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
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
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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October 2024
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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.
Melvin M. Levine
Nuclear Science and Engineering | Volume 7 | Number 6 | June 1960 | Pages 545-551
Technical Paper | doi.org/10.13182/NSE60-A25764
Articles are hosted by Taylor and Francis Online.
Breeding ratios for clean near-thermal systems containing only U233 and moderator have been presented by Chernick and Moore (1). The present work treats Pu239 systems also and extends the results in both systems to take account of the effects of the higher isotopes and fission products. The extra absorption by these higher isotopes tends to depress the breeding ratio, but fission in U235 or Pu241 compensate for this, and the net effect, as will be seen, is an increase in breeding ratio for plutonium-fuelled systems.