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Fusion Science and Technology
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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.
T. Obiki, F. Sano, K. Kondo, H. Zushi, K. Hanatani, T. Mizuuchi, S. Besshou, H. Okada, K. Nagasaki, M. Wakatani, M. Nakasuga, Y. Nakamura, B.J. Peterson, C. Christou, Y. Ijiri, T. Senju, K. Yaguchi, S. Kobayashi, K. Toshi, K. Sakamoto, Y. Kurimoto, F. Funaba, A. Isayama, T. Hamada, Y. Suzuki, K. Kinoshita, H. Sugai, H. Toyota, K. Sasaki, M. Yamage, T. Saito, K. Walanabe, S. Sudo, N. Noda, K. Akaishi, M. Sato, S. Okamura, K. Ida, S. Hidekuma, M. Iima, S. Kado, K. Muraoka, K. Matsuo, H. Matsuura, T.S. Bigelow, M. Murakami, J.F. Lyon
Fusion Science and Technology | Volume 27 | Number 3 | April 1995 | Pages 85-90
Overview Paper | doi.org/10.13182/FST95-A11947050
Articles are hosted by Taylor and Francis Online.
Recent results of Heliotron E experiment are reviewed. Detailed studies of the plasma transport have been achieved in Heliotron E, in which the plasma wall interaction has been changed using the ECH boronization technique. The boronization realized low-density, high-Ti plasmas whose ion collisionality deeply extended to the I/v-regime. The local electron and ion thermal diffusivities in the NBI plasma are analyzed and discussed by comparison with theory-based transport models. The particle transport in ECH plasmas is investigated with edge fluctuation measurements. Both electrostatic and magnetic fluctuations are well correlated with the global particle confinement. Characteristic structures of the electric field or potential distribution are observed during the particle confinement degradation phase. It is considered that dc convective flow across the last closed flux surface is caused by the potential structure. Edge plasma flows have been discussed in connection with these studies and with asymmetric divertor heat/particle load.