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Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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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
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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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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.
W. M. Wilson, H. E. Jackson, G. E. Thomas
Nuclear Science and Engineering | Volume 63 | Number 1 | May 1977 | Pages 55-62
Technical Paper | doi.org/10.13182/NSE77-A27004
Articles are hosted by Taylor and Francis Online.
The gamma-ray spectrum resulting from neutron capture in the 2.8-keV resonance of 23Na has been measured with the high-resolution annihilation pair spectrometer at the internal-target facility of the CP-5 reactor. The 2.8-keV resonance was populated by using the boron-shielded target technique: A½-in.-thick filter of 10B surrounding the sodium sample selectively removes low-energy neutrons from the spectrum; the 1/E dependence of the incident neutron flux assures a low intensity of high-energy neutrons. Capture, predominantly in the 2.8-keV resonance, is indicated by a 2- to 3-keV shift in the energies of the primary transitions relative to those observed in thermal-neutron capture. The correlation between the absolute intensities of the resonance transitions and the thermal transitions (measured by others) is computed and discussed in terms of a numerical analysis. (The resonance and thermal intensities are identical within the precision of the measurement.) The results indicate that the resonance total radiation width is 0.24 eV Γγ 0.40 eV.
