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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.
R. S. Reynolds
Nuclear Science and Engineering | Volume 51 | Number 2 | June 1973 | Pages 102-112
Technical Paper | doi.org/10.13182/NSE73-A26585
Articles are hosted by Taylor and Francis Online.
Experiments have been performed which give further insight into the so-called “in-and-down” scattering problem. Experimental ceiling attenuation factors have been developed and compared with previously published results of radiation attenuation in basement ceilings.The experiments were performed on a full-scale structure with basement ceiling mass thicknesses of 12 and 0 psf at several solid angle fractions. Additional experiments were performed for several ceiling mass thicknesses at a solid angle fraction near unity. Generally, the experiments showed that previously published ceiling attenuation factors appear inadequate for large solid angle fractions and large overhead mass thicknesses. For small mass thicknesses and solid angle fractions below ≈0.8, the agreement between experiment and previously published results is reasonable. It is clear that ceiling attenuation factors should demonstrate a solid angle fraction dependence as well as a mass thickness dependence. However, these experiments show that there is no reason to believe that in the limit as the solid angle fraction approaches unity, the ceiling attenuation factor should approach old formulations which had no solid angle fraction dependence.It has also been shown in this work that ceiling attenuation factors may be experimentally determined solely from finite field data. There is no need to estimate far-field contributions or skyshine contributions in the determination of ceiling attenuation factors.