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H. Takase, I. Senda1, M. Araki,
T. Shoji, T. Tsunematsu
Naka Fusion Research Establishment, Japan Atomic Energy Research
Institute, 801-1 Mukouyama, Naka-machi, Naka-gun, Ibaraki-ken, 311-0193,
Japan
1 Permanent address: Toshiba Corporation, Tsurumi-ku, Yokohama, 230-0045,
Japan
Abstract. On a disruption with vertical displacement events (VDE), the
three-dimensional (3-D) electromagnetic transient characteristics of in-vessel
components in tokamak reactor have been studied numerically by using the
finite element method. In this study, the in-vessel components are treated as
the 3-D structure and the plasma halo region is modeled as the helical path of
halo current can be treated. As a result, it is shown that there is difference
in the electromagnetic stress of the divertor cassette between the current
with helical path and the current with only the poloidal path. This difference
is caused by the electromagnetic response of 3-D in-vessel components due to
the helical path of halo current. It is essentially important for the design
of tokamak reactors to treat the in-vessel components as the 3-D structure and
to consider the helical path of halo current.
IAEA 2001
