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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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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.
G. F. Carpenter, N. R. Knopf, E. S. Byron
Nuclear Science and Engineering | Volume 19 | Number 1 | May 1964 | Pages 18-38
Technical Paper | doi.org/10.13182/NSE64-A19786
Articles are hosted by Taylor and Francis Online.
The effects of neutron irradiation, post-irradiation annealing and re-irradiation on the Charpy V-notch impact transition temperature of pressure-vessel steels were investigated. Specimens representing several heats of pressure-vessel steels were irradiated at elevated temperatures to fast (> 1 MeV) neutron exposures up to 2 × 1020 nvt. The general observation was that irradiation caused an increase in the transition temperature; however, it was discovered that specimens representing various heats of a given material composition could show a vastly different increase in transition temperature due to irradiation. These results have led to the arbitrary classification of these steels as “sensitive” or “insensitive” heats. Possible correlation of heat to heat sensitivity with microstructure is discussed. Post-irradiation annealing in the temperature range of 650–800 F was found to reduce the effects of irradiation on the transition temperature significantly. However, subsequent re-irradiation of specimens that were post-irradiation annealed at 650 F increased the transition temperature to a level that could not be distinguished from that of specimens that were not annealed prior to re-irradiation. Re-irradiation studies were not conducted on specimens that were post-irradiation annealed at the higher temperatures. No explanation of the re-irradiation behavior after annealing is available.