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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.
E.A. Straker
Nuclear Science and Engineering | Volume 46 | Number 3 | December 1971 | Pages 334-355
Technical Paper | doi.org/10.13182/NSE71-A22371
Articles are hosted by Taylor and Francis Online.
Calculations have been made of the space, energy, angle, and time dependence of the neutron and secondary gamma-ray fields produced in the atmosphere by several neutron sources, and the results for a 12.2- to 15-MeV source and a fission source are compared in this paper. They include steady-state and time-dependent results at ranges out to 1500 m for both an infinite air medium and an air-over-ground medium, the latter for source heights of 15 and 343 m. The data show that the neutron doses and dose rates from the 12.2- to 15-MeV source are higher than those from the fission source in all geometries and time intervals. While the secondary gamma-ray doses produced by the 12.2- to 15-MeV source also are higher than those produced by the fission source in all geometries, the secondary dose rates are higher only for times less than 10-3 sec, after which the dose rates from the two sources are comparable. The effects of the ground are to enhance both the neutrons and the secondary gamma rays at ranges close to the source and to act as an absorber at ranges far from the source. These effects decrease with increasing source height.
