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Division Spotlight
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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
New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
Harold F. McFarlane
Nuclear Science and Engineering | Volume 49 | Number 4 | December 1972 | Pages 438-449
Technical Paper | doi.org/10.13182/NSE72-A22563
Articles are hosted by Taylor and Francis Online.
We have performed integral measurements of pulsed neutron distributions in graphite stacks ranging in buckling from 0.0051 to 0,018 cm−2 and have compared the results to a modeled theoretical computation. Based on these measurements, we have defined a critical buckling of 0.0085 cm−2 above which the decay of the neutron pulse is non-exponential. Non-exponential decay was observed in six graphite stacks which exceeded the critical buckling, while in three larger assemblies the decay was exponential over a significant part of the total measuring interval. From measurement of the time-dependent spatial distribution in four graphite assemblies, we were able to compute the effective decay constants of the two lowest order spatial modes as well as the time-dependent effective wave number of the distributions. We have interpreted the failure of the neutron distribution to establish either an exponential decay or an asymptotic spatial distribution in terms of recent theoretical work in this area.