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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.”
Fu-Long Chen, Shih-Hai Li, Ge-Ping Yu
Nuclear Technology | Volume 95 | Number 1 | July 1991 | Pages 54-63
Technical Paper | Radioactive Waste Management | doi.org/10.13182/NT91-A34567
Articles are hosted by Taylor and Francis Online.
For the final disposal of high-level waste (HLW), the possibility of a repository sited below the fresh/saline groundwater interface within islet rock formations is analyzed. Because of their relatively stable tectonics, the offshore islets of some countries (such as those of Taiwan) are worthy. of being considered as potential repository sites. Before the emplacement of radwastes in such a repository, however, the mass exchange across the fresh/saline groundwater interface must be limited and the horizontal movement of advective saline ground-water must be extremely low. Theoretical equations for the location and shape of the interface are derived. When radwastes are buried in rock formations, the temperature effect of the decay heat could cause buoyant convection flow of saline groundwater upward across the groundwater interface. This could carry released radionuclides across the groundwater interface to upper formation layers where fresh groundwater flows. The radionuclides could then be carried by the fresh groundwater to the sea. Although basic HLW repository designs should eliminate the significance of this temperature effect, it is incorporated into this preliminary analysis for the purpose of conservative estimations. Radionuclide transport behavior in an islet site is compared to that in an inland site in which a repository would be built in partially saturated fractured media. The total effects of radionuclide transport for the islet site is similar to that for the inland site. Although the lack of information limits more detailed, quantitative predictions, the possibility of islet disposal sites for HLW is worthy of notice, and more research efforts toward investigation of islet sites are warranted.