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Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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Fusion Science and Technology
Latest News
ARPA-E announces $40 million to develop transmutation technologies for UNF
The Department of Energy’s Advanced Research Projects Agency–Energy (ARPA-E) announced $40 million in funding to develop cutting-edge technologies to enable the transmutation of used nuclear fuel into less-radioactive substances. According to ARPA-E, the new initiative addresses one of the agency’s core goals as outlined by Congress: to provide transformative solutions to improve the management, cleanup, and disposal of radioactive waste and spent nuclear fuel.
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.