Utilizing Advanced Eddy Current Analysis Tools 34 th Annual EPRI Steam Generator Workshop 1 © Zetec Inc. All rights reserved July 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 HistoryCurrentBaseline 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 1 st ISI after replacement 14 years later 17 years

Absolute LF channel compare for Sludge 1 st ISI after replacement 14 years later 17 years (after aggressive sludge lancing performed) 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 InspectionCurrent Inspection Examples

Seabrook OE - 01H+ (Years-1997;2009;2012) 15 Baseline Delta History/CurrentHistory Delta Baseline/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!

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