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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Fusion Science and Technology
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.
T. Otsuka, T. Tanabe, M. Shinohara
Fusion Science and Technology | Volume 80 | Number 1 | January 2024 | Pages 38-47
Research Article | doi.org/10.1080/15361055.2023.2187251
Articles are hosted by Taylor and Francis Online.
Effects of a gap/open space between double membranes of Ni/Ni and Pd/Ni on hydrogen permeation through the double membranes are studied. For easy detection of permeated H, T is introduced. For Ni/Ni and Pd/Ni, the influence of the gap on hydrogen permeation is not appreciable, while the permeation for Ni/Pd is significantly reduced because the gap holds H2O produced by the reaction of permeated hydrogen and the surface oxide of Ni facing toward the gap; consequently, the partial pressure of H2O in the gap becomes high and subsequent reduction of the surface oxide is prohibited. From these findings, a new double-walled tube concept for the reduction of T permeation is proposed with a combination of a rather thin front tube with its back side oxidized as a permeation barrier and a thick tube as a structure material.