NSUF 25-5253: Understanding Early Redistribution Dynamics in U-20Pu-10Zr Fuels Through EPMA

This project aims to elucidate the dynamics of restructuring and element redistribution in U-20Pu-10Zr ternary metallic fuel irradiated to 1.9 at. % burnup. Using electron probe microanalysis (EPMA), we will quantify elemental concentrations across constituent redistribution zones. By combining element maps for broad spatial overview with quantitative line scans for precise compositional data, EPMA will enable targeted, informative analysis. Data collected from the awarded RTE (24-5146) will include complementary techniques such as scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), and transmission electron microscopy (TEM), in conjunction with thermal property measurements using the thermal conductivity microscope (TCM). This integrated approach will precisely link compositional and structural evolution with local variations in material properties. The anticipated duration for the project includes three weeks of instrument time and one day for sample preparation. This research will provide foundational data on the early redistribution dynamics in U-20Pu-10Zr fuels. Such understanding will support more accurate, phase-specific modeling of fuel behavior under irradiation, potentially leading to improved predictions of thermomechanical behavior. The expected outcomes include a comprehensive understanding of the compositional and structural evolution at low burnups, and insights into how plutonium content and constituent redistribution behavior impact swelling.

Informações Adicionais

Campo	Valor
Award Announced Date	2025-08-06T10:08:52.9
Awarded Institution	University of Florida
Facility Tech Lead	Alina Montrose
Irradiation Facility
PI	Allison Probert
PI Email	[email protected]
Project Type	RTE
RTE Number	None