ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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.
John C. Lee
Nuclear Science and Engineering | Volume 54 | Number 2 | June 1974 | Pages 206-214
Technical Note | doi.org/10.13182/NSE74-A23410
Articles are hosted by Taylor and Francis Online.
Application of a θ-difference technique to the finite-difference solution of xenon-induced spatial transients has been made, which shows a substantial improvement in the accuracy of the calculated stability index and oscillation period. Virtually no correction is necessary for time-step lengths up to two hours, so an accurate simulation of experimental tests can be performed explicitly in the time domain with fairly crude time-step lengths. A simple expression was obtained for the optimum value of the parameter, θ, that can minimize the calculational error for a broad range of the core stability. The method is expected to be applicable for controlled xenon transients as well as for free-running oscillations.