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Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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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.
Edward W. Larsen
Nuclear Science and Engineering | Volume 60 | Number 4 | August 1976 | Pages 357-368
Technical Paper | doi.org/10.13182/NSE76-A26897
Articles are hosted by Taylor and Francis Online.
We construct an asymptotic solution of the neutron transport equation in a large heterogeneous medium using a multiscale method. The solution is asymptotic with respect to a small dimensionless parameter, ϵ, which is defined as the ratio of a mean-free-path to the diameter of the medium. The leading term of the solution is the product of two functions, one determined by a cell calculation and the other as the solution of a diffusion equation. The coefficients in the diffusion equation contain functions that are determined by cell calculations ard are then averaged over the cell. We compare the asymptotic diffusion coefficients to other “homogenized” dif usion coefficients that have been proposed in the literature and show that a substantial numerical disagreement exists for a large class of problems. We also give a physical interpretation to the asymptotic solution and to the numerical results concerning the asymptotic diffusion coefficients.