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Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
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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.
H. E. Hungerford, R. F. Mantey, L. P. Van Maele
Nuclear Science and Engineering | Volume 6 | Number 5 | November 1959 | Pages 396-408
Technical Paper | doi.org/10.13182/NSE59-A25678
Articles are hosted by Taylor and Francis Online.
Investigation and development of several new materials for high-temperature shields have yielded three reasonably cheap materials which are structurally stable and able to withstand high temperatures and high radiation fields. Calculations indicate good neutron attenuation properties. These materials have undergone extensive development and testing for both physical and radiation effect data. They are (1) serpentine rock, (2) calcium borate, and (3) borated diatomaceous earth. Serpentine rock (3 MgO·SiO2·2H2O), as asbestos mineral, retains its water of hydration to temperatures as high as 950°F. It can be used either dry-packed, or as the aggregate in concrete, with densities attainable of about 130 lb/cu ft. Structurally, the aggregate is not quite as good as concrete. Calcium borate is the commercial name applied to a number of borated calcium minerals pressed into an asbestos matrix to give a boron content of about 12 w/o, with a density of over 70 lb/cu ft. Although the composite is brittle, it can be fabricated into shapes rather easily. Tests indicate it will withstand temperatures up to 1800°F with less than 3% shrinkage, and can be exposed to a neutron irradiation of 2.4 × 1020 nvt without damage. Diatomaceous earth, a porous commercial refractory material, has been successfully borated to the extent of about 2 w/o boron. It can be used as an aggregate in portland or lumnite concrete to give good strength properties and densities of 78–82 lb/cu ft.