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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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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 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.”
T. D. Akhmetov, V. I. Davydenko
Fusion Science and Technology | Volume 35 | Number 1 | January 1999 | Pages 121-125
Oral Presentations | doi.org/10.13182/FST99-A11963835
Articles are hosted by Taylor and Francis Online.
We discuss MHD stability of the plasma in the completely axisymmetric end system of AMBAL-M and suggest a physical model to interpret the experimental results. Measurement of the radial plasma pressure profile in the semicusp using a local magnetic probe allowed estimation of the stability safety factor of the end system plasma which occurred to be greater than 3÷4. Gas puffing into the semicusp increases the plasma pressure in this region and hence enhances stability. To explain the observed MHD stability of the end mirror plasma when the MHD stabilizer — semicusp was switched off and the average field line curvature was unfavorable, a model was proposed which assumes that the plasma at the periphery had an electric contact with a limiter. As a result, the potential of flute perturbations vanishes at the plasma periphery. In this case finite Larmor radius effects may stabilize the most dangerous first (global) azimuthal mode because of nonlinear dependence of plasma perturbations on radius.