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Vol.11 No.1previous AASP19(150-151-152-153-154-155)-AA156 NT93
Academic Articles
Regular Paper Vol.11 No.1 (2019) p.1 - p.7
 

Eddy Current Testing System for Heat Affected Zone of In-Core Monitor Housing Inner Surface

 

Noriyasu KOBAYASHI1,*, Fumikazu MORIKAWA2, Tomoki FUJITA3, Daisuke MATSUKAWA2, Takashi KASUYA2 and Kentaro TSUCHIHASHI3

 
1 Toshiba Energy Systems & Solutions Corporation, 8 Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa 235-8523, Japan
2 Toshiba Energy Systems & Solutions Corporation, 2-4 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
3 Toshiba Energy Systems & Solutions Corporation, 72-34 Horikawa-cho, Saiwai-ku, Kawasaki, Kanagawa 212-8585, Japan
 
Abstract
We verified that eddy current testing (ECT) has enough detectability for a welded part position of in-core monitor (ICM) housing outside and defects on a heat affected zone (HAZ) in welding of the inner surfaces for a special inspection involved in long-term operation. It is difficult to determine an appropriate inspection area if an actual welded position of an ICM housing is different from a designed position. It is presumed that detectability of ECT is decreased because a HAZ of an ICM housing inner surface is deformed by welding. We conducted a full-scale mock-up test using a simulated ICM housing specimen with a welded part and an ECT system which consisted of a welded part detection probe, a rotational ECT probe and probe moving equipment and confirmed that the ECT detected a welded part position of outside and defects of about 0.5 mm in depth despite existences of inner surface deformations of approximately 1 mm.
 
Keywords
Non-destructive inspection, Eddy current testing, Heat affected zone, In-core monitor housing, Nuclear reactor, Special inspection, Long-term operation
 
Full Paper: PDF EJAM Vol. 11 No. 1 pp.1-7 "Eddy Current Testing System for Heat Affected Zone of In-Core Monitor Housing Inner Surface"

Article Information
Article history:
Received 15 Oct. 2018
Accepted 24 May 2019