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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Latest News
NNSA awards BWXT $1.5B defense fuels contract
The Department of Energy’s National Nuclear Security Administration has awarded BWX Technologies a contract valued at $1.5 billion to build a Domestic Uranium Enrichment Centrifuge Experiment (DUECE) pilot plant in Tennessee in support of the administration’s efforts to build out a domestic supply of unobligated enriched uranium for defense-related nuclear fuel.
Jordan A. Evans, Scott A. Anderson, Eric J. Faierson, Delia Perez-Nunez, Sean M. McDeavitt
Nuclear Technology | Volume 205 | Number 4 | April 2019 | Pages 563-581
Technical Paper | doi.org/10.1080/00295450.2018.1502001
Articles are hosted by Taylor and Francis Online.
In this experiment, Type 316L stainless steel rods were fabricated through laser additive manufacturing (LAM) in three different orientations, and microstructural and mechanical changes induced by high dose ion irradiation were characterized based on orientation. The rods were irradiated with Fe2+ self-ions to a peak dose of 80 displacements per atom at 475°C. Results were compared to concurrently irradiated conventionally manufactured control specimens. Electron backscatter diffraction of the rods yielded statistically relevant information related to grain microstructure and texture. Transmission electron microscopy revealed a high density of elongated radiation-produced defects in the LAM specimens that were aligned with the major axes of the defects parallel to the build direction. Mechanical testing of LAM rods revealed anisotropic radiation-induced hardening, where hardening is greatest perpendicular to the build direction and least parallel to the build direction. Several radiation-induced hardening phenomena are considered that contribute to the observed anisotropic strengthening.