ML17325B762

180 Day Steam Generator Tube Inspection Report for the 21St Refueling Outage for Waterford Steam Electric Station, Unit 3

ML17325B762
Person / Time
Site:	Waterford
Issue date:	11/21/2017
From:	Jarrell J Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
W3FI -2017-0044
Download: ML17325B762 (31)

Text

Entergy Operations, Inc.

I 7265 River Road Killona, LA 70057-3093 Ti Tel 504-739-6685 jjarrelentergy.com John P. Jarrell Manager, Regulatory Assurance Waterford 3 W3FI -2017-0044 November21, 2017 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

I 80 Day Steam Generator Tube Inspection Report for the 21 St Refueling Outage Waterford Steam Electric Station, Unit 3 (Waterford 3)

Docket No. 50-382 License No. NPF-38

Dear Sir or Madam:

Attached is the I 80 Day Steam Generator Tube Inspection Report for the 21 St Refueling Outage for Entergy Operations, Inc. Waterlord 3. This report is being submitted in accordance with Technical Specification 6.9. 1 .5 and provides the complete results of the Steam Generator Tube Inspection conducted during the 21st Refueling Outage.

This letter contains no new commitments.

If you have any questions or require additional information, please contact the Regulatory Assurance Manager, John P. Jarrell, at (504) 739-6685.

Attachments: Waterford 3 Steam Electric Station 180-Day Steam Generator Tube Inspection Report for the 215t Refueling Outage cc: Mr. Kriss Kennedy, Regional Administrator U.S. NRC, Region IV RidsRgn4MaiICenternrc.gov U.S. NRC Project Manager for Waterford 3 April. Pulvirentinrc.gov

W3F1-2017-0044 Page 2 U.S. NRC Senior Resident Inspector for Waterford 3 Frances.Ramirez@nrc.gov Chris.Speer@nrc.gov Louisiana Department of Environmental Quality Office of Environmental Compliance Surveillance Division Ji.Wiley@LA.gov American Nuclear Insurers Attn: Library Town Center Suite 300S 29th S. Main Street West Hartford, CT 06107-2445

Attachment to W3F1-2017-0044 Waterford 3 Steam Electric Station 180-Day Steam Generator Tube Inspection Report for the 21st Refueling Outage

Attachment to W3F1-2017-0044 Page 1 of 28 Waterford 3 Steam Electric Station (Waterford 3) 180-Day Steam Generator (SG) Tube Inspection Report for the 21st Refueling Outage (RF21)

During this period of reporting, Waterford 3 had one inspection. In April 2017, Entergy performed the second in-service inspections on the replacement steam generators. These generators were installed during the refuel outage eighteen (RF-18) and were placed in service in January 2013.

Waterford 3 (WF3) Technical Specification (TS) 6.9.1.5 requires Entergy Operations to submit a 180 day report to the NRC that outlines the details of the steam generator (SG) tubing inspections that were performed during the reporting period. The report shall include:

Technical Specification 6.9.1.5 A. The Scope of Inspections Performed on Each Steam Generator B. Degradation Mechanisms Found C. Nondestructive Examination Techniques Utilized for Each Degradation Mechanism D. Location, Orientation (if Linear), and Measured Sizes (If Available) of Service Induced Indications E. Number of Tubes Plugged During the Inspection Outage for Each Degradation Mechanism F. The Number and Percentage of Tubes Plugged to Date, and the Effective Plugging Percentage in Each Steam Generator G. The Results of Condition Monitoring, Including the Results of Tube Pulls and In-Situ Testing

Attachment to W3F1-2017-0044 Page 2 of 28 DESIGN The replacement steam generators for Waterford 3 are a Westinghouse Delta 110 design. The tube bundle consists of 8968 U-tubes fabricated from thermally treated Alloy 690. The tubing material complies with the requirements of ASME Section II SB-163, ASME Section III, NB-2000.

The nominal outside diameter (OD) of each U-tube is 0.75 in. The nominal tube wall is .044 inches thick for tube rows 1 and 2 and .043 inches thick for all other tube rows (rows 3 through 138). The ends of the tubes are expanded the full depth of the tubesheet and welded to the cladding on the tubesheet primary side.

The tubes are supported on the secondary side by eight (8) tube support plates.

The tube support plate material is stainless steel (ASME SA-240, Type 405). All tube support plates have trefoil-shaped holes arranged on a triangular pitch, produced by broaching, to reduce the potential for tube dry out and chemical concentration in the regions where the tubes pass through the tube support plates.

Five (5) sets of anti-vibration bars (AVBs) are installed to provide support for the U-bend region of the tube bundle. The anti-vibration bar assemblies stiffen the U-bend region of the tube bundle and facilitate proper tube spacing and tube alignment while mitigating tube vibration. The first set of anti-vibration bar assemblies are installed into the U-bend to a depth of, and including, row five (5). The second set of anti-vibration bar assemblies are installed into the U-bend to a depth of, and including, row eighteen (18). The third set of anti-vibration bar assemblies are installed into the U-bend to a depth of, and including, row thirty-four (34). The fourth set of anti-vibration bar assemblies are installed into the U-bend to a depth of, and including, row fifty-five (55). The fifth set of anti-vibration bar assemblies are installed into the U-bend to a depth of, and including, row eighty-four (84), except for one special bar that is inserted to row eighty-three (83). Each anti-vibration bar assembly consists of a V shaped, rectangular bar of stainless steel (ASME SA-479, Type 405) and two (2) end caps of thermally treated Alloy 690 (ASME SB-166, Alloy UNS N06690). Each end of each anti-vibration bar assembly is secured to the U-bend peripheral retaining rings of thermally treated Alloy 690 (ASME SB-166, Alloy UNS N06690) by welding the corresponding end cap with SFA-5.14 CL. ERNiCrFe-7 weld metal. Twenty (20) U-shaped retainer bars of chrome plated, thermally treated Alloy 690 (ASME SB-166, Alloy UNS N06690) are installed between several U-tubes. Both ends of the U-shaped retainer bar are welded with SFA-5.14 CL. ERNiCrFe-7 weld metal to the anti-vibration bar retaining ring of each anti-vibration bar set. These retainer bars provide support to the anti-vibration bar assemblies during seismic and postulated steam line break loading conditions.

Attachment to W3F1-2017-0044 Page 4 of 28 Table 1 Waterford 3 steam Generator Primary Inspection Plan SG Inspection Sequential Cycle Outage Year Cumulative Period Inspection Notes EFPM EFPM EFPM Period RF19 2014 14.6 14.6 N/A N/A First ISI No RF20 2015 17.1 31.7 17.1 First Inspection RF21 2017 15.8 47.5 32.9 First Inspect No RF22 2019 (est) 18.8 (est) 66.3 (est) 51.7 First Inspection No RF23 2020 (est) 18.4 (est) 84.7 (est) 70.1 First Inspection RF24 2022 (est) 18.0 (est) 102.7 (est) 88.1 First Inspect Waterford RSG Tubesheet Map Base Tubes Stayrods 140 130 120 110 100 90 80 Row 70 60 50 40 30 20 10 0

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 Column FIGURE 2 Waterford-3 Delta 110 Steam Generator Tubesheet

Attachment to W3F1-2017-0044 Page 5 of 28 A. The Scope of Inspections Performed on Each Steam Generator The RF21 inspection plan included:

100% 0.610 inch bobbin coil inspection full length; Rows 11 and above at 80 ips and 100% Rows 10 and below at 24 ips

+Pt inspection of hot and cold leg TTS (Top of Tube Sheet) +/- 3 inches for detection of PLPs (Potential Loose Parts) (periphery, tube lane, central tube void region)

+Pt special interest testing as necessary including:

Ø Any freespan bobbin I-code

Ø Any bobbin I-code at a TSP (Tube Support Plate) intersection

Ø Any AVB (Anti Vibration Bar) wear indication >15%TW based on bobbin coil analysis

Ø Possible loose parts/foreign object (PLP) signals including a 2-deep pattern of all immediately surrounding tubes until PLP signals are no longer reported (i.e.,

boxing)

Ø Freespan dings >5V (1)

Ø TSP dents >2V (2)

Ø Bulge (BLG) with preferential selection based on bobbin coil 600 kHz signal amplitude >18V

Ø Over-expansions (OXP) above the TTS Pancake coil RPC (Rotating Pancake Coil) special interest testing of bobbin PRX (Proximity) signals >1V Tube plug visual inspection Channel head bowl visual inspection per NSAL-12-1 including divider plate to channel head juncture (1)

SCC (Stress Corrosion Cracking) at freespan dings is judged non-relevant, similarly, freespan wear is judged non-relevant in the absence of foreign objects. The recommended +Pt inspection of >5V dings is performed to satisfy the full length testing requirement and to establish that foreign objects are not present.

(2)

As no industry qualification for the detection of wear in dented TSP intersections is available, the +Pt inspection of dented TSP intersections is performed to establish that no wear is present.

Attachment to W3F1-2017-0044 Page 6 of 28 Primary Bowl Examinations The hot leg and cold leg primary side channel heads in each SG were visually inspected during the RF21 outage. The inspections have been prompted by industry experience where exposure, and in some cases wastage, of the carbon steel channel head pressure boundary has occurred as result of a breach in the stainless steel cladding and/or in the divider plate-to-channel head cladding. The visual inspection results performed during RF21 did not identify any anomalies or degradation of the channel head cladding or associated welds.

The Secondary Side Inspection and FOSAR The inspection plan was developed to specifically address the areas of potential degradation due to recent industry inspection results. These included:

a. FOSAR of annulus region at the top of the tubesheet

b. Visual inspections of the upper steam drum and support structures

c. Visual inspection of the feed ring, spray nozzles and support structures.

Steam drum region inspections performed at RF21 were quite extensive and included:

Steam outlet nozzle venturis Mid-deck region Primary separator ID above swirl vanes Lower deck region Spray cans Feedring ID region Feedring structural supports Thermal sleeve to nozzle/pipe welds Sludge collector internals

Attachment to W3F1-2017-0044 Page 7 of 28 The upper steam drum region was inspected in both SG31 and SG32 during Waterford Unit 3 RF21. A total of four (4) foreign objects were identified during the steam drum inspections. The identified foreign objects were entered into Entergys Corrective Action Program with Condition Reports. All foreign objects identified during the steam drum inspections were removed from the SGs.

The objects identified included a piece of weld slag located in a secondary separator drain cup and a second smaller piece of weld slag located in a feedring spray nozzle of SG31. There were also two small machine curls identified on the outer surface of the feedwater ring in SG32. No structurally significant anomalies which could impact the integrity of the SG tubing were observed during inspection of the components in the upper steam drum regions of SG31 and SG32.

No foreign objects were identified during the FOSAR at the top of the tubesheet in either SG.

Visual inspection of the upper steam drum components identified no anomalies. As the moisture separation equipment is constructed using carbon steels with measurable chrome content or nickel-based alloys, erosion/corrosion of these components is not expected.

The W3 steam generator feedring utilizes a spray can design. The diameter of the holes in the spray cans is slightly less than the minimum tube-to-tube dimension in the pitch direction of 0.28 inch, and can effectively act as foreign material screens.

This design feature certainly caused one of the loose parts to remain captured in the feedring.

Attachment to W3F1-2017-0044 Page 8 of 28 B. Degradation Mechanisms Found At RF19 the first Service Induced degradation was identified as wear at the AVBs in both SG31 and SG32. There were four tubes preventatively plugged (PTP) in SG32 which enabled the Cycle 20 and 21 Operational Assessment to successfully analyze a 2 cycle Operating Interval.

At RF21, wear at the TSPs was detected as the second Service Induced degradation mechanism, in addition to wear at the AVBs, in both SG31 and SG32. These indications are provided in Table D-1 for SG31 AVBs, D-2 for SG31 TSPs, D-3 for SG32 AVBs and Table D-4 for SG32 TSPs. There were three (3) tubes plugged in SG31 and twenty four (24) tubes plugged in SG32 which enables the Operational Assessment to successfully analyze a 3 cycle Operating Interval.

Attachment to W3F1-2017-0044 Page 9 of 28 C. Nondestructive Examination Techniques Utilized for Each Degradation Mechanism Summary of SG Tube Degradation Mechanisms and Inspection Requirements: Detection Information: Waterford 3 RF21 EPRI Appendix Degradation Detection Inspection Expansion Location Probe Type Technique H or I Mechanism (1) Variable Sample Plan Plan Sheet Qualified Existing Degradation Mechanisms:

Wear (service AVBs 0.610 inch Bobbin ETSS 96004.1 Phase Yes 100% full length No Expansion (2) induced) 0.610 inch +Pt Phase Yes Indications 15% TW No Expansion (confirmation) ETSS 10908.4 by bobbin and any new indications Potential Degradation Mechanisms Wear (service TSPs 0.610 inch Bobbin ETSS 96004.1 Phase Yes 100% full length, both No Expansion (2) induced) (detection) SGs 0.610 inch +Pt ETSS 96910.1 Phase Yes 100% bobbin No Expansion (confirmation) indications Wear Dented AVB 0.610 inch +Pt ETSS 10908.4 Phase Yes 100% No Expansion and TSP >2V ETSS 96910.1 Volumetric Freespan 0.610 inch Bobbin ETSS I28413 Phase Yes 100% full length, both +Point boxing-in to Degradation (not SGs bound PLPs corrosion related) and 0.610 inch +Pt See Notes 3&4 Phase Yes Any bobbin I-code No expansion General Tube Signal (confirmation) freespan or at tube Identification supports Freespan dings 5V 0.610 inch +Pt ETSS 22401.1 Phase Yes 100% No expansion PLP Identification and TTS 0.610 inch +Pt See Notes 3&4 Phase Yes Sampling of peripheral +Point boxing-in to General Tube Signal (both legs) tubes, Hot and Cold bound PLPs and Identification Legs TTS +/- 3 inches indications Freespan, 0.610/0.600 inch ETSS I28413 Phase Yes (5) 100% full length, both No Expansion including Bobbin SGs U-bends Potential All 0.610 inch Bobbin ETSS 96010.1 Phase Yes 100% full length No Expansion Manufacturing Buff Marks 0.580 or 0.610 See Note 3 Phase Yes +Point MBIs No Expansion inch +Pt

Attachment to W3F1-2017-0044 Page 10 of 28 Notes for above Table:

(1): The Acquisition and Analysis Technique Sheets (ACTS and ANTS) detail the plant-specific guidelines for application of the EPRI ETSSs.

(2): ETSS 96004.1 will be applied for detection. Sizing will be performed according to ETSS 96041.1 for AVBs and ETSS 96043.1 for TSPs.

(3): ETSSs 20510, 20511, 21409, 21410, and I228425 are qualified for the detection of axial and circumferential ODSCC and PWSCC. The initial phase setup, initial span setting, and signal analysis methodology of each is consistent. Thus either of these techniques can be used for the resolution of extraneous bobbin indications. As these techniques are qualified for detection of SCC, sensitivity to volumetric degradation will be increased as volumetric degradation will produce larger signal amplitudes for equal depth compared to SCC indications. Analysts should be cautioned to adjust the span setting if a saturated condition is observed.

(4): Depth sizing of foreign object induced tube wear can be accomplished using any of the following ETSSs:

• ETSS 21998.1

• ETSS 27901.2

• ETSS 27902.2

• ETSS 27903.2

• ETSS 27904.2

• ETSS 27905.2

• ETSS 27906.2

• ETSS 27907.2 Each of these ETSSs use peak-to-peak amplitude for the depth sizing curve.

(5): While the various industry ETSSs for bobbin coil in freespan do not exclude small radius U-bends, practical application has been to utilize a supplemental probe (e.g. +POINT probe) for small radius U-bends. The W3 SG Row 1 bend tangent noise is less than Row 5 bend tangent noise in other Westinghouse SGs. Therefore the use of bobbin at a reduced pull speed for small radius U-bends at Waterford will provide an adequate inspection for general tube signal characterization.

Attachment to W3F1-2017-0044 Page 11 of 28 Summary of SG Tube Non-flaw Signal Disposition Categories Applicable Inspection: Waterford 3 RF21 EPRI Degradation Probe Detection Inspection Expansion Location Technique Mechanism Type & No. Variable Sample Plan Plan Sheet Resolution for Classification of Extraneous Indications Dings, Dents, PVN All 0.610 inch Bobbin Coil ETSS I28413 Phase 100% full length, Expansion both SGs according to 0.610/0.580 inch +Pt or ETSS 22401.1 Phase 100% Dings >5V, degradation Mag Bias +Pt for PVN ETSS 22841.1 100% Dents 2V, mechanism as needed PVN >1V confirmed Anomalous Tubesheet 0.610 inch 3-coil +Pt ETSS 20510.1 Phase BLG above TTS, Tubesheet Signals expansion joint ETSS 20511.1 DTI in tubesheet Tube-to-Tube U-bends 0.610 inch Bobbin Coil N/A, see Vertical maximum 100% full length, None Proximity Reference (A) voltage and phase both SGs 0.580 inch pancake coil N/A, see Vertical maximum Bobbin PRX >1V None Reference (A) voltage and phase Tube-to-AVB U-bends 0.580 inch pancake coil N/A, see Peak-to-Peak None Sampling may be Proximity (B) Reference (A) voltage performed based on inspection results Notes for above Table:

(A): LTR-SGMP-12-42, Revision 1, Waterford RSG Tube-to-Tube and Tube-to-AVB Proximity Testing Summary, July 2012 (B): This inspection is not planned for RF21 but may be applied in the event that diagnostic testing to examine AVB wear patterns is performed.

Attachment to W3F1-2017-0044 Page 12 of 28 D. Location, Orientation (If Linear), and Measured Sizes (if Available) of Service Induced Indications Table D SG31 Service Induced Indications - Wear at AVBs Table D SG31 Service Induced Indications - Wear at TSPs Table D SG32 Service Induced Indications - Wear at AVBs Table D SG32 Service Induced Indications - Wear at TSPs

Attachment to W3F1-2017-0044 Page 13 of 28 E. Number of Tubes Plugged During The Inspection Outage for Each Degradation Mechanism Table E-1 Tube Status SG-31 SG-32 Tubes in Original Steam Generators 8968 8968 Total Number of tubes previously removed from service 0 4 Repair Candidates from RF21:

Service Induced Wear at AVBs 1 24 Service Induced Wear at TSPs 2 0 Total Candidate Tubes Repaired 3 24 Total Repair SG-31 SG-32 Total Stabilizers Installed - RF21 0 0 Total Tubes Plugged - Post RF21 3 28 Total SG % Plugged - Post RF21 0.03% 0.31%

Attachment to W3F1-2017-0044 Page 14 of 28 F. The Number and Percentage of Tubes Plugged to Date, and the Effective Plugging Percentage in Each Steam Generator Table F-1 SG31 SG32 Cumulative Year Outage EFPY Total Plugs Plugs Plugging 2012 Pre-Service 0 0 0 0 0 2014 RF19 1.20 0 4 4 4 2017 RF21 4.0 3 24 27 27 Total Plugged to Date 3 28 31 Percent Plugged to Date 0.03% 0.31% 0.17%

Table F-1 Effective Plugging Percentage Generator # Plugged  % Plugged SG31 3 0.03%

SG32 28 0.31%

Attachment to W3F1-2017-0044 Page 15 of 28 G. The Results of Condition Monitoring, Including the Results of Tube Pulls and In-Situ Testing Waterford 3 did not perform any tube pulls or in-situ testing during the RF21 inspection.

Based on the Waterford 3 RF21 inspection results, no tubes contained indications which represented a challenge to structural or leakage integrity and all condition monitoring requirements are satisfied.

No primary to secondary leakage is predicted for the eddy current indications observed during the inspection in the event of a postulated SLB event.

Waterford 3 has a current Plant Specific Leakage limit of 0.375 gallons per minute for an accident-induced leakage limit. The predicted leakage is zero, thus the accident-induced leakage limit is met.

OVERALL CONCLUSIONS During the Waterford 3 second in-service steam generator tube inspection, no indications were found exceeding the structural integrity limits (i.e., burst integrity > 3 times normal operating primary to secondary pressure differential across SG tubes).

Therefore, no tubes were identified to contain eddy current indications that could potentially challenge the tube integrity requirements of NEI 97-06. Similarly, all operational assessment structural and leakage integrity requirements are satisfied. Based on the observed indications, the Waterford 3 SGs are expected to meet all structural and leakage integrity requirements at (End Of Cycle) EOC-24 when the third in-service inspection will be performed.

Attachment to W3F1-2017-0044 Page 16 of 28 Table D SG31 Service Induced Indications - Wear at AVBs SG ROW COL VOLTS  % LOCN INCH Comment 31 49 8 0.12 8 A09 -0.14 31 81 66 0.14 8 A04 -0.09 31 99 66 0.21 11 A07 -0.05 31 106 71 0.19 10 A07 -0.05 31 91 72 0.15 10 A08 -0.12 31 97 72 0.13 9 A06 0.00 31 64 73 0.15 9 A08 0.15 31 82 73 0.13 8 A07 0.10 31 57 74 0.14 9 A07 -0.38 31 99 74 0.21 11 A05 0.00 31 99 74 0.16 9 A08 -0.05 31 99 76 0.23 13 A08 0.09 31 83 78 0.48 20 A07 -0.08 31 114 79 0.44 17 A06 0.09 31 134 79 0.18 11 A08 -0.05 31 81 80 0.13 8 A07 -0.16 31 85 80 0.19 10 A05 0.00 31 95 80 0.16 10 A07 -0.14 31 105 80 0.33 17 A06 0.00 Plugged 31 105 80 0.09 7 A07 0.00 31 70 81 0.13 8 A07 -0.08 31 96 81 0.13 8 A05 0.00 31 96 81 0.12 7 A06 0.05 31 97 82 0.15 8 A04 0.05 31 97 82 0.21 11 A05 0.08 31 99 82 0.41 17 A06 -0.04 31 68 83 0.18 11 A07 0.07 31 78 83 0.17 10 A04 -0.15 31 92 83 0.26 13 A04 0.00 31 85 84 0.2 11 A08 -0.18 31 96 85 0.2 10 A07 -0.14 31 64 87 0.15 9 A03 -0.14 31 123 88 0.15 9 A06 -0.06 31 123 88 0.11 7 A08 -0.15 31 98 89 0.12 8 A06 0.00 31 99 90 0.16 9 A04 0.09 31 109 92 0.13 9 A05 -0.20 31 94 93 0.14 8 A07 0.03

Attachment to W3F1-2017-0044 Page 17 of 28 31 105 94 0.16 9 A06 -0.16 31 95 96 0.19 11 A08 0.00 31 82 153 0.1 7 A08 0.22 31 48 163 0.13 8 A08 -0.33 31 43 166 0.2 11 A08 0.21 Table D SG31 Service Induced Indications - Wear at TSPs SG ROW COL VOLTS  % LOC INCH Comment 31 4 1 0.31 7 06C 0.43 31 4 1 0.24 5 05C -0.64 31 4 1 0.2 4 04C 0.40 31 6 1 0.22 5 05C -0.48 31 6 1 0.15 3 04C -0.45 31 1 2 0.73 17 07C 0.00 31 1 2 0.19 4 05C -0.59 31 5 2 0.2 4 06C -0.67 31 5 2 0.18 4 05C 0.35 31 1 4 0.36 8 06C -0.56 31 1 4 0.53 12 05C 0.00 31 1 4 0.66 15 04C 0.00 31 4 5 0.13 3 06C -0.45 31 4 5 0.16 3 05C -0.64 31 4 5 0.19 4 04C -0.43 31 1 6 0.37 8 07C 0.00 31 1 6 0.91 21 05C 0.00 Plugged 31 1 6 0.34 8 04C 0.00 31 3 6 0.25 5 06C 0.43 31 3 6 0.18 4 04C -0.64 31 1 8 0.3 7 06C 0.30 31 4 11 0.18 4 06C 0.40 31 1 12 0.23 5 06C 0.40 31 6 13 0.17 4 05C 0.37 31 1 14 0.19 4 06C 0.38 31 3 14 0.27 6 06C 0.38 31 2 15 0.21 5 06C 0.43 31 80 17 0.22 5 05C -0.60 31 8 21 0.19 4 06C -0.53 31 4 25 0.37 8 06C 0.43 31 1 28 0.16 3 03C -0.51

Attachment to W3F1-2017-0044 Page 18 of 28 31 5 30 0.19 4 06C 0.40 31 2 31 0.28 6 06C -0.53 31 2 31 0.13 3 03C -0.48 31 7 34 0.26 6 06C 0.35 31 2 35 0.27 9 07C 0.00 31 2 35 0.36 8 06C 0.43 31 1 36 0.15 3 05C -0.61 31 1 44 0.14 3 03C -0.48 31 5 52 0.24 5 04C 0.30 31 6 53 0.23 5 04C 0.53 31 1 60 0.27 6 06C 0.32 31 1 62 0.18 4 05C -0.48 31 3 62 0.17 4 04C 0.40 31 4 63 0.27 6 06C -0.29 31 15 64 0.19 4 06C -0.66 31 136 67 0.22 5 05H -0.67 31 5 72 0.16 3 04C -0.62 31 6 75 0.29 6 07C 0.00 31 12 75 0.34 8 07C -0.63 31 12 75 0.28 6 06C 0.00 31 12 75 0.2 4 05C 0.00 31 136 91 0.36 8 05H -0.70 31 18 93 0.33 7 05C 0.43 31 138 99 0.24 5 05H -0.69 31 2 109 0.24 5 03C 0.48 31 2 109 0.12 2 02C -0.56 31 1 112 0.43 10 05C 0.19 31 1 112 0.43 14 04C 0.00 31 1 112 0.44 10 03C -0.16 31 2 113 0.19 6 06C -0.11 31 2 113 0.2 4 04C 0.00 31 2 113 0.16 5 03C -0.05 31 1 114 0.26 14 07C 0.00 31 1 114 0.51 29 06C 0.00 31 1 114 1.08 36 05C 0.46 Plugged 31 1 114 1.07 26 04C 0.00 31 1 114 0.44 17 03C 0.00 31 2 117 0.19 6 06C -0.08 31 6 127 0.23 5 05C 0.35 31 7 128 0.17 4 05C 0.40 31 8 129 0.22 5 05C 0.40

Attachment to W3F1-2017-0044 Page 19 of 28 31 4 133 0.28 6 04C 0.35 31 1 134 0.23 5 06C 0.00 31 9 134 0.18 4 06C -0.67 31 1 138 0.57 13 06C 0.38 31 1 138 0.21 5 05C 0.43 31 1 138 0.25 5 04C 0.51 31 6 139 0.2 4 06C 0.43 31 7 140 0.23 5 04C 0.40 31 1 142 0.19 4 04C 0.40 31 4 143 0.24 5 06C 0.40 31 1 164 0.35 8 06C 0.30 Table D SG32 Service Induced Indications - Wear at AVBs SG ROW COL VOLTS PER LOC INCH Comment 32 81 64 0.13 7 A07 0.00 32 99 68 0.33 13 A05 -0.05 32 99 68 0.18 9 A06 0.00 32 99 72 0.22 12 A04 0.00 32 76 73 0.14 9 A07 0.00 32 78 73 0.12 8 A07 0.00 32 92 73 0.11 7 A08 0.00 32 94 73 0.19 11 A04 0.00 32 98 73 0.14 9 A06 0.00 32 110 73 0.12 7 A08 0.00 32 81 74 0.29 13 A04 0.00 32 87 74 0.25 12 A05 0.00 32 99 74 0.19 9 A08 0.00 32 115 74 0.13 7 A08 0.11 32 78 75 0.14 7 A07 0.05 32 84 75 0.12 7 A05 0.00 32 86 75 0.28 13 A05 -0.12 32 98 75 0.18 9 A05 0.33 32 98 75 0.29 13 A06 0.02 32 110 75 0.14 7 A06 -0.07 32 110 75 0.26 12 A07 0.00 32 126 75 0.13 7 A07 0.00 32 126 75 0.24 11 A08 0.00 32 130 75 0.27 12 A05 0.00 32 95 76 0.11 7 A06 0.00

Attachment to W3F1-2017-0044 Page 20 of 28 32 97 76 0.28 14 A07 0.00 32 101 76 0.13 8 A06 0.00 32 101 76 0.65 23 A08 0.00 Plugged 32 121 76 0.16 10 A07 0.00 32 127 76 0.12 8 A05 0.00 32 76 77 0.1 7 A07 0.00 32 80 77 0.12 8 A07 0.00 32 80 77 0.14 8 A08 0.00 32 92 77 0.2 11 A05 0.00 32 92 77 0.27 14 A06 0.00 32 96 77 0.17 10 A04 0.00 32 98 77 0.17 10 A06 0.00 32 98 77 0.13 8 A07 0.00 32 104 77 0.22 12 A05 0.00 32 112 77 0.27 14 A06 0.00 32 99 78 0.14 8 A04 0.02 32 101 78 0.22 11 A05 0.00 32 103 78 0.88 25 A05 0.00 Plugged 32 105 78 0.19 10 A05 -0.02 32 107 78 0.41 16 A05 0.00 32 109 78 0.15 8 A05 0.00 32 113 78 0.54 19 A05 0.00 32 113 78 0.84 25 A06 0.00 Plugged 32 113 78 0.3 13 A07 0.00 32 82 79 0.17 8 A04 -0.06 32 92 79 0.18 9 A07 0.00 32 92 79 0.31 14 A08 0.00 32 94 79 0.19 10 A08 0.03 32 112 79 0.2 10 A07 0.07 32 112 79 0.25 11 A08 -0.10 32 114 79 0.41 16 A07 0.00 32 114 79 0.54 19 A08 -0.07 32 124 79 0.19 10 A05 0.00 32 126 79 0.31 14 A05 -0.05 32 130 79 0.22 11 A05 0.00 32 89 80 0.1 7 A04 0.00 32 91 80 0.2 11 A05 0.00 32 95 80 0.16 10 A05 0.00 32 97 80 0.1 7 A09 0.00 32 99 80 0.66 23 A05 0.39 Plugged 32 99 80 0.54 21 A06 0.24

Attachment to W3F1-2017-0044 Page 21 of 28 32 101 80 0.12 7 A05 0.00 32 105 80 0.19 11 A06 0.00 32 107 80 0.16 10 A05 0.00 32 109 80 0.15 9 A05 0.00 32 111 80 0.26 14 A05 0.00 32 115 80 0.24 13 A04 0.00 32 115 80 0.63 22 A05 0.00 Plugged 32 115 80 0.16 10 A06 0.00 32 115 80 0.29 14 A07 0.00 32 115 80 0.11 7 A08 0.00 32 117 80 0.24 13 A05 0.00 32 117 80 0.11 7 A06 0.00 32 117 80 0.67 23 A07 0.00 Plugged 32 123 80 0.13 8 A04 0.00 32 123 80 0.12 7 A05 0.00 32 123 80 0.13 8 A06 0.00 32 123 80 0.12 7 A08 0.00 32 127 80 0.14 9 A05 0.00 32 70 81 0.13 8 A07 0.00 32 86 81 0.18 10 A07 0.00 32 88 81 0.66 23 A05 0.00 Plugged 32 88 81 0.37 17 A06 0.00 32 94 81 0.16 9 A05 0.00 32 94 81 0.2 11 A07 0.00 32 98 81 0.28 14 A07 0.00 32 98 81 0.16 10 A08 0.00 32 104 81 0.15 9 A07 0.00 32 110 81 0.19 11 A08 0.00 32 112 81 0.33 15 A07 0.00 32 114 81 0.16 9 A05 0.00 32 114 81 0.24 13 A06 0.00 32 114 81 0.28 14 A08 0.00 32 118 81 0.12 8 A07 0.00 32 122 81 0.27 14 A07 0.00 32 124 81 0.14 8 A06 0.00 32 91 82 0.25 12 A07 0.10 32 93 82 0.32 14 A04 0.00 32 103 82 0.69 22 A08 -0.10 Plugged 32 103 82 0.33 14 A09 0.00 32 107 82 0.26 12 A07 0.12 32 113 82 0.13 7 A05 -0.02

Attachment to W3F1-2017-0044 Page 22 of 28 32 117 82 0.13 7 A06 -0.09 32 117 82 0.28 12 A08 0.00 32 127 82 0.37 15 A05 0.00 32 127 82 0.13 7 A06 -0.17 32 129 82 0.16 8 A05 0.00 32 129 82 0.66 22 A06 0.00 Plugged 32 129 82 0.19 9 A08 0.00 32 133 82 0.46 17 A06 -0.22 Plugged 32 84 83 0.15 8 A06 -0.50 32 88 83 0.17 8 A06 0.00 32 90 83 0.13 7 A07 -0.10 32 92 83 0.19 9 A07 -0.13 32 100 83 0.36 15 A06 0.07 32 102 83 0.15 8 A05 -0.12 32 102 83 0.15 8 A08 -0.15 32 104 83 0.12 7 A04 0.05 32 106 83 0.21 10 A07 -0.08 32 112 83 0.13 7 A04 0.19 32 112 83 0.7 22 A07 -0.18 Plugged 32 114 83 0.21 10 A05 -0.07 32 116 83 0.14 7 A06 0.10 32 116 83 0.32 14 A07 -0.10 32 120 83 0.14 7 A06 0.05 32 122 83 0.28 12 A06 -0.03 32 122 83 0.29 13 A07 -0.07 32 126 83 0.15 8 A04 0.00 32 126 83 0.19 10 A05 0.00 32 71 84 0.23 12 A03 -0.17 32 97 84 0.17 9 A04 0.02 32 99 84 0.15 9 A05 0.18 32 101 84 0.19 10 A07 0.15 32 103 84 0.32 15 A07 0.07 32 113 84 0.38 16 A05 0.00 32 115 84 0.42 17 A05 0.00 32 117 84 0.13 8 A05 0.00 32 117 84 0.13 8 A08 0.00 32 119 84 0.14 8 A05 0.00 32 121 84 0.16 9 A04 0.00 32 121 84 0.16 9 A05 0.00 32 121 84 0.75 24 A06 0.00 Plugged 32 121 84 0.26 13 A08 0.03

Attachment to W3F1-2017-0044 Page 23 of 28 32 123 84 0.15 8 A05 0.00 32 123 84 0.28 14 A06 0.00 32 123 84 0.29 14 A07 0.00 32 125 84 0.14 8 A05 0.00 32 125 84 0.22 12 A06 0.00 32 131 84 0.18 10 A06 0.00 32 82 85 0.14 8 A07 0.00 32 100 85 0.19 10 A07 -0.22 32 102 85 0.18 10 A04 0.00 32 108 85 0.56 20 A05 0.00 32 114 85 0.36 16 A08 0.00 32 118 85 0.35 16 A05 0.03 32 122 85 0.14 8 A07 0.00 32 122 85 0.15 8 A07 0.00 32 124 85 0.15 8 A08 0.00 32 73 86 0.12 7 A07 0.00 32 91 86 0.38 16 A06 0.00 32 93 86 0.2 10 A04 0.19 32 93 86 0.12 7 A06 -0.13 32 93 86 0.17 9 A10 0.00 32 97 86 0.15 8 A04 -0.11 32 97 86 0.36 15 A07 -0.17 32 99 86 0.13 7 A06 -0.26 32 99 86 0.29 13 A08 0.05 32 99 86 0.45 17 A09 0.00 32 99 86 0.16 8 A10 0.00 32 101 86 0.13 7 A06 -0.36 32 109 86 0.56 20 A04 0.05 32 123 86 0.39 16 A06 -0.03 32 123 86 0.2 10 A07 -0.05 32 125 86 0.16 9 A08 0.00 32 131 86 0.86 25 A05 0.00 Plugged 32 131 86 0.8 24 A06 0.00 32 131 86 0.16 8 A07 -0.10 32 131 86 0.14 8 A08 0.00 32 86 87 0.38 16 A07 0.10 32 102 87 0.14 8 A06 0.15 32 106 87 0.15 8 A06 0.15 32 108 87 0.15 8 A06 0.10 32 110 87 0.12 7 A05 0.00 32 112 87 0.21 10 A08 0.05

Attachment to W3F1-2017-0044 Page 24 of 28 32 114 87 0.32 14 A06 0.00 32 116 87 0.44 17 A05 0.03 32 116 87 0.31 14 A07 0.00 32 120 87 0.35 15 A05 0.00 32 122 87 0.17 9 A04 0.02 32 122 87 0.58 20 A05 0.00 32 122 87 0.91 26 A06 0.00 Plugged 32 124 87 0.38 15 A04 0.00 32 124 87 0.7 22 A05 0.06 Plugged 32 124 87 0.31 13 A06 -0.06 32 128 87 0.48 18 A05 0.00 32 128 87 0.3 13 A06 0.00 32 73 88 0.32 15 A07 -0.41 32 75 88 0.14 8 A07 0.18 32 79 88 0.13 8 A04 0.00 32 89 88 0.28 14 A05 0.15 32 93 88 0.25 12 A07 0.00 32 97 88 0.11 7 A05 -0.07 32 97 88 0.25 13 A06 0.00 32 99 88 0.23 12 A05 0.00 32 99 88 0.29 14 A06 0.00 32 101 88 0.29 14 A07 -0.24 32 107 88 0.18 10 A05 0.00 32 107 88 0.45 18 A06 0.00 32 107 88 0.11 7 A07 0.00 32 111 88 0.23 12 A04 0.00 32 111 88 0.25 12 A05 0.00 32 121 88 0.12 7 A05 0.00 32 123 88 0.13 8 A04 0.00 32 123 88 0.15 8 A05 0.00 32 123 88 0.47 19 A08 0.00 Plugged 32 127 88 0.11 7 A03 0.00 32 127 88 0.46 18 A07 0.00 32 127 88 0.16 9 A08 0.00 32 129 88 0.72 23 A05 0.06 32 129 88 2.58 40 A06 0.00 Plugged 32 129 88 0.37 16 A08 0.00 32 129 88 0.12 7 A09 0.00 32 74 89 0.14 8 A07 0.00 32 80 89 0.16 9 A07 0.00 32 82 89 0.17 10 A07 0.00

Attachment to W3F1-2017-0044 Page 25 of 28 32 86 89 0.2 11 A04 0.00 32 88 89 0.15 9 A07 0.00 32 90 89 0.28 14 A07 0.00 32 98 89 0.14 8 A06 0.00 32 98 89 0.14 8 A08 0.00 32 100 89 0.3 14 A07 0.00 32 108 89 0.51 19 A05 0.00 32 110 89 0.25 12 A05 0.00 32 110 89 0.15 8 A07 0.00 32 114 89 0.24 12 A04 0.00 32 114 89 0.16 9 A06 0.00 32 114 89 0.27 13 A08 0.00 32 114 89 0.46 18 A09 0.00 32 118 89 0.18 10 A02 0.00 32 120 89 0.16 9 A07 0.00 32 124 89 0.34 15 A05 0.00 32 87 90 0.32 14 A06 0.00 32 91 90 0.13 7 A06 0.00 32 97 90 0.28 13 A04 0.00 32 97 90 0.14 8 A05 0.00 32 97 90 0.29 13 A07 0.00 32 101 90 0.12 7 A04 0.00 32 103 90 0.28 13 A04 0.02 32 103 90 0.36 15 A07 0.00 32 109 90 0.2 10 A07 0.00 32 115 90 0.16 9 A05 0.00 32 117 90 0.26 12 A05 0.00 32 117 90 0.34 15 A08 0.00 32 119 90 0.31 14 A05 0.00 32 119 90 0.14 8 A06 0.05 32 121 90 0.16 9 A06 0.00 32 121 90 0.16 9 A08 0.00 32 131 90 0.47 18 A04 -0.09 32 131 90 0.74 23 A05 0.00 Plugged 32 131 90 0.21 10 A06 0.00 32 92 91 0.18 9 A04 0.00 32 92 91 0.33 14 A05 0.00 32 94 91 0.14 8 A07 0.00 32 104 91 0.55 20 A06 0.00 32 104 91 0.26 12 A07 0.00 32 120 91 0.29 13 A05 0.00

Attachment to W3F1-2017-0044 Page 26 of 28 32 120 91 0.14 7 A07 0.00 32 122 91 0.13 7 A06 0.00 32 124 91 0.17 9 A06 0.00 32 124 91 0.16 8 A07 0.00 32 126 91 0.22 11 A04 0.03 32 126 91 0.16 8 A05 0.03 32 128 91 0.17 9 A08 0.00 32 77 92 0.16 9 A08 0.08 32 87 92 0.13 8 A08 0.05 32 93 92 0.22 12 A07 0.00 32 95 92 0.19 10 A05 0.00 32 97 92 0.25 13 A05 0.00 32 97 92 0.21 11 A06 0.00 32 103 92 0.86 26 A05 0.00 Plugged 32 103 92 0.66 22 A06 0.00 32 111 92 0.11 7 A05 0.00 32 117 92 0.27 13 A04 0.00 32 117 92 0.26 13 A05 0.00 32 117 92 0.44 18 A07 0.00 Plugged 32 117 92 0.41 17 A08 0.00 32 117 92 0.15 9 A09 0.00 32 121 92 0.28 13 A05 0.00 32 121 92 1.41 32 A06 0.00 Plugged 32 121 92 0.53 20 A07 0.00 32 129 92 0.43 18 A05 0.00 Plugged 32 129 92 0.12 7 A06 0.00 32 129 92 0.31 14 A07 0.00 32 84 93 0.13 8 A07 0.10 32 96 93 0.16 9 A07 0.00 32 98 93 0.15 9 A07 0.00 32 100 93 0.22 12 A05 0.07 32 106 93 0.11 7 A04 0.00 32 108 93 0.16 9 A06 0.00 32 110 93 0.23 12 A07 0.00 32 114 93 0.15 9 A06 0.00 32 114 93 0.27 13 A07 -0.12 32 116 93 0.24 12 A06 0.00 32 120 93 0.11 7 A05 0.00 32 120 93 0.24 12 A07 0.00 32 124 93 0.21 11 A05 -0.07 32 124 93 0.25 13 A06 0.00

Attachment to W3F1-2017-0044 Page 27 of 28 32 93 94 0.18 9 A06 0.00 32 113 94 0.19 10 A06 0.00 32 121 94 0.12 7 A06 0.00 32 72 95 0.12 7 A07 0.00 32 74 95 0.17 9 A07 0.13 32 76 95 0.17 9 A07 0.13 32 82 95 0.28 13 A07 0.13 32 82 95 0.34 14 A08 0.03 32 98 95 0.15 8 A07 0.07 32 100 95 0.18 9 A05 0.00 32 100 95 0.22 11 A06 0.00 32 104 95 0.24 11 A05 0.00 32 112 95 0.66 22 A07 0.00 Plugged 32 114 95 0.12 7 A07 0.00 32 126 95 0.34 14 A06 0.00 32 81 96 0.15 8 A07 -0.14 32 87 96 0.12 7 A07 0.00 32 89 96 0.14 8 A07 0.00 32 93 96 0.16 9 A03 -0.17 32 93 96 0.35 15 A05 0.04 32 93 96 0.38 16 A06 0.00 32 82 97 0.16 9 A02 0.00 32 82 97 0.28 13 A03 0.06 32 126 97 0.15 9 A07 0.00 32 115 98 0.19 10 A05 0.00 32 115 98 0.55 20 A06 0.00 Plugged 32 115 98 0.15 8 A07 0.00 32 94 99 0.16 8 A08 -0.07 32 99 100 0.12 7 A06 0.00 32 128 111 0.28 13 A06 0.00 32 128 111 0.12 7 A07 0.00 32 35 166 0.14 8 A08 0.00 32 26 167 0.11 7 A09 0.20 32 30 167 0.11 7 A02 0.00 32 30 167 0.23 11 A09 0.15 32 38 167 0.11 7 A09 0.00

Attachment to W3F1-2017-0044 Page 28 of 28 Table D SG32 Service Induced Indications - Wear at TSPs SG ROW COL VOLTS  % LOC INCH Comment 32 15 2 0.24 5 06C 0.40 32 3 10 0.2 4 07C 0.27 32 1 18 0.16 3 04C 0.48 32 1 18 0.15 3 03C 0.43 32 6 23 0.22 5 05C -0.51 32 1 24 0.25 5 05C 0.05 32 1 24 0.28 9 03C 0.03 32 5 28 0.23 5 07C 0.35 32 8 33 0.32 7 05C -0.62 32 7 36 0.3 7 05C -0.65 32 5 48 0.36 8 05C -0.57 32 4 63 0.21 4 05C -0.62 32 6 95 0.17 4 03C -0.56 32 2 107 0.2 4 05C 0.40 32 2 117 0.23 5 06C -0.59 32 8 123 0.27 6 05C -0.62 32 7 130 0.14 3 05C 0.38 32 2 133 0.46 11 06C -0.62 32 1 134 0.18 4 05C 0.40 32 7 136 0.24 5 04C -0.59 32 2 137 0.24 5 05C 0.32 32 7 138 0.14 3 06C -0.57 32 7 138 0.22 5 05C -0.59 32 5 150 0.19 4 06C 0.32 32 2 161 0.12 2 06C -0.54 32 3 162 0.14 3 05C 0.35 32 3 168 0.2 4 05C 0.13 32 2 169 0.16 3 03C 0.35