W3F1-2003-0021, 12-Month Special Report SR-03-001-00 on the 11th Refueling Steam Generator Tube Inservice Inspection

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12-Month Special Report SR-03-001-00 on the 11th Refueling Steam Generator Tube Inservice Inspection
ML031050419
Person / Time
Site: Waterford Entergy icon.png
Issue date: 04/10/2003
From: Peters K
Entergy Nuclear South, Entergy Operations
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
W3F1-2003-0021
Download: ML031050419 (22)
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Text

Entergy Nuclear South Entergy Operations, Inc

- ~_17265 River Road Killona, LA 70066 Enteh y Tel 504 739 6440 Fax 504 739 6698 kpeters~entergy corn Ken Peters Director, Nuclear Safety Assurance Waterford 3 W3Fl-2003-0021 A4.05 PR April 10, 2003 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Subject:

Waterford 3 SES Docket No. 50-382 License No. NPF-38 12-Month Special Report SR-03-001-00 on the 11th Refueling Steam Generator Tube Inservice Inspection Gentlemen:

Attached is Special Report (SR) Number SR-03-001-00 for Entergy Operations, Inc (EOI) Waterford Steam Electric Station Unit 3. This report provides the complete results of the Refuel 11 Steam Generator Tube Inservice Inspection. This special report is being submitted in accordance with Technical Specifications 4.4.4.5.b and 6.9.2.

Very truly yours, Peters Director, Nuclear Safety Assurance KJP/RLW/ssf Attachment cc: E.W. Merschoff, NRC Region IV, N. Kalyanam, NRC-NRR, J. Smith, N.S. Reynolds, NRC Resident Inspectors Office 1P04

SPECIAL REPORT SR-03-001 -00 STEAM GENERATOR EDDY CURRNT EXAMINATION (11TH REFUELING OUTAGE)

1.0 INTRODUCTION

This report is submitted in accordance with Technical Specification 4.4.4.5.b. that requires the complete eddy current test results from Refuel #11 to be submitted in a special report pursuant to Technical Specification 6.9.2, within 12 months following the inspection.

The report shall include:

1. Number and extent of tubes inspected.
2. Location and percent of wall-thickness penetration for each indication of an imperfection.
3. Identification of tubes plugged or sleeved.

The eddy current testing examination program was performed to meet and exceed the requirements of Technical Specification 3/4.4.4. Waterford 3 performed all S/G eddy current testing examinations in accordance with EPRI "PWR Steam Generator Examination Guidelines" and its Appendix H qualified techniques. Previous reports contained additional detail as was required in the annual report in revision 0 of NEI 97-06. The current revision (Rev. 1) no longer requires this information; therefore, it has been removed from the format of the report.

2.0 Steam Generator Design The Waterford 3 Model 70 (3410 MWT) re-circulating steam generators were designed and fabricated by Nuclear Steam System Supplier Combustion Engineering (CE), Inc. in accordance with ASME Code,Section III NB for Class I vessels. The Waterford 3 steam generators each consist of 9,350 high temperature mill annealed Inconel 600 U-tubes arranged in a one-inch inner diameter triangular pitch pattern representing 103,574 ft2 of heat transfer area. The U-tubes are 3/4" O.D. by 0.048" nominal wall thickness explosively expanded the full depth of the tubesheet (CE's Expansion Process) and welded to the primary cladding. The secondary tube bundle support structure consists of carbon steel eggcrates. The secondary supports are arranged in the following order:

  • seven full horizontal eggcrate supports
  • six horizontal partial eggcrate supports
  • two anti-vibration straps (hot and cold batwings) seven vertical straps RF1 SpecialReport doc S/G Eddy Current Inspecton Page 1 of 21

3.0 Inspection Results 3.1 RF1 I Scope (Number and Extent Tested)

The Refuel #11 S/G eddy current testing (ECT) program consisted of the following inspection plans in Table 3.1:

Table 3.1 RF11 ECT Inspection SG #1 ECT Examination Type Inspections  % Scope Extent Tested Conducted Bobbin 8932 100 TEH to TEC RPC ET HL 8932 100 +2 to -5" of TTS Small Radius U-bends (1-3) 186 100 07H to 07C Previous/New Dents >2 volt 63 49 NA Previous/New Dings >5 volt 58 29 NA Previous/New Wear 132 37 NA Special Interest 521 NA SG #2 ECT Examination Type Inspections  % Scope Extent Tested Conducted Bobbin 8926 100 TEH to TEC RPC ET HL 8926 100 +2 to -5" of TTS Small Radius U-bends 188 100 07H to 07C Previous/New Dents >2 volt 96 59 NA Previous/New Dings >5 volt 100 45 NA Previous/New Wear 109 32 NA Special Interest 469 NA NOTE: The U-Bend Low Row (1-3) region of the 186 and 188 respective tubes in each S/G were examined with "+Pt." and straight sections inspected with bobbin coil.

RFl 1SpecialReporLdoc SIG Eddy Current Inspection Page 2 of 21

3.2 Degradation Mechanisms Identified Table 3.2 list the degradation mechanisms identified during the RF1 1 inspection:

Table 3.2 Degradation Mechanisms Identified in RF11 Location/Mechanism SG #1 SG #2 AVBITSP Wear (old) 274 257 AVB/TSP Wear (new) 83 81 TTS Axial Cracking 10 1 TTS Circumferential 13 3 Cracking Eggcrate Axial Cracking 2 0 Volumetric 1 3 Loose Part Wear 0 0 DINGS 560 706 Dents 129 163 3.3 Tube Integrity Acceptable tube integrity was demonstrated at the end of cycle 11 and condition monitoring requirements on burst pressure (3ANOP) and accident leakage rates were satisfied for all forms of degradation mechanisms identified during the Refuel #11 S/G eddy current testing.

All indications identified were well below their associated structural limits. The Waterford 3 Refuel #11 Condition Monitoring Report was documented via Westinghouse Document SG-SGDA-02-12, "Steam Generator Tube Integrity and Condition Monitoring Report for Waterford 3, RF11."

As part of Waterford 3's adherence to perform In-Situ Screening in accordance with EPRI, TR-107620, "Steam Generator In-Situ Pressure Test Guidelines", Rev. 1, all indications identified on attached Tables 1 and 2 were screened with no test required.

RF11 SpecialReport doc SIG Eddy Current Inspecton Page 3 of 21

4.0 Location and Percent of Wall-Thickness Penetration for Each Indication of an Imperfection This data is summarized in the attached Tables 3 and 4. The only flaws sized and left in service are for wear.

5.0 Percentage of Tubes Plugged or Sleeved Table 4.1 list the repairs made in RF11 and the cumulative repairs to date:

Table 4.1 Tubes Repaired to Date SG #1 SG #1 SG #2 SG #2 Plugs  % Plugged Plugs  % Plugged Prior to RF11 418 4.47 % 424 4.54 %

RF11 26 N/A 10 N/A Total 444 4.75 % 434 4.64 %

Sleeved Tubes 0 N/A 0 N/A On April 5, 2002 Waterford 3 successfully completed all S/G eddy current examinations and plugging activities. Additionally, Waterford 3 performed visual inspection of the S/G tubesheets for evidence of leaking tube plugs. As a result of the tubesheet scans, Waterford 3 did not identify any leaking tube plugs, thus closing the S/G primary side manways on April 12, 2002 to complete the RF#11 inspection.

Legend for Acronyms:

BWx Batwing Support (x = number)

DSI Distorted Support Indication DNG Ding DNT Dent MAI Multiple Axial Indication MVI Multiple Volumetric Indication NDD No Distinguishable Discontinuity NQI Non-Quantifiable Indication SAI Single Axial Indication SCI Single Circumferential Indication SVI Single Volumetric Indication TSH Tubesheet Hot Leg TWD Through-Wall Depth WAR Wear Reported with Rotating Probe RF 1SpecialReport doc S/G Eddy Current Inspection Page 4 of 21

Table 1 Results of In-Situ Screening for Indications in S/G #1 TUBE AND EDDY CURRENT INFORMATION TUBE INFORMATION PLUS POINT DATA BOBBIN DATA REGION - -- - - -_____ - RESULT OF SCREENING REGION ROW COL LOCATION CALL VOLTS LENGTH DEPTH AVG DEPTH ORIENTATION CALL VOLTS Batmng 2 6 BW9 -031 MVI 101 0 61 24% not calc Volum OD NDD No Teshng Required TSH 4 166 TSH +000 SAI 0 24 0 09 72% 55% AxialOD NOD _ No Testing Required TSH 6 16 TSH -012 SAI 0 32 014 49% 33% Axial OD NDD No Testing Required Eggcrate 11 113 01H -0 23 SAI 019 010 42% 38% Axial OD DSI 0 25 No Testing Required TSH 11 165 TSH -015 SAI 0 29 014 72% 48% Axial OD NDD NoTesting Required Eggcrate 12 114 01H -015 SAI 0 31 0 20 41% 33% Axial OD DSI 0 43 No Testing Required TSH 12 166 TSH -010 SAI 0 38 014 20% 12% Axial OD NDD - NoTesting Required TSH 19 109 TSH +0 07 SAI 153 013 37% 28% Axial OD NDD No Testing Required TSH 34 28 TSH -013 SAI 015 013 32% 30% Axial OD NDD NoTesting Requnred Above TSH 39 123 TSH 2 32 SAI 0 72 017 75% 66% Axial OD NOI 011 No Testing Required TSH 41 131 TSH -010 SCI 063 015 50% 47% Circ ID NDD NoTestingRequired TSH 59 65 TSH +0 27 SAI 015 0 25 60% 41% Axial OD NOD _ No Testing Required TSH 61 65 TSH +0 31 SAI 0 20 0 14 57% 54% Axial OD NDD No Testing Required TSH 64 84 TSH -0 24 SAI 128 0 17 63% 52% Axial OD NDD No Testing Required TSH 66 72 TSH +0 15 SCI 0 42 0 20 34% 34% Circ OD NDD No Testing Required TSH 79 85 TSH +0 40 SAl 015 015 70% 57% Axial OD NOD _ NoTesting Required Above TSH 79 87 TSH + 103 SAl 0 20 0 02 52% 49% Axial O NOD _ No Testing Required TSH 87 77 TSH -008 SAI 015 020 63% 45% AxialOD NOD _ NoTestingRequired RF1I SpecialReportdoc S/G Eddy Current Inspection Page 5 of 21

Table 2 Results of In-Situ Screening for Indications in SIG #2

_____________ TUBE AND EDDY CURRENT INFORMATION ____ ______

REGION TUBE INFORMATION PtUS POINT DATA BOBBIN DATA RESULT OF SCREENIN ROW COL LOCATION CALL VOLTS LENGTH DEPTH AVG DEPTH ORIENTATION CALL VOLTS TSH 9 57 TSH -011 SAI 0 28 015 49% 44% Axial OD NDD No Testing Required TSH 9 151 TSH -011 SAI 015 013 43% 37% Axial OD NDD - No Testing Required TSH 10 112 TSH +0 40 SAl 0 08 0 20 51% 45% Axial OD NDD No Testing Required TSH 14 112 TSH +019 SAl 016 0 20 69%6 54% Axial OD NDD No Testing Requlred TSH 16 110 TSH +025 SAl 012 010 51% 40% Axial OD NDD I No Testing Required TSH 20 150 TSH -0 03 SAl 018 011 72% 51% Axial OD NDD No Testing Required TSH 23 67 TSH +017 MAI 012 013 56% 52% Mult Axial OD NOD _ No Testing Required TSH 24 52 TSH +011 SAI 0 21 010 42% 39% Axial OD NDD No Testing Required TSH 26 60 TSH -0 03 SAI 0 30 0 08 33% 33% Axial OD NDD No Testing Required TSH 29 129 TSH +014 SCI 0 12 018 63% 56% Circ 00 NOD _ NoTesting Required TSH 36 34 TSH +004 SCI 0 16 018 95% 67% Circ OD NDD No Testing Required TSH 36 52 TSH +014 SCI 023 020 14% 10% Circ OD NDD NoTesting Required TSH 38 152 TSH -0 05 SAl 031 0 20 33% 28% Axial OD NDD NoTesting Required TSH 39 121 TSH -015 SCI 0 83 0 20 81% 67%/ Axial OD NDD No Testing Required TSH 41 121 TSH +008 SCI 0.12 0 20 67% 31% Circ OD NDD No Testing Required TSH 43 121 TSH +014 SVI 0 22 .10x.16 19% not calc Volum OD NDD No Testing Required TSH 45 147 TSH -0 05 SAI 018 013 52% 40% Axial OD NDD No Testing Required TSH 47 73 TSH +024 SAl 0 08 0 24 66% 42% Axial OD NDD No Testing Required TSH 49 61 TSH -0 09 SCI 3 05 019 45% 40% Circ. ID NDD No Testing Required TSH 55 109 TSH +0 27 SAI 0 09 010 69% 64% Axial OD NDD No Testing Requmred TSH 59 115 TSH +053 SAI 0 07 0 10 82%/o 81% Axial OD NDD No Testing Required TSH 60 112 TSH +023 SAl 015 0 20 63% 57% Axial OD NDD No Testing Required TSH 62 94 TSH +0 31 SAl 0 09 0 23 79% 56% Axial OD NDD No Testing Required TSH 70 94 TSH -014 SCI 0 29 021 45% 39°/ CimcID NDD No Testing Required TSH 74 150 TSH +007 SVI 1 23 .22 x 26 42% notcalc. Axial OD NDD No Testing Required TSH 75 77 TSH +044 SAl 0 40 008 54% 46% Axial OD NDD No Testing Required TSH 79 91 TSH +064 SAl 016 0 20 49% 37% Axial OD NDD No Testing Required TSH 84 94 TSH 4 09 MAI 018 0 20 57% 46% Mutt Axial OD NDD No Testing Required TSH 104 100 TSH +050 SAI 0 09 0 10 61% 61% Axial OD NDD No Testing Required TSH 106 90 TSH +0.22 SAI 0 09 0 20 65% 43% Axial OD NDD No Testing Required TSH 110 96 TSH +0 72 SAi 0 08 0 20 39% 36% Axial OD NOD _ No Testing Required TSH 128 60 TSH +017 SCI 0 97 016 34% 30% Cirr- OD NDD NoTesting Required TSH 33 5 TSH +519 SVI 0 26 .18 x.22 17%b not calc. Volum OD NQI 0 36 No Testing Required TSH 32 4 TSH +593 SVI 0 40 .24x.22 19% not calc. Volum OD NQI 0 30 No Testing Required RF1 lSpecialReportdoc S/G Eddy Current Inspection Page 6 of 21

Table 3 Percent of Wall-Thickness Penetrations for SIG #1 Row Column Indication %TW Support Location 1 7 PCT 4 07C -0.1 9 175 PCT 11 07H 0.75 12 138 PCT 14 02H 0.54 19 15 PCT 9 BW5 0.75 19 15 PCT 10 BW5 -0.84 19 27 PCT 11 BW5 0.81 19 63 PCT 9 BW5 0.76 19 167 PCT 14 BW5 0.76 19 171 PCT 9 BW5 -0.93 20 146 PCT 18 04H 0.67 21 39 PCT 11 BW5 0.83 22 112 PCT 7 BW5 0.79 22 128 PCT 6 BW5 0.85 23 39 PCT 9 BW5 0.71 23 57 PCT 8 BW5 0.65 24 56 PCT 6 BW5 -0.68 24 60 PCT 8 BW5 -0.76 24 68 PCT 10 BW9 -1.52 24 108 PCT 25 BW5 0.73 25 67 PCT 6 BW5 -1.11 26 62 PCT 8 BW9 -1.66 28 58 PCT 6 BW5 -0.74 29 59 PCT 7 BW5 -0.79 29 69 PCT 9 BW5 -0.78 30 60 PCT 13 BW5 0.68 31 67 PCT 10 BW5 0.87 32 22 PCT 8 BW5 -0.75 32 60 PCT 8 BW5 0.84 36 16 PCT 11 BW5 0.93 36 18 PCT 14 BW5 -1 36 18 PCT 11 BW5 0.86 36 118 PCT 11 BW5 0 37 41 PCT 11 BW5 -0.99 37 45 PCT 18 BW5 0.87 38 14 PCT 10 BW5 0.72 38 60 PCT 7 BW5 1.01 39 41 PCT 29 BW5 -0.96 39 111 PCT 15 BW5 0.94 40 168 PCT 16 BW5 0.95 42 20 PCT 9 BW5 -0.78 42 40 PCT 9 BW5 0.99 42 108 PCT 12 BW5 0.65 42 108 PCT 29 BW5 -0.57 42 112 PCT 11 BW5 0.97 42 112 PCT 11 BW5 -0.91 43 53 PCT 13 BW5 0.8 43 65 PCT 11 BW5 -0.9 44 46 PCT 20 BW5 0.98 44 46 PCT 26 BW5 -0.87 RF 1 SpecialReportdoc S/G Eddy Current Inspection Page 7of21

Table 3 Percent of Wall-Thickness Penetrations for S/G #1 Row Column Indication %TW Support Location 44 66 PCT 14 BW5 0.72 44 156 PCT 17 BW5 0.62 45 41 PCT 38 BW5 -0.96 45 49 PCT 12 BW5 0.88 45 105 PCT 17 BW5 0.83 45 105 PCT 13 BW5 0.08 45 105 PCT 20 BW5 -1 45 115 PCT 10 BW1 0.9 46 52 PCT 24 BW5 0.67 46 64 PCT 21 BW5 -0.87 46 70 PCT 19 BW5 0.73 48 66 PCT 14 BW5 -0.77 48 72 PCT 23 BW5 -0.71 48 72 PCT 21 BW5 -0.16 48 72 PCT 20 BW5 0.45 48 74 PCT 8 BW5 -0.03 48 74 PCT 10 BW5 -0.79 48 74 PCT 10 BW5 0.68 48 144 PCT 31 BW5 -0.88 48 144 PCT 17 BW5 0.71 49 79 PCT 21 BW9 1.51 49 99 PCT 15 BW1 1.74 49 115 PCT 15 BW5 -0.96 50 28 PCT 11 BW5 0.86 50 40 PCT 8 BW5 -0.85 50 56 PCT 15 BW5 0.76 50 56 PCT 9 BW5 -0.84 50 66 PCT 21 BW5 -0.8 50 120 PCT 10 BW5 0.9 50 134 PCT 13 BW5 -0.91 51 39 PCT 15 BW6 0.77 51 57 PCT 7 BW4 0.8 51 67 PCT 9 BW5 -0.78 51 67 PCT 22 BW4 0.84 51 77 PCT 33 BW4 0.92 53 83 PCT 25 BW9 -1.33 53 83 PCT 17 BW9 1.59 53 115 PCT 13 BW5 0.67 54 86 PCT 19 BW9 -1.7 54 92 PCT 13 08H 0.37 54 120 PCT 11 BW5 0.78 54 120 PCT 11 BW5 -0.81 55 13 PCT 7 BW5 0.67 55 21 PCT 7 BW6 0.7 55 137 PCT 13 BW5 0.8 55 137 PCT 15 BW4 0.7 56 68 PCT 7 BW4 -0.65 56 114 PCT 11 BW5 0.7 56 114 PCT 11 BW5 -0.76 RF1 I SpecialReportdoc S/G Eddy Current Inspecton Page 8 of 21

Table 3 Percent of Wall-Thickness Penetrations for S/G #1 Row Column Indication  % TW Support Location 57 87 PCT 18 BW9 1.73 57 139 PCT 12 BW4 0.64 57 147 PCT 19 BW5 0.41 58 86 PCT 25 BW9 1.66 58 108 PCT 14 BW5 -0.75 59 13 PCT 7 BW6 0.72 59 37 PCT 17 BW6 -0.84 59 49 PCT 11 BW5 0.73 60 86 PCT 28 BW9 1.61 61 15 PCT 10 BW6 1.01 61 15 PCT 9 BW5 0.94 61 15 PCT 11 BW5 -0.82 61 15 PCT 21 BW6 -0.85 61 35 PCT 12 BW6 0.85 61 35 PCT 12 BW5 0.8 61 63 PCT 10 BW5 0.83 61 79 PCT 12 BW5 0.82 61 111 PCT 9 BW4 0.7 61 115 PCT 14 BW4 0.69 61 119 PCT 10 BW4 0.7 61 127 PCT 12 BW4 0.79 61 139 PCT 12 BW4 0.74 62 10 PCT 16 BW5 -0.72 62 18 PCT 13 BW4 0.91 62 20 PCT 12 BW4 -0.83 62 20 PCT 17 BW4 0.83 62 84 PCT 5 BW9 -1.91 62 84 PCT 12 BW9 1.86 62 86 PCT 19 BW9 -1.54 63 63 PCT 10 BW6 1.16 63 63 PCT 10 BW5 1.32 63 137 PCT 14 BW5 -0.97 64 16 PCT 16 BW5 0.93 64 16 PCT 21 BW5 -0.75 64 16 PCT 14 BW4 -0.72 64 88 PCT 13 BW9 -1.63 66 18 PCT 18 BW5 -0.66 67 11 PCT 19 BW5 0.85 67 27 PCT 8 BW5 0.78 67 47 PCT 6 BW6 -0.54 68 58 PCT 17 BW5 -0.78 68 78 PCT 22 BW6 0.99 68 130 PCT 16 BW4 -0.91 70 24 PCT 20 BW5 -0.74 70 24 PCT 12 BW5 0.93 70 24 PCT 19 BW6 0.87 71 27 PCT 8 BW4 -0.73 72 120 PCT 26 BW4 0.94 72 126 PCT 22 BW4 -0.73 RF1 1SpecialReportdoc S/G Eddy Current Inspection Page 9 of 21

Table 3 Percent of Wall-Thickness Penetrations for S/G #1 Row Column Indication %TW Support Location 72 126 PCT 10 BW5 0.31 72 126 PCT 16 BW6 0.99 72 126 PCT 28 BW4 0.87 72 126 PCT 13 BW5 -0.99 73 19 PCT 9 BW4 1 73 85 PCT 9 BW9 1.56 73 85 PCT 9 BW9 1.77 74 14 PCT 20 BW4 0.83 74 14 PCT 10 BW1 -1.57 74 124 PCT 9 BW5 0.99 74 124 PCT 12 BW6 -0.99 74 124 PCT 15 BW5 -0.99 74 144 PCT 19 BW5 0.84 74 144 PCT 14 BW1 -1.29 74 144 PCT 26 BW6 0.89 76 38 PCT 12 BW5 -0.84 76 58 PCT 15 BW6 -0.62 76 96 PCT 14 BW5 -0.98 76 128 PCT 20 BW6 -0.99 76 128 PCT 22 BW5 -0.65 76 128 PCT 32 BW6 0.99 76 128 PCT 23 BW4 0.76 76 128 PCT 20 BW5 0.9 76 140 PCT 33 BW6 0.98 77 27 PCT 10 BW5 -0.74 77 27 PCT 11 BW6 0.93 77 27 PCT 16 BW6 -0.87 77 27 PCT 11 BW5 0.87 77 27 PCT 9 BW4 -0.82 77 35 PCT 6 BW5 -0.98 78 22 PCT 17 BW6 0.99 78 22 PCT 17 BW5 0.83 78 80 PCT 11 BW5 -0.61 78 80 PCT 8 BW6 1.02 78 98 PCT 12 BW6 0.73 78 100 PCT 16 BW6 0.96 78 100 PCT 11 BW5 -0.74 78 108 PCT 21 BW5 -0.7 78 108 PCT 17 BW6 -1.01 78 108 PCT 24 BW4 -0.58 78 142 PCT 20 BW4 -0.73 78 142 PCT 24 BW6 -0.81 78 142 PCT 18 BW5 0.14 78 144 PCT 32 BW4 0.78 78 144 PCT 33 BW6 0.98 78 144 PCT 19 BW6 -0.78 78 144 PCT 21 BW5 0.34 78 144 PCT 20 BW5 -0.75 78 144 PCT 34 BW4 -0.92 RF1 SpecialReport doc S/G Eddy Current Inspection Page IO of 21

Table 3 Percent of Wall-Thickness Penetrations for S/G #1 Row Column Indication %TW Support Location 80 38 PCT 14 BW4 0.92 80 38 PCT 26 BW6 -0.83 80 38 PCT 13 BW5 -0.76 80 86 PCT 10 BW9 -1.65 81 21 PCT 12 08C 0.78 81 61 PCT 22 BW4 0.75 81 65 PCT 16 BW4 -0.68 81 85 PCT 7 BW9 1.75 81 147 PCT 12 BW6 0.89 81 149 PCT 14 08C 0.79 81 159 PCT 7 BW9 -2 82 18 PCT 17 BW4 0.86 82 20 PCT 16 BW6 -0.85 82 38 PCT 20 BW5 -0.78 82 38 PCT 35 BW6 -0.98 82 54 PCT 14 BW6 -0.88 82 54 PCT 27 BW5 0.85 82 54 PCT 17 BW5 -0.96 82 62 PCT 11 BW4 -0.6 82 82 PCT 25 BW5 0.83 82 84 PCT 8 BW6 -0.82 82 84 PCT 8 BW6 0.99 82 86 PCT 19 BW9 0 82 96 PCT 10 BW5 -0.67 82 126 PCT 17 BW6 0.73 82 126 PCT 16 BW6 0.89 82 138 PCT 32 BW6 0.75 82 138 PCT 14 BW4 -0.84 82 138 PCT 16 BW4 0.98 82 138 PCT 21 BW5 0.67 82 140 PCT 21 BW4 0.89 82 140 PCT 19 BW6 0.98 82 140 PCT 31 BW6 -0.92 82 142 PCT 25 BW6 -0.85 82 144 PCT 13 BW5 -0.75 83 29 PCT 7 BW5 -0.2 83 81 PCT 9 BW3 0.78 83 97 PCT 12 BW6 0.96 83 97 PCT 15 BW6 -0.96 83 97 PCT 18 BW5 -0.83 83 149 PCT 16 BW7 0.64 85 59 PCT 16 BW4 0 87 27 PCT 12 BW7 -0.65 87 41 PCT 11 BW9 2 88 42 PCT 15 BW3 -0.62 88 48 PCT 18 BW3 -0.8 90 96 PCT 8 BW3 -0.76 91 115 PCT 14 BW91 0.47 92 22 PCT 14 BW5 0.85 RF 1SpecialReport doc S/G Eddy Current Inspection Page 11 of 21

Table 3 Percent of Wall-Thickness Penetrations for SIG #1 Row Column Indication %TW Support Location 95 145 PCT 11 09C 0.72 96 58 PCT 17 BW3 0.27 96 58 PCT 13 BW3 0.92 97 75 PCT 18 BW3 -0.43 97 75 PCT 12 BW7 -0.32 98 76 PCT 19 BW3 -0.85 99 117 PCT 17 BW4 -0.85 100 32 PCT 15 09H -0.87 100 70 PCT 13 BW6 -0.86 100 70 PCT 16 BW3 -0.92 100 142 PCT 16 09C -0.89 100 146 PCT 16 BW4 -0.73 100 146 PCT 15 BW6 0.87 100 146 PCT 13 BW6 -0.7 101 75 PCT 14 BW3 0.99 102 42 PCT 22 BW3 -0.78 102 76 PCT 18 BW3 0.99 104 144 PCT 18 BW3 -0.89 104 146 PCT 17 BW3 -0.83 105 31 PCT 8 BW7 -0.72 105 35 PCT 25 BW5 0.99 105 43 PCT 7 BW3 0.86 105 45 PCT 9 BW7 0.94 105 53 PCT 22 BW3 -1.07 105 73 PCT 12 BW5 0.97 105 73 PCT 14 BW4 1 105 77 PCT 12 BW7 0.89 106 98 PCT 7 BW7 0.94 107 31 PCT 11 BW7 -0.78 107 81 PCT 8 BW3 0.46 108 74 PCT 17 BW3 -0.7 109 39 PCT 9 BW5 -0.75 110 40 PCT 15 BW7 -0.8 110 42 PCT 19 BW3 0.97 113 39 PCT 13 BW7 0.97 114 34 PCT 13 BW9 1.86 114 40 PCT 12 BW6 -0.74 114 68 PCT 8 BW1 -1.59 116 42 PCT 12 BW6 -0.81 116 44 PCT 14 BW4 0.94 116 74 PCT 16 BW2 0.99 116 74 PCT 19 BW3 0.99 117 53 PCT 16 BW4 -0.57 117 71 PCT 20 BW2 0.71 118 76 PCT 15 BW4 0.59 119 65 PCT 10 BW2 0.86 120 42 PCT 19 10H 0.99 120 42 PCT 17 BW3 0.78 120 42 PCT 12 BW3 -0.93 RFI1SpecialReport doc S/G Eddy Current Inspecton Page 12 of 21

Table 3 Percent of Wall-Thickness Penetrations for S/G #1 Row Column Indication %TW Support Location 120 58 PCT 10 10H -0.99 121 71 PCT 11 BW6 0.97 123 77 PCT 9 BW6 -0.82 123 127 PCT 9 BW2 0.82 124 58 PCT 15 BW2 -0.91 125 83 PCT 13 BW5 -0.79 125 105 PCT 10 BW9 1.88 126 72 PCT 15 BW3 0.97 126 90 PCT 8 BW2 1.06 127 127 PCT 8 BW3 0.94 127 129 PCT 7 BW2 -0.91 127 129 PCT 9 BW2 -0.85 129 59 PCT 16 BW3 -0.62 130 82 PCT 17 BW2 1.12 130 82 PCT 16 BW2 -0.7 130 94 PCT 6 BW2 -0.82 131 51 PCT 7 08C 0.78 133 77 PCT 18 BW3 -0.67 133 77 PCT 12 BW2 -0.23 133 77 PCT 15 BW4 -0.79 133 121 PCT 9 BW3 -0.58 133 121 PCT 17 BW2 -0.85 133 121 PCT 26 BW2 0.82 135 67 PCT 14 BW3 -1.17 135 119 PCT 18 BW3 0.83 135 119 PCT 20 BW4 -0.92 135 119 PCT 17 BW4 0.98 135 119 PCT 9 BW7 -0.86 135 119 PCT 15 BW2 0.72 135 119 PCT 25 BW2 -0.95 136 78 PCT 13 BW2 -0.97 137 65 PCT 14 BW4 0.96 137 119 PCT 8 BW2 -0.49 138 60 PCT 20 09H -1 138 88 PCT 12 BW3 -0.49 138 88 PCT 12 BW3 0.81 139 111 PCT 17 BW2 -0.86 141 63 PCT 17 BW1 -1.69 141 85 PCT '25 BW3 -0.96 141 113 PCT 11 BW9 -1.95 142 94 PCT 10 BW2 0.9 144 72 PCT 11 BW9 1.96 145 73 PCT 27 BW1 1.22 145 95 PCT 8 BW9 -2 145 101 PCT 11 BW9 -1.61 145 101 PCT 5 BW1 1.41 145 103 PCT 3 BW1 -0.97 145 103 PCT 11 BW7 0.99 145 103 PCT 10 BW9 1.89 RF11 SpecialReport doc S/G Eddy Current Inspection Page 13 of 21

Table 3 Percent of Wall-Thickness Penetrations for SIG #1 Row Column Indication %TW Support Location 145 103 PCT 23 BW8 0.91 145 103 PCT 8 BW2 0.99 145 103 PCT 13 BW2 -0.17 145 103 PCT 17 BW1 1.82 145 103 PCT 12 BW9 -1.88 146 76 PCT 24 BW1 1.6 146 78 PCT 17 BW4 0.99 146 80 PCT 29 BW1 -1.69 146 88 PCT 24 BW1 1.51 146 88 PCT 17 BW9 1.59 146 100 PCT 11 BW9 1.48 147 85 PCT 13 09H 0 147 89 PCT 12 BW1 -2.13 147 91 PCT 10 BW9 -1.88 RFl 1SpecialReport.doc SIG Eddy Current Inspection Page 14 of 21

Table 4 Percent of Wall-Thickness Penetrations for S/G #2 Row Column Indication %TW Support Location 3 113 PCT 15 06C 0.18 7 113 PCT 14 BW9 -0.94 10 24 PCT 16 05H 0.84 11 3 PCT 15 BW9 -1 11 163 PCT 17 BW9 0.84 11 175 PCT 18 BW1 1.59 19 3 PCT 29 BW5 0.8 19 25 PCT 13 BW9 -0.52 19 25 PCT 12 BW5 0.78 19 25 PCT 22 BW5 -0.86 19 65 PCT 25 BW5 -0.78 19 111 PCT 12 BW5 0.9 19 113 PCT 10 BW5 -0.84 19 113 PCT 9- BW5 0.96 19 117 PCT 21 BW5 -0.74 20 68 PCT 18 BW5 -0.74 20 68 PCT 8 BW5 0.87 20 68 PCT 36 BW1 -1.5 21 109 PCT 14 BW5 0.73 22 44 PCT 8 BW5 -0.89 22 146 PCT 19 BW9 0.65 23 15 PCT 8 BW5 -0.82 24 56 PCT 8 BW5 -0.83 24 110 PCT 8 BW5 -0.83 27 33 PCT 14 03H 0.8 27 137 PCT 9 BW1 -0.8 29 49 PCT 20 BW9 -0.56 30 10 PCT 19 BW9 0.73 30 20 PCT 17 BW9 0.68 32 112 PCT 14 BW5 0.63 33 15 PCT 12 BW5 -0.89 34 8 PCT 13 BW5 -0.95 34 8 PCT 9 BW5 0.76 34 124 PCT 8 BW9 0.24 34 144 PCT 11 BW5 -0.84 34 170 PCT 18 BW5 0.69 35 17 PCT 8 BW5 -0.89 35 37 PCT 9 BW5 -0.93 35 53 PCT 9 BW5 0.71 35 53 PCT 8 BW5 -0.91 36 4 PCT 15 BW5 -0.89 36 54 PCT 13 BW5 -0.89 37 65 PCT 16 BW5 -0.71 37 125 PCT 10 BW5 -0.96 37 141 PCT 11 BW5 -0.7 37 155 PCT 19 BW5 -0.96 37 157 PCT 10 BW5 0.85 37 157 PCT 13 BW5 -0.91 38 22 PCT 19 BW9 -1.09 RF11 SpecialReport doc S/G Eddy Current Inspecbon Page 15 of 21

Table 4 Percent of Wall-Thickness Penetrations for S/G #2 Row Column Indication %TW Support Location 38 158 PCT 9 BW5 0.95 38 164 PCT 14 BW9 0.6 39 111 PCT 11 BW9 -0.78 40 14 PCT 11 BW9 -1.42 40 108 PCT 25 BW5 -0.8 40 108 PCT 20 BW5 0.86 40 154 PCT 18 BW5 0.92 41 9 PCT 10 BW5 -0.37 41 39 PCT 12 BW5 0.86 41 127 PCT 14 BW5 0.97 41 139 PCT 19 BW5 0.84 41 149 PCT 25 BW5 0.83 41 167 PCT 16 BW5 1 42 108 PCT 13 BW5 0.75 42 108 PCT 10 BW5 -0.74 43 37 PCT 15 BW5 -0.9 43 37 PCT 17 BW5 0.84 43 69 PCT 30 BW5 0.96 43 69 PCT 16 BW5 -0.96 43 149 PCT 16 BW5 0.82 44 16 PCT 30 BW5 -0.96 44 16 PCT 14 BW5 0.81 44 40 PCT 13 BW5 -1.07 44 40 PCT 10 BW5 0.79 44 48 PCT 13 BW5 0.83 44 50 PCT 15 BW5 -0.92 44 52 PCT 17 BW5 -0.92 44 52 PCT 11 BW5 0.89 44 154 PCT 9 BW5 -0.98 45 137 PCT 13 BW9 -0.32 45 145 PCT 27 BW5 -0.93 45 145 PCT 23 BW5 0.61 45 167 PCT 21 BW5 -0.79 46 6 PCT 16 BW5 -0.87 46 32 PCT 17 BW5 -0.98 46 32 PCT 9 BW5 0.95 46 34 PCT 14 BW5 0.87 46 34 PCT 14 BW5 -0.9 46 40 PCT 10 BW5 0.84 46 52 PCT 12 BW5 -0.71 46 - 52 PCT 6 BW5 0.84 46 64 PCT 29 BW5 0.98 46 68 PCT 19 BW5 -0.77 46 68 PCT 28 BW5 0.89 46 68 PCT 18 BW5 -0.68 46 68 PCT 27 BW5 0.78 47 51 PCT 14 BW5 0.81 47 143 PCT 27 BW5 0.71 47 147 PCT 19 BW5 0.68 RFl1SpecialReportdoc SIG Eddy Current Inspecton Page 16 of 21

Table 4 Percent of Wall-Thickness Penetrations for S/G #2 Row Column Indication %TW Support Location 47 147 PCT 13 BW5 -0.59 48 18 PCT 11 BW5 0.83 48 18 PCT 31 BW5 -0.68 48 30 PCT 10 BW5 -0.78 48 46 PCT 11 BW5 -0.84 48 52 PCT 9 BW5 -0.74 48 52 PCT 5 BW5 0.84 48 70 PCT 13 BW5 1 48 70 PCT 19 BW5 -0.98 49 149 PCT 23 BW5 0.76 50 142 PCT 10 BW5 -0.96 52 34 PCT 10 BW6 -0.8 52 164 PCT 16 BW9 -0.9 54 84 PCT 22 BW1 -2.07 54 88 PCT 35 BW9 1.72 56 88 PCT 32 BW9 -1.51 59 35 PCT 25 BW6 0.61 60 42 PCT 12 BW4 0.66 60 58 PCT 8 BW6 0.66 62 136 PCT 16 BW9 0.54 64 154 PCT 11 BW6 -0.74 66 50 PCT 23 BW9 -1.49 66 96 PCT 14 BW1 2.01 66 156 PCT 17 08C -0.22 68 144 PCT 15 BW4 -0.65 69 25 PCT 14 BW6 0.88 69 35 PCT 12 BW5 0.96 69 85 PCT 27 BW9 -1.61 70 56 PCT 9 BW5 0.88 70 138 PCT 9 BW5 0.31 70 160 PCT 22 08C 0.77 71 159 PCT 12 BW4 -0.6 72 104 PCT 13 BW5 0.85 73 53 PCT 28 BW6 -0.7 73 53 PCT 8 BW5 -0.82 73 53 PCT 18 BW6 0.87 73 53 PCT 15 BW5 0.98 73 57 PCT 25 BW6 0.92 74 20 PCT 17 BW9 1.56 74 48 PCT 19 BW6 0.97 74 48 PCT 27 - BW4 1.16 74 48 PCT 37 BW5 1.08 74 118 PCT 31 BW5 -0.83 74 118 PCT 16 BW6 0.88 74 118 PCT 30 BW4 -0.81 76 24 PCT 20 BW5 -0.83 76 24 PCT 16 BW4 -0.88 76 24 PCT 20 BW6 1.07 76 42 PCT 15 BW6 1.13 RF11 SpecialReport doc SIG Eddy Current Inspecton Page 17 of 21

Table 4 Percent of Wall-Thickness Penetrations for S/G #2 Row Column Indication %TW Support Location 76 156 PCT 12 BW4 0.86 77 37 PCT 9 BW4 -0.95 77 37 PCT 12 BW4 0.95 77 37 PCT 14 BW5 0.78 77 37 PCT 9 BW5 -0.92 77 47 PCT 11 BW4 -1.1 77 49 PCT 12 BW5 0.84 77 51 PCT 26 BW4 -0.88 77 57 PCT 14 BW5 -0.88 77 61 PCT 22 BW4 0.91 77 61 PCT 18 BW4 -0.97 77 71 PCT 20 BW5 0.67 77 71 PCT 20 BW4 0.78 77 107 PCT 13 BW4 -0.53 77 117 PCT 19 BW6 -0.7 78 20 PCT 15 BW4 -0.77 78 28 PCT 12 BW9 2 78 28 PCT 19 BW6 -0.8 79 25 PCT 7 BW6 -0.96 79 25 PCT 8 BW6 0.94 79 49 PCT 12 BW6 -0.76 79 139 PCT 16 08C -0.14 80 26 PCT 19 08C -0.99 80 28 PCT 22 BW6 0.99 80 48 PCT 31 BW5 -0.94 80 52 PCT 14 BW4 0.73 80 150 PCT 14 08H 0.95 81 21 PCT 13 BW6 -0.8 81 27 PCT 14 BW6 1 81 27 PCT 9 BW4 -0.74 81 33 PCT 12 BW9 1.99 81 33 PCT 17 BW5 1.33 81 49 PCT 10 BW6 1.07 81 49 PCT 17 BW6 -0.58 81 49 PCT 21 BW5 0.96 81 55 PCT 11 BW5 0.92 81 57 PCT 22 BW4 -0.75 81 61 PCT 10 BW4 0.97 81 87 PCT 15 BW6 0.94 81 91 PCT 9 BW5 0.97 81 91 PCT 11 BW4 0.9 81 97 PCT 19 BW4 0.92 81 97 PCT 18 BW6 -0.65 81 97 PCT 33 BW5 0.97 82 22 PCT 15 BW4 0.96 82 26 PCT 13 BW5 -0.94 82 26 PCT 17 BW6 -0.8 82 26 PCT 11 BW5 0.99 82 26 PCT 20 BW6 0.96 RF1 1SpecialReport.doc S/G Eddy Current Inspection Page 18 of 21

Table 4 Percent of Wall-Thickness Penetrations for SIG #2 Row Column Indication %TW Support Location 82 28 PCT 29 BW6 0.97 82 28 PCT 16 BW5 -0.96 82 28 PCT 15 BW4 -0.69 82 54 PCT 19 BW4 0.88 82 64 PCT 17 BW6 -0.88 82 64 PCT 18 BW4 0.72 82 128 PCT 22 BW6 0.68 82 128 PCT 29 BW5 0.72 82 160 PCT 9 BW9 -2.05 83 33 PCT 8 BW5 0.8 83 35 PCT 13 BW7 -0.98 83 35 PCT 12 BW7 0.97 83 35 PCT 18 BW5 0.93 83 41 PCT 16 BW3 0.73 83 51 PCT 9 BW7 0.83 83 57 PCT 19 BW3 -0.8 83 107 PCT 14 BW3 -0.84 83 153 PCT 11 BW1 0 83 159 PCT 19 BW9 -1.75 84 88 PCT 10 BW4 -0.7 85 87 PCT 8 BW5 0.8 85 143 PCT 13 BW3 -0.71 86 158 PCT 12 BW5 -0.57 90 20 PCT 29 09H -0.96 91 107 PCT 14 BW3 0.83 91 117 PCT 15 BW3 -0.76 91 147 PCT 12 09C -0.97 92 136 PCT 15 BW4 -0.85 94 24 PCT 16 BW9 1.99 94 24 PCT 23 BW9 0.09 94 30 PCT 27 09C 0.03 94 40 PCT 16 BW6 0.93 94 40 PCT 12 BW3 -0.85 94 42 PCT 13 BW7 -0.72 94 56 PCT 13 BW4 -0.92 94 56 PCT 11 BW3 -0.76 96 42 PCT 19 BW3 -0.77 96 42 PCT 12 BW3 0.83 96 144 PCT 15 08C -1.01 97 85 PCT 12 BW3 0.83 97 85 PCT 13 BW4 0.86 100 36 PCT 15 BW5 -0.77 101 85 PCT 8 BW4 0.91 101 95 PCT 19 BW3 0.83 101 149 PCT 26 09C 0.75 101 149 PCT 22 09C -1.09 102 78 PCT 14 BW3 -0.55 103 147 PCT 10 09C -1.06 104 122 PCT 14 BW3 -0.88 RF11 SpecialReport doc S/G Eddy Current Inspecbon Page 19 of 21

Table 4 Percent of Wall-Thickness Penetrations for S/G #2 Row Column Indication %TW Support Location 105 59 PCT 11 BW5 0.89 105 85 PCT 14 BW6 -0.69 105 141 PCT 13 BW4 0.96 105 143 PCT 17 BW3 1.04 105 143 PCT 19 09H -0.84 105 143 PCT 12 BW6 -0.71 106 94 PCT 11 BW9 0.55 106 116 PCT 16 BW7 -1.04 107 51 PCT 8 BW7 -0.63 107 55 PCT 22 BW5 0.94 107 55 PCT 19 BW6 -0.94 107 55 PCT 17 BW5 0.28 108 74 PCT 15 BW3 -0.7 109 141 PCT 18 BW5 0.91 110 48 PCT 10 BW3 1.1 110 78 PCT 14 BW6 -0.9 113 109 PCT 28 BW3 0.79 114 42 PCT 13 BW7 0.72 114 54 PCT 21 BW7 0.99 114 106 PCT 15 BW4 -0.09 114 112 PCT 13 BW3 0.86 115 109 PCT 12 BW8 0.77 117 39 PCT 17 BW5 -0.83 117 89 PCT 12 BW4 -0.73 119 45 PCT 20 BW4 -0.83 119 67 PCT 17 09C 0.08 119 139 PCT 11 BW1 -0.4 121 111 PCT 16 BW7 0.73 123 115 PCT 12 08C -0.88 125 83 PCT 10 BW4 0.34 125 133 PCT 12 BW4 -0.77 127 125 PCT 13 06C -0.91 130 50 PCT 9 BW5 -0.71 133 61 PCT 20 BW5 0.74 133 61 PCT 8 BW3 0.58 133 87 PCT 9 BW6 0.94 133 117 PCT 17 BW3 0.88 134 52 PCT 13 BW1 1.15 135 113 PCT 20 BW8 0.03 137 61 PCT 11 09C -0.87 137 65 PCT 10 BW5 -1 137 111 PCT 16 BW8 -0.53 138 64 PCT 11 BW7 0.82 141 69 PCT 12 BW7 0.52 141 75 PCT 20 BW1 1.58 142 68 PCT 22 10C -0.25 142 100 PCT 10 BW2 -0.81 143 67 PCT 20 BW8 0.61 143 103 PCT 13 BW9 1.63 RFI1 SpecialReport doc S/G Eddy Current Inspection Page 20 of 21

-i Table 4 Percent of Wall-Thickness Penetrations for S/G #2 Row Column Indication %TW Support Location 144 86 PCT 22 BW1 1.53 144 88 PCT 6 BW9 1.72 144 100 PCT 7 BW9 -1.85 144 106 PCT 8 BW1 -1.85 144 106 PCT 40 BW1 1.95 144 106 PCT 14 BW1 -1.61 145 77 PCT 23 BW8 -0.97 145 77 PCT 19 BW1 1.47 145 83 PCT 22 BW1 1.62 145 85 PCT 13 BW7 0.91 145 85 PCT 23 BW8 -0.91 145 85 PCT 9 BW1 -1.92 145 85 PCT 24 BW8 0.92 145 85 PCT 19 BW9 -1.54 145 87 PCT 9 BW9 -1.8 145 89 PCT 18 08C -1.03 145 89 PCT 20 BW7 -0.97 145 89 PCT 19 BW4 -0.92 145 89 PCT 22 BW8 0.92 145 89 PCT 33 BW8 -0.75 145 95 PCT 18 BW8 0.86 145 95 PCT 30 BW8 -0.86 145 101 PCT 21 BW3 0.94 145 103 PCT 29 BW9 -1.7 146 78 PCT 13 BW9 -1.5 146 78 PCT 27 BW9 1.58 146 80 PCT 21 BW9 1.42 146 80 PCT 21 BW9 1.42 146 82 PCT 27 BW1 1.51 146 84 PCT 18 BW9 1.62 146 88 PCT 30 BW1 1.59 146 88 PCT 30 BW9 1.53 146 90 PCT 15 BW9 1.53 147 81 PCT 22 09H 0.75 147 85 PCT 14 BW1 -1.55 147 85 PCT 21 BW6 0.92 147 85 PCT 27 BW7 0.78 147 87 PCT 34 BW8 0.03 147 87 PCT 27 BW2 -0.73 147 87 PCT 22 BW7 -0.87 147 87 PCT 26 BW8 -0.87 147 87 PCT 19 BW7 0.53 147 91 PCT 30 BW8 -0.95 147 91 PCT 24 BW8 0.86 RF11 SpecialReport doc S/G Eddy Current Inspection Page 21 of 21

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