|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||Changes in the Starting Microstructures of U-Mo Fuels due to the Effects of Neutron Irradiation
||Dennis D. Keiser, Brandon Miller, Jan-Fong Jue, Adam Robinson, Kelley Verner
|On-Site Speaker (Planned)
||Dennis D. Keiser
The Materials Management and Minimization Reactor Conversion Fuel Qualification Program is developing low enriched U-Mo fuels to replace the use of fuels containing highly enriched uranium. A monolithic and dispersion fuel is being developed. As part of this development, U-Mo fuel plates have been irradiated in the Advanced Test Reactor under a variety of conditions and then characterized using scanning electron microscopy transmission electron microscopy, and other techniques. Based on this characterization, changes that occur in the starting microstructures of both fuel types, due to the effects of irradiation, have been identified. This presentation will describe the microstructural evolution that occurs and how data that have been generated can be employed to better model the behavior of U-Mo fuels during irradiation. Examples of data about U-Mo alloys that have been produced include those related to: amorphization, recrystallization/polygonization, fission product phase development, and changes in fission gas bubble size/distribution/morphology.