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Division Spotlight
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.
Meeting Spotlight
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.
R. W. Shumway, D. M. McEligot
Nuclear Science and Engineering | Volume 46 | Number 3 | December 1971 | Pages 394-407
Technical Paper | doi.org/10.13182/NSE71-A22376
Articles are hosted by Taylor and Francis Online.
Numerical results for laminar gas flow in annuli, with fluid properties varying due to their temperature dependence, have been obtained for both fully developed and uniform entry velocity profiles by solving the coupled boundary layer equations in finite difference form. All annuli computations were made with a radius ratio of 0.25, which differs sufficiently from the limiting cases of circular tubes and parallel plates to portray annular geometry well. In addition to variable property results, predictions were obtained for three of four fundamental, constant property solutions with uniform entering velocity profiles. The fourth solution is available in the literature but the approximate velocity distribution is in error in the entrance region, so a new hydrodynamic solution is presented as well.