Eddy Current Standard Tube Development for the Foreign Material Detection and Identification J.A.PARK 1 , K.M.MIN 1 , H.H.KIM 1 , S.H.KWON 1 , J.I.KIM 2 1. Universal Monitoring & Inspection Inc. (www.umi.co.kr) 2. Korea Hydro & Nuclear Power Co. Ltd. (www.khnp.co.kr) 1
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Lissajous & Strip Chart of 304SS (Non-Ferro) Lissajous & Strip Chart of CS (Ferro)
Bobbin Diff MRPC Panc.
Bobbin Abs. MRPC +PT
Bobbin Diff MRPC Panc.
Bobbin Abs. MRPC +PT
REVIEW & RESULTS
Bobbin Diff MRPC Panc.
Bobbin Abs. MRPC +PT
Lissajous & Strip Chart of 430SS (Ferro)
Bobbin Diff MRPC Panc.
Bobbin Abs. MRPC +PT
Lissajous & Strip Chart of H-SLG (Ferro)
REVIEW & RESULTS
Bobbin Diff MRPC Panc.
Bobbin Abs. MRPC +PT
Lissajous & Strip Chart of S-SLG (Ferro)
CONCLUSIONS
1. For the proper monitoring and evaluation of the foreign materials contacted on the secondary side of the tubes, it is imperative to introduce LP standard tube.
2. LP materials are categorized as ferro/non-ferro and characteristic EC signal patterns were shown according to the LP properties.
3. Soft and hard sludge was properly fabricated and could be applicable for site sludge pile simulation
4. By applying EC LP STD tubes, the detectability, identification and contact geometry between tubes was clearly enhanced.
5. EC LP STD tubes has been successfully developed and customized for the site application.