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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.
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2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott 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
Countering the nuclear workforce shortage narrative
James Chamberlain, director of the Nuclear, Utilities, and Energy Sector at Rullion, has declared that the nuclear industry will not have workforce challenges going forward. “It’s time to challenge the scarcity narrative,” he wrote in a recent online article. “Nuclear isn't short of talent; it’s short of imagination in how it attracts, trains, and supports the workforce of the future.”
R. M. Bansal, S. P. Tewari, L. S. Kothari
Nuclear Science and Engineering | Volume 76 | Number 1 | October 1980 | Pages 18-29
Technical Paper | doi.org/10.13182/NSE80-A19289
Articles are hosted by Taylor and Francis Online.
A new scattering kernel for heavy water has been proposed. The kernel takes into account the chemical binding energy effects and also includes the rotational and intramolecular vibrational modes. Using this scattering kernel, various neutron transport processes in the temperature range 5 to 60°C have been studied and compared with the corresponding experimental results. The calculated results include 1. total neutron scattering cross section at 20°C 2. asymptotic decay of neutron pulses in the temperature range 5 to 60°C and temperature variation of the diffusion coefficient and diffusion cooling coefficient 3. time-dependent spectra inside finite-sized assemblies of heavy water at 20 and 43.3°C 4. thermalization time 5. diffusion length and space-dependent study in pure and poisoned assemblies of heavy water.