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Title: An Exploration of Measuring Lower-Length-Scale Structures in Nuclear Materials: Thermal Conductivity of U-Mo Fuel Particle

Abstract

The feasibility of utilizing the suspended bridge method, which was originally developed for one-dimensional or nearly-one-dimensional nanomaterials, to measure the thermal conductivity of lower-length-scale structures in nuclear materials is explored in this study. Nanoribbon specimens of stainless steel SS304, representing materials with well-known thermal conductivity, and atomized U-Mo alloy particles used in dispersion fuels for research reactors, representing new nuclear materials with limited thermal conductivity data reported, were made using focused ion beam (FIB). The contact thermal resistance was corrected by measuring a series of specimens with different bridge lengths. The measured thermal conductivity of SS304 was found to be consistent with that reported for bulk samples. The thermal conductivity of U-Mo particles measured using the suspended bridge method was also analyzed and compared with literature data of monolithic U-Mo alloys. Ab initio molecular dynamics (AIMD) was used to quantitatively demonstrate that the reduced specimen size only has marginal effects on the measured thermal conductivity compared to the bulk specimens. The novel concept of utilizing the suspended bridge method in nuclear material research is proven and future work is discussed.

Authors:
 [1];  [2];  [2];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. of Illinois at Urbana-Champaign, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1606398
Alternate Identifier(s):
OSTI ID: 1691661
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 527; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; dispersion fuel; microstructure characterization; nanotechnology; thermal conductivity

Citation Formats

Miao, Yinbin, Rajagopal, Manjunath C., Valavala, Krishna, Mo, Kun, Mei, Zhi-Gang, Bhattacharya, Sumit, Jamison, Laura, Sinha, Sanjiv, and Yacout, Abdellatif M.. An Exploration of Measuring Lower-Length-Scale Structures in Nuclear Materials: Thermal Conductivity of U-Mo Fuel Particle. United States: N. p., 2019. Web. https://doi.org/10.1016/j.jnucmat.2019.151797.
Miao, Yinbin, Rajagopal, Manjunath C., Valavala, Krishna, Mo, Kun, Mei, Zhi-Gang, Bhattacharya, Sumit, Jamison, Laura, Sinha, Sanjiv, & Yacout, Abdellatif M.. An Exploration of Measuring Lower-Length-Scale Structures in Nuclear Materials: Thermal Conductivity of U-Mo Fuel Particle. United States. https://doi.org/10.1016/j.jnucmat.2019.151797
Miao, Yinbin, Rajagopal, Manjunath C., Valavala, Krishna, Mo, Kun, Mei, Zhi-Gang, Bhattacharya, Sumit, Jamison, Laura, Sinha, Sanjiv, and Yacout, Abdellatif M.. Sun . "An Exploration of Measuring Lower-Length-Scale Structures in Nuclear Materials: Thermal Conductivity of U-Mo Fuel Particle". United States. https://doi.org/10.1016/j.jnucmat.2019.151797. https://www.osti.gov/servlets/purl/1606398.
@article{osti_1606398,
title = {An Exploration of Measuring Lower-Length-Scale Structures in Nuclear Materials: Thermal Conductivity of U-Mo Fuel Particle},
author = {Miao, Yinbin and Rajagopal, Manjunath C. and Valavala, Krishna and Mo, Kun and Mei, Zhi-Gang and Bhattacharya, Sumit and Jamison, Laura and Sinha, Sanjiv and Yacout, Abdellatif M.},
abstractNote = {The feasibility of utilizing the suspended bridge method, which was originally developed for one-dimensional or nearly-one-dimensional nanomaterials, to measure the thermal conductivity of lower-length-scale structures in nuclear materials is explored in this study. Nanoribbon specimens of stainless steel SS304, representing materials with well-known thermal conductivity, and atomized U-Mo alloy particles used in dispersion fuels for research reactors, representing new nuclear materials with limited thermal conductivity data reported, were made using focused ion beam (FIB). The contact thermal resistance was corrected by measuring a series of specimens with different bridge lengths. The measured thermal conductivity of SS304 was found to be consistent with that reported for bulk samples. The thermal conductivity of U-Mo particles measured using the suspended bridge method was also analyzed and compared with literature data of monolithic U-Mo alloys. Ab initio molecular dynamics (AIMD) was used to quantitatively demonstrate that the reduced specimen size only has marginal effects on the measured thermal conductivity compared to the bulk specimens. The novel concept of utilizing the suspended bridge method in nuclear material research is proven and future work is discussed.},
doi = {10.1016/j.jnucmat.2019.151797},
journal = {Journal of Nuclear Materials},
number = ,
volume = 527,
place = {United States},
year = {2019},
month = {12}
}

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