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Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Yuri A. Tsidulko, Sinan Bilikmen, Serhat Cakir, Ehab Marji, Vladimir V. Mirnov, Gulay Oke
Fusion Science and Technology | Volume 35 | Number 1 | January 1999 | Pages 304-307
Poster Presentations | doi.org/10.13182/FST99-A11963872
Articles are hosted by Taylor and Francis Online.
Plasma axial-shear flow instability arises due to a variation in an equilibrium E × B rotation along the axial direction in which the magnetic field is aligned. The two fluid MHD equations for incompressible perturbation (taking into account the FLR effects) being treated in WKB approximation in transversal direction yield one scalar Klein-Gordon type equation with one-dimensional effective potential U(s) and effective mass m(s). Only axisymmetric, paraxial geometry is analyzed in order to separate the desired effects from the effects related to a variation in cross-sectional shape of the magnetic flux tube. In this work the effective potential was considered for a semi-infinite bounded plasma, first in the form of a square well for analytical study and then in a linear nature to study in the so called “tachion” region. Growth rates as a function of the potential well depth and other parameters were calculated. The cases where effective mass is real and imaginary “tachion” regime were considered. The results obtained are interesting for the stability problem of such open devices as GDT, GAMMA-10, AMBAL-M and the scrape-off layer in tokamak divertors.