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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.
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 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. 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.”
B. Lu, S. I. Abdel-Khalik, D. L. Sadowski, K. G. Schoonover, F. Hegeler, P. M. Burns, J. D. Sethian
Fusion Science and Technology | Volume 56 | Number 1 | July 2009 | Pages 441-445
IFE Drivers and Chambers | Eighteenth Topical Meeting on the Technology of Fusion Energy (Part 1) | doi.org/10.13182/FST09-A8941
Articles are hosted by Taylor and Francis Online.
Active cooling of the transmission foil separating the vacuum diodes from the laser cell in the Electra KrF Laser is necessary to prevent its failure under repetitively pulsed (5Hz) operating conditions. This paper investigates the effectiveness of forced convection cooling using near-wall jets as a means of protecting the foil. Two different near-wall jet configurations are examined. The first one uses a planar, 1mm-thick, high-speed jet flowing parallel to the laser gas stream along the entire width of the hibachi foil structure. The second one uses small, 0.8mm-diameter circular jets positioned in staggered locations, 12.7mm apart, along the ~30cm height of each of the 24 hibachi rib spans with flow perpendicular to the laser gas stream. Bench-top experiments simulating a single 3.4cm×30cm foil span between two neighboring ribs have been conducted. For both jet configurations, experiments have been performed at different jet velocities and heat inputs. The goal of these experiments is to demonstrate quantitatively that near-wall jets can effectively cool the Electra hibachi foil under prototypical pulsed operating conditions without adverse impact on beam quality or laser efficiency. Preliminary tests with a full-size hibachi on Electra have shown this to be true.