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Title: New method for analysis of X-ray computed tomography scans of TRISO fuel forms

Abstract

X-ray computed tomography (XCT) is a powerful characterization tool that has been used for examination of both tristructural-isotropic (TRISO) coated particles and fuel forms. Rapid, nondestructive imaging of complete specimens by XCT provides significant characterization advantages in both speed and comprehensiveness over traditional materialographic methods. This paper discusses a method that has been developed to analyze XCT images of pebble fuel forms containing ~18,000 TRISO particles each. The XCT images are three-dimensional with contrast based on relative x-ray transparency. In the case of TRISO fuel forms, XCT image intensity distinguishes between the high-density kernel, the medium-density SiC, and the low-density matrix and carbon layers. Image analysis software has been developed to process XCT data sets to extract spatial distribution information, including particle nearest-neighbor distances, local packing fraction, and fuel-free zone thickness in TRISO fuel forms. Finally, although this type of high-resolution XCT analysis is likely not feasible as a quality control measurement for commercial TRISO fuel, it is highly useful in generating feedback for the development of fuel form fabrication processes.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [2];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); X Energy LLC, Greenbelt, MD (United States)
  3. X Energy LLC, Greenbelt, MD (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1649605
Alternate Identifier(s):
OSTI ID: 1646729
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Engineering and Design
Additional Journal Information:
Journal Volume: 357; Journal ID: ISSN 0029-5493
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS

Citation Formats

Helmreich, Grant, Hunn, John D., Brown, Daniel, and Blamer, Brandon. New method for analysis of X-ray computed tomography scans of TRISO fuel forms. United States: N. p., 2019. Web. https://doi.org/10.1016/j.nucengdes.2019.110418.
Helmreich, Grant, Hunn, John D., Brown, Daniel, & Blamer, Brandon. New method for analysis of X-ray computed tomography scans of TRISO fuel forms. United States. https://doi.org/10.1016/j.nucengdes.2019.110418
Helmreich, Grant, Hunn, John D., Brown, Daniel, and Blamer, Brandon. Wed . "New method for analysis of X-ray computed tomography scans of TRISO fuel forms". United States. https://doi.org/10.1016/j.nucengdes.2019.110418. https://www.osti.gov/servlets/purl/1649605.
@article{osti_1649605,
title = {New method for analysis of X-ray computed tomography scans of TRISO fuel forms},
author = {Helmreich, Grant and Hunn, John D. and Brown, Daniel and Blamer, Brandon},
abstractNote = {X-ray computed tomography (XCT) is a powerful characterization tool that has been used for examination of both tristructural-isotropic (TRISO) coated particles and fuel forms. Rapid, nondestructive imaging of complete specimens by XCT provides significant characterization advantages in both speed and comprehensiveness over traditional materialographic methods. This paper discusses a method that has been developed to analyze XCT images of pebble fuel forms containing ~18,000 TRISO particles each. The XCT images are three-dimensional with contrast based on relative x-ray transparency. In the case of TRISO fuel forms, XCT image intensity distinguishes between the high-density kernel, the medium-density SiC, and the low-density matrix and carbon layers. Image analysis software has been developed to process XCT data sets to extract spatial distribution information, including particle nearest-neighbor distances, local packing fraction, and fuel-free zone thickness in TRISO fuel forms. Finally, although this type of high-resolution XCT analysis is likely not feasible as a quality control measurement for commercial TRISO fuel, it is highly useful in generating feedback for the development of fuel form fabrication processes.},
doi = {10.1016/j.nucengdes.2019.110418},
journal = {Nuclear Engineering and Design},
number = ,
volume = 357,
place = {United States},
year = {2019},
month = {11}
}

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