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The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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ANS Student Conference 2025
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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.”
Wang-Kee In, Tae-Hyun Chun
Nuclear Technology | Volume 150 | Number 3 | June 2005 | Pages 231-250
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT05-A3619
Articles are hosted by Taylor and Francis Online.
A computational fluid dynamics (CFD) analysis has been performed to assess the Reynolds Average Navier-Stokes (RANS) turbulence models to predict a turbulent flow and heat transfer in a triangular rod bundle with pitch-to-diameter ratios (P/Ds) of 1.06 and 1.12. The CFD predictions using various turbulence models were compared with experimental results. Anisotropic turbulence models such as the nonlinear k - [curly epsilon] and the second-order closure models predicted the turbulence-driven secondary flow in the triangular channel and the distributions of the time mean velocity and temperature showing significantly improved agreement with the measurements from the linear standard k - [curly epsilon] model. The anisotropic turbulence models predicted the turbulence structure for a rod bundle with a large P/D fairly well but could not predict the very high turbulence intensity of the azimuthal velocity observed in the narrow flow region (gap) for a rod bundle with a small P/D.
