L-PI-13-052, 2012 180-Day Steam Generator Tube Inspection Report

2012 180-Day Steam Generator Tube Inspection Report

ML13172A344
Person / Time
Site:	Prairie Island
Issue date:	06/21/2013
From:	Jeffery Lynch Northern States Power Co, Xcel Energy
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
L-PI-13-052
Download: ML13172A344 (28)

Text

L-PI-13-052 TS 5.6.7 JUN 2 1 2013 U S Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Prairie Island Nuclear Generating Plant Unit 1 Docket 50-282 Renewed License No. DPR-42 2012 Unit 1 180-Day Steam Generator Tube Inspection Report In accordance with Prairie Island Nuclear Generating Plant, Unit 1 Technical Specification 5.6.7 "Steam Generator Tube Inspection Report", Northern States Power Company, a Minnesota corporation, doing business as Xcel Energy (hereafter "NSPM")

submits the enclosed report of steam generator tube inspections performed during the 2012 refueling and maintenance outage on Unit 1.

Summary of Commitments This letter contains no new commitments and no revisions to existing commitments.

j£4c.A-

/Jamed Lynch Site Vice President, Prairie Island Nuclear Generating Plant Northern States Power Company - Minnesota Enclosure cc: Administrator, Region III, USNRC Project Manager, Prairie Island, USNRC Resident Inspector, Prairie Island, USNRC 1717 Wakonade Drive East

• Welch, Minnesota 55089-9642 Telephone: 651.388.1121

ENCLOSURE 1 Prairie Island Nuclear Generating Plant - Unit 1 2012 Steam Generator Tube Inspection Report In accordance with Prairie Island Nuclear Generating Plant (PINGP), Unit 1 Technical Specification 5.6.7, Xcel Energy Nuclear Department submits this report of steam generator tube inspections performed during the 2012 refueling and maintenance outage for Unit 1 (1 R28).

PINGP Unit 1 has two Framatome Model 56/19 Replacement Steam Generators (RSGs) with approximately 5,600 square meters of heat transfer area utilizing tubes with 19 millimeter outside diameter. Each RSG has 4,868 thermally-treated Alloy 690 u-tubes manufactured by Sandvik which have an outside diameter of 0.750 inch and a nominal wall thickness of 0.043 inch. The tubes are configured in a square pitch of 1.0425 inches with 55 rows and 114 columns. The tube u-bends vary in radius from 2.7000 inches for a row 1 tube to 58.9950 inches for a row 55 tube. The tubes vary in length from 738.16 inches for row 1 tubes to 923.04 inches for row 55 tubes. Row 1 through row 9 tubes were subject to stress relieving following the bending process using the thermal treatment process for an additional 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> minimum soak time. The tubes were hydraulically expanded at each end for the full depth of the tubesheet with the expansion transition being between 0.079 inches and 0.236 inches below the secondary tubesheet face.

The tubesheet is low alloy steel 21 A6 inches thick with alloys 82 and 182 cladding 0.375" thick for an overall thickness of 21.835 inches. The tubes are supported by eight tube support plates (TSPs) and five anti-vibration bars (AVBs) intersecting tubes between 1, 3, 5, 7 and 9 times (see Figure 1). There is one straight bar that intersects all rows at the center of each bend, two 57 degree bars that intersect rows 13 through 55 and two 14 degree bars that intersect rows 25 through 55. In addition there are 24 peripheral tubes with nine staples (one at each AVB location) that carry the entire load of the complete AVB assembly. All TSPs are constructed from Type 410 stainless steel. The TSPs have a minimum thickness of 1.181 inch and have quatrefoil-shaped holes through which the tubes pass. The AVBs are constructed from Type 405 stainless steel and are rectangular in cross section (0.5 inch by 0.3 inch).

Each RSG is equipped with a Loose Parts Trapping Systems (LPTS), which is composed of screens at the top of the downcomer and at the top of the primary (cyclone) separators.

These screens (0.14" square mesh formed from 0.031" diameter wire), prevent foreign material from entering the steam generator tube area from the main feedwater and auxiliary feedwater systems (see Figure 1).

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~~:--.;;;Ifi'J:;L......----~. . ANTI-'lIBRA nON BAR I, (£0-00-0500 ORA "INti UPPERMOST Ts,o Figure 1 The original Westinghouse Model 51 Steam Generators (SGs) were replaced during the 2004 refueling outage after 25.75 EFPY of operation. During the 2006 refueling outage the first inservice inspection (100% full length bobbin) was conducted on the RSGs after accumulating the initial 1.36 EFPY of RSG operation. Based on the lack of a definitive root cause for TSP wear and only a single cycle growth rate trend for both AVB and TSP wear identified during 1R24, the Licensee conservatively elected to inspect the RSGs during 1R25 after an additional 1.62 EFPY of RSG operation (2.98 RSG cumulative EFPY).

Based on the inspection results of both 1R24 and 1R25, the Licensee elected to skip two inspections (1 R26 and 1R27) and perform a inspection of the RSGs during 1R28 after an additional 4.18 EFPY of RSG operation (7.16 RSG cumulative EFPY).

Italicized text represents technical specification excerpts. Each excerpt is followed by the appropriate information intended to address each specific NOTE: requirement and also includes additional details based on benchmarking previous submittals and Staff requests for additional information of peer Licensees. A legend of codes and field names is included at the end of the report.

T. S. 5.6.7 Steam Generator Tube Inspection Report

a. A report shall be submitted within 180 days after initial entry into MODE 4 following completion of an inspection performed in accordance with the Specification 5.5.8, Steam Generator (SG) Program.

Initial entry into MODE 4 occurred on December 26,2012, dictating submittal of this report on or before June 24, 2013.

The report shall include:

1. The scope of inspections performed on each SG, Table 1 and the notes that follow, provides the scope of inspections performed during 1R28.

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TABLE 1 SCOPE EXTENT TECHNIQUE SG 11 SG 12 Row 8 through 55 TEHTEC X-Probe<D 100% (4067) 100% (4064)

Row 1 through 7 TEH08H X-Probe<D 100% (798) 100% (798)

Row 1 through 7 TEC08C X-Probe<D 100% (798) 100% (798)

Row 1 AV5TEH Bobbin 100%(114) 100%(114)

Row 1 AV5TEC Bobbin 100% (114) 100% (114)

Row 2 through 7 TEH08C Bobbin 100% (684) 100% (684)

Speciallnterest~ Various MRPC 0.7% (33) 0.5% (23)

Post Plug Pull TSHTEC X-Probe<D N/A 100% (3)

Plug N/A Visual 100% (6) 100% (12)

Upper Internals N/A Visual 100% 100%

Top of Tubesheet~ N/A Visual 100% 100%

In-bundle N/A Visual -17% -17%

PLP<V FOSAR N/A Visual 100% (31) N/A Notes:

The scope of inspections is provided as a percentage of the open tubes (or plugs) followed by the total number of tests parenthetically where practical.

<D The X-Probe deployed contained both a standard bobbin coil and 16 coil array of transmit/receive coils.

~ Special Interest MRPC testing is intended to bridge the X-Probe technology with the previously employed +Point technology. The selection and percentage (number) of tubes was based on 1R25 Special Interest results.

Two cold leg plugs (R55C58 and R31 C1 04) installed in 1R24 for TSP wear and one cold leg plug (R52C61) installed in 1R25 for AVB wear were removed to identify growth of repeat indications seen in prior inspections and to identify any new indications to see how they compared against indications seen in in-service tubes.

Inspections of the upper internals included the visual inspections of J-Tubes, Feedwater Ring Helix, Primary (Moisture) Separators, Loose Parts Trapping screens, Downcomer Loose Parts Trapping System (LPTS) and wrapper position per NRC Generic Letter 97-06 and Prairie Island Unit 1 56/19 Replacement Steam Generator Operation and Maintenance Manual.

~ Tube lane and periphery of the tube bundle inspected using Camera Transporter System.

Random fiber-optic inspection of one out of every six columns.

<V Foreign Object Search and Retrieval of possible loose part (PLP) indications for evaluation and possible removal based on eddy current results (not necessary on SG 12).

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2. Active degradation mechanisms found, Primary Side Inspections - TSP wear and AVB wear were the only active degradation mechanisms found in both SGs during 1R28. The findings of the 1R28 steam generator examination are bounded by the behavior projected in the 1R25 operational assessment. In addition to none of AVB or TSP wear indications approaching the condition monitoring (eM) limit, the growth rates from 1R28 have decreased by approximately one-half or less (Average and Upper 95th) of the growth rates in 1R25 and the number of actual indications is less than the projected indications.

Secondary Side Inspections - No active degradation was found. However, the upper bundle inspection found numerous (approximately 1.5 pounds) machining remnants on the SG 11 Downcomer LPTS which were subsequently removed.

The top of tubesheet and in bundle FOSAR inspections in SG 11 found and removed 17 machining remnants that correlated with 28 eddy current PLP indications. Two (2) other eddy current PLP indications were confirmed to be sludge and one (1) PLP was not confirmed visually (nothing found). In adition, the upper bundle inspection found a few (approximately 1 ounce) machining remnants on the SG 12 Downcomer LPTS which were subsequently removed. The top of tubesheet and in bundle inspections in SG 12 found no additional machining remnants and no eddy current PLP indications were detected.

3. Nondestructive examination techniques utilized for each degradation mechanism, Table 2 and the notes that follow, provides the Electric Power Research Institute (EPRI) Examination Technique Specification Sheet (ETSS) (techniques) utilized during 1R28 for active, potential, non-degradation and unexpected degradation.

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TABLE 2 CLASSIFICATIONCD MECHANISM LOCATION TECHNIQUE<D Active Wear AVB 96004.1 Rev. 13 Active Wear TSP 96004.1 Rev. 13 Potential Wear Staple 96004.1 Rev. 13 Potential Wear PLP 27091.2 Rev. 0 Potential Wear Tube-to-Tube 27091.3 Rev. 0 Notes:

CD Active is synonymous with the term "existing" degradation that is found in the EPRI Steam Generator Integrity Assessment Guidelines. Therefore the classical definition applies (i.e., one indication equates to active).

<D In addition: 1) Bobbin ETSS's 96010.1 Rev. 7, 24013.1 Rev. 2 and 96007.1 Rev.

12 were site validated for use on non-degradation (MBMs, DNGs, PDSs and cold laps), 2) Bobbin ETSS's 96005.2 Rev. 9, 96001.1 Rev. 11 and 96007.1 Rev. 12 were site validated for unexpected pitting, wastage and outside diameter stress corrosion cracking (ODSCC) degradation, 3) +Point@ ETSS's 96910.1 Rev. 10 was site validated as an alternate wear sizing technique, 4) +Point@ ETSS's 21409.1 Rev. 7, 21410.1 Rev. 6, 20510.1 Rev. 7, 20511.1 Rev. 8 and 96511.2 Rev. 16 were site validated for unexpected ODSCC and primary water stress corrosion cracking (PWSCC) degradation and 5) X-Probe ETSS's 10413.2 Rev. 0,11956.1 Rev. 0, 11956.2 Rev. 0, 11956.3 Rev. 0, 11956.4 Rev. 0, 24998.1 Rev. 1, 20400.1 Rev. 5,20402.1 Rev. 5, 20403.1 Rev. 5, 20500.1 Rev. 4, 20501.1 Rev. 4, 20502.1 Rev. 4 and 20513.1 Rev. 3 were site validated for wear and unexpected pitting, ODSCC and PWSCC degradation.

4. Location, orientation (if linear), and measured sizes (if available) of service induced indications, Tables 3, 4, 5 and 6 provide the location, orientation and measured size of each reported TSP wear indication and each reported AVB wear indication in each steam generator respectively for the two active degradation mechanisms found during 1R28. All the tubes in these four tables were returned to service.

Tables 7 and 8 provide the location, orientation and measured sizes of AVB and TSP wear indications in each steam generator respectively for tubes preventively plugged during 1R28. The preventive tube plugging (PTP) criteria implemented during 1R28 for both AVB and TSP wear was.:::. 21 % for new indications and .:::.

23% for previous inservice indications. Table 8 also includes the plugging of three tubes (R55C58, R52C61 and R31 C1 04) that were unplugged on the cold leg to validate growth assumptions of plugged tubes.

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Within Tables 3 through 8, tubes reported with multiple VOL calls at the same ROW/COL/LOCATION confirm indications of double sided AVB wear or multiple wear location sites on multiple land contact points of Quatrefoil TSPs.

Conversely, single VOL calls confirm single sided wear sites at AVB and TSP locations. Tubes without a VOL entry were not confirmed by the array coil.

A legend of fields and codes with brief explanations is provided at the end of this enclosure for clarification purposes.

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TABLE 3 Steam Generator 11 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 1 1 3 1 0.16 14 04C 0.45 1 1 3 1 0.82 VOL 04C -0.37 0.61 0.98 1 2 3 1 0.08 7 05H -0.95 1 2 3 1 0.54 VOL 05H -0.95 -0.61 0.34 2 3 27 9 0.09 8 06C -0.59 2 3 27 9 0.45 VOL 06C -0.86 -0.56 0.30 3 4 32 12 0.13 11 06C -0.61 3 4 32 12 0.57 VOL 06C -0.93 -0.53 0.40 4 5 33 14 0.13 11 06C -0.64 4 5 33 14 0.48 VOL 06C -0.99 -0.53 0.46 5 6 34 14 0.14 12 06C -0.59 5 6 34 14 0.63 VOL 06C -0.94 -0.56 0.38 6 7 37 18 0.12 10 04H -0.83 6 7 37 18 0.57 VOL 04H -0.83 -0.51 0.32 7 8 38 19 0.13 11 06C -0.56 7 8 38 19 0.71 VOL 06C -0.99 -0.45 0.54 8 9 42 23 0.11 10 06C -0.54 8 9 42 23 0.76 VOL 06C -0.99 -0.54 0.45 9 10 38 27 0.13 11 06C -0.62 9 10 38 27 0.78 VOL 06C -0.94 -0.62 0.32 10 11 8 28 0.10 9 06C -0.56 10 11 8 28 0.42 VOL 06C -0.99 -0.56 0.43 11 12 48 29 0.09 8 08H -1.01 11 12 48 29 0.58 VOL 08H -1.03 -0.58 0.45 12 13 50 37 0.19 15 02H 0.27 12 13 50 37 0.52 VOL 02H 0.24 0.64 0.40 12 14 50 37 0.16 13 04H -0.88 12 14 50 37 0.46 VOL 04H -1.04 -0.16 0.88 13 15 51 37 0.18 15 02H 0.29 13 15 51 37 0.49 VOL 02H 0.19 0.64 0.45 14 16 50 38 0.11 9 04H -0.83 14 16 50 38 0.84 VOL 04H -0.88 -0.56 0.32 15 17 51 38 0.16 14 02H 0.32 15 17 51 38 0.44 VOL 02H 0.19 0.59 0.40 16 18 49 39 0.16 13 04H 0.21 16 18 49 39 0.48 VOL 04H 0.16 0.59 0.43 17 19 51 39 0.12 11 04H -0.88 17 19 51 39 0.43 VOL 04H -0.99 -0.40 0.59 17 20 51 39 0.13 11 06H -0.85 17 20 51 39 0.55 VOL 06H -0.99 -0.59 0.40 18 21 52 39 0.16 14 04H 0.29 18 21 52 39 0.52 VOL 04H 0.24 0.64 0.40 19 22 51 40 0.16 13 02H 0.29 19 22 51 40 0.49 VOL 02H 0.29 0.61 0.32 19 23 51 40 0.13 11 08C -0.44 Page 7 of27

TABLE 3 Steam Generator 11 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 19 23 51 40 0.79 VOL 08C -0.97 -0.42 0.55 20 24 37 44 0.10 9 08C -0.58 20 24 37 44 0.69 VOL 08C -1.10 -0.58 0.52 21 25 51 44 0.07 7 05H -0.69 21 25 51 44 0.76 VOL 05H -0.83 -0.56 0.27 22 26 53 44 0.15 13 07H -0.96 22 26 53 44 0.87 VOL 07H -0.98 -0.58 0.40 23 27 20 45 0.13 11 04H -0.67 23 27 20 45 0.95 VOL 04H -0.91 -0.59 0.32 24 28 36 45 0.10 9 08C -0.65 24 28 36 45 0.58 VOL 08C -0.98 -0.63 0.35 25 29 52 46 0.08 7 05H -0.96 25 29 52 46 0.74 VOL 05H -0.96 -0.53 0.43 26 30 21 47 0.18 14 03H -0.64 26 30 21 47 0.68 VOL 03H -0.88 -0.54 0.34 27 31 23 47 0.15 12 03H -0.62 27 31 23 47 0.70 VOL 03H -0.88 -0.48 0.40 28 32 17 49 0.15 13 05H -0.75 28 32 17 49 0.90 VOL 05H -1.05 -0.59 0.46 29 33 19 49 0.18 15 05H -0.75 29 33 19 49 0.75 VOL 05H -1.00 -0.59 0.41 30 34 21 49 0.15 12 04H -0.77 30 34 21 49 1.17 VOL 04H -0.91 -0.53 0.38 31 35 52 49 0.10 9 07H -0.69 31 35 52 49 0.69 VOL 07H -0.94 -0.59 0.35 32 36 53 49 0.14 12 02H 0.53 32 36 53 49 0.53 VOL 02H 0.16 0.61 0.45 33 37 53 50 0.18 14 04H -0.61 33 37 53 50 1.05 VOL 04H -0.88 -0.40 0.48 34 38 54 50 0.13 11 05H -0.66 34 38 54 50 1.04 VOL 05H -0.88 -0.53 0.35 35 39 48 51 0.10 9 04H -0.77 35 39 48 51 0.62 VOL 04H -0.91 -0.59 0.32 36 40 53 51 0.08 7 03H -0.64 36 40 53 51 0.45 VOL 03H -0.85 -0.29 0.56 36 41 53 51 0.16 13 04H -0.72 36 41 53 51 0.64 VOL 04H -0.80 -0.56 0.24 36 41 53 51 0.76 VOL 04H -0.91 -0.35 0.56 36 42 53 51 0.07 7 05H 0.29 36 42 53 51 0.61 VOL 05H 0.08 0.53 0.45 37 43 54 51 0.12 11 04H -0.80 37 43 54 51 0.80 VOL 04H -0.93 -0.32 0.61 37 44 54 51 0.15 12 07H -0.67 37 44 54 51 0.88 VOL 07H -0.96 -0.56 0.40 38 45 53 52 0.08 8 03H -0.69 38 45 53 52 0.76 VOL 03H -0.82 -0.59 0.23 Page 8 of27

TABLE 3 Steam Generator 11 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 38 46 53 52 0.18 14 04H -0.72 38 46 53 52 1.02 VOL 04H -0.93 -0.56 0.37 38 47 53 52 0.10 9 06H -0.61 38 47 53 52 0.96 VOL 06H -0.88 -0.61 0.27 39 48 54 52 0.15 13 04H 0.40 39 48 54 52 0.63 VOL 04H -0.16 0.53 0.69 40 49 55 52 0.13 11 03H -0.64 40 49 55 52 0.96 VOL 03H -0.80 -0.35 0.45 40 50 55 52 0.12 11 07H -0.82 40 50 55 52 0.65 VOL 07H -0.95 -0.53 0.42 41 51 52 53 0.13 11 03H -0.43 41 51 52 53 0.31 VOL 03H -0.83 -0.40 0.43 41 52 52 53 0.13 11 04H -0.61 41 52 52 53 0.82 VOL 04H -0.85 -0.48 0.37 42 53 54 53 0.12 11 04H -0.75 42 53 54 53 0.57 VOL 04H -0.88 -0.61 0.27 43 54 55 53 0.16 13 04H -0.67 43 54 55 53 0.59 VOL 04H -0.96 -0.56 0.40 43 55 55 53 0.09 8 07H -0.96 43 55 55 53 0.65 VOL 07H -0.96 -0.59 0.37 43 55 55 53 0.89 VOL 07H -0.98 -0.59 0.39 44 56 48 54 0.15 12 03H -0.77 44 56 48 54 0.67 VOL 03H -0.85 -0.56 0.29 45 57 54 54 0.07 6 03H 0.43 45 58 54 54 0.15 13 04H -0.72 45 58 54 54 1.13 VOL 04H -0.88 -0.32 0.56 46 59 55 54 0.14 12 02H 0.48 46 59 55 54 0.43 VOL 02H 0.29 0.53 0.24 46 60 55 54 0.13 11 04H -0.61 46 60 55 54 1.13 VOL 04H -0.82 -0.32 0.50 46 61 55 54 0.06 6 08H -0.69 46 61 55 54 0.61 VOL 08H -0.94 -0.64 0.30 47 62 53 55 0.12 10 04H -0.64 47 62 53 55 0.60 VOL 04H -0.85 -0.56 0.29 48 63 54 55 0.11 10 03H 0.51 48 63 54 55 0.31 VOL 03H 0.21 0.48 0.27 48 64 54 55 0.09 8 04H -0.72 48 64 54 55 0.96 VOL 04H -0.91 -0.21 0.70 49 65 55 55 0.13 11 05C 0.35 49 65 55 55 0.55 VOL 05C 0.27 0.56 0.29 50 66 42 56 0.08 8 05H 0.40 50 66 42 56 0.27 VOL 05H 0.29 0.48 0.19 51 67 53 56 0.08 7 04H -0.74 51 67 53 56 0.68 VOL 04H -0.88 -0.61 0.27 52 68 54 56 0.06 5 01H -0.80 52 68 54 56 0.44 VOL 01H -0.69 0.08 0.77 Page 9 of27

TABLE 3 Steam Generator 11 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 52 69 54 56 0.10 9 02H 0.40 52 70 54 56 0.06 5 03H -0.82 52 71 54 56 0.14 12 04H -0.80 52 71 54 56 0.57 VOL 04H -0.93 -0.29 0.64 52 72 54 56 0.16 13 07H -0.77 52 72 54 56 0.76 VOL 07H -0.98 -0.59 0.39 53 73 55 57 0.09 8 04H -0.53 53 73 55 57 0.74 VOL 04H -0.86 -0.59 0.27 54 74 54 58 0.14 12 02C 0.42 54 74 54 58 0.48 VOL 02C 0.11 0.63 0.52 54 75 54 58 0.08 7 03H 0.43 54 76 54 58 0.13 11 04H -0.72 54 76 54 58 0.44 VOL 04H -0.96 -0.51 0.45 55 77 55 58 0.20 16 02H 0.40 55 77 55 58 0.63 VOL 02H 0.13 0.61 0.48 55 78 55 58 0.10 9 03H -0.64 55 78 55 58 0.72 VOL 03H -0.80 -0.29 0.51 55 79 55 58 0.12 11 04H -0.75 55 79 55 58 0.68 VOL 04H -0.88 -0.59 0.29 55 80 55 58 0.08 7 05H -0.85 55 80 55 58 1.03 VOL 05H -0.88 -0.56 0.32 56 81 44 59 0.11 10 04H -0.53 56 81 44 59 0.72 VOL 04H -0.93 -0.61 0.32 57 82 50 59 0.07 7 03H -0.35 57 82 50 59 0.63 VOL 03H -0.77 -0.53 0.24 58 83 54 59 0.13 11 01H -0.59 58 83 54 59 0.78 VOL 01H -0.69 0.13 0.82 58 84 54 59 0.14 12 04H -0.48 58 84 54 59 0.67 VOL 04H -0.91 -0.56 0.35 59 85 55 59 0.12 10 01H -0.53 59 85 55 59 0.62 VOL 01H -0.83 0.05 0.88 59 86 55 59 0.08 7 02H 0.67 59 87 55 59 0.08 7 07H -0.61 59 87 55 59 0.79 VOL 07H -1.09 -0.56 0.53 60 88 52 60 0.14 12 04H -0.80 60 88 52 60 0.51 VOL 04H -0.88 -0.45 0.43 61 89 54 60 0.18 14 02H 0.40 61 89 54 60 0.48 VOL 02H 0.13 0.64 0.51 61 90 54 60 0.12 10 04H -0.72 61 90 54 60 0.65 VOL 04H -0.88 -0.53 0.35 62 91 55 60 0.27 20 03H -0.64 62 91 55 60 1.03 VOL 03H -0.91 -0.11 0.80 62 92 55 60 0.06 6 07H -0.50 62 92 55 60 0.76 VOL 07H -0.98 0.03 1.01 63 93 34 61 0.09 8 06H -0.64 63 93 34 61 0.64 VOL 06H -1.01 -0.53 0.48 Page 10 of27

TABLE 3 Steam Generator 11 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 64 94 41 61 0.06 6 04H -0.56 64 94 41 61 0.63 VOL 04H -0.90 -0.61 0.29 65 95 55 61 0.13 11 03H -0.53 65 95 55 61 0.58 VOL 03H -0.85 -0.11 0.74 66 96 24 62 0.10 9 06H -0.75 66 96 24 62 0.90 VOL 06H -1.09 -0.53 0.56 67 97 54 62 0.14 12 04H -0.72 67 97 54 62 0.89 VOL 04H -0.91 -0.51 0.40 68 98 53 63 0.14 12 04H -0.53 68 98 53 63 0.41 VOL 04H -0.94 -0.43 0.51 69 99 54 63 0.15 13 02H 0.51 69 99 54 63 0.23 VOL 02H 0.27 0.51 0.24 69 100 54 63 0.16 13 03H -0.51 69 100 54 63 0.60 VOL 03H -0.88 -0.35 0.53 69 101 54 63 0.11 10 04H -0.59 69 101 54 63 0.56 VOL 04H -0.91 -0.53 0.38 70 102 55 63 0.14 12 02H 0.56 70 102 55 63 0.25 VOL 02H 0.32 0.61 0.29 71 103 47 64 0.16 13 03H 0.40 72 104 49 64 0.14 12 08C -0.80 72 104 49 64 0.55 VOL 08C -0.92 -0.50 0.42 73 105 53 64 0.11 10 04H -0.80 73 105 53 64 0.94 VOL 04H -0.93 -0.35 0.58 74 106 54 64 0.15 13 02H 0.40 74 106 54 64 0.59 VOL 02H 0.19 0.61 0.42 74 107 54 64 0.10 9 03H 0.32 74 107 54 64 0.52 VOL 03H 0.61 0.85 0.24 74 108 54 64 0.13 11 04H -0.67 74 108 54 64 0.89 VOL 04H -0.93 -0.27 0.66 74 109 54 64 0.14 12 08H -0.78 74 109 54 64 0.72 VOL 08H -0.99 -0.56 0.43 75 110 55 64 0.20 16 02C 0.34 75 110 55 64 0.43 VOL 02C 0.24 0.64 0.40 75 111 55 64 0.11 9 04H -0.56 75 111 55 64 0.66 VOL 04H -0.88 -0.59 0.29 76 112 47 65 0.14 12 04H -0.67 76 112 47 65 0.64 VOL 04H -0.93 -0.51 0.42 77 113 54 65 0.18 14 02C 0.45 77 113 54 65 0.42 VOL 02C 0.34 0.63 0.29 77 114 54 65 0.09 8 04H -0.56 77 114 54 65 0.99 VOL 04H -0.91 -0.37 0.54 78 115 48 66 0.19 15 03H -0.64 78 115 48 66 0.45 VOL 03H -0.85 -0.51 0.34 78 115 48 66 0.74 VOL 03H -0.85 -0.56 0.29 78 116 48 66 0.12 11 04H -0.80 78 116 48 66 0.52 VOL 04H -0.96 -0.53 0.43 Page 11 of27

TABLE 3 Steam Generator 11 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 79 117 32 67 0.13 11 04H 0.45 79 117 32 67 0.49 VOL 04H 0.08 0.56 0.48 80 118 53 67 0.16 13 02C 0.50 80 118 53 67 0.43 VOL 02C 0.13 0.66 0.53 80 119 53 67 0.12 10 08C -0.99 80 119 53 67 0.72 VOL 08C -0.81 -0.39 0.42 81 120 54 67 0.23 18 02C 0.32 81 120 54 67 0.55 VOL 02C 0.13 0.64 0.51 82 121 51 68 0.12 10 03H 0.43 83 122 53 68 0.24 18 02C 0.66 83 122 53 68 0.62 VOL 02C 0.21 0.71 0.50 84 123 54 68 0.15 13 02C 0.61 84 123 54 68 0.28 VOL 02C 0.32 0.56 0.24 84 124 54 68 0.09 8 06C -0.61 84 124 54 68 0.40 VOL 06C -0.91 -0.53 0.38 84 125 54 68 0.11 9 08C -0.86 84 125 54 68 0.60 VOL 08C -0.91 -0.50 0.41 84 126 54 68 0.08 7 08H -0.62 84 126 54 68 0.62 VOL 08H -1.00 -0.48 0.52 85 127 52 69 0.15 13 02C 0.50 85 127 52 69 0.53 VOL 02C 0.13 0.61 0.48 85 128 52 69 0.13 11 03C 0.43 86 129 27 70 0.15 13 04H -0.69 86 129 27 70 0.70 VOL 04H -0.91 -0.43 0.48 87 130 52 70 0.13 11 04H -0.75 87 130 52 70 0.61 VOL 04H -0.99 -0.53 0.46 87 131 52 70 0.08 7 08C -0.80 87 131 52 70 0.49 VOL 08C -0.94 -0.47 0.47 88 132 53 70 0.07 6 03H -0.80 88 132 53 70 0.18 VOL 03H -0.85 -0.61 0.24 89 133 40 71 0.17 14 04H 0.32 89 133 40 71 0.29 VOL 04H 0.24 0.42 0.18 90 134 53 71 0.13 11 08C -0.75 90 134 53 71 0.53 VOL 08C -0.91 -0.53 0.38 91 135 49 72 0.17 14 03H -0.88 91 135 49 72 0.25 VOL 03H -0.83 -0.64 0.19 91 135 49 72 0.58 VOL 03H -0.85 -0.61 0.24 91 136 49 72 0.14 12 08C -0.61 91 136 49 72 0.64 VOL 08C -1.06 -0.58 0.48 92 137 23 73 0.07 6 04H -0.65 92 137 23 73 0.26 VOL 04H -0.89 -0.59 0.30 93 138 50 73 0.10 9 03H 0.35 93 138 50 73 0.34 VOL 03H 0.35 0.53 0.18 94 139 49 75 0.13 11 04H -0.78 94 139 49 75 0.76 VOL 04H -0.94 -0.53 0.41 95 140 49 76 0.12 10 04H -0.43 Page 12 of27

TABLE 3 Steam Generator 11 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 95 140 49 76 0.65 VOL 04H -0.94 -0.54 0.40 96 141 49 77 0.16 13 04H -0.77 96 141 49 77 0.57 VOL 04H -0.93 -0.59 0.34 97 142 50 77 0.19 15 02C 0.48 97 142 50 77 0.43 VOL 02C 0.21 0.59 0.38 97 143 50 77 0.17 14 04H -0.69 97 143 50 77 0.86 VOL 04H -0.96 -0.59 0.37 98 144 51 77 0.24 18 02C 0.23 98 144 51 77 0.48 VOL 02C 0.26 0.71 0.45 98 145 51 77 0.12 10 03C 0.28 98 145 51 77 0.66 VOL 03C 0.34 0.54 0.20 99 146 51 78 0.20 16 02C 0.45 99 146 51 78 0.69 VOL 02C 0.03 0.63 0.60 100 147 46 79 0.10 9 04H 0.29 101 148 50 79 0.09 8 02C 0.58 101 148 50 79 0.24 VOL 02C 0.34 0.58 0.24 102 149 51 79 0.12 11 02C 0.66 102 149 51 79 0.40 VOL 02C 0.34 0.58 0.24 103 150 47 81 0.05 5 08C -0.52 103 150 47 81 0.47 VOL 08C -1.10 -0.58 0.52 104 151 46 82 0.08 7 08H -0.94 104 151 46 82 0.75 . VOL 08H -1.07 -0.56 0.51 105 152 49 82 0.17 14 02C 0.53 105 152 49 82 0.56 VOL 02C 0.11 0.69 0.58 106 153 48 84 0.18 15 03H -0.77 106 153 48 84 0.66 VOL 03H -0.91 -0.53 0.38 107 154 47 87 0.30 22 03H -0.69 107 154 47 87 0.70 VOL 03H -0.93 -0.43 0.50 108 155 44 88 0.09 8 04H -0.75 108 155 44 88 0.41 VOL 04H -0.83 -0.64 0.19 109 156 40 96 0.11 10 04H -0.72 109 156 40 96 0.70 VOL 04H -0.94 -0.37 0.57 110 157 27 106 0.08 7 06C -0.81 110 157 27 106 0.48 VOL 06C -0.89 -0.62 0.27 111 158 24 108 0.20 16 04C -0.59 111 158 24 108 0.68 VOL 04C -0.88 -0.54 0.34 112 159 21 109 0.06 5 04C -0.78 112 159 21 109 0.36 VOL 04C -0.88 -0.56 0.32 113 160 4 113 0.14 12 05C -0.75 113 160 4 113 0.45 VOL 05C -0.88 -0.53 0.35 Page 13 of27

TABLE 4 Steam Generator 12 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 1 1 11 4 0.17 14 03H -0.75 1 1 11 4 0.79 VOL 03H -0.91 -0.56 0.35 2 2 17 8 0.15 13 05C 0.56 2 2 17 8 0.33 VOL 05C 0.24 0.54 0.30 3 3 35 16 0.07 7 05C -0.37 3 3 35 16 0.51 VOL 05C -0.99 -0.61 0.38 4 4 42 25 0.13 11 05C -0.64 4 4 42 25 0.44 VOL 05C -0.93 -0.53 0.40 5 5 44 26 0.11 10 05C -0.50 5 5 44 26 0.41 VOL 05C -0.96 -0.56 0.40 6 6 46 26 0.21 16 04C -0.59 6 6 46 26 0.37 VOL 04C -0.85 -0.61 0.24 7 7 47 32 0.09 8 04H -0.88 7 7 47 32 0.41 VOL 04H -0.88 -0.64 0.24 8 8 48 34 0.14 12 04H -0.62 8 8 48 34 0.79 VOL 04H -0.91 -0.53 0.38 9 9 51 36 0.17 14 03H 0.45 9 9 51 36 0.85 VOL 03H 0.13 0.59 0.46 9 10 51 36 0.13 11 04H -0.59 9 10 51 36 0.46 VOL 04H -0.75 -0.48 0.27 9 11 51 36 0.08 7 05H 0.37 9 11 51 36 0.83 VOL 05H 0.11 0.56 0.45 10 12 50 38 0.16 13 03H -0.61 10 12 50 38 0.38 VOL 03H -0.83 -0.64 0.19 11 13 52 40 0.16 13 04H -0.61 11 13 52 40 0.84 VOL 04H -0.96 -0.51 0.45 12 14 51 41 0.23 17 04H 0.40 12 14 51 41 0.43 VOL 04H 0.27 0.51 0.24 12 15 51 41 0.09 8 06H -0.78 12 15 51 41 0.64 VOL 06H -0.96 -0.59 0.37 13 16 52 41 0.19 15 04H -0.67 13 16 52 41 0.77 VOL 04H -0.88 -0.48 0.40 14 17 29 43 0.17 14 03H 0.32 14 17 29 43 0.40 VOL 03H 0.32 0.61 0.29 15 18 52 44 0.17 14 08C -0.75 15 18 52 44 0.64 VOL 08C -1.03 -0.59 0.44 16 19 54 47 0.11 10 06H -0.67 16 19 54 47 0.81 VOL 06H -0.96 -0.56 0.40 17 20 54 48 0.17 14 04C 0.51 17 20 54 48 0.29 VOL 04C 0.29 0.48 0.19 18 21 54 51 0.16 13 08C -0.81 18 21 54 51 0.63 VOL 08C -1.00 -0.59 0.41 18 21 54 51 0.37 VOL 08C -1.05 -0.59 0.46 19 22 55 53 0.09 8 07C -0.72 19 22 55 53 0.50 VOL 07C -0.99 -0.53 0.46 20 23 55 55 0.13 11 02C -0.59 Page 14 of27

TABLE 4 Steam Generator 12 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 20 23 55 55 0.76 VOL 02C -0.77 -OAO 0.37 21 24 55 56 0.16 13 03C -0.61 21 24 55 56 0.40 VOL 03C -0.85 -0.61 0.24 22 25 53 57 0.13 11 08C -0.55 22 25 53 57 OA1 VOL 08C -1.01 -0.58 OA3 23 26 54 57 0.10 9 08C -OA1 23 26 54 57 OA6 VOL 08C -0.90 -0.66 0.24 24 27 55 57 0.15 13 01C -0.26 24 27 55 57 0.33 VOL 01C -0.61 -0.32 0.29 24 28 55 57 0.16 13 02C 0.64 24 28 55 57 0.67 VOL 02C -0.90 1.20 2.10 24 29 55 57 0.21 17 03C -OAO 24 29 55 57 0.78 VOL 03C -0.86 -OA6 OAO 24 30 55 57 0.15 12 04C -OA6 24 30 55 57 0.53 VOL 04C -0.86 -OA6 OAO 25 31 53 58 0.13 11 04C 0.59 25 31 53 58 0.26 VOL 04C 0.03 0.72 0.69 26 32 54 59 0.12 10 02C -0.29 26 32 54 59 OA3 VOL 02C -0.72 0.59 1.31 27 33 55 59 0.17 14 01C -0.37 27 33 55 59 0.23 VOL 01C -0.58 -0.40 0.18 27 34 55 59 0.11 9 04C -OA8 27 34 55 59 0.57 VOL 04C -0.83 -OAO OA3 28 35 53 60 0.16 13 05C 0.45 28 35 53 60 0.58 VOL 05C 0.27 0.59 0.32 29 36 54 60 0.16 13 01C -0.51 29 36 54 60 0.50 VOL 01C -0.67 0.16 0.83 30 37 55 60 0.15 13 01C -0.62 30 37 55 60 0.70 VOL 0iC -0.86 -0.05 0.81 30 38 55 60 0.22 17 02C OA8 30 38 55 60 0.99 VOL 02C -0.74 0.62 1.36 30 39 55 60 0.14 12 07C -0.75 30 39 55 60 0.70 VOL 07C -0.97 -0.56 0.41 31 40 55 61 0.17 14 05C 0.62 31 40 55 61 0.50 VOL 05C -0.21 0.64 0.85 32 41 55 62 0.13 11 02C 0.51 32 41 55 62 0.38 VOL 02C -0.58 0.61 1.19 33 42 54 63 0.17 14 04C 0.64 33 42 54 63 0.54 VOL 04C -0.29 0.61 0.90 34 43 52 64 0.17 14 04H -0.69 34 43 52 64 0.60 VOL 04H -0.91 -0.51 OAO 35 44 55 64 0.22 17 04C -0.64 35 44 55 64 0.79 VOL 04C -0.91 -0.59 0.32 36 45 54 65 0.13 11 04C -0.51 36 45 54 65 0.55 VOL 04C -0.94 -0.56 0.38 37 46 53 70 0.11 10 04H 0.27 37 47 53 70 0.12 10 08C -0.59 Page 15 of27

TABLE 4 Steam Generator 12 TSP Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 37 47 53 70 0.86 VOL 08C -0.97 -0.62 0.35 38 48 52 73 0.14 12 05C 0.59 38 48 52 73 0.57 VOL 05C 0.32 0.56 0.24 39 49 50 76 0.12 11 05C -0.45 39 49 50 76 0.44 VOL 05C -0.88 -0.48 0.40 40 50 50 77 0.14 12 04C -0.75 40 50 50 77 0.33 VOL 04C -0.85 -0.61 0.24 41 51 39 83 0.12 10 06H -0.59 41 51 39 83 0.79 VOL 06H -1.02 -0.56 0.46 42 52 36 97 0.15 13 03H -0.75 42 52 36 97 0.52 VOL 03H -1.09 -0.13 0.96 43 53 32 101 0.18 15 05C -0.48 43 53 32 101 0.52 VOL 05C -0.86 -0.59 0.27 44 54 33 102 0.11 10 04C -0.75 44 54 33 102 0.40 VOL 04C -0.88 -0.59 0.29 45 55 27 105 0.16 13 05C -0.59 45 55 27 105 0.86 VOL 05C -0.91 -0.56 0.35 46 56 25 106 0.12 10 04C -0.67 46 56 25 106 0.40 VOL 04C -0.96 -0.46 0.50 47 57 26 106 0.15 13 05C -0.78 47 57 26 106 0.90 VOL 05C -0.89 -0.54 0.35 48 58 25 107 0.19 15 04C -0.59 48 58 25 107 0.37 VOL 04C -0.83 -0.59 0.24 49 59 25 108 0.17 14 04C -0.53 49 59 25 108 0.65 VOL 04C -0.91 -0.48 0.43 50 60 11 111 0.07 7 06C -0.70 50 60 11 111 0.54 VOL 06C -0.86 -0.62 0.24 51 61 4 113 0.16 13 05C -0.72 51 61 4 113 0.50 VOL 05C -0.83 -0.59 0.24 Page 16 of27

TABLE 5 Steam Generator 11 AVB Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 1 1 51 41 0.16 6 AV3 -0.05 1 1 51 41 0.59 VOL AV3 -0.13 0.37 0.50 1 2 51 41 0.12 5 AV5 -0.03 1 2 51 41 0.61 VOL AV5 -0.11 0.35 0.46 2 3 52 41 0.09 3 AV5 -0.03 2 3 52 41 0.52 VOL AV5 -0.19 0.40 0.59 3 4 50 42 0.08 3 AV3 -0.19 4 5 42 45 0.36 12 AV2 -0.05 4 5 42 45 1.25 VOL AV2 -0.27 0.32 0.59 5 6 49 49 0.07 3 AV6 0.13 5 6 49 49 0.43 VOL AV6 -0.40 0.21 0.61 5 7 49 49 0.11 4 AV7 -0.11 5 7 49 49 0.61 VOL AV7 -0.48 0.03 0.51 6 8 49 53 0.13 5 AV5 -0.05 6 8 49 53 0.52 VOL AV5 -0.24 0.21 0.45 6 9 49 53 0.27 10 AV6 -0.05 6 9 49 53 1.36 VOL AV6 -0.35 0.19 0.54 6 10 49 53 0.12 4 AV7 -0.03 6 10 49 53 0.65 VOL AV7 -0.13 0.37 0.50 7 11 40 56 0.10 4 AV4 0.03 7 11 40 56 0.51 VOL AV4 -0.43 0.05 0.48 8 12 33 57 0.08 3 AV3 -0.03 8 12 33 57 0.85 VOL AV3 -0.35 0.24 0.59 8 13 33 57 0.10 4 AV4 -0.11 8 13 33 57 0.45 VOL AV4 -0.05 0.16 0.21 8 14 33 57 0.13 5 AV6 -0.05 8 14 33 57 0.39 VOL AV6 -0.51 -0.08 0.43 8 15 33 57 0.17 6 AV8 -0.05 8 15 33 57 0.58 VOL AV8 -0.13 0.29 0.42 8 16 33 57 0.22 8 AV9 -0.05 8 16 33 57 0.49 VOL AV9 -0.24 0.03 0.27 9 17 42 59 0.07 3 AV6 -0.08 9 17 42 59 0.50 VOL AV6 -0.51 -0.19 0.32 10 18 46 61 0.05 2 AV3 -0.11 10 18 46 61 0.48 VOL AV3 -0.38 0.03 0.41 10 19 46 61 0.12 5 AV4 -0.11 10 19 46 61 0.61 VOL AV4 -0.40 0.05 0.45 10 20 46 61 0.11 4 AV6 -0.08 10 20 46 61 0.41 VOL AV6 -0.13 0.21 0.34 11 21 40 62 0.11 4 AV7 -0.03 11 21 40 62 0.48 VOL AV7 -0.29 0.05 0.34 12 22 48 62 0.23 8 AV3 0.00 12 22 48 62 1.22 VOL AV3 -0.29 0.29 0.58 12 23 48 62 0.21 8 AV5 -0.05 12 23 48 62 0.66 VOL AV5 -0.37 0.16 0.53 12 24 48 62 0.12 5 AV6 -0.08 Page 17 of27

TABLE 5 Steam Generator 11 AVB Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 12 24 48 62 0.45 VOL AV6 -0.21 0.19 0.40 12 25 48 62 0.11 4 AV9 0.11 12 25 48 62 0.41 VOL AV9 -0.05 0.30 0.35 13 26 50 65 0.17 6 AV6 -0.03 13 26 50 65 0.63 VOL AV6 -0.62 0.00 0.62 13 27 50 65 0.18 7 AV7 -0.08 13 27 50 65 0.78 VOL AV7 -0.30 0.13 0.43 13 28 50 65 0.05 2 AV8 -0.22 13 28 50 65 0.15 VOL AV8 -0.38 -0.08 0.30 14 29 48 67 0.10 4 AV5 -0.24 14 29 48 67 0.91 VOL AV5 -0.32 0.21 0.53 Page 18 of27

TABLE 6 Steam Generator 12 AVB Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 1 1 12 35 0.13 5 AV5 -0.08 1 1 12 35 0.43 VOL AV5 -0.40 -0.03 0.37 2 2 51 42 0.14 5 AV4 -0.05 2 2 51 42 0.64 VOL AV4 -0.40 0.11 0.51 3 3 45 43 0.13 5 AV4 -0.08 3 3 45 43 0.57 VOL AV4 -0.37 0.13 0.50 4 4 50 45 0.16 6 AV7 0.03 4 4 50 45 0.75 VOL AV7 -0.32 0.27 0.59 5 5 49 46 0.07 3 AV3 -0.03 5 5 49 46 0.35 VOL AV3 -0.35 0.16 0.51 6 6 41 49 0.06 2 AV3 -0.16 6 6 41 49 0.18 VOL AV3 -0.29 -0.16 0.13 7 7 50 49 0.25 8 AV3 -0.08 7 7 50 49 0.98 VOL AV3 -0.37 0.27 0.64 7 8 50 49 0.16 6 AV5 -0.05 7 8 50 49 0.50 VOL AV5 0.00 0.16 0.16 8 9 42 50 0.08 3 AV4 -0.03 8 9 42 50 0.20 VOL AV4 -0.08 0.16 0.24 8 10 42 50 0.18 6 AV5 -0.05 8 10 42 50 0.44 VOL AV5 -0.24 0.16 0.40 8 10 42 50 0.38 VOL AV5 -0.27 0.13 0.40 9 11 48 50 0.22 8 AV3 -0.05 9 11 48 50 0.85 VOL AV3 0.03 0.19 0.16 9 12 48 50 0.17 6 AV4 -0.08 9 12 48 50 0.36 VOL AV4 -0.13 0.11 0.24 9 12 48 50 0.66 VOL AV4 -0.45 0.16 0.61 9 13 48 50 0.24 8 AV5 -0.05 9 13 48 50 1.25 VOL AV5 -0.43 0.21 0.64 9 14 48 50 0.24 9 AV6 -0.05 9 14 48 50 1.21 VOL AV6 -0.35 0.32 0.67 10 15 48 52 0.10 4 AV3 -0.05 10 15 48 52 0.35 VOL AV3 -0.24 0.05 0.29 11 16 35 53 0.20 7 AV1 -0.08 11 16 35 53 0.62 VOL AV1 -0.27 0.19 0.46 11 17 35 53 0.19 7 AV2 -0.05 11 17 35 53 0.64 VOL AV2 -0.40 0.29 0.69 11 18 35 53 0.29 10 AV3 0.00 11 18 35 53 1.15 VOL AV3 -0.29 0.29 0.58 11 19 35 53 0.13 5 AV4 -0.03 11 19 35 53 0.56 VOL AV4 -0.19 0.16 0.35 11 20 35 53 0.39 12 AV5 -0.05 11 20 35 53 1.61 VOL AV5 -0.48 0.19 0.67 11 21 35 53 0.15 5 AV6 -0.03 11 21 35 53 0.23 VOL AV6 -0.16 0.03 0.19 11 21 35 53 0.62 VOL AV6 -0.27 0.08 0.35 11 22 35 53 0.15 5 AV7 -0.03 Page 19 of27

TABLE 6 Steam Generator 12 AVB Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 11 22 35 53 0.18 VOL AV7 -0.16 0.03 0.19 11 22 35 53 OA1 VOL AV7 -0.29 0.13 OA2 11 23 35 53 0.20 7 AV8 -0.05 11 23 35 53 0.85 VOL AV8 -0.29 0.11 OAO 11 24 35 53 0.36 12 AV9 -0.05 11 24 35 53 0.26 VOL AV9 -0.19 0.11 0.30 11 24 35 53 1.03 VOL AV9 -0.29 0.17 OA6 12 25 47 53 0.15 5 AV5 0.00 12 25 47 53 0.38 VOL AV5 -0.24 0.05 0.29 12 26 47 53 0.32 10 AV6 -0.03 12 26 47 53 1.34 VOL AV6 -0.37 0.29 0.66 12 27 47 53 0.17 6 AV7 0.00 12 27 47 53 0.66 VOL AV7 -0.21 0.19 OAO 13 28 42 54 0.20 7 AV2 -0.05 13 28 42 54 1.07 VOL AV2 -OAO 0.24 0.64 13 29 42 54 0.34 12 AV3 -0.05 13 29 42 54 0.71 VOL AV3 -0.32 0.24 0.56 13 29 42 54 0.54 VOL AV3 -0.35 0.16 0.51 13 30 42 54 0.56 17 AV4 -0.08 13 30 42 54 0.55 VOL AV4 -0.24 0.11 0.35 13 30 42 54 1.86 VOL AV4 -0.53 0.08 0.61 13 31 42 54 OA7 15 AV5 -0.05 13 31 42 54 0.90 VOL AV5 -0.59 -0.13 0.46 13 31 42 54 1.16 VOL AV5 -0.67 0.03 0.70 13 32 42 54 OA8 15 AV6 -0.11 13 32 42 54 0.30 VOL AV6 -0.13 0.16 0.29 13 32 42 54 1.91 VOL AV6 -0.35 0.32 0.67 13 33 42 54 0.33 11 AV7 -0.03 13 33 42 54 0.52 VOL AV7 -0.32 0.05 0.37 13 33 42 54 0.83 VOL AV7 -OA8 0.03 0.51 13 34 42 54 0.26 9 AV8 -0.05 13 34 42 54 OA9 VOL AV8 -0.21 0.16 0.37 13 34 42 54 0.66 VOL AV8 -0.37 0.27 0.64 14 35 54 54 0.07 3 AV4 -0.11 14 35 54 54 0.30 VOL AV4 -0.35 -0.16 0.19 14 36 54 54 0.12 4 AV5 -0.08 14 36 54 54 0.34 VOL AV5 -0.21 0.08 0.29 14 37 54 54 0.34 11 AV6 -0.08 14 37 54 54 1.54 VOL AV6 -OA8 0.11 0.59 14 38 54 54 0.21 8 AV7 -0.03 14 38 54 54 0.98 VOL AV7 -0.51 -0.05 OA6 14 39 54 54 OA1 13 AV8 0.03 14 39 54 54 0.59 VOL AV8 -0.03 0.37 OAO 14 39 54 54 0.89 VOL AV8 -0.24 OAO 0.64 15 40 51 55 0.08 3 AV3 -0.03 15 40 51 55 OAO VOL AV3 -0.19 0.19 0.38 16 41 39 56 0.25 9 AV2 -0.05 Page 20 of27

TABLE 6 Steam Generator 12 AVB Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 16 41 39 56 1.04 VOL AV2 -0.54 0.03 0.57 16 42 39 56 0.33 11 AV3 0.00 16 42 39 56 1.46 VOL AV3 -0.05 0.56 0.61 16 43 39 56 0.18 7 AV4 -0.08 16 43 39 56 0.69 VOL AV4 -0.51 -0.05 0.46 16 44 39 56 0.28 10 AV5 -0.03 16 44 39 56 0.24 VOL AV5 -0.27 0.03 0.30 16 44 39 56 0.96 VOL AV5 -0.46 0.16 0.62 16 45 39 56 0.31 10 AV6 -0.05 16 45 39 56 0.55 VOL AV6 -0.29 0.16 0.45 16 45 39 56 0.73 VOL AV6 -0.37 0.21 0.58 16 46 39 56 0.16 6 AV8 -0.05 16 46 39 56 0.56 VOL AV8 -0.32 0.19 0.51 17 47 46 56 0.15 5 AV3 -0.13 17 47 46 56 0.85 VOL AV3 -0.29 0.21 0.50 17 48 46 56 0.41 13 AV5 -0.08 17 48 46 56 1.35 VOL AV5 -0.37 0.19 0.56 17 49 46 56 0.41 13 AV6 -0.08 17 49 46 56 0.79 VOL AV6 -0.37 0.16 0.53 17 49 46 56 0.96 VOL AV6 -0.40 0.16 0.56 17 50 46 56 0.49 15 AV7 -0.03 17 50 46 56 1.62 VOL AV7 -0.43 0.21 0.64 17 51 46 56 0.25 8 AV8 -0.03 17 51 46 56 0.84 VOL AV8 -0.35 0.24 0.59 18 52 55 56 0.08 3 AV4 -0.03 18 52 55 56 0.46 VOL AV4 -0.35 0.21 0.56 18 53 55 56 0.51 15 AV5 -0.03 18 53 55 56 1.75 VOL AV5 -0.40 0.24 0.64 18 54 55 56 0.42 13 AV6 -0.05 18 54 55 56 1.50 VOL AV6 -0.40 0.21 0.61 18 55 55 56 0.30 10 AV7 -0.03 18 55 55 56 1.45 VOL AV7 -0.37 0.29 0.66 19 56 42 58 0.25 8 AV7 0.00 19 56 42 58 0.86 VOL AV7 -0.29 0.24 0.53 20 57 47 58 0.18 6 AV3 -0.16 20 57 47 58 0.89 VOL AV3 -0.29 0.11 0.40 20 58 47 58 0.18 6 AV4 -0.11 20 58 47 58 0.86 VOL AV4 -0.37 0.03 0.40 21 59 33 60 0.18 6 AV7 0.00 21 59 33 60 0.69 VOL AV7 0.05 0.29 0.24 22 60 39 61 0.19 7 AV3 -0.05 22 60 39 61 0.76 VOL AV3 -0.03 0.43 0.46 22 61 39 61 0.13 5 AV4 -0.05 22 61 39 61 0.46 VOL AV4 0.03 0.37 0.34 23 62 54 61 0.17 6 AV3 -0.08 23 62 54 61 0.52 VOL AV3 -0.13 0.16 0.29 24 63 55 61 0.11 4 AV9 0.03 Page 21 of27

TABLE 6 Steam Generator 12 AVB Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 24 63 55 61 0.46 VOL AV9 0.05 0.51 0.46 25 64 41 64 0.35 11 AV3 -0.03 25 64 41 64 1.05 VOL AV3 -0.38 0.16 0.54 25 65 41 64 0.10 4 AV4 -0.05 25 65 41 64 0.58 VOL AV4 -0.24 0.32 0.56 25 66 41 64 0.20 7 AV6 -0.05 25 66 41 64 0.76 VOL AV6 -0.27 0.24 0.51 26 67 35 65 0.13 5 AV4 -0.08 26 67 35 65 0.37 VOL AV4 -0.03 0.27 0.30 27 68 47 65 0.22 7 AV3 0.00 27 68 47 65 0.90 VOL AV3 -0.11 0.45 0.56 27 69 47 65 0.14 5 AV4 -0.11 27 69 47 65 0.43 VOL AV4 -0.05 0.24 0.29 27 70 47 65 0.30 10 AV5 -0.03 27 70 47 65 0.79 VOL AV5 0.11 0.37 0.26 27 70 47 65 0.25 VOL AV5 -0.05 0.19 0.24 28 71 39 66 0.05 2 AV3 -0.05 28 71 39 66 0.57 VOL AV3 -0.48 0.27 0.75 28 72 39 66 0.40 12 AV4 -0.08 28 72 39 66 0.26 VOL AV4 0.11 0.29 0.18 28 72 39 66 1.41 VOL AV4 -0.35 0.37 0.72 28 73 39 66 0.21 7 AV6 -0.03 28 73 39 66 1.09 VOL AV6 -0.40 0.24 0.64 28 74 39 66 0.34 11 AV7 -0.11 28 74 39 66 1.70 VOL AV7 -0.43 0.19 0.62 28 75 39 66 0.15 5 AV8 -0.03 28 75 39 66 0.87 VOL AV8 -0.43 0.61 1.04 29 76 51 66 0.07 3 AV4 -0.05 29 76 51 66 0.56 VOL AV4 -0.62 0.35 0.97 29 77 51 66 0.13 4 AV6 -0.08 29 77 51 66 0.71 VOL AV6 -0.80 0.05 0.85 29 78 51 66 0.13 4 AV7 -0.19 29 78 51 66 0.57 VOL AV7 -0.40 0.08 0.48 30 79 41 67 0.08 3 AV7 0.00 30 79 41 67 0.26 VOL AV7 -0.03 0.16 0.19 31 80 37 69 0.13 5 AV4 -0.05 31 80 37 69 0.32 VOL AV4 -0.13 0.16 0.29 32 81 42 71 0.10 4 AV3 -0.11 32 81 42 71 0.49 VOL AV3 -0.69 0.35 1.04 32 82 42 71 0.10 4 AV6 -0.03 32 82 42 71 0.42 VOL AV6 -0.40 0.53 0.93 33 83 47 73 0.15 6 AV4 -0.08 33 83 47 73 0.59 VOL AV4 -0.46 -0.11 0.35 33 84 47 73 0.08 3 AV5 -0.08 33 84 47 73 0.45 VOL AV5 -0.29 0.11 0.40 34 85 51 74 0.13 5 AV4 -0.03 34 85 51 74 0.64 VOL AV4 -0.56 0.32 0.88 Page 22 of27

TABLE 6 Steam Generator 12 AVB Wear TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 35 86 39 79 0.15 5 AV5 -0.05 35 86 39 79 0.97 VOL AV5 -0.59 0.40 0.99 35 87 39 79 0.15 5 AV6 -0.03 35 87 39 79 0.67 VOL AV6 -0.70 0.48 1.18 Page 23 of27

TABLE 7 Steam Generator 11 Tube Plugging TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 1 1 55 56 0.39 25 01H -0.5S 1 1 55 56 0.91 VOL 01H -0.77 O.OS 0.S5 1 2 55 56 0.16 13 04H 0.32 1 2 55 56 OA7 VOL 04H 0.19 0.53 0.34 1 3 55 56 0.12 11 OSH -O.SO 1 3 55 56 0.65 VOL OSH -0.99 -0.51 OAS 2 4 54 57 0.33 23 01H -0.51 2 4 54 57 OA7 VOL 01H -0.91 -0.21 0.70 2 5 54 57 0.13 11 02H 0.64 2 5 54 57 0.29 VOL 02H 0.24 0.56 0.32 2 6 54 57 0.10 9 03H 0.69 2 7 54 57 0.15 13 04H -0.67 2 7 54 57 0.74 VOL 04H -0.96 -0.59 0.37 3 S 41 66 0.36 24 OSC 0.30 3 S 41 66 1.12 VOL OSC -0.31 OA7 0.7S 3 9 41 66 0.16 6 AV3 -0.05 3 9 41 66 1.03 VOL AV3 -0.32 0.27 0.59 3 10 41 66 0.47 15 AV4 -0.11 3 10 41 66 2.11 VOL AV4 -0.19 0.21 OAO 3 11 41 66 0.24 S AV5 -0.03 3 11 41 66 1.15 VOL AV5 0.00 OA3 OA3 3 12 41 66 0.29 10 AV6 -O.OS 3 12 41 66 1.20 VOL AV6 -0.37 0.29 0.66 3 13 41 66 0.54 17 AV7 -0.05 3 13 41 66 2.14 VOL AV7 -0.51 0.13 0.64 3 14 41 66 0.14 5 AVS -O.OS 3 14 41 66 0.69 VOL AVS -OA3 0.13 0.56 3 15 41 66 0.20 7 AV9 -O.OS 3 15 41 66 0.93 VOL AV9 -0.05 OA7 0.52 Page 24 of27

TABLE 8 Steam Generator 12 Tube Plugging TUBE# IND# ROW COL VOLTS PCT LOCATION ELEV FROM ELEV TO LENGTH 1 1 10 56 0.30 22 05C 0.43 1 1 10 56 0.38 VOL 05C 0.16 0.53 0.37 2 2 55 58 0.54 31 03H -0.79 2 2 55 58 1.42 VOL 03H -0.79 -0.38 0.41 2 3 55 58 0.18 15 04C 0.50 2 3 55 58 0.72 VOL 04C 0.27 0.59 0.32 2 4 55 58 0.26 19 05C 0.44 2 4 55 58 1.29 VOL 05C 0.21 0.62 0.41 3 5 52 61 0.14 5 AV1 0.12 3 5 52 61 0.75 VOL AV1 0.03 0.39 0.36 3 6 52 61 0.57 17 AV2 0.15 3 6 52 61 2.04 VOL AV2 -0.12 0.15 0.27 3 7 52 61 0.43 14 AV3 0.09 3 7 52 61 1.65 VOL AV3 -0.12 0.59 0.71 3 8 52 61 0.84 23 AV4 0.09 3 8 52 61 1.60 VOL AV4 -0.09 0.59 0.68 3 8 52 61 1.75 VOL AV4 -0.09 0.65 0.74 3 9 52 61 0.96 25 AV5 0.03 3 9 52 61 0.88 VOL AV5 -0.03 0.53 0.56 3 9 52 61 2.40 VOL AV5 -0.06 0.62 0.68 3 10 52 61 0.60 18 AV6 0.09 3 10 52 61 0.62 VOL AV6 -0.18 -0.03 0.15 3 10 52 61 1.68 VOL AV6 -0.21 0.47 0.68 3 11 52 61 0.63 19 AV7 0.03 3 11 52 61 0.72 VOL AV7 -0.21 0.42 0.63 3 11 52 61 1.62 VOL AV7 -0.21 0.53 0.74 3 12 52 61 0.24 9 AV8 0.06 3 12 52 61 1.05 VOL AV8 -0.09 0.53 0.62 3 13 52 61 0.14 5 AV9 0.09 3 13 52 61 0.59 VOL AV9 -0.15 0.27 0.42 4 14 31 104 0.48 29 03C -0.62 4 14 31 104 0.92 VOL 03C -0.89 -0.53 0.36 Page 25 of27

5. Number of tubes plugged or repaired during the inspection outage for each active degradation mechanism, Table 9 provides the number of tubes plugged during 1R28.

TABLE 9 MECHANISM SG 11 SG 12 AVBWear 0 0 TSPWear 3 1

6. Total number and percentage of tubes plugged or repaired to date, Table 10 provides the total number and percentage of tubes plugged to date.

TABLE 10 PLUGGING SG 11 SG 12 TOTAL 6 7 PERCENT 0.12% 0.14%

7. The results of condition monitoring, including the results of tube pulls and in-situ testing, All of the detected indications met the CM screening criteria for both leakage and structural integrity; therefore CM performance criteria were met at 1R28. Additionally, the Operation assessment (OA) performed using conservative assumptions for NDE sizing uncertainty, growth rates and cycle length provides reasonable assurance that the performance criteria will not be exceeded during the upcoming operating cycles 28, 29 and 30 until the next SG inspection.

8. The effective plugging percentage for all plugging and tube repairs in each SG, There have been no repairs performed on these SGs; therefore the effective plugging percentage is equivalent to that reported in Table 10.

9. Repair method utilized and the number of tubes repaired by each repair method, and There have been no repairs performed on these SGs.

10. The results of inspections performed under Specification 5.5.8.d.3 for all tubes that have flaws below the F* or EF* distance, and were not plugged. The report shall include: a) identification of F* and EF* tubes, and b) location and extent of degradation.

Specification S.S.8.d.3 is not applicable to Unit 1.

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LEGEND OF FIELDS AND CODES FIELD EXPLANATION TUBE # Distinct ROW/COL combination within each Table IND # Distinct ROW/COL/LOCATION combination within each Table ROW Row number of tube location COL Column number of tube location VOL T8 Measured Voltage PCT Measured percent or three digit code - see below LOCATION Affected landmark - see below ELEV_FROM Measurement in inches from the centerline of the landmark to the center of the bobbin coil indication or the lower edge of the rotating coil indication ELEV_ TO Measurement in inches from the centerline of the landmark to the upper edge of the rotating coil indication LENGTH Calculated Length (ELEV_FROM - ELEV_TO)

FIELD CODE EXPLANATION PERCENT DNG Ding Signal - Bobbin Coil MBM Manufacturing Burnish Mark - Bobbin Coil PDS Pilger Drift Signal - Bobbin Coil PLP Possible Loose Part VOL Volumetric Indication - MRPC 0-100 As measured percent through wall - Bobbin Coil LOCATION TEH Tube end hot (primary face)

TSH Tube sheet hot (secondary face)

O?H  ? =First through Eighth tube support plate on hot leg side AV?  ? = First through Ninth anti-vibration bar O?C  ? =First through Eighth tube support plate on cold leg side TSC Tube sheet cold (secondary face)

TEC Tube end cold (primary face)

Page 27 of27