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Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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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.
D. M. Johnson
Nuclear Science and Engineering | Volume 54 | Number 3 | July 1974 | Pages 235-253
Technical Paper | doi.org/10.13182/NSE74-A23415
Articles are hosted by Taylor and Francis Online.
In reactor design there is a requirement for a practical and economic method of predicting gamma-ray spectra throughout bulk shields. The commonly used build-up factor technique suffers the disadvantage of not predicting primary physical quantities, and the more sophisticated transport methods require considerable computer time and expertise to be effective. In the method developed here, an order of scattering model has been used with a spatial cell scheme and an energy multigroup system, but the usual limitation of computational complexity has been overcome by an angular approximation. An equilibrium property in the behavior of the angular penetration spectra has been incorporated in an anisotropic scatter approximation which tends, in the low energy limit, to become isotropic. The code has been tested over a range of penetrations and source energies, and the results are compared with the Monte Carlo method; similar results through an interface are given. Extension of the model to more complex geometries has been considered briefly.