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Devoted specifically to the safety of nuclear installations and the health and safety of the public, this division seeks a better understanding of the role of safety in the design, construction and operation of nuclear installation facilities. The division also promotes engineering and scientific technology advancement associated with the safety of such facilities.
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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.
Sevim Tan
Nuclear Science and Engineering | Volume 30 | Number 3 | December 1967 | Pages 436-447
Technical Paper | doi.org/10.13182/NSE67-A18403
Articles are hosted by Taylor and Francis Online.
A solution of the zero-power kinetic equations for sinusoidal excess reactivity insertions, previously obtained by the author by Wentzel-Kramers-Brillouin approach (WKB), is further discussed. Explicit equations for the reactor period, reactivity bias, and stabilized reactor response, within the range of applicability of the method, are derived. Harmonic contents of the logarithm of flux for both pure and properly biased sinusoidal reactivity variations are analyzed. Fourier components of flux yielding the new steady-state mean power, the fundamental and the second harmonic are given. Results of the treatment are extended to the describing function of a low-power nuclear reactor and the major error involved in the earlier literature is indicated. The procedure, although developed under the assumption of one average group of delayed neutrons, is expected to yield very satisfactory results even if generalized to multigroup treatment.