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Division Spotlight
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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
DOE-EM awards $74.8M Oak Ridge support services contract
The Department of Energy’s Office of Environmental Management has awarded a five-year contract worth up to $74.8 million to Independent Strategic Management Solutions for professional support services at the Oak Ridge Office of Environmental Management site in Oak Ridge, Tenn.
S. Shalev, G. Shani, Z. Fishelson, and Y. Ronen
Nuclear Science and Engineering | Volume 35 | Number 2 | February 1969 | Pages 259-266
Technical Paper | doi.org/10.13182/NSE69-A21141
Articles are hosted by Taylor and Francis Online.
As part of a comprehensive project to investigate the validity of pulsed-neutron measurements in small systems, we have measured the extrapolation length in a pulsed light-water system with B2 = 0.11/cm2. Space- and time-dependent flux distributions were obtained with a miniature fission chamber and were analyzed by least-squares techniques. Special attention was paid to the extraction of the fundamental mode and to the overall internal consistency of the results. The thermal-neutron extrapolation length, corrected to 20°C, was found to be 0.300 ± 0.015 cm.
