WM 04-0046, Results of the Twelfth Steam Generator Tube Inservice Inspection

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Results of the Twelfth Steam Generator Tube Inservice Inspection
ML043080306
Person / Time
Site: Wolf Creek Wolf Creek Nuclear Operating Corporation icon.png
Issue date: 10/27/2004
From: Muench R
Wolf Creek
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
WM 04-0046
Download: ML043080306 (34)
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Text

WNLF CREEK 'NUCLEAR OPERATING CORPORATION Richard A Muench President and Chief Executive Officer October 27, 2004 WM 04-0046 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Subject:

Docket No. 50-482: Results of the Twelfth Steam Generator Tube Inservice Inspection Gentlemen:

The attached Steam Generator Tube Inspection Report is submitted in accordance with Wolf Creek Generating Station (WCGS) Technical Specification 5.6.10.b. This report provides the results of Wolf Creek Generating Station's twelfth steam generator tube inservice inspection.

The Steam Generator Tube Inspection Report includes the number and extent of tubes inspected, location and percent of wall-thickness penetration for each indication of an imperfection, and identification of tubes plugged. Attachment 1 provides the Steam Generator Tube Inspection Report.

No commitments are contained in this correspondence.

If you have any questions concerning this matter, please contact me at (620) 364-4000, or Mr.

Kevin Moles at (620) 364-4126.

Very truly yours, RichardA. Muench RAM/rIg Attachment cc: J. N. Donohew (NRC), w/a D. N. Graves (NRC), w/a B. S. Mallett (NRC), w/a Senior Resident Inspector (NRC), w/a 4"?

-0 %-./ni P.O. Box 411 / Burlington, KS 66839 / Phone: (620) 364.8831 An Equal Opportunity Employer M/FiHCVET to WM 04-0046 Page 1 of 33 STEAM GENERATOR TUBE INSPECTION REPORT This report is being submitted pursuant to Technical Specification 5.6.10.b to report the results of the twelfth steam generator tube inservice inspection. Additional information established by NEI 97-06, uSteam Generator Program Guidelines," is also included with this report.

Summary The twelfth steam generator tube inservice inspection was completed by Westinghouse Electric Corporation on October 31, 2003, during Refueling Outage 13. Section 1 of this report describes the inspection programs, which were completed in Steam Generators "A" and "D" including: 100% bobbin coil except the U-bend portion of row 1 and row 2, 55% Rotating Pancake Coil (RPC) top of tube sheet on the hot leg side, 50% RPC row 1 and 2 U-bends, and a special interest program. The inspection results, which include the location and percent of wall-thickness penetration for each indication of an imperfection, are listed in Section 2 of this report.

Mechanical plugging was necessary due to indications found during the inservice inspection.

Of the 5600 tubes inspected in Steam Generator "A", three tubes were plugged due to anti-vibration bar (AVB) wear indications that exceeded the 40 percent through wall Technical Specification acceptance criteria. Sixteen of the 5546 tubes inspected in Steam Generator "D" were plugged due to AVB wear indications that exceeded the 40 percent through wall Technical Specification acceptance criteria. In addition, one tube in Steam Generator "D"was plugged due to an obstruction in the tube. Identification of tubes plugged, as well as the total number and percentage of tubes plugged to date for each steam generator, is included in Section 3 of this report.

The results of the twelfth steam generator tube inservice inspection have been classified as Category C-2. Category C-2 is defined in Technical Specification 5.5.9 as inspection results that indicate "one or more tubes, but not more than 1% of the total tubes inspected are defective, or between 5% and 10% of the total tubes inspected are degraded tubes." Steam Generator "A" had 0.05 percent defective tubes and 1.50 percent degraded tubes. Steam Generator "D"had 0.31 percent defective tubes and 2.72 percent degraded tubes.

to WM 04-0046 Page 2 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Technical Specification Required Reports Section 1: Number and Extent of Tubes Inspected.

A. Steam Generator "A": A total of 5600 tubes were inspected B. Steam Generator UD": A total of 5546 tubes were inspected Steam Steam Test Extent Generator A Generator D Bobbin Full Length 5356 5302 Bobbin Cold Leg Straight Length 244 244 Bobbin Hot Leg Straight Length 244 244 RPC Hot Leg Top of Tubesheet (+/- 3 inches) 3281 3240 RPC Row 1 and 2 U-bends 122 122 A Special Interest +Point RPC program included all bobbin "I" codes (signals that were new or changed after historical review). All 5.00 volts or greater dents on the hot leg side were examined. A 5% sample of 'H" codes and 5% sample of "S" codes were examined. The UH" codes are primarily due to manufacturing burnish mark (MBM) signals and small (<2 volt) dent signals that have rotated into the flaw plane. These are resolved by history look-back and are monitored to ensure characteristics are not changing. The "s" codes are signals that have been +Point examined for diagnostic purposes at some previous time and were then determined to be non-degradation. These signals are tracked to detect signal change and are resolved by history look-back. RPC examinations were also performed to track Flow Distribution Baffle wear indications. None of the freespan or support plate indications tested with RPC were reported as degradation.

The following are the indication totals for each special interest category.')

Indication/Signals Description SG A SG D DNG Freespan Ding (Total/>5V) 185/48 244/60 DNT Dents at Structures (Total/>5V) 354/127 149/53(Z)

FSH/FSS Freespan signals history / RPC (Includes 601/9 580/2 burnish marks)

PCT AVB% Wear Indications (Bobbin Sizing) 430 72313' PLP Possible Loose Parts 6(4) 4)

PVN Permeability Variation 2 3 VOL Volumetric Indications - +Point 1 5 WAR Wear (non-crack like) at FDB 0 18

1. Numbers may differ from EC database due to duplicate entries in database
2. Includes DDS (distorted dent cleared by +Point)
3. Excludes PCT calls for volumetric indications other than AVB wear
4. All from +Point, involving 5 tubes
5. Five indications are in the database, 4 from bobbin, I from +Point. The +Point PLP is interpreted as the same indication as the bobbin indication on the tube.

to WM 04-0046 Page 3 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Section 2: Location and Percent of Wall Thickness Penetration for Each Indication of an Imperfection.

The following tables contain all tubes inspected that had a percent through wall loss indication.

The key below provides a description of the abbreviations used in the following tables.

  1. H, #C (# = number) of Support Plate(s) Hot Leg or Cold Leg Side AV# Anti-Vibration Bar (# = number)

TSH Tube Sheet Hot Leg FBC Flow Baffle Cold Leg to WM 04-0046 Page 4 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 25 8 11 AV6 0.02 27 10 10 AV5 -0.22 30 10 15 AV5 -0.06 38 19 14 AV4 0.03 40 20 14 AV5 0.00 39 25 16 AV2 0.06 45 25 22 AV2 0.00 45 25 21 AV4 0.03 45 25 31 AV5 -0.16 30 26 12 AV6 -0.08 45 26 24 AV3 -0.06 45 26 25 AV4 -0.11 48 27 14 AV4 0.05 48 27 13 AV5 0.00 38 29 17 AV2 0.00 38 29 14 AV3 0.00 45 30 20 AV2 0.09 45 30 23 AV3 0.00 45 30 18 AV5 -0.03 50 30 12 - AV5 -0.05 41 31 19 AV4 0.08 44 31 17 AV4 0.08 41 32 11 AV2 -0.12 41 32 19 AV3 0.00 41 32 16 AV4 -0.11 45 32 15 AV2 -0.09 45 32 23 AV3 -0.20 45 32 34 AV4 0.00 45 32 26 AV5 -0.22 45 32 17 AV6 -0.08 47 32 17 AV2 -0.06 47 32 33 AV3 0.00 47 32 25 AV4 -0.08 47 32 14 AV5 -0.05 34 33 17 AV4 0.03 45 33 25 AV4 0.21 50 34 17 AV2 0.11 48 35 15 AV4 -0.03 48 35 21 AV5 0.03 33 36 18 AV2 0.17 33 36 15 AV3 0.00 33 36 10 AV4 0.00 35 36 16 AV5 0.00 45 36 21 AV2 0.00 to WM 04-0046 Page 5 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 36 37 13 AV3 0.11 45 37 19 AV2 0.00 45 37 25 AV3 0.00 45 37 15 AV4 0.00 45 37 13 AV6 -0.19

48. 37 16 AV3 0.08 30 38 16 AV5 0.30 30 38 10 AV6 0.00 40 38 17 AV4 0.00 43 38 17 AV2 -0.15 43 38 35 AV3 0.23 43 38 18 AV4 0.03 43 38 15 AV5 -0.19 45 38 18 AV3 0.12 48 38 11 TSH -0.08 39 39 18 AV3 0.00 39 39 20 AV5 -0.14 44 39 18 AV2 0.20 44 39 16 AV3 -0.06 44 39 31 AV4 -0.11 44 39 23 AV5 0.00 38 40 16 AV2 0.11 38 40 18 AV3 0.00 41 40 15 AV2 0.00 41 40 16 AV5 0.00 41 40 19 AV6 0.05 44 40 13 AV3 0.00 45 40 18 AV3 -0.09 45 40 23 AV4 -0.03 46 40 28 AV2 0.08 46 40 33 AV4 0.11 46 40 28 AV5 0.05 27 41 21 AV2 0.17 27 41 23 AV5 0.06 28 41 17 AV2 0.08 28 41 17 AV5 0.14 38 41 28 AV3 0.00 38 41 23 AV4 -0.14 40 41 18 AV3 0.03 40 41 17 AV4 -0.16 44 41 26 AV5 0.25 44 41 19 AV6 -0.14 45 41 17 AV2 0.09 45 41 33 AV3 0.00 to WM 04-0046 Page 6 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 45 41 28 AV4 0.00 45 41 24 AV5 0.03 45 41 21 AV6 0.08 27 42 17 AV5 0.08 30 42 15 AV2 0.03 36 42 19 AV2 0.03 36 42 16 AV3 -0.20 36 42 17 AV4 -0.03 36 42 19 AV5 0.05 40 42 16 AV3 0.14 40 42 22 AV4 0.00 40 42 15 AV5 0.00 56 42 12 AV6 0.00 28 43 18 AV2 0.00 36 43 23 AV2 -0.06 41 43 16 AV3 0.03 41 43 14 AV4 -0.03 41 43 23 AV5 0.00 41 43 17 AV6 0.19 56 43 11 AV3 0.11 56 43 12 AV5 -0.08 57 43 11 AV5 -0.08 35 44 13 AV5 0.00 38 44 12 AV5 0.00 41 44 15 AV2 -0.03 41 44 22 AV3 0.00 41 44 18 AV4 0.45 41 44 14 AV5 0.00 44 44 35 AV2 0.00 44 44 27 AV3 0.00 44 44 24 AV4 0.00 44 44 27 AV5 0.00 44 44 23 AV6 0.21 28 45 27 AV5 0.06 28 45 19 AV6 0.03 35 45 18 AV1 0.00 35 45 21 AV2 0.00 36 45 23 AV2 -0.06 36 45 18 AV3 -0.14 36 45 19 AV4 -0.08 36 45 25 AV5 -0.14 36 45 23 AV6 0.08 37 45 17 AV6 0.00 39 45 33 AV4 0.19 to WM 04-0046 Page 7 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 40 45 15 AV3 0.23 40 45 16 AV4 0.05 41 45 17 AV6 -0.08 43 45 13 AV3 0.32 44 45 20 AV3 -0.03 44 45 15 AV4 -0.11 44 45 16 AV5 -0.08 56 45 14 AV4 0.16 26 46 15 AV2 0.00 28 46 26 AV5 -0.30 28 46 16 AV6 0.00 38 46 18 AV1 0.00 38 46 16 AV2 0.00 38 46 17 AV3 0.00 38 46 36 AV4 0.00 39 46 28 AV2 0.00 39 46 20 AV3 0.00 39 46 19 AV4 -0.05 40 46 35 AV2 0.00 40 46 41 AV3 0.00 40 46 38 AV4 0.21 40 46 40 AV5 0.00 40 46 19 AV6 0.00 43 46 13 AV2 0.00 43 46 14 AV3 0.08 43 46 30 AV4 0.00 43 46 13 AV5 -0.05 44 46 16 AV2 0.19 44 46 18 AV3 0.22 44 46 17 AV4 -0.05 44 46 15 AV5 0.00 50 46 20 AV3 -0.03 34 47 24 AV2 0.17 34 47 20 AV3 0.00 34 47 24 AV5 -0.08 36 47 11 AV3 -0.09 37 47 20 AV3 -0.06 37 47 28 AV4 0.27 37 47 20 AV5 -0.14 39 47 13 AV2 -0.20 39 47 14 AV4 -0.03 39 47 13 AV5 -0.05 40 47 17 AV1 -0.14 40 47 28 AV2 -0.06 to WM 04-0046 Page 8 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 40 47 30 AV3 -0.11 40 47 23 AV4 0.00 40 47 15 AV5 0.05 44 47 17 AV2 -0.09 58 47 10 AV3 0.00 36 48 18 AV5 0.00 37 48 16 AV2 0.00 38 48 26 AV2 0.00 38 48 23 AV3 0.08 38 48 16 AV4 0.00 38 48 15 AV5 0.16 40 48 18 AV5 0.00 22 49 16 AV2 -0.09 30 49 18 AV1 0.25 30 49 41 AV2 0.23 30 49 36 AV5 0.25 36 49 21 AV2 0.17 36 49 15 AV3 0.00 36 49 19 AV4 0.05 40 49 17 AV2 -0.17 40 49 18 AV3 -0.28 40 49 10 AV4 -0.27 57 49 11 AV6 0.00 36 50 16 AV2 0.11 36 50 18 AV3 -0.11 36 50 20 AV4 0.03 36 50 16 AV5 0.19 36 50 12 AV6 -0.35 38 50 18 AV4 0.16 39 50 15 AV4 0.03 27 51 12 AV5 -0.17 35 51 15 AV1 -0.12 49 51 27 AV2 0.14 49 51 21 AV4 -0.03 49 51 23 AV5 -0.05 49 51 14 AV6 -0.05 38 52 20 AV3 -0.03 38 52 18 AV4 -0.11 38 52 14 AV5 0.13 40 52 19 AV2 0.36 40 52 16 AV3 0.00 40 52 21 AV4 0.08 40 52 28 AV5 0.16 40 52 17 AV6 -0.13 to WM 04-0046 Page 9 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 43 52 18 AV2 0.00 33 53 18 AV2 -0.06 34 53 17 AV2 -0.15 40 53 14 AV3 0.00 42 53 18 AV2 -0.15 42 53 24 AV5 0.00 49 53 16 AV5 0.08 49 53 14 AV6 -0.05 35 54 18 AV2 0.03 36 54 22 AV3 0.23 36 54 11 AV6 0.00 41 54 24 AV5 -0.13 42 54 21 AV5 0.05 18 55 18 AV1 0.19 38 55 20 AV2 0.09 38 55 28 AV3 0.00 38 55 30 AV4 0.00 42 55 12 AV4 0.00 35 56 17 AV2 -0.03 44 56 20 AV2 0.25 44 56 25 AV3 0.00 44 56 22 AV4 0.03 44 56 19 AV5 0.03 19 58 18 AV1 0.00 31 58 17 AV2 -0.11 40 58 14 AV2 0.06 40 58 34 AV3 0.03 40 58 17 AV4 0.00 40 58 28 AV5 0.00 40 58 12 AV6 -0.05 41 58 23 AV2 0.00 41 58. 20 AV3 0.06 43 58 28 AV2 0.25 43 58 20 AV3 0.12 43 58 20 AV4 0.08 43 58 16 AV5 -0.08 39 59 16 AV5 0.11 41 59 19 AV2 0.12 41 59 25 AV3 0.00 41 59 19 AV4 0.00 44 59 23 AV2 0.33 44 59 22 AV3 0.25 44 59 15 AV6 0.00 40 60 38 AV3 0.00 to WM 04-0046 Page 10 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 40 60 27 AV4 0.00 40 60 24 AV5 0.00 44 60 21 AV3 0.11 44 60 18 AV4 0.03 44 60 14 AV5 -0.11 34 61 23 AV4 0.00 42 61 20 AV2 0.27 36 63 12 AV2 -0.11 36 63 13 AV3 0.00 37 64 17 AV2 0.06 37 64 15 AV3 0.00 37 64 15 AV4 0.00 57 64 19 AV2 -0.09 51 66 19 AV2 -0.09 49 68 18 AV2 0.00 49 68 15 AV3 0.00 40 70 26 AV3 0.00 40 70 22 AV4 0.00 40 70 14 AV5 0.00 40 70 11 AV6 0.00 50 70 27 AV2 0.00 27 71 13 AV2 0.00 37 74 13 AVI -0.41 37 74 29 AV3 -0.05 37 74 29 AV4 0.00 37 74 27 AV5 -0.05 37 74 10 AV6 0.00 39 75 17 AV3 0.06 40 75 26 AV1 0.14 40 75 13 AV2 0.32 40 75 27 AV3 0.14 40 75 18 AV4 -0.34 40 75 28 AV5 -0.19 41 75 17 AV2 -0.29 41 75 18 AV3 0.03 41 75 16 AV4 0.05 41 75 27 AV5 -0.11 41 75 14 AV6 -0.40 42 75 17 AVI -0.17 44 75 16 AV3 0.00 44 75 14 AV4 0.13 44 75 19 AV5 -0.03 44 75 16 AV6 -0.37 39 76 23 AV2 -0.32 to WM 04-0046 Page 11 of33

  • I --

STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 50 76 26 AV2 0.00 50 76 25 AV3 0.00 50 76 46 AV4 0.00 50 76 37 AV5 0.00 44 77 19 AV4 0.05 58 77 11 AV6 -0.05 34 78 16 AV2 -0.06 34 78 14 AV3 0.00 34 78 20 AV5 0.08 39 78 17 AV3 0.00 39 79 15 AV3 0.11 39 79 21 AV4 0.05 39 79 13 AV5 0.03 39 79 15 AV6 0.13 27 80 16 AV5 0.03 34 80 12 AV1 0.28 34 80 18 AV2 -0.03 39 80 24 AV2 -0.08 39 80 25 AV3 0.03 39 80 25 AV4 0.08 39 80 18 AV5 0.03 39 80 38 AV6 0.13 40 80 17 AV2 0.03 39 81 19 AV2 -0.03 39 81 18 AV4 0.13 39 81 18 AV5 -0.03 44 81 15 AV2 0.14 48 81 23 AV2 0.17 48 81 18 AV3 -0.28 48 81 17 AV4 0.13 48 81 37 AV5 -0.24 56 81 14 AV5 0.03 27 82 17 AV5 0.03 40 82 16 AV2 0.00 40 82 13 AV3 0.00 40 82 13 AV4 0.00 40 82 15 AV5 0.00 36 83 20 AVI -0.03 46 83 17 AVI 0.00 46 83 19 AV2 -0.06 34 84 19 AV3 0.00 39 84 10 AV1 0.00 39 84 30 AV2 0.14 39 84 32 AV3 0.17 to WM 04-0046 Page 12 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 39 84 22 AV4 0.10 39 84 24 AV5 0.10 39 84 22 AV6 -0.21 53 84 14 AV5 0.10 39 85 19 AV2 0.09 39 85 33 AV3 0.06 39 85 35 AV4 0.03 39 85 25 AV5 -0.13 39 85 18 AV6 0.03 54 85 17 AV5 -0.03 25 86 14 AV5 0.05 31 86 22 AV5 0.00 46 86 15 AV1 0.11 46 86 14 AV2 -0.08 30 87 18 AV5 -0.16 39 87 14 AV2 0.03 39 87 29 AV4 0.00 39 87 17 AV6 0.05 44 87 15 AV2 0.00 50 87 19 AV4 -0.03 50 87 22 AV5 0.03 20 88 14 AV6 0.00 30 88 19 AV2 0.14 30 88 16 AV5 0.23 44 89 18 AV3 0.03 44 89 24 AV4 0.08 44 89 20 AV5 0.13 44 89 21 AV6 0.11 53 89 17 AV3 0.00 50 90 29 AV5 0.00 35 91 13 AV1 0.00 35 91 22 AV4 -0.11 36 91 20 AV2 -0.03 36 91 24 AV4 -0.20 36 91 11 AV5 -0.14 36 91 17 AV6 -0.11 41 91 15 AV6 0.00 35 92 16 AV3 0.05 36 92 11 AV2 -0.08 36 92 17 AV5 -0.26 44 92 18 AV4 -0.14 39 93 13 AV2 -0.21 39 93 28 AV3 -0.26 39 93 16 AV5 0.22 to WM 04-0046 Page 13 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "A" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 39 94 14 AV5 -0.03 20 95 14 AV6 0.03 38 95 15 AV4 0.06 38 95 19 AV5 -0.11 39 95 16 AV3 0.00 39 95 19 AV4 -0.08 39 95 12 AV5 -0.14 39 96 16 AV3 -0.16 39 96 17 AV4 -0.03 27 97 18 AV2 0.00 35 97 17 AV4 0.06 37 97 12 AV3 0.03 37 97 15 AV5 -0.03 38 98 18 AV3 -0.03 38 98 24 AV4 -0.17 38 99 23 AV4 -0.03 37 100 12 AV3 0.00 37 100 15 AV4 0.29 45 100 11 AV1 -0.05 45 100 13 AV2 0.08 45 100 15 AV3 0.00 45 100 15 AV4 0.00 39 101 12 AV3 0.08 39 101 17 AV4 -0.20 39 101 10 AV5 0.06 40 102 17 AV3 0.03 40 102 17 AV4 -0.06 40 102 16 AV5 0.00 44 102 11 AV1 0.03 43 103 14 AV3 -0.16 36 110 13 AV3 0.00 36 110 24 AV4 -0.17 36 110 30 AV5 0.00 36 110 17 AV6 -0.14 to WM 04-0046 Page 14 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" i Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 27 8 10 AV1 0.00 27 8 16 AV6 0.00 29 10 13 AV1 0.00 29 10 11 AV2 -0.46 29 10 21 AV5 0.03 30 10 15 AV2 -0.17 30 10 23 AV5 0.00 32 11 14 AV2 0.00 32 11 18 AV6 -0.13 33 11 19 AV2 -0.06 33 11 13 AV5 0.00 33 11 17 AV6 0.03 32 12 17 AV5 0.00 32 12 11 AV6 0.00 33 12 16 AV2 0.00 33 12 27 AV4 0.00 33 12 26 AV5 0.00 33 12 13 AV6 0.00 33 13 24 AV4 0.00 33 13 23 AV5 0.00 33 13 36 AV6 0.00 34 13 31 AV3 0.00 32 14 16 AV4 0.00 32 14 12 AV5 0.00 33 14 15 AV2 0.00 33 14 16 AV3 0.00 33 14 18 AV4 0.00 35 14 16 AV5 0.00 33 15 16 AV4 0.00 35 15 12 AV4 0.00 36 15 21 AV5 0.40 36 16 25 AV4 0.14 36 16 12 AV5 0.43 37 16 15 AV3 0.12 37 16 20 AV4 0.08 37 16 18 AV5 -0.06 37 16 15 AV6 0.00 38 16 13 AV3 0.00 38 16 19 AV4 0.10 35 17 22 AV2 0.06 35 17 24 AV3 0.00 37 17 10 AV3 0.06 37 17 26 AV4 0.00 37 17 20 AV5 0.00 37 17 18 AV6 0.00 to WM 04-0046 Page 15 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 38 17 13 AV4 -0.03 37 18 15 AV4 -0.03 38 18 14 AV4 0.14 38 18 11 AV5 0.00 38 18 10 AV6 0.17 39 18 15 AV2 0.00 39 18 16 AV3 -0.06 33 19 15 AV3 0.00 37 19 14 AVI 0.00 37 19 24 AV3 0.00 37 19 15 AV4 0.00 38 19 15 AVI 0.03 38 19 25 AV3 0.00 38 19 14 AV4 0.00 38 19 12 AV5 0.37 38 19 15 AV6 0.00 39 19 29 AV2 0.00 39 19 23 AV3 0.00 39 19 21 AV5 0.00 39 19 20 AV6 0.00 40 19 13 AV2 -0.11 40 19 10 AV4 0.00 41 19 15 AVI 0.12 41 19 38 AV2 0.00 41 19 29 AV3 0.00 41 19 22 AV4 0.00 41 19 26 AV5 0.43 41 19 19 AV6 0.00 37 20 13 AV2 0.09 39 20 16 AV2 0.00 39 20 27 AV3 0.00 40 20 18 AV4 0.03 40 20 14 AV6 -0.06 41 20 19 AV3 -0.03 41 20 29 AV4 0.09 41 20 34 AV5 -0.17 41 20 25 AV6 0.17 31 21 9 TSH 0.08 37 21 17 AV2 0.21 38 21 21 AV2 0.00 38 21 16 AV4 -0.06 39 21 15 AV3 0.00 40 21 11 AV4 -0.06 41 21 18 AV5 0.03 38 22 19 AV3 -0.03 to WM 04-0046 Page 16 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 41 22 22 AV2 0.09 41 22 26 AV3 0.09 41 22 25 AV5 0.00 41 22 19 AV6 -0.03 42 22 18 AV5 0.06 38 23 17 AV5 0.00 38 23 16 AV6 0.00 40 23 17 AV5 0.00 43 23 17 AV1 0.00 43 23 20 AV2 0.03 43 23 38 AV4 0.00 43 23 32 AV5 -0.03 43 23 24 AV6 0.37 39 24 19 AV4 0.06 39 25 16 AV3 0.06 39 25 12 AV5 0.00 43 25 16 AV2 0.09 43 25 26 AV3 -0.09 43 25 25 AV4 0.00 43 25 13 AV5 0.06 43 25 19 AV6 -0.09 44 25 21 AV3 -0.38 44 25 21 AV4 -0.03 44 25 18 AV5 0.34 45 25 13 AV2 0.00 45 25 21 AV3 0.15 45 25 34 AV5 0.09 45 25 32 AV6 0.06 46 25 19 AV1 0.09 46 25 20 AV2 -0.12 46 25 37 AV3 0.03 46 25 28 AV4 0.00 46 25 23 AV5 0.06 47 25 22 AV4 -0.10 37 26 19 AV2 0.06 41 27 15 AV4 0.00 41 27 14 AV5 0.00 43 27 17 AV2 0.03 43 27 30 AV3 -0.15 43 27 17 *AV5 0.03 43 27 16 AV6 -0.06 44 27 13 AV4 0.06 49 27 24 AV4 0.06 42 28 17 AV2 0.06 42 28 14 AV3 0.00 to WM 04-0046 Page 17 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 45 28 15 AV2 0.12 45 28 17 AV3 0.06 45 28 26 AV5 -0.03 45 28 19 AV6 0.00 47 28 21 AV5 0.00 48 28 15 AV5 0.03 49 28 18 AV4 0.00 49 28 39 .AV5 0.09 49 28 38 AV6 0.09 1 29 7 FBC -0.25 1 29 7 FBH 0.25 44 29 18 AV3 0.00 49 29 15 AV2 0.13 49 29 18 AV4 -0.05 49 29 15 AV6 0.05 1 30 6 FBC 0.31 46 30 17 AV3 -0.12 49 30 32 AV2 0.03 49 30 32 AV3 0.03 49 30 14 AV4 -0.09 49 30 19 AV5 0.09 49 30 22 AV6 0.06 50 30 20 AV6 -0.06 1 31 7 FBC 0.34 1 31 6 FBH 0.25 46 31 11 AV1 0.00 46 31 19 AV2 0.00 46 31 23 AV3 -0.15 46 31 29 AV4 0.09 46 31 24 AV5 0.00 47 31 25 AV5 0.00 49 31 18 AV3 0.00 49 31 22 AV5 0.00 49 31 18 AV6 0.00 50 31 16 AV4 0.00 32 8 FBC -0.20 1

32 5 FBH 0.03 32 32 14 AV3 0.15 47 32 21 AV4 0.06 47 32 23 AV5 0.09 49 32 19 AV3 0.09 49 32 13 AV4 0.00 50 32 18 AV2 0.09 50 32 15 AV3 -0.03 50 32 24 AV4 0.06 to WM 04-0046 Page 18 of 33

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STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 50 32 20 AV5 0.03 1 33 7 FBC 0.22 1 33 6 FBH 0.25 37 33 14 AV2 0.00 37 33 23 AV3 0.00 47 33 13 AV3 0.06 47 33 18 AV4 0.00 47 33 16 AV5 0.00 47 33 15 AV6 0.00 48 33 13 AV3 -0.06 48 33 15 AV4 0.00 52 33 16 AV6 0.00 33 34 15 AV5 0.00 35 34 13 AV3 -0.06 48 34 27 AV2 0.06 48 34 27 AV3 0.00 48 34 17 AV5 -0.09 45 35 16 AV2 0.03 53 35 21 AV3 0.00 53 35 22 AV5 0.00 54 35 14 AV5 -0.03 43 36 13 AV4 -0.11 39 37 17 AV2 0.06 39 37 21 AV3 0.14 39 37 21 AV4 -0.08 39 37 15 AV5 0.06 41 37 16 AV4 0.19 49 37 10 AV2 -0.12 49 37 19 AV3 0.09 49 37 16 AV4 0.17 49 37 14 AV6 -0.04 51 37 16 AV2 0.06 52 37 26 -AV1 0.00 52 37 27 AV1 0.03 52 37 66 AV2 0.00 52 37 56 AV2 0.00 52 37 53 AV3 0.00 52 37 44 AV3 0.00 52 37 57 AV4 0.00 52 37 66 AV4 0.00 52 37 26 AV5 0.00 52 37 25 AV5 -0.14 52 37 17 AV6 0.08 52 37 19 AV6 0.00 43 38 21 AV2 0.03 to WM 04-0046 Page 19 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 43 38 24 AV4 -0.03 43 38 18 AV5 0.08 46 38 18 AV3 0.03 49 38 14 AV5 0.00 45 39 13 AV3 0.00 46 39 13 AV5 -0.03 48 39 16 AV2 0.09 48 39 15 AV3 0.00 48 39 32 AV4 0.14 48 39 22 AV5 0.22 48 39 12 AV6 0.08 49 39 11 AV3 0.00 52 39 13 AV3 0.28 52 39 21 AV4 0.25 52 39 18 AV5 0.11 38 40 28 AV2 0.00 38 40 18 AV4 0.11 41 40 19 AV3 0.42 41 40 18 AV4 0.06 39 41 16 AV2 0.23 39 41 17 AV3 0.00 39 41 13 AV4 -0.11 39 41 12 AV5 -0.03 42 41 13 AV2 0.00 42 41 25 AV3 0.00 42 41 17 AV4 0.11 42 41 16 AV5 0.11 42 41 17 AV6 0.03 51 41 20 AVI 0.00 51 41 18 AV2 0.00 51 41 24 AV3 0.00 37 42 21 AV4 0.00 41 42 17 AV4 0.06 43 42 14 AV5 -0.17 45 42 16 AV2 0.06 47 42 19 AV4 0.00 47 42 24 AV5 0.25 47 42 18 AV6 0.17 39 43 20 AV2 0.21 39 43 32 AV3 0.00 39 43 34 AV4 0.00 39 43 21 AV5 -0.17 41 43 34 AV2 0.00 41 43 30 AV3 0.00 41 43 14 AV4 0.25 to WM 04-0046 Page 20 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 41 43 15 AV5 0.36 43 43 18 AV2 0.00 45 43 20 AV3 -0.18 45 43 25 AV4 -0.28 45 43 20 AV5 0.25 45 43 16 AV6 0.14 42 44 20 AV4 -0.03 42 44 16 AV5 0.03 43 44 24 AV2 0.00 43 44 28 AV3 -0.09 33 45 10 AV4 0.08 37 45 16 AV1 0.00 37 45 36 AV2 0.00 37 45 20 AV3 0.00 37 45 20 AV4 0.06 37 45 15 AV5 0.17 46 45 13 AV3 0.00 46 45 12 AV4 0.06 44 46 15 AV2 -0.12 44 46 21 AV5 0.08 45 46 17 AV2 0.21 45 46 16 AV3 0.18 45 46 19 AV6 0.08 41 47 23 AV2 0.00 41 47 12 AV3 -0.26 41 47 12 AV4 -0.19 41 47 16 AV6 0.06 50 47 14 AV4 0.00 50 47 15 AV5 0.19 50 47 11 AV6 0.08 44 48 18 AV5 0.00 44 49 10 AV4 0.03 44 49 18 AV5 -0.03 44 49 13 AV6 0.03 49 49 18 AV2 -0.09 50 49 26 AV2 0.00 50 49 24 AV2 0.00 50 49 50 AV3 -0.09 50 49 48 AV3 0.00 50 49 42 AV4 -0.06 50 49 39 AV4 0.00 50 49 24 AV5 0.00 50 49 26 AV5 -0.03 50 49 19 AV6 -0.19 50 49 19 AV6 0.00 to WM 04-0046 Page 21 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 58 49 18 AVI 0.27 40 50 21 AV3 0.08 40 50 22 AV4 0.02 40 50 25 AV5 0.19 48 50 16 AV1 0.00 48 50 32 AV3 -0.03 48 50 31 AV4 0.00 48 50 32 AV5 0.06 51 50 12 AV1 0.00 52 50 13 AV2 0.00 52 50 15 AV3 0.00 52 50 15 AV5 0.00 50 51 31 AV2 -0.06 50 51 17 AV4 0.03 50 51 13 AV5 -0.11 50 51 10 AV6 -0.28 41 52 16 AV2 0.00 41 52 13 AV3 0.00 41 52 18 AV4 0.00 44 52 16 AV2 0.00 52 52 22 AV2 0.00 52 52 20 AV3 0.00 25 53 12 AV2 0.03 25 53 12 AV5 -0.22 36 53 15 AV2 -0.26 37 53 12 AV4 -0.17 37 53 18 AV5 0.03 33 54 16 AV2 0.00 35 54 15 AV3 0.00 35 54 18 AV4 0.00 35 54 20 AV5 0.00 45 54 23 AV2 0.00 45 54 30 AV3 0.00 45 54 22 AV4 0.00 45 54 26 AV5 0.00 45 54 14 AV6 0.00 39 55 18 AV1 -0.11 39 55 16 AV4 -0.06 41 55 19 AV3 -0.03 41 55 21 AV4 -0.14 45 55 15 AV2 0.00 45 55 15 AV3 0.00 45 55 26 AV4 0.03 48 55 16 AV3 -0.03 49 55 16 AV2 0.20 to WM 04-0046 Page 22 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 49 55 22 AV3 0.00 49 55 42 AV4 0.00 49 55 32 AV5 0.08 49 55 21 AV6 0.00 50 55 40 AV2 -0.06 50 55 21 AV3 0.00 50 55 20 AV4 -0.17 50 55 21 AV5 -0.06 34 56 29 AV2 0.00 34 56 32 AV5 0.00 44 56 17 AV6 0.00 45 56 18 AV1 0.00 45 56 28 AV2 0.00 45 56 26 AV3 0.00 45 56 31 AV4 0.00 45 56 24 AV5 0.00 45 56 14 AV6 0.00 50 56 15 AV2 0.00 50 56 28 AV3 0.00 50 56 33 AV4 0.00 50 56 22 AV5 0.00 35 58 12 AV2 0.20 50 58 11 AV3 0.20 50 58 11 AV4 0.06 50 58 14 AV5 0.36 50 58 12 AV6 0.00 45 59 17 AVI -0.40 45 59 23 AV2 0.03 45 59 19 AV3 0.00 45 59 39 AV4 -0.03 45 59 32 AV5 0.11 45 59 17 AV6 -0.11 50 59 15 AV2 0.00 50 59 15 AV4 0.00 50 59 14 AV5 0.28 50 59 14 AV6 0.06 35 60 27 AV5 0.00 48 60 12 AV2 -0.46 48 60 34 AV3 0.06 48 60 29 AV4 0.08 48 60 25 AV5 0.08 48 60 26 AV6 0.06 33 61 17 AV2 0.00 33 61 16 AV3 0.00 35 61 13 AV2 0.00 to WM 04-0046 Page 23 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 35 61 21 AV3 0.00 44 61 14 5H -0.55 44 61 19 AV3 0.00 44 61 16 AV4 0.00 49 61 46 AV2 0.00 49 61 29 AV3 0.00 49 61 16 AV4 0.17 50 62 23 AVI 0.31 50 62 44 AV2 -0.03 50 62 40 AV3 0.03 50 62 47 AV4 0.00 50 62 23 AV5 -0.11 50 62 15 AV6 -0.22 55 62 28 AV1 0.06 55 62 26 AV2 0.09 33 64 17 AV2 -0.28 33 64 12 AV3 -0.14 33 64 21 AV4 -0.08 33 64 13 AV5 -0.33 41 64 22 AV3 -0.09 41 64 10 AV4 -0.08 41 64 16 AV5 0.14 41 64 20 AV5 -0.44 53 64 12 AV1 -0.09 53 64 12 AV2 -0.06 56 64 12 AVI -0.03 15 65 14 5H 0.00 41 65 30 AVI 0.00 41 65 30 AV1 0.00 41 65 30 AV2 0.00 41 65 26 AV2 0.00 41 65 47 AV3 0.00 41 65 43 AV3 0.00 41 65 50 AV4 0.00 41 65 50 AV4 0.00 41 65 48 AV5 0.00 41 65 47 AV5 0.00 41 65 27 AV6 0.00 41 65 29 AV6 0.00 48 65 22 AVI 0.14 48 65 24 AV2 0.00 48 65 43 AV3 0.00 48 65 44 AV4 0.00 48 65 37 AV5 0.14 48 65 33 AV6 -0.11 to WM 04-0046 Page 24 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 31 66 18 AV2 0.20 33 66 14 AV2 -0.06 33 66 13 AV3 -0.12 41 66 16 AV2 -0.09 41 66 21 AV3 0.00 41 66 25 AV4 -0.14 41 66 25 AV5 -0.11 41 66 24 AV6 -0.19 45 66 35 AV2 -0.06 45 66 20 AV3 -0.11 45 66 35 AV4 -0.11 45 66 40 AV5 -0.14 45 66 16 AV6 -0.06 44 67 16 AV2 0.00 34 68 13 AV2 0.14 40 68 14 AV2 0.19 46 68 27 AV2 0.15 46 68 18 AV3 -0.03 31 69 10 AV1 -0.09 31 69 15 AV5 0.06 48 69 10 AV1 0.00 48 69 43 AV2 0.00 48 69 41 AV3 -0.34 48 69 10 AV4 0.00 48 69 14 AV5 0.08 48 69 11 AV6 -0.06 52 69 11 AVI 0.00 44 70 16 AVI 0.03 44 70 20 AV2 0.11 44 70 13 AV3 0.00 44 70 16 AV5 0.08 44 70 16 AV6 0.22 46 70 22 AV2 0.12 50 70 19 AV2 -0.14 50 70 17 AV3 0.29 57 70 12 AV5 0.00 36 71 35 AVI 0.06 36 71 26 AV2 0.00 36 71 25 AV3 0.15 36 71 20 AV4 -0.08 36 71 23 AV5 0.13 36 71 17 AV6 0.16 49 71 35 AV4 0.19 49 71 22 AV5 0.19 32 72 26 AVI 0.00 to WM 04-0046 Page 25 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 32 72 16 AV5 -0.14 36 73 15 AV2 0.25 36 73 19 AV5 0.19 39 74 14 AV3 0.00 44 74 29 AVI 0.00 44 74 25 AV2 0.00 44 74 23 AV3 0.26 44 74 15 AV4 0.00 44 74 42 AV5 0.05 44 74 20 AV6 0.00 45 74 12 AV1 0.00 45 74 14 AV2 -0.06 48 74 26 AV2 0.09 39 75 11 AV2 -0.11 39 75 15 AV3 0.00 39 75 13 AV5 0.00 44 75 18 AV2 -0.03 46 75 38 AV2 0.00 46 75 17 AV3 0.34 46 75 47 AV4 0.00 46 75 15 AV5 0.11 50 75 38 AV2 0.00 50 75 31 AV3 0.00 50 75 21 AV4 -0.06 50 75 30 AV5 0.00 36 76 13 AV1 0.06 36 76 16 AV2 0.00 45 76 15 AVI 0.12 45 76 15 AV2 0.15 45 76 16 AV3 0.12 45 76 34 AV4 0.03 45 76 14 AV5 0.00 45 76 14 AV6 0.00 52 76 14 AV2 0.17 57 76 11 AV4 0.00 57 76 19 AV5 -0.03 39 77 16 AV1 0.08 39 77 26 AV2 0.08 39 77 21 AV3 -0.03 39 77 15 AV4 0.11 39 77 31 AV5 0.16 39 77 14 AV6 0.00 44 77 16 AV3 0.17 39 78 26 AV3 0.00 41 78 16 AV2 -0.24 to WM 04-0046 Page 26 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 46 78 20 AV2 0.29 50 78 14 AV2 0.00 50 78 16 AV3 0.00 28 79 10 AV2 0.28 28 79 12 AV5 0.00 33 79 11 AV5 -0.17 39 79 17 AV2 0.00 42 79 12 AV3 0.00 36 80 17 AV3 0.00 36 80 17 AV4 0.00 39 80 21 AV2 0.00 39 80 19 AV4 0.00 50 80 16 AV2 -0.03 37 81 14 AV3 0.14 37 81 11 AV4 0.14 43 81 14 AV2 0.26 43 81 24 AV3 0.09 43 81 10 AV4 -0.17 43 81 13 AV5 -0.08 45 81 20 AV2 0.00 45 81 33 AV3 -0.03 45 81 22 AV4 -0.17 45 81 13 AV5 0.17 47 81 14 AV3 0.00 49 81 25 AV2 0.03 51 81 19 AV2 0.00 51 81 17 AV4 0.10 51 81 16 AV5 -0.03 24 82 11 AV6 -0.17 43 82 16 AV2 -0.06 43 82 20 AV4 -0.11 45 82 27 AV3 0.00 49 82 20 AV2 0.00 39 83 29 AV3 0.00 39 83 20 AV4 -0.03 40 83 16 AV3 0.00 48 83 10 AV2 0.25 48 83 10 AV4 0.08 20 84 18 AV6 -0.05 32 84 10 AV3 0.00 41 84 19 AVI 0.00 41 84 27 AV3 0.00 41 84 18 AV4 0.00 41 84 18 AV5 0.00 46 84 30 AV3 0.00 to WM 04-0046 Page 27 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 46 84 18 AV4 0.00 35 85 13 AV3 0.09 35 85 14 AV4 -0.14 45 85 22 AV2 0.25 45 85 40 AV3 0.00 45 85 29 AV4 -0.33 45 85 19 AV5 0.00 45 85 17 AV6 0.03 49 85 27 AV2 0.28 49 85 13 AV4 0.11 49 85 13 AV5 0.03 50 85 21 AV4 0.06 50 85 18 AV5 0.08 50 85 10 AV6 0.03 40 87 15 AVI 0.31 40 87 17 AV2 -0.14 40 87 16 AV3 0.11 40 87 32 AV4 0.08 47 87 11 AV1 -0.03 50 87 13 AV4 0.06 50 87 15 AV5 0.08 20 88 16 AV1 0.23 38 88 19 AV2 0.00 38 88 15 AV3 0.00 45 88 16 AV3 0.18 45 88 22 AV4 0.00 45 88 30 AV5 0.00 53 88 15 AV2 0.00 36 89 17 AV3 -0.14 38 89 21 AV3 0.09 38 89 25 AV4 0.03 38 89 17 AV5 0.08 48 89 33 AV3 0.00 48 89 12 AV4 0.11 48 89 20 AV5 0.06 50 89 20 AV3 0.00 1 90 5 FBC 0.00 1 90 6 FBH 0.18 36 90 16 AV3 -0.09 36 90 12 AV4 0.00 36 90 15 AV6 -0.13 39 90 13 AV2 0.11 42 90 38 AV4 0.00 42 90 48 AV5 0.00 45 90 20 AV3 0.00 to WM 04-0046 Page 28 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 53 90 22 AV4 0.00 53 90 27 AV5 0.00 53 90 17 AV6 0.08 1 91 5 FBC -0.31 1 91 6 FBH 0.26 32 91 17 AV5 -0.16 49 91 27 AV2 0.06 1 92 6 FBC -0.31 1 92 6 FBH 0.00 40 92 19 AVI 0.00 40 92 20 AV3 -0.11 40 92 17 AV5 0.00 43 92 24 AV3 -0.08 45 92 12 AV3 -0.03 45 92 16 AV4 -0.03 45 92 17 AV5 -0.03 49 92 21 AV2 0.09 49 92 20 AV4 0.03 49 92 17 AV5 0.06 1 93 8 FBC 0.36 45 93 19 AV3 0.03 45 93 25 AV4 0.00 45 93 22 AV5 0.21 1 94 5 FBC 0.36 1 94 7 FBH 0.33 41 94 31 AV2 0.14 41 94 29 AV3 0.06 41 94 25 AV4 0.00 41 94 21 AV5 -0.03 41 94 10 AV6 0.00 43 94 27 AV2 0.09 43 94 16 AV3 -0.03 43 94 17 AV4 0.00 43 94 22 AV5 -0.03 44 94 17 AV3 -0.03 38 95 23 AV2 -0.06 41 95 17 AV2 0.17 41 95 12 AV4 0.13 41 95 16 AV5 0.00 44 95 19 AV3 -0.08 45 95 14 AV2 -0.11 45 95 13 AV3 0.08 45 95 29 AV4 0.00 45 95 34 AV5 0.00 45 95 15 AV6 0.00 to WM 04-0046 Page 29 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 41 96 14 AV2 0.00 41 96 20 AV3 -0.03 44 96 19 AV2 -0.06 44 96 26 AV3 -0.08 44 96 16 AV4 -0.11 45 96 19 AV2 -0.06 45 96 26 AV5 -0.11 27 97 9 TSH -0.64 38 97 16 AV5 0.06 40 97 20 AV3 0.06 40 97 22 AV4 0.08 41 97 27 AV3 0.14 41 97 34 AV4 0.16 46 97 18 AV3 0.17 40 98 20 AV2 -0.06 40 98 23 AV3 0.06 40 98 12 AV4 0.16 47 98 27 AV2 0.06 47 98 40 AV3 0.00 47 98 27 AV4 0.16 47 98 31 AV5 0.26 47 98 17 AV6 -0.05 38 99 23 AV2 0.00 38 99 19 AV3 0.00 43 99 16 AV5 -0.05 34 100 13 AV3 0.00 38 100 19 AV2 -0.11 38 100 15 AV3 0.11 41 100 26 AV2 0.00 41 100 25 AV3 0.03 41 100 25 AV4 0.08 41 100 19 AV5 0.14 42 100 22 AV4 0.05 36 101 15 AV2 0.00 38 101 24 AV3 -0.28 38 101 22 AV4 -0.17 40 102 30 AV3 0.00 40 102 23 AV4 0.00 34 103 11 AV6 0.00 36 103 11 AV3 -0.20 36 103 16 AV4 -0.08 38 103 16 AV3 -0.14 38 103 29 AV4 -0.03 38 103 17 AV5 0.00 40 103 21 AV2 0.00 to WM 04-0046 Page 30 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Tube Indications on Steam Generator "D" Indication Inch (+/-)

Row Column (% of Wall Thickness) Location From Location 40 103 27 AV3 0.00 40 103 24 AV4 -0.06 40 103 14 AV5 -0.14 40 103 14 AV6 -0.03 35 104 13 AV5 -0.17 38 104 12 AV3 0.00 40 104 35 AV2 0.00 40 104 23 AV3 -0.03 40 104 16 AV5 0.00 40 104 16 AV6 -0.36 35 105 12 AV6 0.00 38 105 35 AV3 -0.08 38 105 22 AV4 -0.08 34 106 13 AV4 -0.08 35 106 17 AV2 0.00 35 106 11 AV3 0.08 35 106 17 AV4 0.00 35 106 15 AV6 -0.44 35 107 18 AV3 0.00 35 107 20 AV4 0.03 35 107 16 AV5 0.00 35 108 24 AV4 0.05 35 108 11 AV5 0.00 35 108 16 AV6 0.00 32 109 14 AV5 -0.14 33 109 20 AV3 0.03 33 109 22 AV4 -0.58 33 109 24 AV5 -0.14 34 109 15 AV2 0.06 34 109 11 AV4 -0.19 34 109 12 AV6 -0.14 32 110 12 AV5 0.00 35 110 28 AV4 0.00 35 110 17 AV6 0.08 30 111 16 AV2 0.17 30 111 15 AV6 0.06 27 113 17 AV2 -0.03 30 114 37 AV5 0.05 24 115 16 AVI 0.03 26 115 13 AVI 0.00 27 115 13 AV6 -0.11 28 115 40 AV6 0.00 21 117 9 TSH 0.01 to WM 04-0046 Page 31 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Section 3: Identification of Tubes Plugged.

A. Steam Generator TAH:

New pluggable indication Row Column 40 46 30 49 50 76 B. Steam Generator uD":

New pluggable indication Row Column 52 37

  • 40 41 50 49 49 55 50 55 49 61 50 62 41 65 48 65 45 66 48 69 44 74 46 75 45 85 42 90 47 98 28 115
  • Tube (40,41) in Steam Generator contained an obstruction. This tube was further inspected with camera equipment but the obstruction could not be dislodged. This tube was administratively plugged.

Total number of Tubes Plugged in Each Steam Generator (this includes tubes plugged during pre-service inspections):

Steam Generator Total Number of Total Percentage Tubes Plugged Plugged A *29 0.52%

B 28 0.50%

C 19 0.34%

D 97 1.72%

  • An additional 3 plugs are installed in Steam Generator "A" cold leg only, due to tube sheet drilling mistakes during manufacturing. No tubes are installed in those locations.

to WM 04-0046 Page 32 of 33 STEAM GENERATOR TUBE INSPECTION REPORT Summary of Tube IntegritV Assessment The examination results confirm that the Wolf Creek steam generators currently meet all industry and regulatory structural and leakage integrity guidance.

The only operational degradation mechanisms observed during this examination was tube wear at the AVB intersections. Although wear due to loose parts was observed, this degradation depends specifically on the presence of foreign objects, and is not inherent to the operating conditions of the steam generators. A number of new AVB wear indications were found in both Steam Generators "A" and "D". AVB wear is an active degradation mechanism in Steam Generator "D"according to the definition of an active degradation mechanism in the EPRI PWR Steam Generator Examination Guidelines, Rev. 6.

One tube in Steam Generator "A"and three tubes in Steam Generator "D"were reported from the Top of Tube Sheet +Point program to have volumetric indications. All of the indications were sized using a qualified technique, with the largest indication being 11% through wall (TW).

These indications are judged to be the result of wear with previous foreign objects or due to manufacturing anomalies. No possible loose parts were associated with these indications.

Since the largest indication is much less than the conservative structural limit, the criteria for condition monitoring are met for top of tubesheet volumetric indications.

Eighteen indications of wear at the flow distribution baffle (FDB) intersections were observed in Steam Generator UD". Examination with the +Point probe showed that these indications were not crack-like. These indications have been previously observed, and lookback evaluation to Refueling Outage 11 data shows that there are no significant changes in the shape or size of the signal. The maximum reported depth from the sizing was 8% TW. Since the maximum indications plus the non-destructive examination (NDE) uncertainty is less than the structural limit, the requirements for condition monitoring are satisfied for wear at the FDB.

Indications of wear at a support plate location were reported in two tubes in Steam Generator "D" at the 5th support plate on the hot leg side. Originally reported as distorted support plate intersections from the bobbin program, these indications were examined with +Point to confirm the absence of cracking. The RPC examination concluded these indications were wear. A look-back evaluation indicated that these small bobbin signals were present at Refueling Outage 11 also, but not reported, and remain unchanged since that time. The indications are attributed to wear from foreign objects which are no longer resident at these positions. The maximum depth of these indications is 14% TW. Since the indication depth plus the sizing uncertainty is significantly less than the structural limit, the requirements for condition monitoring are met for these indications.

The obstruction in tube (40,41) in Steam Generator "D"was determined to be a remnant (bolt shank) of the split pin that failed just after Refueling Outage 12. The tube was removed from service with the obstruction still in place. Because of the location of the foreign object in the tube, and because the tube was removed from service, this tube does not represent a potential degradation mechanism because no significant driving forces for either mechanical vibration or corrosion exist.

All structural and leakage criteria are projected to be satisfied for Steam Generators "A"and "D" through, at least, end of cycle 15, when they will next be inspected. Based on the results of this to WM 04-0046 Page 33 of 33 STEAM GENERATOR TUBE INSPECTION REPORT inspection, Steam Generators "B" and UCn, which were not inspected during Refueling Outage 13, are projected to satisfy all structural and leakage criteria through, at least, end of cycle 14.

Steam Generators "B" and "C"will be next inspected at the end of cycle 14.

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