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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.
V. Rajagopal
Nuclear Science and Engineering | Volume 12 | Number 2 | February 1962 | Pages 218-224
Technical Paper | doi.org/10.13182/NSE62-A26060
Articles are hosted by Taylor and Francis Online.
An experimental investigation has been made of the self-fluctuations in neutron density in a nuclear reactor, and the response in neutron density for random reactivity inputs, using analog correlation techniques. The analysis of self-fluctuations was based on ion chamber measurements of the fluctuations of neutron intensity at various points. Autocorrelation analysis was then used to find the power spectrum of the fluctuations, which has the shape of square modulus of transfer function. A random reactivity input was realized by using an electromechanical system to convert the white noise of a radioactive source into linear motion of a small neutron absorber. Analysis of the response was made by autocorrelating the reactivity input and cross-correlating the reactivity input and the response in neutron density, and determining their spectra. The amplitude and phase of the reactor transfer function were determined from these spectra. Results are presented on some measurements made on a small reactor at Brookhaven National Laboratory. The measured transfer function agrees with the calculated transfer function.