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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Latest News
U.K.’s NWS gets input from young people on geological disposal
Nuclear Waste Services, the radioactive waste management subsidiary of the United Kingdom’s Nuclear Decommissioning Authority, has reported on its inaugural year of the National Youth Forum on Geological Disposal forum. NWS set up the initiative, in partnership with the environmental consultancy firm ARUP and the not-for-profit organization The Young Foundation, to give young people the chance to share their views on the government’s plans to develop a geological disposal facility (GDF) for the safe, secure, and long-term disposal of radioactive waste.
J. Nazon, E. Brun, F. Durut, M. Theobald, O. Legaie
Fusion Science and Technology | Volume 59 | Number 1 | January 2011 | Pages 139-147
Technical Paper | Nineteenth Target Fabrication Meeting | doi.org/10.13182/FST11-A11516
Articles are hosted by Taylor and Francis Online.
In order to decrease the wall absorption of hohlraums during the laser-matter interaction encountered in X-ray indirect-drive inertial confinement fusion, a thick layer of depleted uranium (DU) and gold alloy can be deposited on the inner surface of the hohlraums. Such a coating can be achieved by sputtering simultaneously DU and gold directly into the hohlraums. This technique is called "moulding PVD." In order to validate the moulding PVD technique, Au/Mo cocktail layers were deposited on glass substrates by simultaneous multitarget sputtering. Molybdenum is used for deposition of cocktail alloys since it shows the same sputtering yields as uranium. Au/Mo cocktail layers can be easily grown on glass substrates at any desired composition and controlled thickness by optimizing the deposition parameters. A major issue of DU deposition is its rapid delamination in contact with water, air, or hydrogen. To protect the DU/Au alloy, a thin coating of dense gold is sputtered on the DU alloy. Dense and low-stress gold thin films deposited on glass substrates have been achieved by optimization of processing parameters. The effect of such a coating has been quantified thanks to the study of praseodymium oxidation (which is more sensitive to delamination than DU). A gold coating thickness of 0.2 m thoroughly decreases the oxidation rate of praseodymium in contact with air.