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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.
K. Mishima, T. Hibiki
Nuclear Science and Engineering | Volume 124 | Number 2 | October 1996 | Pages 327-338
Technical Paper | doi.org/10.13182/NSE96-A28582
Articles are hosted by Taylor and Francis Online.
A quantitative method of image processing coupled with the neutron radiography technique is proposed to accurately measure the void fraction of a two-phase flow in a metallic duct. The spatial distribution of the dark current component is experimentally shown to be smooth, and the temporal variation cannot be ignored. Since the neutrons scattered in an object can be smoothed and reduced by setting the test section at a large distance from the converter, it is clarified that the corrections for the dark current and scattered neutrons can be represented by an offset. The offset value can be determined by using the total macroscopic cross section of the object (∑-scaling method). By comparing the calculated void fractions with the measured ones obtained by simulating the known void profile using a standard test section, the void fraction can be measured by this method within 2% error. The measurement error is estimated to be up to ∼10% when no correction for scattered neutrons is made or arbitrary offset values are used.