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Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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.”
Gregory J. Van Tuyle, John C. Lee
Nuclear Science and Engineering | Volume 75 | Number 3 | September 1980 | Pages 225-242
Technical Paper | doi.org/10.13182/NSE80-A19055
Articles are hosted by Taylor and Francis Online.
A linearized formulation of the basic fluid conservation equations for describing the dynamic behavior of nuclear steam generators is presented. The model utilizes a movable boundary spatial discretization technique in one-dimensional geometry and is capable of representing the transient behavior of integral-economizer once-through steam generator (IEOTSG) units in the time and frequency domains. A generalized boundary treatment algorithm is developed to place and track boundaries between heat transfer regimes on the secondary side of a steam generator. An enthalpy transport model is incorporated in a manner consistent with the movable boundary formulation to reduce the nonphysical representation of the in-cell distribution of enthalpy with long axial regions and weighting functions. Results of transient calculations performed with the linearized model agree well with other computational results, as well as with the experimental data obtained at a 19-tube IEOTSG test facility.
