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Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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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.
Farzad Rahnema, Piero Ravetto
Nuclear Science and Engineering | Volume 128 | Number 2 | February 1998 | Pages 209-223
Technical Paper | doi.org/10.13182/NSE98-A1952
Articles are hosted by Taylor and Francis Online.
It is shown that a perturbation in the external boundary of a system can be converted into (treated as) a perturbation in the boundary condition of the neutron balance equation. As a result, one may then use existing boundary condition perturbation or variational methods to estimate the change in the parameters of interest. The equivalent perturbation in the boundary condition is derived both in transport theory and its diffusion approximation for eigenvalue as well as fixed-source problems. Generalized boundary conditions in both diffusion and transport theory are considered. The existence of a solution to the problem with the equivalent boundary conditions that are nonstandard is investigated through analytic examples. The analysis is limited to first-order perturbation theory.