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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.
Sebastian Mirz, Uwe Besserer, Beate Bornschein, Robin Größle, Bennet Krasch, Stefan Welte
Fusion Science and Technology | Volume 71 | Number 3 | April 2017 | Pages 375-380
Technical Paper | doi.org/10.1080/15361055.2016.1273706
Articles are hosted by Taylor and Francis Online.
An integral part of the fuel cycle of future fusion facilities is the isotope separation system (ISS). The Tritium Laboratory Karlsruhe (TLK) is currently developing a system to monitor the concentration of all six hydrogen isotopologues Q2 (H2, HD, D2, HT, DT, T2) in the liquid phase in the cryogenic distillation process of the ISS.
Liquid inactive Q2 were already successfully analyzed under cryogenic conditions via infrared (IR) absorption spectroscopy and calibration data for D2 is provided by previous experiments at TLK. The new experiment T2ApIR (Tritium Absorption Infrared Spectroscopy Experiment) is designed to be fully tritium compatible to perform a complete calibration of the IR absorption measurement system with all six hydrogen isotopologues in the liquid phase under conditions similar to the ISS. This provides a unique non-invasive, inline and real-time measurement system for isotopologic concentration determination, ready for implementation in the cryogenic distillation column.
