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T. Shikama1, S. J. Zinkle2,
JUPITER-TRIST-ER Group, S. Yamamoto3
1 Oarai Branch, Institute for Materials Research, Tohoku University,
Oarai, 311-1313 Japan
2 Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge,
TN 37831-6376 USA
3 ITER Joint Work Site, Garching near Munich, 85748 Germany
Abstract. Electrical properties of ceramic insulators of 12 different kinds of
highly pure aluminum oxide (
Al2O3) were examined in-situ in a High
Flux Isotope Reactor with radiation conditions relevant to those in fusion
reactors under development. Results indicate that some of the examined
aluminum oxide would withstand severe radiation and they can be used as
electrical insulators near burning plasma in fusion reactors under
development. In the meantime, some unique features in electrial features
were observed under irradiation. Examples are non-ohmic behavior, large
radiation induced electromotive force, and a large leakage current. They may
cause serious engineering problems in fusion reactors and further and
extensive works are anticipated especially under international
collaborations.
IAEA 2001
