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Title: Effect of High Si Content on U 3Si 2 Fuel Microstructure

Abstract

The development of U 3Si 2 as an accident tolerant nuclear fuel has gained research interest due to its promising high uranium density and improved thermal properties. In the present study, three samples of U 3Si 2 fuel with varying silicon content have been fabricated by a conventional powder metallurgical route. Microstructural characterization via scanning and transmission electron microscopy reveals the presence of other stoichiometry of uranium silicide such as USi and UO 2 in both samples. The detailed phase analysis by x-ray diffraction shows the presence of secondary phases, such as USi, U 3Si, and UO 2. The samples with higher concentrations of silicon content of 7.5 wt.% displays additional elemental Si. Furthermore, these samples also possess an increased amount of the USi phase as compared to that in the conventional sample with 7.3 wt.% silicon. The optimization of U 3Si 2 fuel performance through the understanding of the role of Si content on its microstructure has been discussed.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1562900
Report Number(s):
INL/JOU-17-43263-Rev000
Journal ID: ISSN 1047-4838
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 70; Journal Issue: 2; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; e fuel cycle & development program; Scanning transmission electron microscopy; X-ray diffraction spectroscopy; x-ray spectroscopy; energy dispersive spectroscopy

Citation Formats

Rosales, Jhonathan, van Rooyen, Isabella J., Meher, Subhashish, Hoggan, Rita, Parga, Clemente, and Harp, Jason. Effect of High Si Content on U3Si2 Fuel Microstructure. United States: N. p., 2017. Web. doi:10.1007/s11837-017-2654-6.
Rosales, Jhonathan, van Rooyen, Isabella J., Meher, Subhashish, Hoggan, Rita, Parga, Clemente, & Harp, Jason. Effect of High Si Content on U3Si2 Fuel Microstructure. United States. doi:10.1007/s11837-017-2654-6.
Rosales, Jhonathan, van Rooyen, Isabella J., Meher, Subhashish, Hoggan, Rita, Parga, Clemente, and Harp, Jason. Thu . "Effect of High Si Content on U3Si2 Fuel Microstructure". United States. doi:10.1007/s11837-017-2654-6. https://www.osti.gov/servlets/purl/1562900.
@article{osti_1562900,
title = {Effect of High Si Content on U3Si2 Fuel Microstructure},
author = {Rosales, Jhonathan and van Rooyen, Isabella J. and Meher, Subhashish and Hoggan, Rita and Parga, Clemente and Harp, Jason},
abstractNote = {The development of U3Si2 as an accident tolerant nuclear fuel has gained research interest due to its promising high uranium density and improved thermal properties. In the present study, three samples of U3Si2 fuel with varying silicon content have been fabricated by a conventional powder metallurgical route. Microstructural characterization via scanning and transmission electron microscopy reveals the presence of other stoichiometry of uranium silicide such as USi and UO2 in both samples. The detailed phase analysis by x-ray diffraction shows the presence of secondary phases, such as USi, U3Si, and UO2. The samples with higher concentrations of silicon content of 7.5 wt.% displays additional elemental Si. Furthermore, these samples also possess an increased amount of the USi phase as compared to that in the conventional sample with 7.3 wt.% silicon. The optimization of U3Si2 fuel performance through the understanding of the role of Si content on its microstructure has been discussed.},
doi = {10.1007/s11837-017-2654-6},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 2,
volume = 70,
place = {United States},
year = {2017},
month = {11}
}

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Figures / Tables:

Table I Table I: Key manufacturing parameters for U3Si2 pellets used in this study.

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Works referenced in this record:

Irradiation behaviour of uranium silicide compounds
journal, February 2004


Thermal compatibility studies of U3Si2 dispersion fuels prepared with centrifugally atomized powder
journal, April 1999


Mechanochemical synthesis of uranium sesquisilicide
journal, August 2014


Thermophysical properties of U 3 Si 2 to 1773 K
journal, September 2015


Development of powder metallurgy technique for synthesis of U3Si2 dispersoid
journal, December 2008


Uranium silicide pellet fabrication by powder metallurgy for accident tolerant fuel evaluation and irradiation
journal, November 2015


Microstructure studies of interdiffusion behavior of U3Si2/Zircaloy-4 at 800 and 1000 °C
journal, April 2017


Characteristics of U 3 Si and U 3 Si 2 Powders Prepared by Centrifugal Atomization
journal, December 1997


    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.