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Division Spotlight
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.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
Standards Program
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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Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
H. W. Lefevre, J. C. Davis, J. D. Anderson
Nuclear Science and Engineering | Volume 70 | Number 1 | April 1979 | Pages 60-65
Technical Paper | doi.org/10.13182/NSE79-A18927
Articles are hosted by Taylor and Francis Online.
When collectively accelerated deuterons in pulsed electron beam machines interact with structural materials and insulators, they produce neutrons that can be used for diagnostic purposes. This paper describes a method for synthesizing neutron spectra that such devices might produce. It involves averaging experimental nuclear reaction data over angle and over energy to approximate the distributions in angle and in energy of deuterons as they impinge upon materials. Neutron time-of-flight (TOF) spectra were obtained using the Lawrence Livermore Laboratory tandem Van de Graaff accelerator and a 16-detector TOF spectrometer. Spectra were recorded at each of 16 angles for deuterons having energies of 2.5, 3.0, and 3.5 MeV on thick targets of carbon, aluminum, Teflon, CH2, and CD2. When summed over 4π sr at constant neutron energy to approximate (for example) the neutron spectrum from isotropic mono-energetic deuterons, the 19F(d,n) and 27Al(d,n) spectra still show well-resolved high-energy peaks at each bombarding energy. The synthesized TOF spectra that would be observed for such a case with pulse mode detectors and those that would be observed with current mode scintillation detectors are presented.