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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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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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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General Kenneth Nichols and the Manhattan Project
Nichols
The Oak Ridger has published the latest in a series of articles about General Kenneth D. Nichols, the Manhattan Project, and the 1954 Atomic Energy Act. The series has been produced by Nichols’ grandniece Barbara Rogers Scollin and Oak Ridge (Tenn.) city historian David Ray Smith. Gen. Nichols (1907–2000) was the district engineer for the Manhattan Engineer District during the Manhattan Project.
As Smith and Scollin explain, Nichols “had supervision of the research and development connected with, and the design, construction, and operation of, all plants required to produce plutonium-239 and uranium-235, including the construction of the towns of Oak Ridge, Tennessee, and Richland, Washington. The responsibility of his position was massive as he oversaw a workforce of both military and civilian personnel of approximately 125,000; his Oak Ridge office became the center of the wartime atomic energy’s activities.”
S. M. Ghiaasiaan, J. D. Bohner, S. I. Abdel-Khalik
Nuclear Science and Engineering | Volume 123 | Number 1 | May 1996 | Pages 136-146
Technical Paper | doi.org/10.13182/NSE96-A24218
Articles are hosted by Taylor and Francis Online.
Countercurrent flow limitation in channels with evaporation taking place inside them is examined. Countercurrent flow limitation in short, small-diameter channels subject to purely axial, purely radial, and combined axial and radial gas injection is studied. Experiments were performed using air and water, with channel diameters 0.475 to 1.91 cm and channel lengths 1.27 to 5.72 cm. Purely axial gas injection data are shown to agree with Wallis’s correlation but with coefficients that strongly depend on channel dimensions. Purely radial gas injection data and data obtained with combined axial and radial gas injection result in flooding curves significantly different from those representing the purely axial gas injection data and indicate that near complete flooding (zero liquid penetration) can occur in small-diameter and short channels due to relatively small radial gas injection rates. Flooding curves for long or large-diameter channels are insensitive to the gas injection configuration, however.