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Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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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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Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Shao-Rong Wu, Klaus Rehme
Nuclear Technology | Volume 89 | Number 1 | January 1990 | Pages 103-115
Technical Paper | Heat Transfer and Fluid Flow | doi.org/10.13182/NT90-A34362
Articles are hosted by Taylor and Francis Online.
Measurements of the mean velocity, wall shear stresses, and turbulent Reynolds stresses were performed in wall subchannels of two rod bundles. The rod bundle of four parallel rods was arranged symmetrically in a rectangular channel. The pitch-to-diameter ratio was 1.148, and the wall-to-diameter ratios were 1.045 and 1.074, respectively. The Reynolds numbers in these investigations were 6.11 × 104 and 7.07 × 104, respectively. The experimental results demonstrate once more that the structure of turbulence in rod bundles differs greatly from the structure in circular tubes. Especially in the narrow gaps between the rods and channel walls, there are increased levels of turbulence intensities in both the axial and azimuthal directions and, hence, of the kinetic energy of turbulence, caused by a strong turbulent momentum transport through the gaps. In comparison with the previous investigations in these geometries, however, arranged asymmetrically in the rectangular channels, the momentum transport between the subchannels across the gap between the rods is negligible. The comparison between the experimental wall shear stress distributions and those computed by the VELASCO code shows strong deviations, especially in the gap regions between the rods and channel walls. More sophisticated analytical tools than presently available are required to predict turbulent flow through rod bundles with sufficient accuracy.