U.S. Department of Energy

Pacific Northwest National Laboratory

Ion implantation and characterization of epsilon metal phase formation in ceria

Please join us on Thursday, May 5, 2016, from Noon to 1:00 p.m. in the RPL Plutonium Room, when the NPSI will host a monthly Seminar Series featuring LDRD PI Ram Devanathan presenting on project Ion Implantation and Characterization of Epsilon Metal Phase Formation in Ceria.

Research Team: Ram Devanathan, Weilin Jiang, David Abrecht, Richard Clark, and Jon Schwantes

Thursday, May 5, 2016
Dr. Ram Devanathan
Manager, Nuclear Science Division
In the nuclear energy realm, the economic imperative to achieve high burnup of fuel creates the need to understand the effects of metallic phases on the thermal conductivity and mechanical integrity of fuel pellets. This project aims to develop a fundamental understanding of the formation and morphology of the five-metal epsilon phase and related phases in irradiated nuclear fuel based on innovative ion implantation of a surrogate material combined with characterization and modeling. This targeted study will work in concert with another funded project under the NPSI project, "Modeling of interfacial effects, partitioning and production routes of epsilon particles in uranium dioxide," to elucidate whether nuclear fission and decay processes are critical to the formation of epsilon phase particles in spent nuclear fuel during and after reactor operations as proposed in the literature. This work will enhance our understanding of metallic phase formation in nuclear fuel, lead to predictive macro-scale models of phase formation, and produce high-impact journal publications consistent with the goals of the NPSI.
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