HTGR Knowledge Base

Conference Article: Preliminary study on application of eddy current testing as monitoring technique for graphite components in HTTR

Ishihara, M.; Iyoku, T. (Japan Atomic Energy Research Inst., Oarai, Ibaraki (Japan). Oarai Research Establishment)

Abstract

The ET, eddy current testing, is considered as the one of the major in-service inspection techniques for the graphite components in the HTTR, High Temperature Engineering Test Reactor. The preliminary study had been carried out in order to clarify the applicability of the ET to the in-service inspection of the graphite components. In the preliminary study, an analytical investigation was performed to estimate the allowable crack size in which the fracture mechanics approach was applied, and also an experimental investigation was performed to clarify the detectable crack size form the ET with artificial slit crack specimen. This paper treats the applicability of the ET to the graphite components as the in-service inspection technique on the basis of the analytical and experimental results.

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key words: Gas Cooled Reactor, Nuclear Technology
Reference:
Specialists meeting on graphite moderator lifecycle behaviour. Bath (United Kingdom). 24-27 Sep 1995.
International Atomic Energy Agency, Vienna (Austria)
IAEA-TECDOC--901, pp:287-298