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Conference Spotlight
2025 ANS Winter Conference & Expo
November 8–12, 2025
Washington, DC|Washington Hilton
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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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Nuclear News 40 Under 40—2025
Last year, we proudly launched the inaugural Nuclear News 40 Under 40 list to shine a spotlight on the exceptional young professionals driving the nuclear sector forward as the nuclear community faces a dramatic generational shift. We weren’t sure how a second list would go over, but once again, our members resoundingly answered the call, confirming what we already knew: The nuclear community is bursting with vision, talent, and extraordinary dedication.
R. A. Karam
Nuclear Science and Engineering | Volume 37 | Number 2 | August 1969 | Pages 192-197
Technical Paper | doi.org/10.13182/NSE69-A20678
Articles are hosted by Taylor and Francis Online.
An experimental method for the determination of the normalization integral (denominator of perturbation expression) has been developed and used in three fast assemblies. The procedure consists of measuring the apparent reactivity associated with a calibrated 252Cf neutron source at a known power level. The method is independent of the geometrical configuration of the nuclear reactor. Additionally the spatial distributions of the importance of fission neutrons were measured by observing the rate of the linear increase of the neutron population due to the 252Cf source as a function of position in each fast assembly. The measured values of the normalization integrals (N.I.) as well as the measured distribution of were higher than those obtained with multigroup calculations.
