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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.
L. F. Rodriguez, A. Shapiro
Nuclear Science and Engineering | Volume 49 | Number 3 | November 1972 | Pages 349-357
Technical Paper | doi.org/10.13182/NSE72-A22547
Articles are hosted by Taylor and Francis Online.
Experimental methods which utilize incident bremsstrahlung radiation have been developed for rigorously evaluating gamma-ray shielding calculational methods and for determining gamma-ray shielding design parameters over a continuous energy span. Comparisons between experimentally determined double differential transmitted spectra, i.e., the spectra as a function of energy and angle, with corresponding calculated transmitted spectra, provides a rigorous test of the calculation. Additionally, by varying the maximum energy of the incident bremsstrahlung radiation, the kernel governing the angle and energy distribution of the transmitted photons can be unfolded from the spectra. A knowledge of this kernel allows calculations to be made of other parameters, such as build-up factors, transmitted doses, etc. Reasonably accurate kernels were obtained by subtracting out the contribution due to single collisions, and by smoothing the remaining multicollision component by applying Cook’s least structure analysis. To establish the methods, collimated beams of bremsstrahlung radiation were directed against an iron slab and the experimental results were compared to those obtained from the multigroup Monte Carlo code MORSE. Transmission measurements were taken at angles of 0, 30, and 60 deg from the incident direction. After modifying the estimator subroutine in MORSE, the spectral agreement obtained was excellent. The kernels obtained by inputting an incident constant group unit source in MORSE agreed favorably with those obtained experimentally from incident bremsstrahlung spectra.