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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.
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Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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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
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Christmas Night
Twas the night before Christmas when all through the houseNo electrons were flowing through even my mouse.
All devices were plugged in by the chimney with careWith the hope that St. Nikola Tesla would share.
P. Buratti, A. Airoldi, F. Alladio, S. V. Annibaldi, A. Bruschi, S. Cirant, R. M. Coelho, F. Gandini, E. Giovannozzi, E. Lazzaro, P. Micozzi, S. Nowak, F. Porcelli, G. Ramponi, P. Smeulders, O. Tudisco
Fusion Science and Technology | Volume 45 | Number 3 | May 2004 | Pages 350-369
Technical Paper | Frascati Tokamak Upgrade (FTU) | doi.org/10.13182/FST04-A519
Articles are hosted by Taylor and Francis Online.
The main magnetohydrodynamic (MHD) activities affecting the Frascati Tokamak Upgrade (FTU) high-field plasmas with limiter configuration are sawtooth relaxations and tearing modes.The period of sawtooth relaxations can be increased in FTU both by electron heating and by pellet particle deposition near the sawtooth inversion radius; both methods lead to full stabilization in proper conditions. The sawtooth period can be shortened as well by central heating.The influence of localized electron cyclotron resonance heating (ECRH) on the stability of m = 2 tearing modes has been studied in FTU by means of radial and power scans. Heating between the plasma center and the island location increases the island size, while heating at the island location produces mode stabilization if ECRH power exceeds a threshold value. These sawtooth and tearing mode studies show that some control of both phenomena can be achieved.Double-tearing modes in the form of regular, sawtooth-like relaxations have been observed in discharges with reversed magnetic shear. The development of these instabilities is particularly interesting in FTU as it happens in the absence of injected momentum.Long-lived m = 1 island structures are frequently observed following pellet deposition near the inversion radius; particle accumulation around the O-point enhances diagnostic sensitivity, thus allowing fine studies of island dynamics.MHD spectroscopy has revealed the existence of coherent waves at frequencies well above the drift-tearing range in thermal plasmas. In addition, broadband turbulence has been observed both in ohmic and in radio-frequency-heated plasmas. The amplitude of turbulent fluctuations increases with heating power and is anticorrelated with the neutron yield.