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1© Zetec Inc. All rights reserved
Utilizing Advanced Eddy Current Analysis Tools
34th Annual EPRI Steam Generator WorkshopJuly 20-22, 2015 – Portland, OR
Tom Bipes – Zetec
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• What are my inspection concerns today?• Manpower?• Complacency?• Unknown new flaw mechanisms?• Flaw growth/change I cannot detect?• Is it OK to not use technology that is available
today that answers these questions?
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Perspective
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Old Tools – data lookups
• Historic Perspective– Need to compare actual history data– Look up tubes manually– Data Segment Recall– What is change?– EPRI Guidelines on change
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Advanced Tools
• Recent Advances– Technology changes constantly
• Media – entire history on one device• Computers and networking• Software capabilities
– Automated Analysis with RevospECT®
– Historic Data Compare HDC®
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Manual Data Reviews
• Without HDC®
• Manual process for retrieving data– Time consuming– Data setup parameters differ– Interpretation of change subjective
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• Without HDC®
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History CurrentBaseline
Manual Data Reviews
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• With HDC®
– Automated process for retrieving data– Efficient process– Data setup parameters unified– Interpretation of change decisive– Delta Channel shows unique difference when
change occurs
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Manual Data Reviews
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• With HDC®
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Baseline
History
Current
Manual Data Reviews
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Automated Data Comparison
• With RevospECT™
– Compare current with two history datasets– Historic data interpolation– Delta Channel Difference
• Unique• Used as Detector Channel(s)• Independent or Leveraged Results• Defense in Depth – Highly Sensitive to new or immerging
conditions over time.
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Examples
Absolute channel compare for deposit loading on hot leg
1st ISI after replacement
14 years later
17 years
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Absolute LF channel compare for Sludge
1st ISI after replacement
14 years later
17 years (after aggressive sludge lancing performed)
Examples
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Examples
Baseline
False indication of buff mark or tube wear
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Field Indication Reported by HDC – Confirmed by X-Probe
Baseline
Current
History
Delta Change – Current to History
Examples
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Displayed with previous/current setup
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Previous Inspection Current Inspection
Examples
Change?
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Seabrook OE - NQI @ 01H+ (Years-1997;2009;2012)
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Baseline Delta History/Current History DeltaBaseline/Current
Examples
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Utilization
• PID (Positive Identification)– Typically performed prior to tube repair
• True Signal Change Review– Active/Masked Degradation– Sludge/Deposit growth– Benign indication stability
• Unique Detector for Auto Analysis– Signal Characteristics Change
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• Utilization per specific site design– Resolution/Review Process– Automated Analysis
• Separate Results from RevospECT analyzers• Integrate with RevospECT results• Leverage with bobbin and X-Probe results• Reduce manual reviews• Eliminate subjectivity
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Implementation
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• Utilized in various production modes– Resolution Process (Auto/Manual)– Review Process (Single Pass)– Independent Review (IQDA)
• Ensures determination of signal change• Reports change regardless of specific reporting
criteria (ETSS)
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Implementation Today!
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19© Zetec Inc. All rights reserved
Please visit the Zetec Suite for a Personal Demo!