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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
October 2025
Latest News
DOE’s latest fusion energy road map aims to bridge known gaps
The Department of Energy introduced a Fusion Science & Technology (S&T) Roadmap on October 16 as a national “Build–Innovate–Grow” strategy to develop and commercialize fusion energy by the mid-2030s by aligning public investment and private innovation. Hailed by Darío Gil, the DOE’s new undersecretary for science, as bringing “unprecedented coordination across America's fusion enterprise” and advancing President Trump’s January 2025 executive order, on “Unleashing American Energy,” the road map echoes plans issued by the DOE’s Office of Fusion Energy Sciences (FES) in 2023 and 2024, with a new emphasis on the convergence of AI and fusion.
The road map release coincided with other fusion energy events held this week in Washington, D.C., and beyond.
H. Miyake, M. Matsuyama, K. Watanabe, D. F. Cowgill
Fusion Science and Technology | Volume 21 | Number 2 | March 1992 | Pages 812-817
Material; Storage and Processing | doi.org/10.13182/FST92-A29848
Articles are hosted by Taylor and Francis Online.
We developed a simple system using tritium tracer and thermal desorption techniques to measure the tritium adsorption and/or absorption on/in a material having typical surface conditions: namely, not cleaned surface. The tritium counting devices used were a 2π counter and conventional proportional counter. With this system, the amounts of ad/absorption could be measured without exposing the samples to air after exposing them to tritium gas. The overall efficiency (F) of the 2π counter was described as F = exp(−2.64h), where h is the distance from the sample to the detector. Ad/absorption measurements were carried out for several materials used for fabricating conventional vacuum systems. The results were, in the order of decreasing amounts of ad/absorption, as [fiber reinforced plastics(FRP)] > [nickel(Ni), molybdenum disulfide(MoS2)] > [stainless steel (SS304), iron(Fe), aluminum alloy(A2219)] > [boron nitride(h-BN), silicon carbide(SiC), SS304 passivated by anodic oxidation layers(ASS) and that by boron nitride segregation layers(BSS)]. The relative amounts were about 100 for Ni and 0.1 for ASS and BSS, being normalized to Fe = 1. It was found that the passivation of SS304 with anodic oxidation layers and/or BN segregation layers should be quite valid to decresase the tritium inventory on/in the material walls of tritium handling systems. In addition, it was estimated that this system would be capable of detecting the tritium adsorption of the order of 10−6 in the surface coverage.
