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Title: Local atomic structure of Pd and Ag in the SiC containment layer of TRISO fuel particles fissioned to 20% burn-up

Authors:
; ; ; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
DOE - NUCLEAR ENERGY
OSTI Identifier:
1419065
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Materials; Journal Volume: 500; Journal Issue: C
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Seibert, Rachel L., Terrani, Kurt A., Velázquez, Daniel, Hunn, John D., Baldwin, Charles A., Montgomery, Fred C., and Terry, Jeff. Local atomic structure of Pd and Ag in the SiC containment layer of TRISO fuel particles fissioned to 20% burn-up. United States: N. p., 2018. Web. doi:10.1016/j.jnucmat.2017.12.032.
Seibert, Rachel L., Terrani, Kurt A., Velázquez, Daniel, Hunn, John D., Baldwin, Charles A., Montgomery, Fred C., & Terry, Jeff. Local atomic structure of Pd and Ag in the SiC containment layer of TRISO fuel particles fissioned to 20% burn-up. United States. doi:10.1016/j.jnucmat.2017.12.032.
Seibert, Rachel L., Terrani, Kurt A., Velázquez, Daniel, Hunn, John D., Baldwin, Charles A., Montgomery, Fred C., and Terry, Jeff. 2018. "Local atomic structure of Pd and Ag in the SiC containment layer of TRISO fuel particles fissioned to 20% burn-up". United States. doi:10.1016/j.jnucmat.2017.12.032.
@article{osti_1419065,
title = {Local atomic structure of Pd and Ag in the SiC containment layer of TRISO fuel particles fissioned to 20% burn-up},
author = {Seibert, Rachel L. and Terrani, Kurt A. and Velázquez, Daniel and Hunn, John D. and Baldwin, Charles A. and Montgomery, Fred C. and Terry, Jeff},
abstractNote = {},
doi = {10.1016/j.jnucmat.2017.12.032},
journal = {Journal of Nuclear Materials},
number = C,
volume = 500,
place = {United States},
year = 2018,
month = 3
}
  • Fracture stress data for the chemical vapor deposition (CVD) SiC coatings of tri-isotropic (TRISO) carbon/silicon carbide coated fuel particles were obtained using a newly developed testing and evaluation method, and their relationship with microstructure investigated. A crush testing technique using a blanket foil at load-transferring contact has been developed for hemispherical shell SiC specimens based on finite element (FE) analysis results. Mean fracture stress varied with test material in the range of 330 650 MPa, and was connected to the combined characteristics of inner surface roughness and porosity.
  • Tristructural isotropic (TRISO) particles are considered as advanced fuel forms for a variety of fission platforms. While these fuel structures have been tested and deployed in reactors, the mechanical properties of these structures as a function of production parameters need to be investigated in order to ensure their reliability during service. Nanoindentation techniques, indentation crack testing, and half sphere crush testing were utilized in order to evaluate the integrity of the SiC coating layer that is meant to prevent fission product release in the coated particle fuel form. The results are complimented by scanning electron microscopy (SEM) of the grainmore » structure that is subject to change as a function of processing parameters and can alter the mechanical properties such as hardness, elastic modulus, fracture toughness and fracture strength. Through utilization of these advanced techniques, subtle differences in mechanical properties that can be important for in-pile fuel performance can be distinguished and optimized in iteration with processing science of coated fuel particle production.« less
  • Tristructural isotropic (TRISO) particles are considered as advanced fuel forms for a variety of fission platforms. While these fuel structures have been tested and deployed in reactors, the mechanical properties of these structures as a function of production parameters need to be investigated in order to ensure their reliability during service. Nanoindentation techniques, indentation crack testing, and half sphere crush testing were utilized in order to evaluate the integrity of the SiC coating layer that is meant to prevent fission product release in the coated particle fuel form. The results are complimented by scanning electron microscopy (SEM) of the grainmore » structure that is subject to change as a function of processing parameters and can alter the mechanical properties such as hardness, elastic modulus, fracture toughness and fracture strength. Through utilization of these advanced techniques, subtle differences in mechanical properties that can be important for in-pile fuel performance can be distinguished and optimized in iteration with processing science of coated fuel particle production.« less