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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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2024 ANS Winter Conference and Expo
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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.
S. Pelloni
Nuclear Science and Engineering | Volume 82 | Number 4 | December 1982 | Pages 458-461
Technical Note | doi.org/10.13182/NSE82-A21459
Articles are hosted by Taylor and Francis Online.
In this Note a new iterative method for solving the monoenergetic diffusion equation is presented. Experience has shown that the usual iterative methods used to solve the resulting equations either do not converge at all or the number of inner iterations becomes too large when a high-order approximation is used for the spatial flux. Our aim therefore has been to develop a new iterative method that leads to a small number of iterations even for a high order of spatial flux approximation. The present method is additionally expedited using Chebyshev or Wagner and Andrzejewski procedures, which are compared.The SAPHIR benchmark test case with a fixed volume source was used for calculations because it is difficult to converge. It is shown that the present method needs almost the same number of iterations for Lagrangian flux approximation of first to fourth order. This number is smaller than 53. The Chebyshev procedure, which was the most effective, halved the number of inner iterations.
