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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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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.
A. Z. Akcasu, C. M. Bost, Jr.
Nuclear Science and Engineering | Volume 47 | Number 1 | January 1972 | Pages 104-115
Technical paper | doi.org/10.13182/NSE72-A28423
Articles are hosted by Taylor and Francis Online.
The concept of multiple-input zero power describing functions is introduced in terms of the nonlinear response of a zero power reactor to a large periodic reactivity input, and the dual-input zero power describing function is calculated explicitly. The effect of amplitude and phase of the second input on the describing function is investigated numerically. The zero power describing function is used to construct the describing function at high power using closed loop feedback circuit theory. This approach allows nonlinear effects and feedback effects to be discussed separately. The nonlinear stability of a two-temperature reactor is investigated using the high power describing function and Nyquist stability criterion with particular attention to the existence and stability of limit cycles. In addition, the discrepancies between various definitions of the describing function are discussed and clarified.