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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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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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.”
J.M. Miller, R.A. Verrall, D.S. MacDonald, S.R. Bokwa
Fusion Science and Technology | Volume 14 | Number 2 | September 1988 | Pages 649-656
Tritium Properties and Interactions with Material | Proceedings of the Third Topical Meeting on Tritium Technology in Fission, Fusion and Isotopic Applications (Toronto, Ontario, Canada, May 1-6, 1988) | doi.org/10.13182/FST88-A25208
Articles are hosted by Taylor and Francis Online.
Results from the CRITIC-I, vented capsule irradiation of Li2O are presented. A total lithium burnup of 0.74% has been achieved and 1500 curiesb of tritium have been collected over the first 15 months of irradiation. The temperature has been varied between 400 and 850°C, and the sweep gas composition changed progressively from pure He to He-1% H2. The amount of tritium recovered in the reduced form (HT) has increased from an initial value of approximately 50% with pure He sweep gas to a current value of 99% with He-1% H2. The increasing H2 concentration in the sweep gas has also reduced the time constants for tritium release (tritium residence time in the Li2O). Although the results indicate tritium release is controlled by surface desorption, simple first-order desorption theories do not explain all the observations. Most noticeably, for temperature increase tests, tritium release peak maxima can be delayed as long as 6 h and inventory changes depend not only on the initial temperature but also on the time at the initial temperature. An explanation is given based on the buildup of free oxygen in the ceramic from lithium burnup which leads to tritium trapping, perhaps as LiOH(T). Dissociation of LiOH(T) then occurs following an increase in the ceramic temperature, in addition to the simple first-order desorption process of isotopic exchange with H2 in the sweep gas.