Abstract
The vast majority of the manpower and funding involved in the Manhattan Project were devoted to producing fissile material. Uranium-235 had to be separated from natural uranium, and plutonium had to be synthesized in nuclear reactors. In this chapter we examine some of the physics behind these processes. Historically, the first major step along these lines occurred when Enrico Fermi and his collaborators achieved the first operation of a self-sustaining chain-reaction on December 2, 1942, with their CP-1 (“Critical Pile 1” or “Chicago Pile 1”) reactor. This proved that a chain-reaction could be created and controlled, and opened the door to the design and development of large-scale plutonium-production reactors located at Hanford, WA. We thus look first at issues of reactor criticality (Sects. 3.1 and 3.2), and then examine plutonium production (Sect. 3.3). Sections 3.4 and 3.5 are devoted to analyzing techniques for enriching uranium.
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Reed, B.C. (2021). Producing Fissile Material. In: The Physics of the Manhattan Project. Springer, Cham. https://doi.org/10.1007/978-3-030-61373-0_3
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DOI: https://doi.org/10.1007/978-3-030-61373-0_3
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