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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.”
Hans Jordan, Philip M. Schumacher, Vladimir Kogan
Nuclear Technology | Volume 72 | Number 2 | February 1986 | Pages 148-157
Technical Paper | Nuclear Safety | doi.org/10.13182/NT86-A33737
Articles are hosted by Taylor and Francis Online.
A two-component aerosol system is investigated using the MSPEC code, which models the dynamic behavior of particle composition as a function of particle size. The predicted aerosol concentration behavior is shown to be sensitive to several parameters and model choices, in contrast to the situation for singlecomponent aerosol systems, where these parameters and models appear to play a distinctly uncritical role. In addition, the predicted aerosol concentration behavior is shown to significantly diverge from that predicted by MSPEC using a “single-component” model mode that assumes uniform particle composition across the size distribution. This latter mode is common to codes presently used for nuclear accident source term evaluations. These findings point to the need for an expanded experimental data base, both to validate multiple-component aerosol behavior codes and to supply the necessary data to drive them.
