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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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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.
J. V. Muralidhar Rao, S. M. Lee
Nuclear Science and Engineering | Volume 82 | Number 1 | September 1982 | Pages 71-77
Technical Paper | doi.org/10.13182/NSE82-A19029
Articles are hosted by Taylor and Francis Online.
The homogenized neutron diffusion equation for Benoist’s uncorrected diffusion coefficients is derived. The approximations in the asymptotic and buckling methods are analyzed to show that both these methods are identical and that Benoist’s corrected diffusion coefficients should not be used in the diffusion equation. Furthermore, the practical limitations of the homogenization methods are discussed, and it is pointed out that the use of Benoist’s uncorrected coefficients in the diffusion equation may be superior to the use of the coefficients of Larsen or of Deniz and Gelbard. It is also recommended, in view of the severe approximations made in the transport theory to arrive at the homogenization prescriptions, that the accuracy in the results of the homogenization methods should be examined for a few benchmarks in slab geometry which are amenable to transport theory solution.