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Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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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.”
E. D. Arthur
Nuclear Science and Engineering | Volume 76 | Number 2 | November 1980 | Pages 137-147
Technical Paper | doi.org/10.13182/NSE80-A19446
Articles are hosted by Taylor and Francis Online.
The mass region around A = 90 was chosen for examination of the validity of nuclear models and input-parameter determination techniques often used to meet nuclear data requirements where no experimental data exist. Consistent sets of input parameters, determined through analysis of independent data available in this mass region, were applied to the calculation of all major neutron reactions on 89Y and 90Zr occurring between 0.05 and 20 MeV. These parameters were then tested under even more stringent conditions through calculation and comparison to experimental data on unstable target nuclei available for neutron energies of 14 to 15 MeV. These calculations, both on stable and unstable nuclei, serve to indicate that reliable cross-section predictions can be obtained from nuclear models that use carefully determined parameters verified in concurrent comparisons to available experimental data.