utilizing advanced eddy current analysis tools 34 th annual epri steam generator workshop 1 © zetec...

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?

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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

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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

• 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

• With HDC®

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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.

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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

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Field Indication Reported by HDC – Confirmed by X-Probe

Baseline

Current

History

Delta Change – Current to History

Examples

Displayed with previous/current setup

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Previous Inspection Current Inspection

Examples

Change?

Seabrook OE - NQI @ 01H+ (Years-1997;2009;2012)

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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

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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

• 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!

19© Zetec Inc. All rights reserved

Please visit the Zetec Suite for a Personal Demo!