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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
W. L. Whittemore
Nuclear Science and Engineering | Volume 18 | Number 2 | February 1964 | Pages 182-188
Technical Paper | doi.org/10.13182/NSE64-A18317
Articles are hosted by Taylor and Francis Online.
The General Atomic neutron-velocity selector has been used at the electron linear accelerator to study the inelastic scattering by liquid methane and liquid parahydrogen of monoenergetic neutrons with incident energies in the range 0.009 to 0.17 eV. The energy dependence of the total cross sections and the neutron spectra produced by specimens of these materials have also been measured. The inelastic scattering of slow neutrons (< 0.010 eV) at 90° by liquid parahydrogen appears to be smaller than expected on the basis of the measured total cross section and the angular dependence calculated by Sarma. Perhaps this is related to the fact that the total cross section is larger than for freely rotating molecules, indicating the possible existence of some hindrance to molecular motion. The slowing-down power, σnE0/E, a quantitative measure of the neutron-moderating ability, is evaluated from the measured inelastic neutron-scattering data and compared for various neutron energies for the two liquids. A consideration of the various data leads to the conclusion (1) that solid methane is better than liquid parahydrogen for production of very “cold” neutrons (E0 < 0.007 eV), and (2) that parahydrogen is superior to liquid methane for production of cold neutrons with E0 < 0.005 eV.