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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.
L. Barleon, E. A. Fischer
Nuclear Science and Engineering | Volume 47 | Number 3 | March 1972 | Pages 247-261
Technical Paper | doi.org/10.13182/NSE72-A22412
Articles are hosted by Taylor and Francis Online.
The pile oscillator technique was used to measure the Doppler effect with heated small samples in neutron spectra typical of steam cooled fast reactors. Samples of UO2 in various enrichments, especially depleted UO2, were measured up to 1000°K, and also samples of PuO2 diluted with Al2O3. The results were analyzed by a method which properly accounts for the resonance interaction between the hot sample and the cold environment. The results with the UO2 samples where 238U gives the major contribution to the Doppler effect were in agreement with calculations within about 10%, though changes of the effect between different assemblies, in some cases, were not well reproduced. The experiments with PuO2 samples were designed to give integral information on alpha of 239Pu in the range 0.1 to 5 keV. It is shown that experiment and calculation agree within about 25% if high alpha values similar to those of Gwin are used.