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Division Spotlight
Nuclear Installations Safety
Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Fusion Science and Technology
Latest News
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
S. Rosanvallon, J.L. Courouau, G. Marbach, W. Gulden
Fusion Science and Technology | Volume 41 | Number 3 | May 2002 | Pages 695-699
Decontamination and Waste | Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001 | doi.org/10.13182/FST41-695
Articles are hosted by Taylor and Francis Online.
The waste management is a challenge for any future fusion facility including ITER. Detritiation could allow easier procedures since the practices in different countries already limit tritium contents and releases for disposal in nuclear waste storage. The experience developed in steel-making processes, for liquid steel degassing by gas injection, has been applied for modeling of tritium removal. A numerical model, initially developed at IRSID (USINOR's Process Research Center) for hydrogen removal, is adapted to determine detritiation efficiency. The hydrogen isotope transfer between liquid metal and injected gas occurs in two elementary steps, liquid phase mass transfer and interfacial reaction driven by Sievert's law for H2 and T2. In the gas phase, H2 and T2 react to give HT, according to the thermodynamic equilibrium and the isotopic exchange. The model takes into account the change in bubbles swarms (sizes and velocities) as they ascent from the bottom of the vessel to the metal free surface. It is thus possible to predict the tritium content evolution during the treatment as a function of process parameters. Duration and inlet gas mixture, which have the major influence on detritiation efficiency, must be set according to the tritium initial concentration and the activity expected in the final waste.