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Division Spotlight
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.
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.
Melvin M. Levine
Nuclear Science and Engineering | Volume 44 | Number 3 | June 1971 | Pages 372-375
Technical Paper | doi.org/10.13182/NSE71-A20167
Articles are hosted by Taylor and Francis Online.
A new method is presented for analyzing reaction rate measurements to obtain cross sections. In the usual approach, a complete forward or slowing down calculation is required for each beam energy at which the reaction rate is to be obtained. The approach here uses an adjoint formulation, yielding reaction rate vs energy in a single pass, making the analysis easier to perform and the physical process more transparent. The accuracy of the approximations involved in the present approach is tested in two cases by comparison with rigorous Monte Carlo results. For certain conditions of sample thickness and cross section as shown in this paper, the usual trial and error procedure for finding cross sections that fit the measured reaction rates can be avoided. It is then possible to invert the reaction rates directly into cross sections. A test case is described in which this direct inversion process proved to be stable and accurate.