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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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May 2024
Nuclear Technology
Fusion Science and Technology
Latest News
NRC updating GEIS rule for new nuclear technology
The Nuclear Regulatory Agency is issuing a proposed generic environmental impact statement (GEIS) for use in reviewing applications for new nuclear reactors.
In an April 17 memo, NRC secretary Carrie Safford wrote that the commission approved NRC staff’s recommendation to publish in the Federal Register a proposed rule amending 10 CFR Part 51, “Environmental Protection Regulations for Domestic Licensing and Related Regulatory Functions.”
M. Reich, A. Bock, M. Maraschek, ASDEX Upgrade Team
Fusion Science and Technology | Volume 61 | Number 4 | May 2012 | Pages 309-313
Technical Paper | doi.org/10.13182/FST11-392
Articles are hosted by Taylor and Francis Online.
For electron cyclotron current drive-based stabilization of neoclassical tearing modes (NTMs), it is crucial that the current deposition occurs as close to the island as possible; hence, its location needs to be accurately known. An NTM, rotating in the laboratory frame, causes fluctuations of magnetic flux measurable by Mirnov coils (dB/dt). Temperature perturbations in the vicinity of an NTM are caused by displaced flux surfaces and thus have the same frequency as the Mirnov signal but show a constant phase difference, which depends on the mode topology (poloidal and toroidal periodicity), on the toroidal displacement of the Mirnov coil with respect to the temperature measurement, and on the sign of the temperature change between the X-point profile and the O-point profile, which inverts somewhere inside the island. The sign flip of ΔTe is equivalent to a change of the phase difference between Te and magnetic reference by and therefore can be localized using the presented correlation method. Using the suggested algorithm, we can determine the rational surface that coincides with the radial island location with low latency and good reliability in real time from electron cyclotron emission temperature profiles when correlated with the appropriate magnetic fluctuations on a modern workstation computer.