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Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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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 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.”
Masaaki Satake, Kazuhisa Yuki, Hidetoshi Hashizume
Fusion Science and Technology | Volume 52 | Number 4 | November 2007 | Pages 821-826
Technical Paper | Nuclear Analysis and Experiments | doi.org/10.13182/FST07-A1593
Articles are hosted by Taylor and Francis Online.
In a liquid blanket system, MHD effect or low heat-transfer property of high Prandtl number fluid makes it difficult to remove high heat load, therefore utilization of ducts with inserted rods or sphere-packed pipes has been proposed to enhance the heat transfer. It is important to reveal influence of arrangement of the rods or spheres upon the heat transfer characteristics. In this study, the influence of a distance between two rods in wall-normal and streamwise directions upon the flow structures is clarified by numerical simulation. When the rod is approaching to another rod in the wall-normal direction, Karman's vortex street is disrupted. On the other hand, the distance between the rod and the wall is shorter than a certain value, a separation occurs on the wall and then the separation position does not move when the distance is much smaller than that value. Moreover, the pressure drop depends on the distance between two rods, and then there exists the minimum pressure drop. When the distance between the two rods becomes shorter in the streamwise direction, the wake behind the upstream rod changes from Karman's vortex street to twin vortexes and the pressure drop decreases. The turbulent kinetic energy near the wall in case of Karman's vortex street, which is generated by the upstream rod, is higher than that in case of twin vortex.