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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.”
Yujiro Ikeda, Fujio Maekawa, Robert Johnson, Yoshimi Kasugai, Yoshitomo Uno, Edward T. Cheng
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 714-718
Neutronics Experiments and Analysis | doi.org/10.13182/FST98-A11963698
Articles are hosted by Taylor and Francis Online.
Induced radioactivity characteristics of vanadium alloys irradiated with 14 MeV neutrons were investigated. Short and long 14 MeV irradiation modes were employed to distinguish the characteristic of radioisotopes according to their half-lives. Radioactivities in several different V-alloy samples were measured by the γ-ray spectrometry. Along with the radionuclides induced in the major constituents, those from impurities were simultaneously identified by the activation analysis. The decay profiles of the induced radioisotopes were compared with the calculation using the comprehensive activation cross section libraries of FENDL/A-2,.0 and JENDL-ACT96. From the ratios of calculation and experiment (C/E), it was proved that the FENDL/A-2.0 and JENDL-ACT96 are adequate to predict the dominant radionuclide in V, Ti, and Cr. However, there was significant underestimation for activation products of impurities of Si, Fe, Ni, Nb and possibly Mo. In particular, the amounts of Nb impurity, which ranges from 70 to 100 ppm, is almost the same as that of the chemical analysis.