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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.
Jèrèmy Mascarade, Karine Liger, Xavier Joulia, Michéle Troulay, Xuan-Mi Meyer, Christophe Perrais
Fusion Science and Technology | Volume 67 | Number 2 | March 2015 | Pages 463-466
Proceedings of TRITIUM 2013 | doi.org/10.13182/FST14-T55
Articles are hosted by Taylor and Francis Online.
This paper presents the results of a parametric study done on a single stage finger-type packed-bed membrane reactor (PBMR) used for heavy water vapor dedeuteration. Thanks to mass spectrometer analysis of streams leaving the PBMR, speciation of deuterated species was achieved. Measurement of the amounts of each molecular component allowed the calculation of reaction quotient at the packed-bed outlet (i.e. retentate). They highlighted that isotopic exchange reactions occurring on the catalyst particles surface are not thermodynamically equilibrated. Moreover, variation of the heavy water content in the feed exhibits competition between permeation and conversion kinetics.