ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
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.”
S. Usman, B. S. Mohammad, S. Abdallah
Nuclear Technology | Volume 159 | Number 3 | September 2007 | Pages 310-318
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT07-A3878
Articles are hosted by Taylor and Francis Online.
Transient response of a natural convection system is investigated by numerical simulation using FLUENT code. An integrator circuit analogy was recently proposed for natural convection systems. The proposed analogy was further confirmed by these recent simulations. New simulation results also suggest that a natural convection system acts as a "low-pass" filter for transients. Transmission characteristics of a natural convection system were investigated using sinusoidal temperature at the source-side boundary. Transient transmission factor was found to be a function of both fluid properties and the flow characteristics. Transmission factor was also found to be a strong function of fluctuation frequency. These results may prove a significant design tool for Generation IV natural convection systems, particularly for lead-cooled fast reactors or molten salt reactors.