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
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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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Latest News
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.
Gary M. Sandquist
Nuclear Science and Engineering | Volume 37 | Number 3 | September 1969 | Pages 443-450
Technical Paper | doi.org/10.13182/NSE69-A19118
Articles are hosted by Taylor and Francis Online.
A method for determining stabilizing control functions for any first-order controllable system is presented. Examples of stabilizing feedback control are examined and corroborated for stability using the second method of Liapunov. Consideration of a general class of arbitrary degree stabilizing feedback-control functions reveals that linear feedback control produces the greatest damping. Examination of signal error and time delay in the control function shows that highly damping control can result in system oscillation. Finally the method is extended to systems of higher order and a stabilizing control function is found for the reactor-kinetic equations even with unmonitored delayed neutrons if the linear feedback-control gain is > β/l.
