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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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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.”
Veera R. Gutti, Sudarshan K. Loyalka
Nuclear Technology | Volume 166 | Number 2 | May 2009 | Pages 121-133
Technical Papers | Thermal Hydraulics | doi.org/10.13182/NT09-A7399
Articles are hosted by Taylor and Francis Online.
Thermophoresis causes particle deposition on nuclear reactor components from gas/vapor streams, both during normal and accident conditions, and it is of interest to develop good computational tools for estimation of such deposition. This paper describes a numerical technique to solve the coupled equations of energy and particle continuity. The numerical technique was verified by comparing the solution of the Graetz energy transport problem obtained by using the present numerical technique with the series solution. Thermophoretic deposition efficiency obtained from the present numerical technique agrees with the analytical solution for short tubes. Deposition efficiencies for the case RePr = 1 and Pr K = 1 are in good agreement with the published theoretical expressions for thermophoretic deposition efficiency. Also, the results from the numerical solution for thermophoretic deposition efficiency compare well with some experimental data published in the literature. Dependence of deposition efficiency on thermophoretic coefficient K was studied, and it was observed that the dependence is more linear for smaller thermal gradients than for the larger gradients. Further, the computational fluid dynamics program FLUENT® 6.3 was also used to explore calculations of the thermophoretic deposition efficiencies for some cases, and it was noted that results are sensitive to mesh size and that very fine mesh near the surface was needed for accurate results. The results computed are in good agreement with our numerical calculations and experimental data.