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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Latest News
NRC nominee Nieh commits to independent safety mission
During a Senate Environment and Public Works Committee hearing today, Ho Nieh, President Donald Trump’s nominee to serve as a commissioner at the Nuclear Regulatory Commission, was urged to maintain the agency’s independence regardless of political pressure from the Trump administration.
F. Bachelet, E. Bourgeois, R. Collier, E. Fleury, O. Legaie, B. Reneaume, M. Theobald
Fusion Science and Technology | Volume 60 | Number 3 | October 2011 | Pages 889-892
ICF | Proceedings of the Ninth International Conference on Tritium Science and Technology | doi.org/10.13182/FST11-A12560
Articles are hosted by Taylor and Francis Online.
As part of the French Inertial Confinement Fusion (ICF) program, CEA has developped Cryogenic Target Assemblies (CTAs) for the Laser MegaJoule (LMJ). These targets are filled by permeation with high pressure deuterium-tritium gas mixture. The evolution of the materials physical properties, particularly organic ones (PI and CHx), which compose the target is unknown in these hard conditions. The polyimide and CHx membranes permeation was studied in this context. The hydrogen and helium permeation parameters are unaltered for polyimide membrane after tritium ageing in the 20 K-300 K temperature range:KHe = 3.10-14 exp(-16040/RT) mol.m-1.s-1.Pa-1KH2 = 2.10-14 exp(-16950/RT) mol.m-1.s-1.Pa-1First results for the CHx hydrogen permeation parameters without ageing tritium have been obtained:KH2 = 7.10-13 exp(-10550/RT) mol.m-1.s-1.Pa-1New CHx permeation results after tritium ageing are shortly waited.
