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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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DOE issues new NEPA rule and procedures—and accelerates DOME reactor testing
Meeting a deadline set in President Trump’s May 23 executive order “Reforming Nuclear Reactor Testing at the Department of Energy,” the DOE on June 30 updated information on its National Environmental Policy Act (NEPA) rulemaking and implementation procedures and published on its website an interim final rule that rescinds existing regulations alongside new implementing procedures.
A. N. Golubkov, A. A. Kononenko, A. A. Yukhimchuk
Fusion Science and Technology | Volume 48 | Number 1 | July-August 2005 | Pages 527-533
Technical Paper | Tritium Science and Technology - Materials Interaction and Permeation | doi.org/10.13182/FST05-A981
Articles are hosted by Taylor and Francis Online.
Hydrogen isotopes sources with pressure up to several thousand atmospheres are required to pursue some investigations in nuclear and thermonuclear processes. Investigations are performed in mixtures of all three hydrogen isotopes. Stringent requirements are placed on such sources. Primarily, this is reliability and safety, purity of supplied gas, possibility of smooth pressure control, minimal dimensions and the ease to operate. Vanadium-base thermodesorption sources meet these requirements. Literature data on equilibrium pressures of hydrogen isotopes desorption over vanadium dihydride phase have been reviewed. It has been shown that in data analysis, gas nonideality at high pressure should be taken into account. In particular, when showing temperature dependencies of desorption equilibrium pressures it is reasonable to use appropriate value of fugacity. The paper presents temperature dependencies of protium and deuterium fugacity over corresponding dihydride vanadium phases in the range of 300-635K, determined using experimental data of the authors. Temperature dependence of tritium fugacity over dihydride vanadium phase at 273-483K determined using experimental data of the authors and available literature data are also presented. A series of vanadium-base thermodesorption high-pressure hydrogen isotopes sources have been developed in RFNC-VNIIEF using of the obtained dependencies. Schemes of sources for research in fundamental science are presented.