REGRESSION ANALYSIS OF PULSED EDDY CURRENT SIGNALS FOR INSPECTION OF STEAM GENERATOR TUBE SUPPORT STRUCTURES
39th Annual CNS-CNA Student Conference - 2015 June 01


Presented at:
39th Annual CNS-CNA Student Conference
2015 June 01
Location:
Toronto, Canada
Session Title:
Student Session

Authors:
J. Buck (Royal Military College of Canada)
P. R. Underhill (Royal Military College of Canada)
S. Mokros (Royal Military College of Canada)
J. Morelli (Queen's University)
T. Krause (Royal Military College of Canada)
V. Babber (Canadian Nuclear Laboratories)
B. Lepine (Canadian Nuclear Laboratories)
  

Abstract

Nuclear steam generator (SG) support structure degradation and fouling can result in damage to SG tubes and loss of SG efficiency. Conventional eddy current technology is extensively used to detect cracks, frets at supports and other flaws, but has limited capabilities in the presence of multiple degradation modes or fouling. Pulsed eddy current (PEC) combined with principal components analysis (PCA) and multiple linear regression models was examined for the inspection of support structure degradation and SG tube off-centering with the goal of extending results to include additional degradation modes.

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