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Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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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.
A. D’Angelo
Nuclear Science and Engineering | Volume 125 | Number 1 | January 1997 | Pages 93-100
Technical Paper | doi.org/10.13182/NSE97-A24257
Articles are hosted by Taylor and Francis Online.
The positive scram effect (PSE) during the first seconds of the Chernobyl accident following the activation of the scram command has been investigated by using the French CRONOS three-dimensional code under different hypotheses on the axial shape of the initial power distribution. Assuming an initial power shape similar to the information recorded by the SKALA monitoring system and relevant to the core condition -2 min before the reactivity accident, the results of the present work well confirm the first seconds of the simulation annexed to the INSAG-7 report. But, these results cannot explain the signals of too high power and too short period registered by all the lateral ionization chambers 3 s after the scram command activation. The present work shows that the PSE can reproduce those alarms under the hypothesis of a further power shape deformation in the lower part of the core.