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Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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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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.
Shiang-Huei Jiang
Nuclear Science and Engineering | Volume 75 | Number 1 | July 1980 | Pages 16-29
Technical Paper | doi.org/10.13182/NSE80-1
Articles are hosted by Taylor and Francis Online.
A one-dimensional gamma-ray transport code BIGGI 4T has been used to calculate gamma-ray attenuation in single layer and multiple layers of lead and water slabs from a plane monodirectional source. It has been found that boundary effect of finite medium is appreciable only in water within two mean-free-paths (mfp) of the boundary. Transmission buildup factors for multilayer slabs are not sensitive to the sequence of the alternate layers for the 3-MeV source. The conventional rule of thumb, that when the outermost layer exceeds 2 or 3 mfp, the buildup factor of the outermost material generally recommended, has been shown to be a bad approximation when based on the total number of mean-free-paths along the line of sight through all materials. Energy absorption buildup factor at the interface between layers was investigated in more detail. Transmission buildup factors obtained in the present study have been compared with those calculated by other empirical formulas. The applied range of various empirical formulas has been discussed. It has been found that semiempirical formulas devised by Kalos give data agreeing, in general and on the average, with the present results to within 5%.