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Title: Measurement of kernel swelling and buffer densification in irradiated UCO-TRISO particles

Radiation-induced volume changes in the fuel kernels and buffer layers of UCO-TRISO particles irradiated to an average burnup of 16.1% FIMA have been determined. Measurements of particle dimensions were made on polished cross-sections of 56 irradiated particles at several different polish planes. The data were then analyzed to compute the equivalent spherical diameters of the kernels and the various coating layers, and these were compared to the average as-fabricated values to determine changes due to irradiation. In conclusion, the kernel volume was found to have increased by an average of 26±6%. Buffer volume decreased by an average of 39±2% due to densification.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [2]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Report Number(s):
INL/JOU-16-40345-Rev000
Journal ID: ISSN 0022-3115
Grant/Contract Number:
AC07-05ID14517; AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 486; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Research Org:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE)
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; Advanced Gas Reactor (AGR); TRISO; fuel; kernels; ilicon carbide; Post-irradiation examination
OSTI Identifier:
1470331
Alternate Identifier(s):
OSTI ID: 1396870

Bower, Gordon R., Ploger, Scott A., Demkowicz, Paul A., and Hunn, John D.. Measurement of kernel swelling and buffer densification in irradiated UCO-TRISO particles. United States: N. p., Web. doi:10.1016/j.jnucmat.2017.01.006.
Bower, Gordon R., Ploger, Scott A., Demkowicz, Paul A., & Hunn, John D.. Measurement of kernel swelling and buffer densification in irradiated UCO-TRISO particles. United States. doi:10.1016/j.jnucmat.2017.01.006.
Bower, Gordon R., Ploger, Scott A., Demkowicz, Paul A., and Hunn, John D.. 2017. "Measurement of kernel swelling and buffer densification in irradiated UCO-TRISO particles". United States. doi:10.1016/j.jnucmat.2017.01.006. https://www.osti.gov/servlets/purl/1470331.
@article{osti_1470331,
title = {Measurement of kernel swelling and buffer densification in irradiated UCO-TRISO particles},
author = {Bower, Gordon R. and Ploger, Scott A. and Demkowicz, Paul A. and Hunn, John D.},
abstractNote = {Radiation-induced volume changes in the fuel kernels and buffer layers of UCO-TRISO particles irradiated to an average burnup of 16.1% FIMA have been determined. Measurements of particle dimensions were made on polished cross-sections of 56 irradiated particles at several different polish planes. The data were then analyzed to compute the equivalent spherical diameters of the kernels and the various coating layers, and these were compared to the average as-fabricated values to determine changes due to irradiation. In conclusion, the kernel volume was found to have increased by an average of 26±6%. Buffer volume decreased by an average of 39±2% due to densification.},
doi = {10.1016/j.jnucmat.2017.01.006},
journal = {Journal of Nuclear Materials},
number = C,
volume = 486,
place = {United States},
year = {2017},
month = {1}
}