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Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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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.
M. Goldsmith
Nuclear Science and Engineering | Volume 15 | Number 4 | April 1963 | Pages 382-387
Technical Paper | doi.org/10.13182/NSE63-A26454
Articles are hosted by Taylor and Francis Online.
A few-group method of calculating the epithermal flux in the vicinity of a slab absorber is developed. Non-moderating absorbers are treated in the P-1, P-3, and DP-1 approximations by applying blackness boundary conditions at the slab surfaces. A code which generates these coefficients is described. Comparison with Monte Carlo calculations indicates that six epithermal groups are needed to calculate the absorption rate to within 2% in a highly absorbing (optical depth = 10.6 at 0.025 ev) boron plate. An iterative method of treating moderating absorbers is also developed. Approximately three quarters of the error caused by neglect of moderation is removed after a single iteration.
