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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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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.
E. Linn Draper, Jr.
Nuclear Science and Engineering | Volume 46 | Number 1 | October 1971 | Pages 31-41
Technical Paper | doi.org/10.13182/NSE71-A22333
Articles are hosted by Taylor and Francis Online.
Integral fission rates were measured for 232Th, 233U, 235U, 236U, 238U, 237Np, 239Pu, 248Pu, 241Pu, 241Am, 232mAm, and 243Am in four tailored epicadmium neutron spectra. The fission rates were determined by counting fission fragment tracks in solid-state track recorders. The measured and calculated fission rates differed by <7% for 232Th, 233U, 238U, 236U, and 237Np in each spectrum. There is evidence that the 232Th, 238U, and 237Np differential data need slight normalization corrections. Plutonium-239, 240Pu, 241 Pu, 241 Am, 242mAm, and 243Am each exhibited larger deviations of measured from calculated activities than the lighter nuclides. The magnitude of the deviations varied from one spectrum to another for some materials, indicating the possibility of not only magnitude but also shape uncertain-ties for the differential cross sections.
