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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.”
Xuejiao Xiao, Chang Nyung Kim
Fusion Science and Technology | Volume 66 | Number 3 | November 2014 | Pages 414-425
Technical Paper | doi.org/10.13182/FST14-806
Articles are hosted by Taylor and Francis Online.
In this study, three-dimensional liquid-metal magnetohydrodynamic flows in a rectangular hairpin duct with parallel inflow and outflow channels, placed under uniform magnetic fields, are analyzed based on a computational fluid dynamics method. Detailed information on flow velocity, pressure, current, and electric potential in magnetohydrodynamic duct flows is predicted. In the side layers of the inflow and outflow channels, higher velocities are observed, and M-shaped velocity profiles are presented. In the turning segment, the velocity distribution is very complex, yielding complicated induced current therein. The electromagnetic characteristics of the complicated liquid-metal flows are examined in terms of the electromotive and electric-field components of the current. The pressure almost linearly decreases along the main flow direction, except for in the turning segment. Cases with different Hartmann numbers are examined, and the larger the Hartmann number is, the larger the pressure drop is. However, the nondimensional pressure gradient is smaller in cases of larger Hartmann numbers.