Abstract
Methods for postirradiation characterization of bulk (cm3) irradiated materials or even spent nuclear fuels are sparse due to their extremely radioactive nature. While several methods exist to characterize smaller volumes (< 1 mm3) of such samples, selecting these volumes from larger samples is challenging. X-ray-based methods are prohibitive due to the strong γ-radiation from the sample flooding the detectors. Neutron-based methods available in the proximity of irradiation reactors allow for thermal neutron radiography or computed tomography using a small reactor source, but one cannot assess isotope distributions or microstructural features such as phases, texture, or strain from diffraction measurements due to flux limitations. We present herein a pathway to provide pulsed neutron characterization of bulk irradiated samples using time-of-flight neutron diffraction for microstructural characterization and energy-resolved neutron imaging for assessment of isotopic densities and distributions. Ultimately, laser-driven pulsed neutron sources may allow deployment of these techniques pool-side at irradiation reactors.
Original language | English |
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Pages (from-to) | 187-196 |
Number of pages | 10 |
Journal | JOM |
Volume | 72 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2020 |
Funding
This work was supported by the DOE/NE Fuel Cycle R&D research program. This work has benefitted from the use of the Los Alamos Neutron Science Center (LANSCE) at Los Alamos National Laboratory. Los Alamos National Laboratory is operated by Triad National Security, LLC, for the National Nuclear Security Administration of the S Department of Energy under Contract No. 89233218NCA000001. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. This work was supported by the DOE/NE Fuel Cycle R&D research program. This work has benefitted from the use of the Los Alamos Neutron Science Center (LANSCE) at Los Alamos National Laboratory. Los Alamos National Laboratory is operated by Triad National Security, LLC, for the National Nuclear Security Administration of the S Department of Energy under Contract No. 89233218NCA000001.
Funders | Funder number |
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National Nuclear Security Administration of the S Department of Energy | |
National Nuclear Security Administration | 89233218NCA000001 |
Los Alamos National Laboratory |