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Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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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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.
I. C. Goyal, L. S. Kothari
Nuclear Science and Engineering | Volume 23 | Number 2 | October 1965 | Pages 159-166
Technical Paper | doi.org/10.13182/NSE65-A28140
Articles are hosted by Taylor and Francis Online.
Equilibrium neutron energy spectra inside finite blocks of beryllium at different temperatures have been calculated by solving the energy-dependent Boltzmann equation in the diffusion approximation by numerical iteration. Different sizes of the assembly have been considered. The values of the transport mean free path, λtr (E), (for various temperatures) have been taken from earlier work. Because of the peaks in the transport mean free path, the calculated equilibrium flux differs markedly from the Maxwellian, particularly for small sizes and low temperatures. Calculations also give the values of the decay constant, λ for equilibrium neutrons. Values of λ based on Placzek kernel agree very well with the experimental values. The reasons why the present calculated values, as also the experimental values of λ, exceed Corngold's theoretical upper bound have been discussed. The effect on λ of ‘trapped neutrons’ and that of cold neutrons has also been studied by taking different forms for σtr (E).