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Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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.”
A.R.A. Haasz1, K.T. Aust1, W.T. Shmayda2, G. Palumbo2
Fusion Science and Technology | Volume 28 | Number 3 | October 1995 | Pages 1169-1174
Tritium Properties and Interaction with Material | Proceedings of the Fifth Topical Meeting on Tritium Technology In Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 | doi.org/10.13182/FST95-A30566
Articles are hosted by Taylor and Francis Online.
Hydrogen transport studies were confined to molecular hydrogen driven permeation through two largely different polycrystalline grain structures: (i) microcrystalline nickel with an average grain size of 3µim and (ii) nanocrystalline nickel with an average grain size of 78 nm. Permeation experiments were conducted in a double chamber ultrahigh vacuum system separated by a test specimen. Hydrogen permeabilities and diffusivities through polycrystalline nickel were measured in the temperature range of 30°C to 200°C. At 30°C the nanocrystalline nickel displayed a six-fold increase in permeability with respect to the microcrystalline nickel. The enhancement in permeability is believed to be the result of enhanced intercrystalline volume fraction in the nanocrystalline nickel.