irradiation was utilized to replicate radiation-induced microstructural modifications in U3Si2, a promising ATF candidate, in LWRs. U3Si2 pellets were irradiated by 84 MeV Xe ions at three LWR temperatures (300C/450C/600C). Two irradiation fluences were selected to respectively reproduce the typical Xe concentration (1.38E17 ions/cm^2) and displacement damage (6.90E17 ions/cm^2) of ~5%FIMA fuels. TEM lamellae were fabricated using FIB. Both conventional TEM and analytic STEM techniques were adopted to investigate the radiation-induced microstructural modifications in the irradiated specimens. Morphologies of both intragranular and intergranular bubbles were analyzed, while the characteristics of dislocations, subgrain boundaries, and precipitates were also examined. The majority of implanted Xe was found to be retained within the specimens, implying improved fission gas behavior of U3Si2 in LWRs. The quantitative results collected in this study will be valuable experimental references for the verification and validation efforts of advanced fuel performance codes development for U3Si2.
||Planned: Supplemental Proceedings volume