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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.
Olaf Neubauer, Friedrich Hugo Bohn, Alexander Chudnovskij, Bert Giesen, Paul Hüttemann, Martin Lochter
Fusion Science and Technology | Volume 31 | Number 2 | March 1997 | Pages 154-158
Technical Paper | Magnet System | doi.org/10.13182/FST97-A30817
Articles are hosted by Taylor and Francis Online.
The results of the poloidal field (PF) coil efficiency measurements and the values for stray field compensation during premagnetization are presented. The results have been verified by field calculations and compared with plasma breakdown experiments. Determination of the vertical field in the plasma center produced by PF coils is essential for the definition of breakdown conditions and for the control of the horizontal plasma position and of the plasma shape in tokamaks. The electron beam technique has been chosen for the measurements, providing sufficient precision and visibility. Magnetic field lines became visible due to the effect of electron movement in a magnetic field and light emission in a gas. Vertical fields were determined from the measured toroidal field and vertical electron beam displacements. Precise determination of the values for the stray field compensation was achieved by detection of very low stray fields from the deflection of the electron beam.
