ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
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.
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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August 2024
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.
D. E. Parks, J. R. Beyster, N. F. Wikner
Nuclear Science and Engineering | Volume 13 | Number 4 | August 1962 | Pages 306-324
Technical Paper | doi.org/10.13182/NSE62-A26173
Articles are hosted by Taylor and Francis Online.
A pulsed, high-current, electron linear accelerator is used to excite thermal-neutron spectra in a graphite assembly. The steady-state energy spectra of neutrons are measured at several temperatures by pulsed-beam time-of-flight techniques. We compare the measured spectra with theoretical predictions which use free- and bound-carbon scattering kernels. The scattering kernel for carbon bound in graphite is obtained through a realistic treatment of the neutron-phonon interactions. With this kernel, theoretical calculations of spectra agree extremely well with the experimental results. Predictions derived from a scattering law in which the carbon atoms are treated as free differ markedly from the measured spectra, even up to a temperature of 810°K. Additional calculations show that the effects of chemical binding are significant in problems of reactor design physics.
