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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.
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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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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.”
Gennadij T. Razdobarin, Gianfranco Federici, Vladimir M. Kozhevin, Eugeny E. Mukhin, Vladimir V. Semenov, Sergey Yu. Tolstyakov
Fusion Science and Technology | Volume 41 | Number 1 | January 2002 | Pages 32-43
Technical Paper | doi.org/10.13182/FST02-A198
Articles are hosted by Taylor and Francis Online.
A technique based on laser-induced breakdown spectroscopy is proposed for detecting in situ dust on the plasma-exposed surfaces and in the grooves of plasma-facing components in the next generation of fusion devices (e.g., ITER). It is based on laser-induced ablation of wall material and spectral analysis of the laser spark flash-light collected by imaging optics and transmitted to the detection system. This could give space- and time-resolved information on the presence of dust or loosely bound films, their characteristic deposition patterns, elemental composition, and possibly their hydrogen content, without the necessity of breaking the machine vacuum. We have performed some simple proof-of-principle experiments to demonstrate the suitability of this technique, which might provide an effective nonintrusive in situ surface analysis method for surveying in-vessel dust accumulation in future fusion devices. The preliminary results are discussed, and some of the inherent advantages and difficulties of this method are highlighted. The usefulness of this technique to provide reliable information on the quantity of dust at the probed location still depends on the resolution of several aspects, which are the subject of ongoing experimental investigation. Areas of further research and development are identified, and some of the design issues to integrate this system in a next-step fusion device such as ITER are briefly discussed.