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Conference Spotlight
2025 ANS Winter Conference & Expo
November 8–12, 2025
Washington, DC|Washington Hilton
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Fusion Science and Technology
Latest News
DNFSB’s Summers ends board tenure, extending agency’s loss of quorum
Lee
Summers
The Defense Nuclear Facilities Safety Board, the independent agency responsible for ensuring that Department of Energy facilities are protective of public health and safety, announced that the board’s acting chairman, Thomas Summers, has concluded his service with the agency, having completed his second term as a board member on October 18.
Summers’ departure leaves Patricia Lee, who joined the DNFSB after being confirmed by the Senate in July 2024, as the board’s only remaining member and acting chair. Lee’s DNFSB board term ends in October 2027.
Catalin Brill, Sebastian Brad, Claudia Bogdan, Aleksandr Grafov, Oleksandr Sirosh, Alin Lazar, Mihai Vijulie, Viorel Badescu
Fusion Science and Technology | Volume 80 | Number 3 | May 2024 | Pages 422-430
Research Article | doi.org/10.1080/15361055.2023.2283226
Articles are hosted by Taylor and Francis Online.
The Experimental Pilot Plant for Tritium and Duterium Separation has been designed and built at the Rm. Valcea National Research and Development Institute for Cryogenics and Isotopic Technologies to separate deuterium and tritium from deuterated and tritiated water based on two combined processes: catalytic isotope exchange and cryogenic distillation. For this, additional experimental stands were developed for testing different components of the columns, such as the cold box, heat exchangers, condensers, and boilers. This paper presents the design of a new generation of fin condensers that avoids film condensation and allows the dropwise condensation mode. A small-scale cryogenic system equipped with a hydrogen liquefaction unit is presented as an alternative for condenser conductivity testing. The condenser is fixed on a hydrogen tank that is protected by a radiation shield and mounted inside a vacuum chamber. The proposed method is to continuously liquefy hydrogen using a two-stage Gifford McMahon 4K cycle cryocooler. A method for estimating the liquefaction rate was proposed and confirmed by the test results.