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November 9–12, 2025
Washington, DC|Washington Hilton
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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.
I. A. Maslov, V. A. Lucknitsky, N. M. Karnaukhova, G. I. Karaganova
Nuclear Technology | Volume 7 | Number 4 | October 1969 | Pages 389-392
Analysis | doi.org/10.13182/NT69-A28483
Articles are hosted by Taylor and Francis Online.
To measure the evaporation rate of solids in vacuum, the evaporating substance was condensed on a water-cooled lead plate. The plate with the condensate was removed, irradiated by neutrons, and etched in a mixture of nitric and hydrofluoric acids, and the radioactive isotopes in the solution were identified. The possibilities of the method are illustrated by the measurement of the molybdenum metal and zirconium carbide evaporation rates. The amount of molybdenum (99Mo) was determined by direct γ-spectrometry of the solution. In the case of zirconium, radiochemical isolation of 95Zr from the mixture of antimony, zinc, tantalum, and hafnium present in the solution in amounts commensurable with that of zirconium was suggested. The vaporization experiment was carried out in a vacuum ∼10-5 to 10-6 Torr. The measured values of the molybdenum and zirconium carbide evaporation rates in the temperature range ∼1900 to 2400°C are given.