ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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.
C. A. Anderson, Jr., T. J. Thompson
Nuclear Science and Engineering | Volume 18 | Number 4 | April 1964 | Pages 474-480
Technical Paper | doi.org/10.13182/NSE64-A18766
Articles are hosted by Taylor and Francis Online.
Energy spectra of neutrons leaking from the core tank of the Massachusetts Institute of Technology heavy-water-moderated reactor have been measured with a “fast” neutron chopper. The energy range 2 × 10-3 eV to 2 × 105 eV was examined for three different fuel configurations. The spectra are fairly well described as the sum of a Maxwell-Boltzman distribution and a dE/E slowing-down distribution. The energy resolution, ΔE/E, is less than 5% at energies below 100 eV and varies as E½ above 100 eV, while the probable error in current, ΔJ/J, is less than 10% at all energies.