|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||Alpha Self-Irradiation of Archive and Irradiated Fast Reactor Fuels
||Thierry Wiss, Oliver Dieste, Emanuele De Bona, Dragos Staicu
|On-Site Speaker (Planned)
Mixed Uranium-Plutonium Oxides are suitable fuels for fast reactors and can be used for the transmutation of the radiotoxic minor actinides but also burning of excess plutonium.
The high alpha-activity of the minor actinides lead to the formation of large amount of defects, which will appear even before irradiation in the reactor.
In this work we are reporting on experimental observations of the alpha-damage effects on different minor actinide containing fuel samples. The microstructure of these samples has been investigated by Electron Transmission Microscopy to assess the formation of extended defects. Lattice parameter and strain in damaged samples have been measured as a function of the cumulated alpha dose and the corresponding concentration of point defects estimated. Differential Scanning Calorimetry measurements were also performed on several samples and the stored energy released during anneals attributed to the different type of defects.