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Division Spotlight
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.
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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Nuclear Science and Engineering
August 2024
Nuclear Technology
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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.”
S. Benhamadouche, M.-C. Gauffre, P. Badel (EdF)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 765-776
EDF aims at identifying what causes fuel assembly vibrations in Pressurized Water Reactor (PWR). The present work focuses on the validation of pressure fluctuations along the central rod of a 5×5 configuration for wall-modelled Large Eddy Simulation (LES). New experiments, called CALIFS, have been carried out by CEA (Atomic Energy Commission) on a 5×5 Mixing Vane Grid (MVG) in the framework of “Fuel Assembly” EDF/CEA/FRAMATOME tripartite project. In addition to pressure drop and velocity measurements using Particle Image Velocimetry (PIV), pressure measurements have been performed along the central rod. The computational domain is representative of a span of the experimental mock-up, composed of a 5×5 rod bundle equipped with a split-type mixing vane grid. The hydraulic Reynolds number is equal to 66,000 and periodic boundary conditions are imposed in the stream-wise direction. The mesh is fully hexahedral and conformal. Computations give very satisfactory results for the pressure drop, the mean velocity and the Reynolds stresses at different locations. The r.m.s. of the pressure along the central rod is also compared to experimental data at different heights. The behavior is in very good agreement up to 5 hydraulic diameters downstream the mixing vane grid.