BYRON 2022-0072, Steam Generator Tube Inspection Report for Refueling Outage 23

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Steam Generator Tube Inspection Report for Refueling Outage 23
ML22300A049
Person / Time
Site: Byron Constellation icon.png
Issue date: 10/27/2022
From: Welt H
Constellation Energy Generation
To:
Office of Nuclear Reactor Regulation, Document Control Desk
References
BYRON 2022-0072, 1D.101
Download: ML22300A049 (1)
v • d • e


Text

Constellation Energy Generation, LLC (CEG)

.~<?ft Byron Station

~* Constellation. 4450 N. German Church Road Byron, IL 61010-9794 www.constellationenergy.com October 27, 2022 LTR: BYRON 2022-0072 File: 1D.101 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 Byron Nuclear Power Station, Unit 2 Facility Operating License No. NPF-66 NRC Docket No. STN 50-455

Subject:

Byron Station, Unit 2 Steam Generator Tube Inspection Report for Refueling Outage 23 In accordance with Technical Specification 5.6.9, "Steam Generator (SG) Tube Inspection Report," Exelon Generation Company, LLC is reporting the results of the SG inspections that were completed during Byron Station, Unit 2 Refueling Outage 23 (B2R23).

If there are any questions regarding this submittal, please contact Ms. Zoe Cox, Regulatory Assurance Manager, at (815) 406-2800.

Respectfully, f/-tc)~

Harris Welt Site Vice President Byron Station HW/CLF/JA/hh

Attachment:

1) Byron Station, Unit 2 Steam Generator Tube Inspection Report Refueling Outage 23, April 2022 cc: Regional Administrator, NRC Region Ill NRC Senior Resident Inspector - Byron Station Illinois Emergency Management Agency - Division of Nuclear Safety

Constellation Energy Generation Company, LLC BYRON STATION UNIT 2 4450 North German Church Road Byron, Illinois 61010 COMMERCIAL OPERATION: August 21, 1987 BYRON STATION UNIT 2 STEAM GENERATOR TUBE INSPECTION REPORT REFUELING OUTAGE 23 April 2022 Mailing Address 4300 Winfield Road Warrenville, IL 60555 Page 1 of 29

TABLE OF CONTENTS Introduction ............................................................................................. 3 Steam Generator Inspection Scope (TS 5.6.9.a) ............................................. 3 Degradation Mechanisms Found (TS 5.6.9.b) .................................................. 5 Nondestructive Examination Techniques Utilized for Each Degradation Mechanism Found During B2R23 (TS 5.6.9.c) ................................................ 6 Location, Orientation (if linear), and Measured Sizes of Service Induced Indications (TS 5.6.9.d) ............................................................................ 7 Plugging Summary (TS 5.6.9.e and TS 5.6.9.f) ............................................... 11 Results of Condition Monitoring (TS 5.6.9.g) .................................................. 12 Primary to Secondary Leakage Assessment (TS 5.6.9.h and TS 5.6.9.i) .............. 13 Results of Monitoring for Tube Axial Displacement (Slippage) (TS 5.6.9.j) ........... 13 Attachment A- Westinghouse Model D-5 Tube Support Configuration ................ 14 Attachment B - Anti-Vibration Bar Wear Indications ......................................... 15 Page 2 of 29

Introduction Byron Station, Unit 2 operates with four (4) Westinghouse Model D-5 recirculating steam generators (SGs) in the four-loop pressurized water reactor system. Each SG contains 4570 thermally treated Alloy-600 U-tubes that have a nominal outside diameter of 0.750 inches and a nominal thickness of 0.043 inches. The tubes are hydraulically expanded into the full depth of the tubesheet. The tubes are supported by stainless steel quatrefoil support plates (TSPs) and chrome plated Alloy-600 anti-vibration bars (AVBs). The tube support plates within the pre-heater region are 0. 75" thick stainless steel drilled hole baffle plates. The lowest tube support plate (TSP 01) on the hot and cold leg sides is a flow distribution baffle that is also stainless steel of 0. 75" thick with enlarged drilled tube holes to distribute the feed flow. See Attachment A, for a diagram of the D-5 SG tube support plate (TSP) and AVB Configuration.

Technical Specification (TS) 5.5.9.d provides the requirements for SG inspection frequencies and requires periodic SG tube inspections to be performed. TS 5.5.9.d requires that 100% of the Unit 2 tubes are to be inspected at sequential periods of 120, 96, and thereafter 72 effective full power months (EFPM). The first sequential period shall be considered to begin after the first inservice inspection of the SGs.

At the start of B2R23, the Byron Unit 2 SGs had accumulated a total of 31.4 EFPY, and 30.2 EFPY (362.7 EFPM) since the first inservice inspection (ISi) during B2R01.

Therefore, Unit-2 was at 2. 7 EFPM of the 72 EFPM period (the fifth sequential inspection period) making B2R23 the first outage and first SG inspection in the four (4) outage inspection period.

The B2R23 SG inspections were performed consistent with the Electric Power Research Institute (EPRI) "PWR Steam Generator Examination Guidelines: Revision 8," applicable interim guidance and Nuclear Energy Institute (NEI) 97-06, "Steam Generator Program Guidelines" Revision 3. The field inspection activities were conducted from April 21, 2022 through April 30, 2022 by the Westinghouse Electric Company LLC.

Steam Generator Inspection Scope (TS 5.6.9.a)

Byron Unit 2 Refueling Outage 23 (B2R23) was the first refueling outage of the third 72 EFPM period, the next SG inspection is planned for B2R25 however, Byron is planning to adopt TSTF-577 which would defer the next SG inspection until B2R26 or B2R27. The following inspections were performed during B2R23 to ensure that 100% of the tubes will be inspected during the period as required by TS 5.5.9.d and also to meet the requirements of TSTF-577.

Eddy Current Scope:

Bobbin and Array( 1J Probe Inspections

  • 100% full length examination of all in-service tubes in all four (4) SGs.

Tubes in Rows 1 and 2 were inspected from tube end to TSP 11 H/11 C. The U-bend portions were inspected as part of the Row 1 and Row 2 +POINT' probe program.

  • Examined the hot leg and cold leg tubesheet region for tube slippage.

Page 3 of 29

MRPC/+Point Probe Inspections

  • 100% Row 1 and Row 2 U-bend region from TSP 11 H to 11 C
  • 100% Dents/Dings >5.0 volts located in the hot leg, cold leg and U-bend.
  • All bobbin coil "I-code" indications that are not resolved after history review.
  • Existing and new TSP wear indications based on bobbin inspection.
  • All PLP signals, foreign objects and foreign object wear left in service from the previous inspection as specified in the Degradation Assessment.
  • All hot leg, cold leg, and U-bend dent/ding locations _:::2.0 volts and locations of tube wear in all in-service tubes potentially containing high residual stress.
  • Inspection of the following "benign" signal codes:

BLG/OXP located outside the tubesheet or TSP Note (1): The 100% full length Array probe 82R23 examination encompassed all prior partial length Array probe examinations. These included peripheral tubes, HL/CL intersections at potentially high residual stress tubes, expansion transitions at the tubesheet, BLG/OXP located outside the tubesheet orTSP Other SG Inspections:

Visual Inspection of Installed Tube Plugs - All previously installed tube plugs were visually inspected for signs of degradation and leakage. In addition, all plugs installed during B2R23 were also visually inspected, and the installation parameters were reviewed for acceptable installation.

SG Channel Head Bowl Visual Inspections- Each SG primary channel head was visually examined in accordance with the recommendations of Westinghouse NSAL 12-01 and NRC IN 2013-20 for evidence of breaches in the cladding or cracking in the divider to channel head weld and for evidence of wastage or cracking of the carbon steel channel head.

Secondary Side Visual Inspections -A full foreign object search and retrieval (FOSAR) of the pre-heater baffle plate TSP 02C was performed in SG 2A & 2D preheater high flow regions on the pre-heater tube support baffle plate TSP 02C.

The waterbox, rib and cap plate regions of SG 2A, 2C and 2D were also inspected for degradation.

During B2R23, SG 2A and 28 primary and secondary side moisture separator regions were visual inspected along with obtaining ultrasonic thickness measurements on the secondary side moisture separator.

Sludge Lancing - SG secondary side TTS sludge lancing was performed in all 4 SGs during 82R23.

Page 4 of 29

Degradation Mechanisms Found (TS 5.6.9.b)

The Table below provides a summary of all the degradation, by mechanism, identified during the 82R23 inspections (all mechanisms were present during previous inspections). No evidence of any cracking was found.

summary of B2R23 Degra daf10n Ind"1cafions b,y Mec hamsm Degradation Mechanism SG2A SG28 SG2C SG2D Total AVB Wear 268 429 317 198 1212 TSP Wear 0 7 1 16 24 New Secondary Side FO 4 0 1 1 6 Wear Historical Secondary Side FO 7 12 4 5 28 Wear Remaining In Service Other Results:

Visual Inspection of Installed Tube Plugs - No degradation or anomalies were found.

SG Channel Head Bowl Visual Inspections - No evidence of cladding or weld breaches, channel head wastage or cracking was identified.

Secondary Side Visual Inspections - A visual inspection of the 2A, 2C, and 2D SG waterbox and cap plate regions were performed during 82R23. It was observed that the waterbox cap plate vent holes are rounded indicating minor erosion in both SGs, however, the condition is similar to previous inspections. The rounding of the cap plate vent holes is judged to pose no operational or structural concerns. The function of the cap plate vent holes is to provide venting of air during the filling of a SG. No other anomalies were identified in SG's 2A and 2D. During a prior refueling outage at Byron Unit 2 (82R20), a visual inspection of the preheater region of SG 2C found a loose part (backing bar) that was subsequently determined to have been generated from the steam generator's waterbox where the feedwater enters the steam generator. The waterbox of SG 2C was inspected during 82R23, all the remaining backing bars were found to be present and intact.

A visual inspection of the 2A and 2D SG preheater regions where the feedwater enters the SG were performed during 82R23. All four (4) fit-up blocks under TSP 03C were found intact in the 2A and 2D SGs inspected. The waterbox vertical rib plates and target plate in both SGs inspected were found to be in acceptable condition with no indication of degradation, erosion or other anomalies.

Inspection results for the SG 2A and SG 28 primary moisture separators in the steam drum still show signs Flow Accelerated Corrosion (FAC)/erosion wear and that it is, in general, progressing slowly with a 95 th percentile upper bound wear rate of 0.020 in. /cycle. The minimum component thickness on SG 2A was on a riser barrel, which had an ultrasonic thickness measurement of 0.093 inches compared to the nominal component thickness of 0.25 inches. The minimum component thickness on SG 28 was on a tangential nozzle, which had an Page 5 of 29

ultrasonic thickness measurement of 0.092 inches compared to the nominal component thickness of 0.25 inches. No repairs were required in B2R23, and it was concluded that operation for at least 2 and up to 4 cycles until repair and/or the next scheduled inspection is justified with no adverse consequences for the moisture separators in all 4 SGs.

Nondestructive Examination Techniques Utilized for Each Degradation Mechanism Found During 82R23 (TS 5.6.9.c)

All SG eddy current examination techniques used for sizing degradation (see Table below) were qualified in accordance with Appendix H or I of the EPRI PWR SG Examination Guidelines Revision 8. Each examination technique was evaluated to be applicable to the tubing and the degradation mechanisms found in the Byron Station Unit 2 SGs during B2R23.

NOE Detection Techniques Utilized Detection Detection Technique ETSS( 1) Degradation Location Probe Type Mechanism Existing Degradation Mechanisms Bobbin 96041.1 (Rev 6) (App. I) Wear AVB Supports Array 17908.1 /.4 (Rev 1) (App. I)

Bobbin 96042.1(Rev. 4) (App. I) Wear FOB/ Baffle Pates Array 17908.1 /.4 (Rev 1) (App. I) (Drilled Hole)

Bobbin 96004.1 (Rev 13) Wear Quatrefoil TSPs Array 11956.3/.4 (Rev 3) (App. I) (broach)

Bobbin 27091.2 (Rev 2) Wear due to Foreign Top of Tubesheet and Array 17901.1/.3 through 17906.1/.3 Objects Sludge Pile Tube (Rev 0) Support Plates Array 20400.1 (Rev 5) and Freespan Array 20402.1 (Rev 5)

Array 20403.1 (Rev 5)

Potential Degradation Mechanisms Array 20501.1 (Rev 4) -Axial Array 20500.1 (Rev 4) - Gire. PWSGG, Axial/Gire. Expansion Region to

+POINT 11524.1 (Rev 0) - Gire. (App. I) TTS-14.01" Array 20501.1 (Rev 4) -Axial PWSGG, Axial/Gire. Expansion Region to Array 20500.1 (Rev 4) - Gire. (BLG/OXP) TTS-14.01"

+POINT 96511.2 (Rev 16) -Axial/Gire. PWSGG, Axial/Gire. Row 1/Row 2 U-Bend Array 23513.1 (Rev 3) - Axial/Gire. Low Row U-bend Array OD: Top of Tubesheet 20402.1 (Rev 5) - Axial ODSGG/PWSGG Expansion Transition 20400.1 (Rev 5) - Gire. Axial/Gire. and ID: Pre-heater Baffle Plate 20501.1 (Rev 4) - Axial Expansion Transitions 20500.1 (Rev 4) - Gire. (TSP 02G/03G)

Bobbin 28413 (Rev 5) - Axial (App. I)

+POINT 28424 (Rev 4) -Axial (App. I)

+POINT 21410.1 (Rev 6)- Gire. ODSGG, Axial/Gire. Sludge Pile Array 20402.1 (Rev 5) - Axial Array 20403.1 (Rev 5) -Axial Array 20400.1-Girc Page 6 of 29

Bobbin 128413 (broach/freespan) Tube Support Plates, 128411 (drilled) FOB/Baffle Plates, Freespan, High Row U-

+POINT 128424 (drilled) ODSCC, Axial Bend 128425 (broach and freespan) (Rows 10 and higher)

Array 20402.1 Array 10413.2 - Axial ODSCC, Axial Low Row U-bends, Rows 3-5 Bobbin 10013.1 (Dents) -Axial Dents/Dings <5v 24013.1 (Dings) - Axial

+POINT 22401.1 (Dents/Dings) -Axial ODSCC, Axial/Gire. Dents/Dings >5v 21410.1 (Dents/Dings)-Circ. Baffle Plate Dents 2-5v Dings below Baffle Plates 2-5v Bobbin 96005.2 Pitting, Volumetric Top of tubesheet, Array 24998.1 Indications Freespan Note: (1) ETSS - Examination Technique Specification Sheet NDE Sizing Techniques Utilized EPRI Detection ETSS Degradation Technique Location Applicability Probe Rev. Mechanism ETSS Volumetric

+Point' 21998.1 4 Foreign Object Wear Locations Wear Wear at AVBs( 1l Bobbin 96004.3 13 Structure Wear at TSPs( 1l (Quatrefoil and Drilled Hole

+Point' 96910.1 11 Structure Baffle)

Note: (1) TSP - Tube Support Plate AVB - Anti-Vibration Bar Location, Orientation (if linear), and Measured Sizes of Service Induced Indications (TS 5.6.9.d)

  • Anti-Vibration Bar (AVB) Wear - Tube degradation was found during bobbin coil examination in the U-Bend region due to fretting of the AVB on the outer surface of the tube. A total of 1212 indications were reported. After 3 operating cycles eleven ( 11) tubes in the 4 SGs had indications of AVB wear meeting or exceeding the 40% TW plugging limit and were removed from service by mechanical tube plugging. The largest AVB wear indication found during B2R23 was measured at 50% through-wall (TW). The Table below provides a summary of AVB wear degradation. Refer to Attachment B for detailed locations and sizing for all AVB wear indications.

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82R23 AVB Wear Summary SG2A SG2B SG2C SG2D

  1. of Ind. # of Ind. # of Ind. # of Ind.

10-39% TW 263 427 314 197

>=40% TW 5 2 3 1 TOTAL 268 429 317 198

  • Mechanical Wear at Tube Support Plates (TSPs) - Tube degradation attributed to wear in the quatrefoil (broached) TSPs and in the pre-heater TSPs, which are drilled support baffle plates, was identified. A total of 24 indications in 16 support plate structures were identified as wear during B2R23. Within this population, 14 pre-existing TSP wears were identified in the 28, 2C, and 2D SGs and 10 newly identified TSP wears were found in 4 tubes in 2D SG. The depth of the TSP wear ranged from 11 % TW to 32% TW. The table below provides a summary of the tubes that contain indications of pre-heater or quatrefoil TSP wear as identified during B2R23.

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Byron 82R23 TSP Wear Indication Summary and Depth Profiling Results 82R23 Depth Profiling Wear Max Total SG Row Col Loe Inch SED SEL Wear Type 3/4TW Depth Length

(%) (in.) Character 3/4TW (in.)

2B 15 91 06C 0.58 Baffle 11 11 0.62 9.18 0.446 Flat 07C-#1 1.09 Quatrefoil 21 23 1.26 20.91 0.731 Flat 2B 46 50 07C-#2 0.8 Quatrefoil 15 15 0.75 12.92 0.352 Tapered 2B 47 54 07C 1.01 Quatrefoil 22 23 1.21 21.91 0.865 Tapered 2B 47 75 02C 0.19 Baffle 12 12 0.3 10.06 0.255 Flat 2B 49 64 07C 0.95 Quatrefoil 12 14 0.99 12.73 0.752 Flat 2B 49 73 07C 0.66 Quatrefoil 15 15 0.64 12.03 0.499 Tapered 2C 48 63 07C -0.38 Quatrefoil 25 29 1.01 25.14 0.454 Tapered 08C-#1 0.27 Quatrefoil 21 21 1.14 17.87 0.701 Tapered 2D 48 51 08C-#2 (1) Quatrefoil (1) 15 0.67 12.39 0.345 Tapered 08C-#3 ( 1) Quatrefoil ( 1) 11 0.41 9.67 0.238 Tapered 05C -0.02 Baffle 17 17 0.41 14.68 0.234 Tapered 2D 48 63 07C 0.20 Quatrefoil 19 23 1.13 19.58 0.531 Tapered 08C 0.33 Quatrefoil 32 32 1.14 27.83 0.488 Tapered 08C-#1 0.35 Quatrefoil 21 21 0.98 19.86 0.392 Tapered 2D 49 62 08C-#2 ( 1) Quatrefoil (1) 16 0.87 14.04 0.378 Tapered 07C-#1 -0.48 Quatrefoil 18 19 1.03 16.39 0.494 Tapered 2D 49 63 07C-#2 -0.45 Quatrefoil 26 26 1.03 20.53 0.51 Tapered 07C-#3 0.47 Quatrefoil 19 25 1.03 20.87 0.448 Tapered 07C-#1 -0.40 Quatrefoil 22 27 1.11 23.69 0.549 Tapered 07C-#2 (1) Quatrefoil ( 1) 13 0.72 10.83 0.41 Tapered 2D 49 64 08C-#1 0.35 Quatrefoil 16 16 0.84 14.64 0.277 Tapered 08C-#2 ( 1) Quatrefoil ( 1) 13 0.83 10.89 0.714 Flat 2D 49 70 05C -0.15 Baffle 15 15 0.49 12.04 0.321 Tapered Note:

(1) Five (5) additional quatrefoil TSP wear indications were identified during depth profiling and were located at the same elevation as an existing indication but at another quatrefoil land.

  • Foreign Object Wear - A total of 34 indications of FO wear were identified during 82R23. Twenty-eight (28) of the indications were historical and the remaining six (6) were newly reported during 82R23. The indications ranged from 9% TW to 37% TW. The historical FO wear shows no significant change in eddy current signal response. All FO associated with the historical wear indications were removed in a prior outage.
  • All six (6) tubes with new wear had an FO still present, i.e., an associated PLP signal from eddy current. While the depths of the indications did not meet or exceed the 40% TW tube plugging limit, these tubes were preventatively plugged due to the FO that caused the wear is still present and could cause continued Page 9 of 29

tube wear. The table below lists the data record for the eddy current signals corresponding to foreign object wear indications detected during 82R23.

Byron 82R23 Foreign Object Wear Indication Summary and Sizing Results TSP Depth Axial Circ SG Row Col lnch1 Length Extent New/ FO Location (3/4TW) Legacy Present (inch) (degrees) 2A 5 88 06C 0.49 28 0.25 66 New Yes 2A 8 76 07H -0.95 20 0.14 37 Legacy No 2A 20 65 08H -1.56 34 0.21 62 New Yes 2A 21 66 07H 41.88 22 0.19 52 New Yes 2A 28 56 07H -0.73 13 0.16 32 Legacy No 2A 30 50 03H -0.69 23 0.11 29 Legacy No 2A 39 50 02C 2.33 14 0.11 31 Legacy No New Yes (in 2A 41 53 07H -0.79 19 0.14 29 Adj.

Tube) 2A 45 67 02C 1.2 18 0.2 62 Legacy No 2A 45 67 02C 3.02 21 0.11 35 Legacy No 2A 47 67 02C 0.42 25 0.34 62 Legacy No 2B 1 54 02C -0.28 26 0.29 25 Legacy No 2B 14 4 05H 0.89 9 0.27 65 Legacy No 2B 17 48 05H 34.71 25 0.26 54 Legacy No 2B 27 74 05H -0.92 16 0.27 63 Legacy No 2B 29 25 01H 0.62 9 0.27 63 Legacy No 2B 29 26 01H 0.67 18 0.3 60 Legacy No 2B 35 15 07H -0.97 14 0.19 46 Legacy No 2B 37 74 07H -1.05 19 0.19 46 Legacy No 2B 38 35 05H -0.88 11 0.11 46 Legacy No 2B 38 35 05H -0.49 25 0.13 52 Legacy No 2B 38 66 02C 1.44 21 0.51 43 Legacy No 2B 39 66 02C 0.82 10 0.21 31 Legacy No 2C 6 48 05H -0.85 20 0.27 66 Legacy No 2C 13 58 07H -0.83 26 0.27 71 New Yes 2C 16 18 01H 0.59 22 0.16 28 Legacy No 2C 17 18 01H 0.68 15 0.16 26 Legacy No 2C 48 35 02C 0.5 31 0.3 71 Legacy No 2D 6 44 08H -0.54 34 0.19 31 Legacy No 2D 9 76 07H -0.83 18 0.26 58 Legacy No 2D 24 47 05H -0.78 30 0.25 58 Legacy No 2D 24 65 02C 1.01 34 0.36 69 Legacy No 2D 25 65 02C 1.45 15 0.2 58 Legacy No 2D 38 43 07H -0.98 37 0.19 62 New Yes Page 10 of 29

Plugging Summary (TS 5.6.9.e and TS 5.6.9.f)

As a result of the B2R23 SG inspections, performed in accordance with TS 5.5.9.d, the modes of tube degradation found were Anti-Vibration Bar (AVB) wear, tube support plate (TSP) wear, and secondary side foreign object (FO) wear. A total of forty-four (44) tubes were removed from service by mechanical tube plugging, are as follows:

  • An additional eight (8) tubes were preventatively plugged due to having AVB wear of a depth and growth rate that could limit operation up to 4 cycles.
  • Ten (10) tubes were preventatively plugged and stabilized due to TSP wear having a depth and growth rate that could limit operation up to 4 cycles.
  • Six (6) tubes were preventatively plugged due to foreign object wear in the presence of a PLP indication.
  • An additional two (2) tubes were preventatively plugged due to the presence of a PLP in a tube adjacent to a having foreign object wear.
  • Seven (7) tubes were preventatively plugged after being identified by screening as potentially high residual stress tubes.

82R23 Tube Plugginn by Degradation Mechanism (TS 5.6.9.e)

Degradation Mechanism SG2A SG 28 SG2C SG2D Total AVB Wear (>/= 40% TW) 5 2 3 1 11 AVB Wear- Preventative 4 3 0 1 8 TSP/Pre-heater Wear -

0 4 1 5 10 Preventative FO Wear < 40% - Preventative 4 0 1 1 6 PLP Present - Preventative 2 0 0 0 2 Potential High Residual Stress 1 2 1 3 7 Tube - Preventative Total Plui:iged during 82R23 16 11 6 11 44 Tube plugging was conducted in accordance with ASME Section XI, 2007 Edition through 2008 Addenda. All tube plugging was performed by Westinghouse using an Alloy 690 mechanical tube plugging process in accordance with ASME Section XI IWA-4713, "Heat Exchanger Tube Plugging by Expansion." All plugging was performed in accordance with Westinghouse approved procedures. There are no approved tube repair methods for the Unit 2 SGs. No tube sleeving was performed.

Tube Plugging to Date Number and Percentage per SG) (TS 5.6.9.f)

SG2A SG28 SG2C SG2D Total Total Plugi:ied durinQ B2R23 16 11 6 11 44 Total Stabilized during B2R23 0 4 1 5 10 Total Plugged through 82R23 175 153 172 53 553 Total Percent Plugged through 3.83% 3.35% 3.76% 1.16% 3.03%

82R23( 1l Note: (1) Plugging percentage is based on 4570 tubes per SG for all 4 SGs.

Page 11 of 29

Results of Condition Monitoring (TS 5.6.9.g)

A condition monitoring assessment was performed for each inservice degradation mechanism found during the B2R23 SG inspection. The condition monitoring assessment was performed in accordance with TS 5.5.9.a and NEI 97-06 Rev. 3 using the EPRI Steam Generator Integrity Assessment Guidelines, Revision 4. For each identified degradation mechanism, the as-found condition was compared to the appropriate performance criteria for tube structural integrity, accident induced leakage, and operational leakage as defined in TS 5.5.9.b. For each degradation mechanism a tube structural limit was determined to ensure that SG tube integrity would be maintained over the full range of normal operating conditions, all anticipated transients in the design specifications, and design basis accidents. This includes retaining a safety factor of 3.0 against burst under normal steady state full power operation primary to secondary pressure differential and a safety factor of 1.4 against burst under the limiting design basis accident pressure differential. The structural limits for wear related degradation were performed in accordance with the EPRI Steam Generator Integrity Assessment Guidelines and the EPRI Steam Generator Degradation Specific Management Flaw Handbook, Revision 2 (Flaw Handbook).

The as-found condition of each tubing degradation mechanism found during the 82R23 outage was shown to meet the appropriate limiting structural integrity performance parameter with a probability of 0.95 at 50% confidence, including consideration of relevant uncertainties thus satisfying the condition monitoring requirements. The NOE measured flaw depths are compared to the structural integrity condition monitoring (CM) limits, which account for tube material strength, burst relation, and NOE measurement uncertainties with a 0.95 probability at 50% confidence. Therefore, the NOE measured flaw sizes are directly compared to the CM limit. No indications met the requirements for proof or leakage testing; therefore, no In Situ Pressure tests were performed during 82R23. In addition, no tube pulls were performed during 82R23.

The sections below provide a summary of the condition monitoring assessment for each degradation mechanism found during 82R23.

AVB Wear- The two largest AVB wear indications found during the 82R23 inspection were 49% TW in SG 2A (R42-C56) and 50% TW in SG B (R42-C44) as measured by the EPRI Appendix H qualified technique 96004.3, Rev. 13. This is below the AVB wear CM limit of 64.3% TW.

Pre-Heater Baffle/TSP Wear- All TSP wear located at quatrefoil TSPs or drill hole baffle plate supports and independent if tapered or flat was depth sized using the +Point Examination Technique Specification Sheet (ETSS) 96910.1, Rev. 11 technique.

None of the TSP/drilled hole baffle plate wear indications exceeded the CM limits. The maximum quatrefoil TSP wear indication reported during 82R23 was in SG 2D at R48-C63 TSP 08C measuring an NOE depth of 32% TW. This bounding quatrefoil wear is below the CM limit for quatrefoil TSP wear of 52.7% TW. In addition, the maximum baffle plate wear indication reported during 82R23 was in SG 2D at R48-C63 TSP 05C measuring an NOE depth of 17% TW. The bounding quatrefoil wear (32% TW) is below the CM limit for quatrefoil TSP wear of 52.7% TW and bounding baffle plate wear (17%

TW) is less than the CM limit for drilled hole baffle plate wear of 54.9% TW. Therefore, condition monitoring for structural and leakage integrity has been satisfied for both quatrefoil TSP wear and baffle plate wear.

Page 12 of 29

Foreign Object Wear - All foreign object wear was depth sized using the +Point Examination Technique Specification Sheet (ETSS) 21998.1, Rev. 4 technique for small diameter indications. The deepest foreign object wear indication found during the B2R23 inspection was 37% TW with axial extent of 0.19 inch and a circumferential extent of 0.22 inch (Tube R38-C43 in SG 20). The CM limit for wear flaws with limited circumferential extent (up to 135 degrees/ 0.88 inch) and an axial extent of up to 0.25 inches is 64.1 % thus the CM performance criteria was satisfied. Note: Other shallower depth wear indications were longer and/or wider. Nevertheless, all historical FO wear and newly identified FO wear falls within the bounds of the CM limit of 53.0% TW defined by a 0.55 inch axial extent and 135 degree circumferential wear indication.

Primary to Secondary Leakage Assessment (TS 5.6.9.h and TS 5.6.9.i)

Byron TS 5.6.9.h reporting requirement states:

"For Unit 2, the operational primary to secondary leakage rate observed (greater than three gallons per day) in each steam generator (if it is not practical to assign the leakage to an individual steam generator, the entire primary to secondary leakage should be conservatively assumed to be from one steam generator) during the cycle preceding the inspection which is the subject of the report,"

Byron Station, Unit 2 did not observe any operational SG primary to secondary leakage over the preceding cycle. This is based on chemistry sampling taken from the Steam Jet Air Ejector and liquid SG blowdown sample locations.

Byron TS 5.6.9.i reporting requirement states:

"For Unit 2, the calculated accident induced leakage rate from the portion of the tubes below 14.01 inches from the top of the tubesheet for the most limiting accident in the most limiting SG. In addition, if the calculated accident induced leakage rate from the most limiting accident is less than 3.11 times the maximum operational primary to secondary leakage rate, the report should describe how it was determined ... ,"

Byron Station Unit 2 did not observe any SG primary to secondary operational leakage over the preceding cycle, therefore the calculated accident leakage rate from flaws below 14.01 inches from the TTS is not quantifiable.

Results of Monitoring for Tube Axial Displacement (Slippage) (TS 5.6.9.j)

All in-service tubes were monitored for tube axial displacement (slippage) in both the hot and cold leg tubesheet region in accordance with industry developed guidance for the bobbin probe. This was performed to ensure tubes had not severed within the tubesheet in regions of the tubesheet. The absence of tube sever indications (TSI) from the 100%

scope bobbin coil and X-Probe ' inspection data confirms no tubes had tube slippage.

Page 13 of 29

ATTACHMENT A Westinghouse Model D-5 TSP and AVB Configuration An*l-vibnuion

--..;::;..,.:;;.......-~t1-----bors 11H 11C 10H 10C 09H 09C OBtl OBC 07H 07C 06C 05H 05C 04C J:eedwatar Inlet 03H 03C 02C 01H me TSH TSC TEH TEC Nozzle Note: AVB bars are denoted as AV in the figure Page 14 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 2A)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl A 19 5 0.72 11 AV4 0.29 A 37 19 1.99 25 AVl 0.19 A 20 6 0.61 10 AV4 0 A 37 19 3.94 36 AV3 -0.17 A 25 7 1.12 15 AV2 -0.09 A 37 19 0.92 15 AV4 0.03 A 24 8 0.4 6 AVl 0.29 A 38 19 1.43 20 AV3 0.2 A 25 8 0.55 8 AVl 0.28 A 38 19 1.68 22 AV4 0.08 A 25 8 2.18 24 AV3 0.09 A 37 20 0.76 13 AV2 -0.25 A 25 8 0.87 12 AV4 0.03 A 37 20 1.98 24 AV3 0.05 A 26 8 0.73 11 AV3 0.33 A 38 20 2.98 30 AVl -0.03 A 29 10 4.99 40 AV3 0 A 38 20 2.16 26 AV2 0.39 A 29 11 0.54 10 AV2 0 A 38 20 1.4 19 AV3 -0.33 A 29 11 1.31 19 AV3 0 A 38 20 1.84 23 AV4 -0.35 A 29 12 0.96 15 AV2 0.25 A 36 21 1.51 21 AV3 -0.41 A 29 12 2.31 27 AV3 -0.45 A 36 21 1.07 17 AV4 0 A 29 13 1.31 19 AV3 0 A 37 21 1.22 18 AV3 0 A 31 14 1.63 22 AV3 0.02 A 38 21 1.6 22 AVl -0.39 A 31 14 1.52 21 AV4 0 A 38 21 1.18 18 AV3 0.03 A 34 14 2.04 25 AV2 0.17 A 38 21 0.84 14 AV4 0.16 A 34 14 0.98 16 AV3 0.19 A 39 21 0.68 12 AVl 0 A 31 15 0.63 11 AV3 0.07 A 39 21 3.19 32 AV3 0 A 31 15 0.54 10 AV4 -0.21 A 39 21 1.21 18 AV4 0 A 35 15 1.58 21 AV3 0 A 31 22 0.8 13 AV4 -0.26 A 35 15 0.95 15 AV4 -0.28 A 38 22 1.78 23 AV2 0.46 A 36 15 1 16 AV3 0.01 A 38 22 1.34 19 AV3 -0.35 A 36 15 1.87 24 AV4 -0.08 A 40 22 0.6 10 AV3 0.16 A 35 16 3.1 31 AV2 0.11 A 41 22 3.93 36 AV2 0.05 A 35 16 1.39 19 AV3 0.36 A 37 23 2.23 26 AV2 0.3 A 35 16 1.04 16 AV4 -0.44 A 37 23 2.42 28 AV3 0 A 37 16 0.57 10 AV3 -0.02 A 37 23 1.07 16 AV4 0 A 37 16 1.15 18 AV4 0.15 A 38 23 1.71 23 AVl 0 A 38 16 2.02 25 AV3 -0.14 A 38 23 1.1 17 AV2 -0.32 A 38 16 1.57 21 AV4 0.06 A 38 23 2.89 31 AV3 0 A 37 17 2.72 30 AV3 0 A 38 23 2.32 27 AV4 0 A 27 18 1.11 17 AVl -0.1 A 39 23 2.39 28 AV2 -0.14 A 35 18 0.56 10 AV3 0.17 A 39 23 2.3 27 AV3 0.03 A 36 18 1.48 20 AV2 0.08 A 39 23 1.25 18 AV4 -0.36 A 36 18 1.56 21 AV3 -0.3 A 42 23 0.91 15 AV2 0 A 37 18 1.92 24 AV2 -0.33 A 42 23 1.02 16 AV3 0 A 37 18 1.03 16 AV4 0.37 A 42 23 0.64 11 AV4 0 Page 15 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 2A)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl A 43 23 1.1 17 AV4 0 A 42 42 0.86 14 AV2 -0.3 A 38 24 1.8 23 AV2 0 A 40 46 1.07 17 AVl -0.13 A 38 24 1.4 19 AV3 -0.25 A 40 46 1.74 23 AV2 0.3 A 42 24 0.59 10 AV3 -0.16 A 40 46 3.53 34 AV3 0 A 43 24 1.09 17 AV4 -0.31 A 31 so 0.8 13 AV2 0 A 42 25 0.85 14 AVl 0.05 A 25 51 0.78 12 AV4 -0.54 A 42 25 1.75 23 AV2 -0.47 A 48 55 0.7 12 AV4 0 A 42 25 1.53 21 AV4 0.08 A 42 56 0.92 15 AVl 0.38 A 42 25 7.19 47 AV3 0 A 42 56 1.2 18 AV2 -0.11 A 45 25 1.4 20 AV3 0 A 42 56 1.71 23 AV4 0.44 A 45 25 1.31 19 AV4 0.05 A 42 56 7.82 49 AV3 0 A 38 26 1.99 24 AV2 0.44 A 48 56 2.11 26 AV3 -0.31 A 38 27 0.93 15 AV3 -0.28 A 48 56 1.58 22 AV4 -0.12 A 42 27 1.16 17 AV3 0.17 A 40 59 1.33 18 AV3 0.2 A 47 28 0.74 13 AV4 0.21 A 40 59 0.76 11 AV4 0 A 29 29 0.69 12 AV3 0 A 44 59 1.04 14 AV3 0 A 33 30 0.78 13 AV3 0.06 A 47 59 1.32 18 AVl 0.13 A 38 30 0.71 12 AV2 0.35 A 47 59 1.17 16 AV2 -0.03 A 38 30 1.7 22 AV3 -0.36 A 47 59 0.63 10 AV3 0.11 A 38 30 0.76 13 AV4 0.09 A 9 61 1.58 17 AV4 0.96 A 37 31 0.56 10 AV2 -0.18 A 37 61 1.05 12 AV3 0.14 A 37 31 0.7 12 AV3 -0.3 A 42 61 0.56 10 AVl 0.37 A 42 32 1.01 16 AV2 -0.14 A 38 63 3.23 29 AV2 0.12 A 42 32 0.52 10 AV3 0 A 38 63 3.77 33 AV3 0.05 A 25 33 1.06 16 AV2 0 A 38 63 1.04 12 AV4 0.13 A 41 33 1.1 17 AV2 0.07 A 20 64 1.5 20 AVl 0.33 A 41 33 1.52 21 AV3 -0.44 A 31 64 1.92 24 AV4 -0.03 A 42 33 0.97 16 AV3 -0.37 A 40 64 1.28 18 AVl -0.49 A 29 34 1.12 17 AV3 0 A 46 64 1.18 16 AV2 0 A 38 34 1.05 17 AV2 0.12 A 46 64 4.66 39 AV3 -0.46 A 38 34 1.56 22 AV3 0 A 46 64 4.56 38 AV4 -0.38 A 48 34 0.51 10 AV4 -0.24 A 40 66 1.14 16 AVl 0.29 A 29 35 0.49 9 AVl 0 A 40 66 0.79 13 AV2 0.11 A 29 35 1.09 16 AV3 0 A 31 67 1 12 AV2 0 A 39 35 1.04 16 AV3 0.07 A 31 67 0.59 8 AV4 0.38 A 37 36 0.68 12 AV4 0.14 A 30 68 0.74 13 AV2 0.14 A 45 36 0.99 16 AV2 0.14 A 30 68 0.66 12 AV3 0.25 A 40 42 0.63 11 AV2 0 A 30 69 1.53 18 AV2 -0.18 Page 16 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 2A)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl A 39 96 1.35 19 AV4 0.41 A 23 109 1.1 15 AVl 0.03 A 37 98 3.7 35 AV2 -0.53 A 23 109 0.45 7 AV4 -0.36 A 37 98 3.88 35 AV3 0.08 A 37 98 0.85 14 AV4 0.14 A 38 98 1.41 20 AVl 0.03 A 38 98 2.95 31 AV2 0 A 38 98 1.4 20 AV3 0 A 28 99 1.04 16 AVl 0.17 A 32 99 1.26 19 AV3 -0.3 A 34 99 1.18 19 AV3 -0.3 A 37 99 0.99 16 AV2 -0.4 A 37 99 1.69 22 AV3 0.09 A 35 100 1.5 21 AV3 0.2 A 31 101 1.59 21 AV2 0 A 31 101 2.74 30 AV3 0 A 33 102 0.83 14 AV4 0.19 A 30 103 1.52 21 AV2 0.34 A 31 103 1.76 23 AV2 0 A 31 103 1.64 22 AV3 0 A 31 103 0.86 14 AV4 0.05 A 27 104 1.18 16 AV2 0.08 A 28 104 1.15 16 AV4 0.2 A 29 104 0.91 13 AV3 0.08 A 30 104 1.31 18 AV2 0.5 A 30 104 0.68 11 AV3 -0.08 A 28 105 0.97 15 AV3 -0.26 A 28 105 1.84 23 AV4 0.02 A 30 105 0.67 10 AV2 0.03 A 24 106 0.54 9 AV4 -0.03 A 25 106 0.65 10 AVl 0.33 A 26 106 1.18 16 AVl -0.41 A 26 106 0.87 13 AV3 0.03 A 27 106 1.54 20 AVl 0.03 A 27 106 1.76 22 AV2 0 A 27 106 2.42 27 AV3 0.63 A 26 107 1.04 15 AV2 -0.33 A 26 107 1.45 19 AV3 0.11 A 22 109 0.57 9 AV4 0.24 Page 17 of 29

ATTACHMENT 8 Anti-Vibration Bar (AVB) Wear Indications (SG 28)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl B 21 6 0.88 11 AV4 0 B 33 14 1.42 20 AV4 -0.35 B 23 7 1 12 AV4 0.08 B 35 14 1.36 19 AVl 0.11 B 25 8 1.24 15 AV2 0 B 35 14 1.95 23 AV2 -0.11 B 25 8 0.7 12 AV3 0 B 35 14 0.81 13 AV3 -0.22 B 27 10 0.9 14 AV2 0.3 B 31 15 2.39 27 AV2 0 B 28 11 0.86 16 AV2 0 B 31 15 0.83 14 AV4 -0.24 B 28 11 3.13 32 AV3 0 B 35 15 2.76 29 AV2 -0.03 B 28 11 1.48 22 AV4 0 B 31 16 0.89 15 AVl -0.28 B 27 12 0.77 15 AV3 0.3 B 31 16 1.72 22 AV3 -0.32 B 28 12 0.64 14 AVl 0.16 B 32 16 1.25 18 AV2 -0.3 B 28 12 1.09 19 AV2 -0.08 B 32 16 1.14 17 AV3 0.08 B 28 12 0.42 10 AV4 0 B 34 16 0.87 13 AV3 -0.33 B 30 12 1.16 17 AV2 0.19 B 35 16 0.9 15 AVl 0.35 B 30 12 1.49 20 AV3 0.08 B 35 16 2.16 26 AV3 -0.41 B 31 12 2.31 26 AVl 0.49 B 36 16 1.01 15 AVl -0.14 B 31 12 3.37 32 AV2 0.03 B 36 16 2.59 28 AV2 0.17 B 31 12 5.18 40 AV3 -0.25 B 36 16 4.8 38 AV3 -0.45 B 31 12 2.27 26 AV4 0.03 B 36 16 1.8 22 AV4 0.19 B 32 12 1.08 16 AVl 0 B 31 17 0.95 15 AV2 0.33 B 32 12 2.55 28 AV2 0 B 31 17 1.37 19 AV3 0.19 B 32 12 0.48 8 AV3 0 B 34 17 1.31 18 AV3 0.05 B 32 12 1.54 20 AV4 0.11 B 34 17 0.74 12 AV4 0 B 29 13 0.6 11 AV3 -0.03 B 36 17 0.98 15 AVl -0.33 B 30 13 1.11 16 AV3 0.05 B 36 17 1.89 23 AV2 0.13 B 30 13 0.57 10 AV4 0.02 B 36 17 0.87 13 AV3 0.05 B 31 13 0.66 12 AVl 0.03 B 37 17 1.64 20 AV2 0.19 B 31 13 1.24 18 AV2 0.22 B 37 17 1.01 15 AV3 0 B 31 13 0.96 15 AV3 0.08 B 28 18 0.77 15 AV4 0.16 B 31 13 1.28 19 AV4 0.05 B 34 18 1.14 16 AV4 0.11 B 33 13 1.36 19 AVl 0.11 B 36 18 1.5 20 AV2 0.1 B 33 13 1.02 15 AV3 -0.05 B 36 18 1.1 15 AV3 0.14 B 28 14 1.01 18 AV2 0.16 B 31 19 1.09 17 AVl -0.53 B 28 14 0.97 17 AV4 0.28 B 34 19 0.81 13 AV3 0.1 B 30 14 1.02 15 AV3 0 B 37 19 2.64 28 AV2 -0.12 B 30 14 0.79 13 AV4 0 B 39 19 3.03 30 AV2 0.16 B 33 14 2.94 30 AVl 0.14 B 39 19 2.33 26 AV3 -0.38 B 33 14 3.5 33 AV2 0.46 B 39 19 1.81 23 AV4 -0.25 B 33 14 1.37 19 AV3 0.19 B 35 20 1.13 17 AV3 0.11 Page 18 of 29

ATTACHMENT 8 Anti-Vibration Bar (AVB) Wear Indications (SG 2B)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl B 36 20 1.13 16 AVl -0.1 B 28 29 1.11 17 AV2 0 B 36 20 2.05 24 AV2 -0.05 B 28 29 0.95 16 AV3 -0.03 B 36 20 1.28 18 AV3 0.17 B 36 29 1.1 17 AV2 0.08 B 39 20 1.4 19 AV2 0.25 B 36 29 1.1 17 AV3 0.11 B 40 20 2.84 30 AV2 0.05 B 39 29 0.78 13 AV3 0 B 40 20 2.38 27 AV3 0.06 B 41 29 1.26 18 AV3 0 B 40 20 1.23 18 AV4 0.08 B 43 29 1.59 21 AVl 0 B 39 21 1.52 20 AV2 0.11 B 43 29 4.43 37 AV2 0 B 39 21 1.26 18 AV3 -0.05 B 43 29 1.14 17 AV3 0 B 36 23 1.62 21 AV2 0.11 B 45 29 0.81 13 AV4 0 B 40 23 0.7 13 AV4 -0.11 B 34 30 1.05 15 AV1 -0.08 B 40 24 2.24 26 AV2 0 B 34 30 1.21 17 AV2 -0.25 B 43 25 4.16 36 AV2 0.38 B 34 30 2.4 26 AV3 0 B 43 25 2.71 28 AV3 -0.11 B 34 30 0.99 15 AV4 0 B 43 25 1.14 16 AV4 -0.11 B 27 31 0.88 17 AV3 0.02 B 45 25 0.9 14 AV4 0 B 27 31 1.42 23 AV4 0 B 34 26 1.89 23 AV3 0 B 48 31 0.55 10 AV4 0.11 B 35 26 0.93 15 AV2 0 B 49 31 0.97 15 AVl 0.08 B 39 26 2.13 25 AV2 0 B 49 31 0.86 14 AV3 0.11 B 39 26 0.65 11 AV3 0 B 49 31 0.7 12 AV4 -0.27 B 40 26 1.06 16 AV2 0.33 B 28 32 1.25 18 AV2 0.32 B 44 26 2.97 31 AV2 0.49 B 28 32 0.66 13 AV3 0 B 44 26 1.09 18 AV3 -0.11 B 31 32 0.75 14 AVl 0.3 B 45 26 2.75 29 AV2 0.41 B 31 32 0.85 15 AV2 0.24 B 45 26 4 35 AV3 -0.35 B 32 32 0.95 15 AV1 0.11 B 45 26 2.12 25 AV4 0.1 B 32 32 1.65 22 AV2 -0.05 B 28 27 1.21 17 AV2 0 B 32 32 2.55 28 AV3 -0.05 B 28 27 0.95 14 AV3 -0.13 B 32 32 0.98 16 AV4 0.14 B 39 27 1.4 19 AV2 0.22 B 35 32 0.67 13 AV2 -0.27 B 39 27 1.4 19 AV3 0.17 B 45 32 1.44 21 AV2 0.19 B 40 27 1.1 17 AV2 0.41 B 45 32 1.94 24 AV3 0.33 B 40 27 1.97 24 AV3 -0.35 B 34 33 1.97 24 AV2 0.38 B 40 27 0.52 10 AV4 0.17 B 34 33 0.95 15 AV3 0.14 B 32 28 1.87 23 AV2 0.39 B 39 33 1.17 17 AV2 0.41 B 32 28 1.39 20 AV3 0 B 39 33 1.5 20 AV3 0.11 B 32 28 1.35 20 AV4 0 B 39 33 1.05 16 AV4 -0.16 B 27 29 0.8 15 AV2 0.37 B 40 33 0.84 13 AV2 0.25 B 27 29 1.1 19 AV3 0.3 B 40 33 1.01 15 AV3 -0.38 Page 19 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 28)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl B 42 33 0.97 15 AV2 0.38 B 40 41 1.58 21 AV2 0.32 B 49 33 0.81 13 AV1 0.16 B 40 41 2.97 30 AV3 -0.51 B 49 33 0.7 13 AV4 0 B 32 42 0.62 12 AV3 -0.08 B 31 34 0.82 15 AV3 0.14 B 41 43 1.9 23 AV1 -0.3 B 40 34 0.78 13 AV1 -0.06 B 41 43 3.83 34 AV2 0 B 40 34 3.96 35 AV2 0.35 B 41 43 4.75 38 AV3 -0.4 B 40 34 0.8 14 AV3 0 B 42 44 8.76 so AV3 0 B 42 34 0.85 14 AV2 0.3 B 42 44 3.04 31 AV2 0.13 B 40 35 0.86 13 AV3 -0.19 B 42 44 1.76 24 AV4 0.03 B 32 36 1.51 21 AV2 0.38 B 21 45 1.1 16 AV4 0.17 B 32 36 1.23 18 AV3 0 B 40 45 1.16 17 AV2 0 B 34 36 1.38 21 AV2 0.22 B 44 45 0.9 14 AV2 0.21 B 34 36 0.61 12 AV3 -0.08 B 44 45 2.04 24 AV3 -0.54 B 42 36 1.38 20 AV2 0.35 B 28 46 1.12 17 AV2 0.05 B 45 36 0.83 15 AV2 0.32 B 49 49 0.93 16 AV1 0.14 B 45 36 2.99 31 AV3 -0.16 B 31 52 0.9 17 AV2 0.05 B 45 36 3.14 31 AV4 0 B 40 54 1.57 23 AV2 0 B 28 37 1.4 19 AV3 -0.11 B 40 54 1.47 20 AV3 0.28 B 42 37 1.29 18 AV1 0.25 B 47 56 1.23 18 AV1 0 B 42 37 2.04 24 AV2 0.33 B 47 56 2.71 30 AV2 0 B 42 37 2.46 27 AV3 0 B 40 59 2.7 28 AV3 0.06 B 49 37 0.8 13 AV1 0.03 B 40 59 1.1 15 AV4 0 B 49 37 0.56 10 AV3 -0.11 B 42 68 1.08 15 AV1 0.13 B 28 38 0.58 12 AV3 0.11 B 42 68 2.77 28 AV2 0 B 31 38 0.74 14 AV2 0.08 B 42 68 2.57 27 AV3 0.02 B 39 38 1.78 24 AV2 -0.11 B 42 68 0.98 14 AV4 0.12 B 39 38 2.08 24 AV3 0.08 B 39 69 1.14 17 AV3 0.22 B 10 39 1.15 16 AV4 0.78 B 38 71 1.25 19 AV1 -0.24 B 32 39 0.99 15 AV3 0.27 B 38 71 1.42 20 AV2 0.24 B 32 39 0.71 12 AV4 0.25 B 38 71 3.17 32 AV3 -0.04 B 34 39 1.15 18 AV2 -0.02 B 38 71 1.26 19 AV4 0.17 B 39 39 0.98 16 AV1 0.27 B 33 72 2.58 29 AV3 0 B 39 39 1.31 18 AV2 -0.36 B 33 72 1.21 19 AV4 -0.05 B 42 39 0.67 12 AV3 0.15 B 40 72 0.79 15 AV3 -0.35 B 46 39 1.12 16 AV2 -0.11 B 39 76 1.03 16 AV2 0.38 B 46 39 2.02 24 AV3 -0.11 B 39 76 1.14 17 AV3 0 B 32 40 1.04 18 AV2 0.28 B 41 76 1.22 18 AV1 -0.07 B 32 40 1.07 18 AV3 0.26 B 44 76 2.41 27 AV2 0.19 B 32 40 1.01 17 AV4 0.05 Page 20 of 29

ATTACHMENT 8 Anti-Vibration Bar (AVB) Wear Indications (SG 2C)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl C 21 6 0.72 16 AVl -0.07 C 36 20 1.08 17 AV3 0.05 C 22 6 1.44 22 AVl 0 C 37 20 1.01 16 AV2 -0.08 C 22 6 1.29 21 AV4 0 C 37 20 1.02 16 AV3 -0.32 C 23 6 2.15 29 AV4 0.05 C 39 20 1.09 17 AV2 0.3 C 26 8 0.84 18 AVl -0.07 C 36 21 2.43 28 AV3 0.4 C 26 8 1.35 23 AV2 -0.32 C 38 21 0.8 14 AV3 0.03 C 26 8 0.89 19 AV3 -0.32 C 40 21 3.66 34 AV2 0.33 C 26 9 1.27 21 AV2 0.25 C 40 21 1.42 21 AV3 -0.27 C 26 9 1.31 21 AV3 0.17 C 35 22 0.88 14 AVl 0.14 C 26 9 1.84 25 AV4 -0.37 C 35 22 2.09 26 AV3 0.11 C 27 11 0.82 14 AV3 0.02 C 36 22 1.3 19 AV2 0 C 29 11 1.6 22 AVl 0.37 C 36 22 1.23 18 AV3 0.09 C 31 12 1.08 17 AV3 0.06 C 38 22 1.73 23 AVl 0.2 C 26 13 0.56 13 AV2 0.05 C 38 22 1.23 18 AV2 -0.11 C 32 13 1.3 19 AV2 0.39 C 38 22 1.44 20 AV3 0 C 32 13 1.73 23 AV3 0.27 C 36 23 0.76 14 AV2 0.24 C 31 14 1.2 19 AVl 0.31 C 37 23 1.2 19 AV2 0.33 C 31 14 1.56 22 AV3 -0.15 C 37 23 1.05 17 AV3 0.27 C 34 15 0.74 13 AV2 0 C 42 23 1.31 18 AV3 0 C 33 16 0.75 14 AV3 0 C 36 24 0.99 16 AVl -0.58 C 38 16 1.97 25 AVl 0.27 C 36 24 0.93 15 AV2 -0.08 C 38 16 1.26 18 AV2 0.11 C 36 24 2.53 29 AV3 0.07 C 38 16 0.92 15 AV3 0 C 35 25 0.64 12 AVl 0.27 C 30 17 0.68 12 AV2 -0.27 C 35 25 1.88 24 AV2 0 C 30 17 0.93 15 AV3 -0.39 C 35 25 1.6 22 AV3 -0.05 C 36 17 1.04 16 AV3 0.08 C 36 25 1.59 22 AV2 -0.27 C 37 17 1.67 23 AVl 0 C 38 25 1.32 19 AVl 0.36 C 37 17 1.31 20 AV3 0.39 C 38 25 1.74 23 AV2 0.5 C 26 18 0.92 17 AV3 0.31 C 38 25 1.21 18 AV3 0.22 C 35 18 1.28 19 AV2 0.27 C 39 25 1.11 16 AVl 0.05 C 35 19 1.06 17 AV2 0.06 C 39 25 0.67 11 AV2 0.43 C 35 19 1.03 17 AV3 0 C 42 25 2.16 25 AV3 -0.3 C 36 19 0.9 15 AV2 0.14 C 39 26 1.19 17 AV3 0.03 C 36 19 2.06 25 AV3 0.11 C 41 26 1.14 18 AV2 0.11 C 38 19 1.08 17 AV2 -0.29 C 41 26 1.45 20 AV3 0.22 C 39 19 1.13 19 AV2 0.06 C 34 27 2.47 28 AV2 0 C 39 19 4.16 36 AV3 -0.13 C 34 27 1.13 18 AV3 0 C 36 20 0.8 13 AV2 0.46 C 36 27 1.5 21 AV3 0.03 Page 21 of 29

ATTACHMENT 8 Anti-Vibration Bar (AVB) Wear Indications (SG 2C)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl C 39 27 0.66 11 AVl 0.11 C 33 39 1.26 20 AV3 -0.34 C 41 27 1.17 18 AV2 0.08 C 29 40 1.39 22 AV2 0 C 31 28 0.65 14 AV2 0.25 C 29 40 1.33 21 AV3 0.02 C 32 28 0.92 17 AV2 0.16 C 39 40 0.62 12 AV2 0.38 C 32 28 0.95 18 AV3 0.06 C 39 40 1.1 17 AV3 -0.16 C 36 28 0.94 18 AV3 0.05 C 29 41 1.17 20 AV2 0.22 C 29 29 1.58 23 AV2 0.37 C 31 42 0.62 13 AV2 0.05 C 29 29 1.69 24 AV3 -0.32 C 36 42 1.06 19 AV3 0 C 34 29 1.23 21 AV2 0.38 C 29 43 0.83 16 AV2 0.16 C 34 29 1.11 20 AV3 0.08 C 29 43 1.81 25 AV4 0 C 41 29 1.19 18 AV2 -0.03 C 39 43 0.86 15 AVl 0.3 C 41 29 0.96 16 AV3 -0.33 C 29 44 1.01 18 AVl 0.28 C 42 29 0.74 12 AVl 0 C 29 44 1.17 20 AV2 0 C 42 29 1.33 19 AV2 0.33 C 29 44 1.51 23 AV3 0.08 C 42 29 2.22 26 AV3 0 C 37 46 0.88 16 AVl 0 C 29 30 1.08 19 AV2 0 C 37 46 1.14 19 AV3 0.11 C 35 30 2.13 27 AV2 0.29 C 33 47 0.96 18 AV2 0.19 C 43 30 1.01 16 AV3 -0.39 C 31 48 1.08 19 AV2 0 C 27 34 0.78 13 AV3 0 C 29 49 0.8 16 AV3 -0.3 C 37 34 0.95 17 AV3 0 C 39 49 1.3 21 AVl 0.11 C 43 34 0.91 15 AV3 0.14 C 39 49 1.02 18 AV2 0.09 C 28 35 1.3 20 AV3 0.03 C 31 50 0.87 17 AVl 0 C 28 35 1.42 21 AV4 -0.29 C 33 so 0.82 16 AV3 0.09 C 30 35 1.52 24 AV3 0 C 37 50 1.45 22 AV2 0.02 C 36 35 0.71 15 AV2 0.16 C 48 56 0.31 7 AV2 0.14 C 39 35 1.05 17 AVl 0.33 C 37 60 0.61 11 AV2 0 C 39 35 3.94 35 AV2 -0.05 C 37 60 2.08 25 AV3 0 C 39 35 3.67 34 AV3 -0.45 C 38 62 1.35 21 AVl -0.35 C 46 35 1.48 20 AV2 0.05 C 38 62 2.39 29 AV2 0.02 C 30 36 0.7 15 AV2 0.22 C 38 62 1.52 23 AV3 0.07 C 31 36 1.25 20 AV2 -0.31 C 41 63 1.31 21 AVl 0 C 43 36 2.03 25 AV3 0 C 41 63 2.88 32 AV3 0 C 43 36 1.04 17 AV4 0 C 41 63 1.01 18 AV4 0 C 29 38 0.92 17 AV3 -0.15 C 41 63 4.94 40 AV2 0.33 C 29 38 0.98 18 AV4 -0.21 C 31 64 1.48 22 AV2 -0.08 C 39 38 1 16 AV2 -0.16 C 37 64 0.78 15 AV2 0.31 C 39 38 1.82 23 AV3 -0.35 C 48 67 0.62 12 AV4 0.18 C 33 39 1.29 21 AV2 -0.16 C 44 72 0.87 16 AVl 0.06 Page 22 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 2C)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl C 32 73 1.13 20 AV3 0.36 C 39 83 1.93 25 AV2 0.05 C 21 74 1.45 21 AV1 0.66 C 39 83 0.9 16 AV3 0.38 C 30 74 0.94 17 AV2 0.72 C 39 83 0.79 14 AV4 0.33 C 30 74 1.03 18 AV3 0.06 C 40 83 3.81 36 AV2 -0.13 C 32 74 1.43 23 AV3 -0.36 C 40 83 1.75 25 AV3 0 C 19 75 1.64 22 AV1 0.14 C 28 84 1.85 23 AV3 -0.42 C 19 75 1.09 17 AV4 -0.37 C 30 84 1.06 17 AV2 0.22 C 32 79 1.07 19 AV2 -0.05 C 37 84 1.18 18 AV2 -0.03 C 32 79 1.86 26 AV3 -0.34 C 37 84 1.36 19 AV3 0.05 C 41 79 1.22 19 AV3 0 C 41 84 1.02 16 AV1 0 C 35 80 0.87 16 AV1 -0.08 C 41 84 0.83 14 AV2 0.05 C 35 80 0.78 15 AV2 -0.39 C 41 84 1.39 20 AV3 0 C 35 80 1.19 20 AV3 -0.38 C 26 85 1.49 21 AV2 0 C 36 80 0.89 17 AV1 -0.08 C 30 85 1.05 18 AV2 0.29 C 36 80 1.64 24 AV3 -0.34 C 30 85 1.04 18 AV3 0.05 C 36 80 0.93 18 AV4 0.56 C 34 85 1.23 20 AV2 -0.1 C 21 81 1.41 20 AV1 0 C 34 85 0.83 15 AV3 0 C 21 81 1.63 22 AV4 0 C 35 85 1.06 18 AV1 0 C 33 81 0.79 15 AV3 0.07 C 35 85 2.15 27 AV2 0 C 33 81 0.77 15 AV4 0.42 C 35 85 3.39 34 AV3 0 C 35 81 0.92 17 AV2 0.22 C 41 85 0.65 13 AV1 0.13 C 36 81 0.91 17 AV3 0 C 41 85 1.11 19 AV3 0.07 C 39 81 1.28 20 AV2 0 C 42 85 1.11 19 AV3 -0.45 C 39 81 0.95 16 AV3 -0.33 C 31 86 1.3 19 AV3 0.14 C 31 82 1.21 20 AV3 0.07 C 35 86 1 16 AV1 0.11 C 32 82 1.75 25 AV2 0.1 C 35 86 3.36 32 AV2 -0.58 C 35 82 1.11 19 AV2 0.1 C 35 86 1.27 19 AV3 0.1 C 35 82 1.59 23 AV3 -0.29 C 42 86 1.09 17 AV1 0.05 C 39 82 0.8 15 AV2 0.06 C 42 86 1.92 24 AV2 0.02 C 39 82 0.79 14 AV3 0 C 42 86 4.15 36 AV3 0 C 40 82 0.92 17 AV2 -0.03 C 42 86 0.86 14 AV4 0 C 43 82 0.66 13 AV3 -0.3 C 25 87 0.7 14 AV1 0.08 C 32 83 0.89 17 AV1 0 C 35 87 0.86 16 AV1 0 C 32 83 1.53 24 AV3 0.33 C 35 87 1.18 19 AV3 0.21 C 33 83 0.83 16 AV1 0.42 C 35 87 0.72 14 AV4 0.06 C 35 83 0.99 18 AV2 0 C 45 87 0.61 12 AV4 -0.07 C 35 83 1.11 19 AV3 0 C 35 88 1.47 20 AV3 0.2 C 39 83 0.82 15 AV1 0.14 C 41 88 2.18 26 AV2 0.15 Page 23 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 2C)

SG Row Col Volts Per Leen lnehl SG Row Col Volts Per Leen lnehl C 41 88 2.9 30 AV3 0.07 C 42 93 1.04 18 AV2 0 C 42 88 1.63 22 AV2 0.05 C 42 93 1.01 17 AV4 0.2 C 42 88 1.95 24 AV3 0.05 C 42 93 5.3 41 AV3 -0.25 C 41 89 2.43 29 AV1 -0.42 C 34 94 1.19 18 AV2 -0.06 C 41 89 1.75 24 AV2 -0.08 C 34 94 0.96 15 AV3 0.14 C 41 89 3.28 34 AV3 0.14 C 34 94 1.11 17 AV4 0.12 C 41 89 2.55 30 AV4 -0.36 C 36 94 1.25 18 AV2 0 C 42 89 1.36 21 AV1 0.08 C 39 94 1.47 22 AV2 0 C 42 89 3.02 33 AV2 0 C 39 94 0.95 17 AV3 0.02 C 42 89 4.99 41 AV3 0 C 34 95 0.83 15 AV2 -0.39 C 42 89 1.41 22 AV4 0.05 C 35 95 1.16 19 AV2 -0.44 C 22 90 1.27 19 AV1 0 C 40 95 1.71 24 AV1 -0.17 C 27 90 0.75 13 AV1 -0.35 C 40 95 0.9 16 AV2 0 C 30 90 1.24 18 AV2 -0.3 C 40 95 1.84 25 AV3 -0.18 C 40 90 0.7 12 AV1 -0.15 C 35 96 1.27 19 AV2 0 C 40 90 1.32 19 AV2 0.05 C 35 96 0.78 13 AV4 0.05 C 40 90 1.05 16 AV3 0.07 C 36 96 2.49 28 AV2 -0.03 C 40 90 0.91 15 AV4 0.08 C 36 96 0.68 12 AV3 0 C 42 90 1.18 18 AV1 -0.12 C 29 98 0.64 11 AV3 -0.19 C 42 90 1.75 23 AV2 -0.26 C 30 98 0.84 14 AV2 -0.42 C 42 90 3.11 31 AV3 0.07 C 28 99 0.92 16 AV1 0 C 42 90 1.3 19 AV4 0 C 30 99 0.57 12 AV2 0.35 C 27 91 0.81 15 AV3 -0.3 C 38 99 1.19 19 AV2 0.08 C 34 92 1.36 19 AV2 -0.18 C 30 100 1.04 16 AV2 0.12 C 34 92 1.26 19 AV3 0.09 C 30 100 0.95 15 AV3 -0.17 C 34 92 0.62 11 AV4 0.03 C 32 100 1.16 18 AV2 0.25 C 39 92 1.47 20 AV2 0.22 C 32 100 0.75 13 AV3 0.08 C 41 92 1.48 21 AV1 0.08 C 35 100 1.21 18 AV3 0.02 C 41 92 0.78 13 AV2 0.08 C 27 101 0.73 14 AV3 0.17 C 41 92 3.23 32 AV3 0.11 C 27 101 0.8 15 AV4 0 C 41 92 1.54 21 AV4 0.06 C 28 101 0.8 15 AV2 0.05 C 35 93 1.14 19 AV2 0.02 C 28 101 0.59 12 AV3 -0.45 C 36 93 1.3 20 AV2 0.2 C 30 101 0.83 15 AV2 -0.32 C 39 93 1.21 18 AV4 0.08 C 30 101 1.02 18 AV3 -0.46 C 40 93 1.57 23 AV1 0.23 C 32 101 0.82 15 AV2 0.05 C 40 93 1.09 18 AV2 -0.38 C 32 101 0.93 16 AV3 0.05 C 40 93 1.74 24 AV3 -0.32 C 28 103 2.09 27 AV3 -0.03 C 42 93 2.29 28 AV1 0 C 32 103 0.91 16 AV3 -0.16 Page 24 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 2C)

SG Row Col Volts Per Locn lnchl C 33 103 0.69 13 AV4 0 C 30 104 1.33 21 AV2 0.08 C 30 104 1.15 19 AV3 -0.49 C 25 105 0.82 14 AV2 0.26 C 30 105 0.8 15 AV4 -0.33 C 25 106 1.06 17 AVl 0.24 C 27 106 1.1 18 AV2 0.34 C 27 106 2.83 32 AV3 0.05 C 25 107 1.29 20 AV4 -0.17 C 25 108 0.83 15 AVl 0.08 C 25 108 2.92 32 AV2 -0.43 C 25 108 2.16 27 AV3 -0.09 C 25 108 0.55 11 AV4 0.48 Page 25 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 20)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl D 20 5 0.55 12 AV4 0.2 D 40 26 1.32 20 AV3 0.05 D 23 7 1.28 19 AV3 -0.35 D 38 27 0.69 13 AV2 0.34 D 25 7 1.01 18 AVl 0.05 D 39 27 0.93 16 AV2 0.08 D 28 11 0.95 16 AV2 0.13 D 39 27 0.85 16 AV3 0.33 D 28 11 0.89 16 AV3 -0.38 D 47 27 0.82 15 AV4 0.03 D 31 13 1.11 18 AVl 0.11 D 28 28 2.06 26 AV4 -0.46 D 31 13 0.7 14 AV2 0.19 D 40 28 1.26 19 AV3 -0.05 D 31 13 1.77 24 AV3 -0.43 D 40 29 3.26 33 AV2 -0.07 D 31 14 1 18 AV4 0.03 D 40 29 2.25 27 AV3 0 D 35 14 1.39 21 AV4 -0.39 D 42 29 1.5 21 AV2 0.22 D 31 15 0.96 17 AV2 -0.14 D 25 30 0.77 14 AV3 -0.2 D 32 16 0.71 13 AV2 0.05 D 41 32 0.61 12 AV2 0.38 D 35 17 2.16 27 AV2 0.05 D 41 32 1.58 23 AV3 0.53 D 35 17 1.12 19 AV3 0.08 D 37 33 0.58 12 AVl 0.05 D 36 17 1.31 20 AV2 0.2 D 37 33 3.35 34 AV2 0.49 D 36 17 0.84 15 AV3 0.25 D 37 33 2.81 31 AV3 0 D 31 18 0.94 17 AV2 0.36 D 40 33 1.42 21 AV2 0 D 36 18 0.68 12 AV2 0.05 D 40 33 2.34 28 AV3 0 D 36 19 1.92 25 AV3 -0.28 D 40 33 0.95 16 AV4 0 D 39 19 0.88 16 AV3 0.17 D 41 33 1.45 22 AV2 0.41 D 35 20 1.84 25 AV2 0.16 D 41 33 1.62 23 AV3 0.2 D 35 20 1.01 17 AV3 0.28 D 33 34 0.66 13 AV2 0.25 D 41 20 1.07 18 AVl 0 D 33 34 0.73 14 AV3 0.25 D 41 20 2.23 28 AV2 0.11 D 28 36 3.91 36 AV2 0.41 D 36 21 0.96 16 AVl 0.39 D 28 36 0.86 15 AV3 -0.37 D 36 21 1.31 20 AV2 0.41 D 40 36 1.23 19 AV2 0 D 41 21 0.88 16 AV2 0.16 D 40 36 1.25 20 AV3 0 D 41 21 0.89 16 AV3 0.08 D 42 36 1.14 18 AVl 0.12 D 40 22 0.86 15 AV2 -0.29 D 42 36 3.92 36 AV2 0 D 40 22 1.17 18 AV3 -0.29 D 42 36 1.72 24 AV3 0.07 D 40 22 1.02 17 AV4 -0.34 D 42 36 0.62 13 AV4 0.34 D 43 22 1.58 23 AVl -0.49 D 36 37 3.18 33 AV2 0 D 43 22 1.81 25 AV2 0.05 D 36 37 2.52 30 AV3 0.52 D 43 22 1.03 18 AV3 0.11 D 37 42 3.35 34 AV2 -0.45 D 28 24 0.81 14 AVl -0.1 D 37 42 1.25 20 AV3 -0.41 D 38 25 0.74 13 AV2 0.22 D 31 44 2.99 32 AV2 -0.03 D 38 25 1.56 22 AV3 0.1 D 31 44 1.48 22 AV3 0.42 D 40 25 0.98 16 AV3 0.02 D 41 44 0.59 12 AV3 0.33 Page 26 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 20)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl D 41 44 0.46 10 AV4 -0.31 D 28 78 0.93 16 AV3 0 D 29 45 0.67 13 AV3 0.14 D 33 78 0.82 14 AV2 -0.46 D 31 50 0.8 15 AVl 0.08 D 32 79 1.2 19 AV3 0.08 D 31 50 1.9 25 AV2 0.14 D 39 80 3.31 34 AV2 0.05 D 31 50 3.12 32 AV3 0 D 39 80 4.82 39 AV3 0.48 D 31 50 0.87 15 AV4 -0.07 D 41 80 1.83 25 AVl -0.03 D 39 52 0.66 13 AV3 0.36 D 41 80 0.61 12 AV3 0.08 D 39 52 0.55 11 AV4 0.06 D 42 80 0.49 11 AVl 0.03 D 47 56 1.1 18 AV3 0.08 D 46 80 0.95 17 AV4 0.5 D 47 56 2.17 27 AV4 0 D 19 82 0.96 18 AV4 -0.54 D 21 57 0.54 11 AVl 0.11 D 25 82 0.68 12 AV2 -0.13 D 21 57 0.92 16 AV4 -0.33 D 26 82 0.52 11 AV3 0.29 D 48 59 1.76 25 AV3 0.33 D 29 82 1.04 16 AV2 -0.03 D 48 59 0.99 18 AV4 0.03 D 36 82 2.63 30 AV2 0 D 41 60 0.95 17 AVl 0 D 36 82 1.63 23 AV3 0 D 41 60 4.5 38 AV2 0 D 36 82 1.25 20 AV4 0 D 41 60 6.65 45 AV3 0 D 37 82 1.13 19 AV2 0.11 D 36 62 0.62 11 AV2 0.19 D 37 82 0.91 16 AV4 -0.38 D 29 63 0.83 16 AV2 0.46 D 35 83 0.61 12 AV2 0.33 D 41 63 0.75 15 AVl 0.17 D 35 83 0.44 10 AV4 -0.19 D 28 65 0.95 17 AV2 0.24 D 36 83 0.94 17 AVl 0.08 D 26 70 0.86 16 AVl -0.3 D 36 83 1.69 24 AV2 0 D 26 70 2.06 26 AV2 0 D 36 83 1.01 17 AV3 0 D 26 70 1.37 21 AV3 0 D 31 84 1.59 21 AV2 0.03 D 33 70 0.78 15 AV3 0.08 D 31 84 1.69 22 AV3 -0.32 D 33 70 1.23 20 AV4 -0.43 D 31 84 1.01 16 AV4 -0.6 D 48 71 0.46 10 AVl -0.06 D 36 84 0.74 14 AV2 0 D 36 72 1.01 16 AV2 0 D 43 85 0.91 16 AV2 -0.17 D 36 72 0.53 10 AV3 0 D 43 85 0.96 16 AV3 -0.34 D 39 72 0.78 15 AVl 0.11 D 34 87 1.38 21 AV2 -0.14 D 39 72 0.96 17 AV2 0 D 34 87 1.17 19 AV3 0.14 D 39 72 1.59 23 AV3 0.33 D 34 87 0.58 12 AV4 -0.05 D 40 73 0.84 15 AVl 0.19 D 37 87 0.93 17 AV3 0.08 D 40 73 0.93 17 AV2 0 D 43 87 0.83 15 AV3 0.14 D 29 75 0.69 12 AV3 -0.34 D 34 89 0.57 12 AV3 0.08 D 29 76 0.94 15 AV4 -0.22 D 46 89 0.74 14 AV4 0.16 D 40 76 0.71 14 AVl 0 D 40 90 0.79 15 AV2 0 D 40 76 1.89 25 AV2 0 D 40 90 2.18 27 AV3 0 Page 27 of 29

ATTACHMENT B Anti-Vibration Bar (AVB) Wear Indications (SG 2D)

SG Row Col Volts Per Locn lnchl SG Row Col Volts Per Locn lnchl D 35 91 0.99 16 AV2 -0.49 D 30 104 0.8 15 AV4 0.23 D 35 91 0.61 11 AV3 0.33 D 31 104 0.65 13 AVl -0.46 D 43 91 0.64 13 AV4 -0.33 D 31 104 1.22 20 AV3 0.17 D 35 92 0.91 15 AV2 0.36 D 26 107 1.62 23 AV3 -0.32 D 35 92 0.99 16 AV3 0.08 D 26 107 0.87 16 AV4 0.08 D 40 92 0.98 17 AV3 -0.36 D 25 108 1.54 23 AVl 0 D 41 92 0.65 13 AV2 0 D 25 108 1.09 18 AV2 0 D 41 92 0.8 15 AV3 0 D 25 108 1.46 22 AV4 0.03 D 44 92 0.64 13 AVl 0.08 D 36 94 0.54 11 AVl 0.24 D 36 94 0.86 16 AV2 -0.16 D 36 94 1.4 21 AV3 0.14 D 22 95 0.86 15 AV4 -0.16 D 34 95 1.2 19 AV3 0.11 D 35 95 2.5 29 AV2 0.38 D 35 95 0.96 17 AV3 -0.05 D 36 95 0.92 17 AV3 -0.08 D 34 97 1.1 17 AVl -0.06 D 34 97 3.16 32 AV2 0.5 D 34 97 1.04 16 AV3 0 D 34 98 1.11 19 AV2 0 D 34 98 1.74 24 AV3 0 D 34 98 0.54 11 AV4 0.03 D 31 100 0.54 11 AVl 0.08 D 31 100 0.56 12 AV3 -0.16 D 34 100 0.72 12 AVl 0 D 34 100 1.37 19 AV3 0 D 34 100 0.52 10 AV4 0.27 D 36 100 0.81 15 AV4 -0.08 D 28 102 1.17 19 AV3 0 D 29 102 0.86 14 AV3 0.28 D 34 102 0.79 15 AV4 0 D 30 103 1.56 23 AV2 0 D 31 103 1.82 25 AV2 0 D 31 103 1.4 21 AV3 0.11 D 31 103 1.66 24 AV4 0.08 D 25 104 0.58 10 AV3 0.09 D 30 104 1.62 23 AV2 -0.4 Page 28 of 29

Page 29 of 29

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