Performance improvement of Classification of Steam Generator Tube Defects in Nuclear Power Plant Using Neural Network

신경회로망을 이용한 원전SG 세관 결함패턴 분류성능 향상기법

  • 조남훈 (숭실대 공대 전기공학부) ;
  • 한기원 (숭실대 공대 전기공학부) ;
  • 송성진 (성균관대 공대 기계공학부) ;
  • 이향범 (숭실대 공대 전기공학부)
  • Published : 2007.07.01

Abstract

In this paper, we study the classification of defects at steam generator tube in nuclear power plant using eddy current testing (ECT). We consider 4 defect patterns of SG tube: I-In type, I-Out type, V-In type, and V-Out type. Through numerical analysis program based on finite element modeling, 400 ECT signals are generated by varying width and depth of each defect type. In order to improve the classification performance, we propose new feature extraction technique. After extracting new features from the generated ECT signals, multi-layer perceptron is used to classify the defect patterns. Through the computer simulation study, it is shown that the proposed method achieves 100% classification success rate while the previous method yields 91% success rate.

Keywords

References

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