ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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.
R. Spencer, J. A. Harvey, N. W. Hill, L. W. Weston
Nuclear Science and Engineering | Volume 96 | Number 4 | August 1987 | Pages 318-329
Technical Paper | doi.org/10.13182/NSE87-A16395
Articles are hosted by Taylor and Francis Online.
The Bayesian method was applied to the simultaneous fitting of neutron transmission measurements on five thin and two thick samples of 240Pu to obtain the parameters of the very large resonance near 1 eV. The results of the analysis are E0 = 1.0564 ± 0.0006 Γγ, = 30.3 ± 0.3 meV, and Γn = 2.45 ± 0.02 meV. Some evidence in the data of a small deviation from the usual “weak binding” model for Doppler broadening of the theoretical resonance shape is presented. Transmission measurements on samples of 235U, 239Pu, and 240Pu also were made over the thermal energy region and their neutron total cross sections were derived. Fits of the form A + B to the cross-section data in the interval from 0.02 to 0.03 eV resulted in the values 690 ± 5, 1025 ± 6, and 284 ± 2 b for the 2200 m/s total cross sections of 235U, 239Pu, and 240Pu, respectively.
