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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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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.
Kingsley F Graham, John M. Carpenter
Nuclear Science and Engineering | Volume 49 | Number 4 | December 1972 | Pages 418-437
Technical Paper | doi.org/10.13182/NSE72-A22562
Articles are hosted by Taylor and Francis Online.
Measurements of the time and energy dependence of the spectrum of slow neutrons emerging from small pulsed moderators are reported. The results are presented with absolute normalization. Our techniques made measurements possible using a 150 keV Cockroft-Walton D-T neutron generator, producing 1011 n/sec (peak). Energy spectra and time distributions at various energies are reported for slabs of polyethylene at 296°K, and polyethylene, solid ammonia, and solid methane at 77 °K. Variations of yield with overall moderator thickness are described. The effects on spectra and time distributions are elucidated by a series of measurements with cadmium heterogeneous poison at various depths beneath the moderator surface. We compare cadmium and gadolinium heterogeneous poisons, which differ in the energy below which the poison is effective. Results are useful for pulsed moderator design, and as tests of neutron scattering kernels and methods of calculation.