|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Materials Science and Engineering for Nuclear Energy
||Effect of Dopants on Uranium-based Metallic Fuels to Mitigate Fuel-cladding Chemical Interactions
||Rabi Khanal, Nathan Jerred, Michael Benson, Robert Mariani, Indrajit Charit, Samrat Choudhury
|On-Site Speaker (Planned)
Lanthanide (e.g., Nd, Ce, Pr and La) fission products in the uranium-based metallic fuel can chemically interact with steel claddings, known as fuel-cladding-chemical interaction (FCCI). The FCCI leads to decreased cladding integrity and eventual rupture of the cladding. Detrimental lanthanides may be arrested within the metallic fuel matrix by forming intermetallic compounds with externally added dopants. Here, we will present an integrated theoretical and experimental approach to screen dopants for effective capture of lanthanides within the uranium matrix. Based on electronic structures calculations, it is concluded that arsenic and selenium can serve as potential dopants to effectively arrest the lanthanides within the uranium matrix. Finally, we will present experimentally observed microstructure and phase stability of As or Se doped U-metallic fuel in presence of lanthanide like Nd to assess the effectiveness of these dopants in immobilizing Nd within the uranium matrix. This research is being funded by DOE-NEUP, DE-NE0008557.
||Planned: Supplemental Proceedings volume