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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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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
DTE Energy studying uprate at Fermi-2, considers Fermi-3’s prospects
DTE Energy, the owner of Fermi nuclear power plant in Michigan, is considering an extended uprate for Unit 2 that would increase its 1,100-MW generation capacity by 150 MW.
J. J. Steyn, D. G. Andrews
Nuclear Science and Engineering | Volume 27 | Number 2 | February 1967 | Pages 318-327
Technical Paper | doi.org/10.13182/NSE67-A18271
Articles are hosted by Taylor and Francis Online.
Differential angular and energy distributions of backscattered gamma rays have been measured for photons normally incident on essentially semi-infinite scattering media of various atomic numbers. The measurements have been made by permitting a highly collimated 3- × 3-in. sodium-iodide (thallium-activated) scintillation crystal to view a sample area at the center of a scattering slab region irradiated by a broad beam of gamma radiation. The spectra have been recorded on a 400-channel pulse-height analyzer and reduced to detector incident flux by means of an IBM-7094 digital computer. The results have then been expressed graphically in terms of albedos and fitted to simple empirical expressions. In the case of high-atomic-number scatterers, K x-ray fluorescence has been separately evaluated.
