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Division Spotlight
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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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August 2024
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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.”
Daniel Nunez, Benedikt Krohn, Victor Petrov, Annalisa Manera (Univ of Michigan)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 904-918
Over recent decades, Particle Image Velocimetry (PIV) has become an increasingly common optical technique used to study fluid flows. As a result, large quantities of PIV data are becoming readily available for the development and validation of Computational Fluid Dynamics (CFD) codes. The CFD community heavily relies on experimental data, and the experimental community should focus on an important quality that is often overlooked – the repeatability and the reproducibility of PIV data. Unfortunately, with advanced instrumentation such as a PIV system, slight variations in equipment setup can be sources of discrepancies in the measurements. In the present work, we discuss the level of repeatability and reproducibility of PIV results obtained in the Reactor Cavity Cooling System (RCCS) separate-effects test facility – a facility that aims to provide a high-resolution experimental database to be used to further develop the predictive capabilities of system and CFD codes. We examine the repeatability and reproducibility of the mean velocity and Reynolds stresses for the experiment of six rectangular jets with jet Reynolds numbers of 1.38×104. Furthermore, we discuss the convergence of the mean velocity and Reynolds stresses and some discrepancies observed between separate measurements. By conducting a few PIV measurements to verify the repeatability and reproducibility of the data, we gained insight into how much variation is present between separate measurements – an important quantity that should be included when providing uncertainty bands for PIV data.