2021
DOI: 10.1557/s43580-021-00167-1
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Seeing through nuclear fuel: Three-dimensional, nondestructive X-ray microscopy and volumetric analyses of neutron-irradiated TRISO-coated fuel kernels

Abstract: The three-dimensional (3D) characterization of nuclear fuel with X-ray microscopy has historically proven difficult, due to uranium's high attenuation of easily accessible X-rays, both in a laboratory setting and at a synchrotron user facility. However, this imaging modality provides nondestructive information that can be used to investigate morphological changes arising from external stimuli (e.g., neutron irradiation, high-temperature testing). Using an appropriate X-ray energy spectrum and an adequate X-ray… Show more

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Cited by 8 publications
(3 citation statements)
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“…• X-ray tomographic studies of the structure of tri-structural isotropic (TRISO) fuel particles, performed at a "spatial resolution of about 1.2 µm with good sensitivity to defects in the carbon buffer layer" [27] • 3-D x-ray microscope characterization of the morphological evolution of TRISO-coated fuel kernels after high-temperature neutron irradiation [28] • Trace element (impurity) characterization of nuclear materials, utilizing total reflection XRF. [29] The fundamental scientific information available thanks to x-ray synchrotron light source capabilities is often accessible when using other complementary and synergistic characterization techniques (e.g., electron microscopy, positron annihilation spectroscopy, and atom probe tomography).…”
Section: Alternative Spatially Resolved Materials Characterization Me...mentioning
confidence: 99%
“…• X-ray tomographic studies of the structure of tri-structural isotropic (TRISO) fuel particles, performed at a "spatial resolution of about 1.2 µm with good sensitivity to defects in the carbon buffer layer" [27] • 3-D x-ray microscope characterization of the morphological evolution of TRISO-coated fuel kernels after high-temperature neutron irradiation [28] • Trace element (impurity) characterization of nuclear materials, utilizing total reflection XRF. [29] The fundamental scientific information available thanks to x-ray synchrotron light source capabilities is often accessible when using other complementary and synergistic characterization techniques (e.g., electron microscopy, positron annihilation spectroscopy, and atom probe tomography).…”
Section: Alternative Spatially Resolved Materials Characterization Me...mentioning
confidence: 99%
“…In an interest to research and develop nondestructive characterization techniques for TRISO coated particle fuel-bearing compacts and individual TRISO coated fuel particles, the use of micro X-ray computed tomography (micro-XCT) has been investigated with these fuel systems [2]. Micro-XCT is an imaging modality that provides nondestructive three-dimensional (3D) surface and subsurface morphological information by acquiring several thousand X-radiographs as a function of sample rotation.…”
mentioning
confidence: 99%
“…The radiographs are then used to create a mathematical 3D reconstruction (i.e., tomogram) of the sample. However, the micro-XCT imaging of uranium-bearing materials is challenging due to uranium's high mass attenuation coefficient at X-ray energies that are typically accessible with laboratory-based X-ray sources [2,3]. Additional challenges include the sample preparation and handling of highly irradiated nuclear fuel (e.g., radioactive contamination and high energy radiation).…”
mentioning
confidence: 99%