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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
• 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?
2
Perspective
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
3
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®
4
Manual Data Reviews
• Without HDC®
• Manual process for retrieving data– Time consuming– Data setup parameters differ– Interpretation of change subjective
5
• Without HDC®
6
History CurrentBaseline
Manual Data Reviews
• 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
7
Manual Data Reviews
• With HDC®
8
Baseline
History
Current
Manual Data Reviews
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.
9
Examples
Absolute channel compare for deposit loading on hot leg
1st ISI after replacement
14 years later
17 years
Absolute LF channel compare for Sludge
1st ISI after replacement
14 years later
17 years (after aggressive sludge lancing performed)
Examples
Examples
Baseline
False indication of buff mark or tube wear
13
Field Indication Reported by HDC – Confirmed by X-Probe
Baseline
Current
History
Delta Change – Current to History
Examples
Displayed with previous/current setup
14
Previous Inspection Current Inspection
Examples
Change?
Seabrook OE - NQI @ 01H+ (Years-1997;2009;2012)
15
Baseline Delta History/Current History DeltaBaseline/Current
Examples
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
16
• 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
17
Implementation
• 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)
18
Implementation Today!
19© Zetec Inc. All rights reserved
Please visit the Zetec Suite for a Personal Demo!