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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
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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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February 2025
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Latest News
IEA report: Challenges need to be resolved to support global nuclear energy growth
The International Energy Agency published a new report this month outlining how continued innovation, government support, and new business models can unleash nuclear power expansion worldwide.
The Path to a New Era for Nuclear Energy report “reviews the status of nuclear energy around the world and explores risks related to policies, construction, and financing.”
Find the full report at IEA.org.
Ajoy K. Ghatak, Theodore J. Krieger
Nuclear Science and Engineering | Volume 21 | Number 3 | March 1965 | Pages 304-311
Technical Paper | doi.org/10.13182/NSE65-A20033
Articles are hosted by Taylor and Francis Online.
The thermalization of a pulse of fast neutrons in a large, homogeneous water assembly is investigated numerically. The effect of chemical binding is studied by comparing the results obtained with the free-hydrogen gas and the Nelkin kernels. It is found that chemical binding has an observable effect on some of the quantities of interest in a pulsed-neutron experiment. Two definitions of mean slowing-down time are considered and their relationship examined. Comparisons are made to several experimental measurements and earlier calculations.
