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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.
Marvin Tetenbaum, Larry Mishler, Glenn Schnizlein
Nuclear Science and Engineering | Volume 14 | Number 3 | November 1962 | Pages 230-238
doi.org/10.13182/NSE62-A26211
Articles are hosted by Taylor and Francis Online.
Because ignition temperature is not an intrinsic property of a substance, the investigation reported in this paper was undertaken to measure the ignition behavior of uranium powder under well-defined boundary conditions such that quantitative predictions are possible. The ignition behavior of uranium powder has been found to be dependent on specific area of powder fraction, rate of heating, and geometry of sample. For a given mesh size powder and heating rate, constant limiting ignition temperature values are obtained practically independent of container size, when the powder bed exceeds a critical height. Critical height values are found to increase with particle size of powder; for a given particle size powder, critical height values decrease with heating rate. On the basis of the Frank-Kamenetskii theory of thermal explosions, when used in a restricted manner, limiting ignition temperature values for uranium powder can be estimated using critical height values as the significant geometrical dimension of the container. These calculated ignition temperatures are in reasonable agreement with those obtained with our experimental apparatus. The ignition behavior of uranium powder can be adequately described by converting isothermal expressions to a rising temperature basis according to the treatment of Murray, Buddery, and Taylor.