Text

CC1 R23 180-Day Steam Generator Tube Inspection Report
	ML16243A479
Person / Time
Site:	Calvert Cliffs
Issue date:	08/29/2016
From:	Adrienne Brown; BWXT
To:	; Exelon Generation Co, Office of Nuclear Reactor Regulation
References
	8000154-IR-100653, Rev 000
	Download: ML16243A479 (28)
	v • d • e

ATTACHMENT (1)

Calvert Cliffs CC1 R23 180-Day Steam Generator Tube Inspection Report Calvert Cliffs Nuclear Power Plant August 29, 2016

eWXr 13WX T(~cl1nologles, Inc.

Calvert Cliffs CC1 R23 180-Day Steam Generator Tube Inspection Report Document Number:

8000154-IR-100653, Rev. 000 SIGNATURES Prepared By: Alan M Brown &.-~ OFJ 2-'-/'l-Otb Printed Name Signature Date Reviewed By:

Richard A Coe Printed Name tt!L Signature B-2Z-/(,

Date Richard W Hundstad Approved By: 8(J..i_ (I(;

Printed Name Date

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8000154-1R-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report RECORD OF REVISIONS Revision Date Revision Description 000 08/22/2016 Original issue

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S000154-I R-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report TABLE OF CONTENTS

1.0 INTRODUCTION

.......................................................................................................................... 4 2.0 180-DAY REPORT ...................................................................................................*...................... 5

3.0 REFERENCES

............................................................................................................................. 17 APPENDIX A - CCNPPl U-Bend Support System ............................................................................. 18 APPENDIX B - CCNPPl Tube Support Layout ................................................................................. 19 APPENDIX C - Fan Bar Wear Indications (Both Steam Generators) .............................................. 20

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8000154-IR-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report 1.0 Introduction Calvert Cliffs Nuclear Power Plant Unit 1 (CCNPP1) has two recirculating steam generators designed and fabricated by Babcock and Wilcox (B&W) of Cambridge, Ontario, Canada. These replacement steam generators (RSG's), designated as SG11 and SG12, were installed in 2002.

Each RSG contains 8471 tubes. The tubing material is thermally treated lnconel 690 having a nominal outer diameter (OD) of 0. 75 inches and a nominal wall thickness of 0.042 inches. The RSG's were designed and fabricated to the ASME Boiler and Pressure Vessel Code, Section Ill, subsection NB (Class 1), 1989 Edition with no Addenda. All tubes with a bend radius of 12 inches or less (the first 18 rows) were thermally stress-relieved following bending to reduce the residual stress imparted during bending.

The straight sections of the tube bundle are supported by seven 410 stainless steel (SA-240 Type 41 OS) lattice grid supports. The fan Bar U-Bend support system incorporates sets of SA-240 Type 41 OS stainless steel fan bars on each side of the bundle as shown in Appendix A. Appendix B shows the tube support layout for the CCNPP1 steam generators.

Technical Specification (TS) 5.5.9.d provides the requirements for SG inspection frequencies and requires periodic tube inspections be performed. TS 5.5.9.d requires that 100% of the tubes be inspected at sequential periods of 144, 120, 96, and thereafter 72 effective full power months (EFPM) with the first sequential period starting after the first in-service inspection.

During the CCNPP1 spring 2016 refueling outage (CC1 R23) both Unit 1 steam generators (SG11 and SG12) were inspected in accordance with CCNPP TS 5.5.9. This was the fourth in-service inspection of the replacement steam generators. The SG's had been in operation for 152.1 EFPM at the time of the inspection. Since the first in-service inspection, the SG's had operated for 131.3 EFPM at the time of the inspection. The CC1 R23 steam generator inspection was the last scheduled inspection in the first sequential inspection period of 144 EFPM. The requirement to inspect 100% of the tubes during the first inspection period has been satisfied.

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S000154-I R-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report 2.0 180-Day Report The results of the inspection are provided below in accordance with the 180-Day reporting requirements of TS 5.6.9. Bold wording restates the TS requirement, followed by the required CC1 R23 information.

A report shall be submitted within 180 days after the initial entry into Mode 4 following completion of an inspection performed in accordance with the Specification 5.5.9, Steam Generator (SG) Program.

Initial entry into Mode 4 occurred on March 9th, 2016. Therefore, this report is required to be submitted to the NRC by September 4th, 2016.

The report shall include:

a. The scope of inspections performed on each SG The SG inspections . performed during the CC1 R23 outage included both . primary and secondary side inspections as follows:

Primary Side Eddy Current

Full-length bobbin coil inspections of all in-service tubes in both steam generators for wear at the fan bars and lattice grids and for foreign objects and associated wear

X-Probe inspection of 50% of the in-service tubes from the tube end to the 1st lattice grid on both the hot leg and cold leg sides for potential foreign objects and foreign object wear o Included all peripheral tubes and tubes near the no-tube lane o Included historical foreign object and foreign object wear indications

X-Probe inspection as follows of other locations if not already included in the base X-Probe scope discussed above (+Point' was also acceptable for these inspections) o One-tube border region around all tubes previously plugged for foreign objects or foreign object wear o All previous PLPs (Potential Loose Parts) and foreign object wear indications between the tubesheet and the first support plus a one-tube bounding region o All new PLPs and foreign object wear indications between the tubesheet and the first support plus a two-tube bounding region o All *foreign objects identified by secondary side visual inspection plus a two-tube bounding region

Special interest inspection of bobbin and X-Probe indications with +Point' as follows o All historical PLPs and foreign object wear indications plus a one-tube bounding region if located outside the X-Probe examination range o All new PLPs and foreign object wear indications plus a two-tube bounding region if located outside the X-Probe examination range

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5000154-1R-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report o All foreign objects identified by secondary side visual inspection plus a two-tube bounding region if located outside the X-Probe examination range o Ten deepest fan bar wear indications in each steam generator o All eight lattice grid wear indications (five in SG11 and three in SG12) o Other locations with bobbin probe or X-Probe signals of special interest o Additional locations as directed by BWXT or CCNPP Engineering Primary Side Visual Examinations

Visual inspections of the hot leg and cold leg channel heads in both steam generators including the divider plate/tubesheet interface, the bowl cladding, and the divider plate weld per the methods described in Westinghouse Nuclear Safety Advisory Letter (NSAL) 12-1.

Visual inspections of all previously installed plugs in both steam generators.

Secondary Side Visual Examinations

Visual inspections after sludge lancing in both steam generators including thefollowing:

o Annulus and no-tube lane regions at the top of the tubesheet to a minimum depth of five tubes into the bundle.

o Inner bundle passes at the top of the tubesheet o Underside of the first lattice grid o Current and historical foreign object or foreign object wear locations.

Visual inspection of steam drum components including moisture separators

b. Degradation mechanisms found Three tube degradation mechanisms were confirmed to be present in the CCNPP Unit 1 SG's.

These are: 1) fan bar wear, 2) lattice grid support wear, and 3) foreign object wear. No other tube degradation mechanisms, including tube-to-tube wear, were detected.

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S000154-I R-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report

c. Nondestructive examination techniques utilized for each degradation mechanism Table 1 below provides the probe types and techniques utilized for both detection and sizing of each identified degradation mechanism.

Table 1 - NOE Techniques Utilized for Detection and Sizing of Identified Degradation Degradation Probe Type Detection/Sizing? EPRIETSS Mechanism Bobbin Detection & Depth Sizing 96041.1 Fan Bar Wear

+Point' Length Sizing 96910.1 Bobbin Detection & Depth Sizing 96004.1 Lattice Grid Wear

+Point' Length Sizing 96910.1 Bobbin Detection 27091.2 Foreign Object Wear X-Probe Detection 20400.1

+Point' Sizing 27901.1*

ETSS 27901.1 was selected based on the circumferential groove appearance of the foreign object wear indications.

d. Location, orientation (if linear), and measured sizes {if available) of service induced indications Listings of the service-induced indications are provided in Appendix C for fan bar wear, Table 3 for lattice grid wear, and Table 4 for foreign object wear. Below is a summary for each degradation mechanism detected.

Fan Bar Wear A total of 556 fan bar wear (FBW) indications were identified during the CC1 R23 bobbin coil inspections (263 in SG11 and 293 in SG12). One hundred and thirteen (113) of the 556 indications were newly reported during the CC1 R23 outage (73 in SG11 and 40 in SG12). Note that several previously reported indications were not reported again during the CC1 R23 outage. This is typical at Calvert Cliffs and is primarily due to indications at or just above the detection or reporting threshold one outage, but slightly below the detection or reporting threshold during the next outage.

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S000154-IR-100653 Calvert Cliffs CC1 R23 180-Day Steam Generator Tube Inspection Report Rev:OOO The deepest fan bar wear indication was 25% TW in SG11. The deepest newly reported fan bar wear indication was 21%TW in SG12 . The quantities, depths, and growth rates for fan bar wear were consistent with expectations and previous inspection results. Appendix C provides a list of all fan bar wear indications reported during the CC1 R23 inspection. Table 2 provides a summary of the inspection results relative to fan bar wear.

Table 2 - Summary of Fan Bar Wear Indications Description SG11 SG12 Total Number of In-Service Tubes Prior to CC1 R23 8470 8470 Number of FBW Indications 263 293 Maximum Depth of FBW (% TW) 25%TW 24%TW Number of FBW Indications ::::40% TW 0 0 Number of Newly-Reported Indications 73 40 Number of Tubes Plugged due to FBW 0 0 Figure 1 - Distribution of Fan Bar Wear Depths

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5000154-IR-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report Lattice Grid Wear Eight indications of wear related to the lattice grid supports were reported during the CC 1R23 outage (five indications in SG11 and three indications in SG12) . Three of the eight lattice grid wear indications were reported in the previous inspection (CC1 R21 ). All eight of these indications were inspected with +Point' to confi rm that the morphologies of the indications were consistent with lattice grid wear and not some other damage mechanism such as foreign object wear. After confirmation with +Point', all eight indications were depth sized using the bobbin coil data. The depths of the lattice grid wear indications are consistent with the depths previously reported in both Unit 1 and Unit 2 at Calvert Cliffs. Table 3 provides a listing of these indications.

Table 3 - Table of Lattice Grid Wear Indications CC1R23 CC1R23 New in SG Row Col Location Bobbin Axial CC1R23?

Depth Extent SG11 78 94 04H +0.44" 13%TW 0.29" No SG1 1 101 105 07C -1.43" 12%TW 0.45" Yes SG11 116 86 03H -1.45" 9%TW 0.48" Yes SG11 116 126 02H +2.85" 7%TW 0.37" Yes SG1 1 137 91 06H -1.59" 11 %TW 0.58" Yes SG12 69 67 04H +0.69" 5%TW 0.19" Yes SG12 122 86 07C +1 .11 " 12%TW 0.29" No SG12 134 88 02H -1.46" 15%TW 0.38" No

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5000154-IR-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report Foreign Object Wear During the CC1 R23 inspection , fifteen (15) indications of foreign object wear were detected (six in SG11 and nine in SG12) . Eight of the indications were newly reported during the CC1 R23 inspection . The other seven indications were legacy indications which showed no significant change since the previous inspection in CC1 R21 . All indications were sized using the +Point' inspection results .

With the exception of the indication in SG11 R57 C35, all indications were confirmed via eddy current and/or visual inspection to no longer have a part present. Based on eddy current results, the part that caused the small wear indication at the 02C intersection in SG11 R57 C35 was still present, but was not in contact with any adjacent tubes . Since this location was not accessible for retrieval of the part, this tube was preventatively plugged and stabilized.

Since all other foreign object wear indications were depth sized at less than the Tech Spec plugging limit of 40% TW and the parts that caused the wear were no longer present, the other foreign object wear indications were left in service.

Table 4 provides a listing of all foreign object wear indications detected during the CC1 R23 inspection .

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Calvert Cliffs CC1R23 Rev:OOO S000154-IR-100653 180-Day Steam Generator Tube Inspection Report Table 4 - Table of Foreign Object Wear Indications CC1R23 CC1R23 Object Axial New in SG Row Col Location Depth Still Extent CC1R23?

(%TW) Present?

(Inches)

SG11 57 35 02C +1.48" 9%TW 0.4" Yes Yes*

SG11 69 13 TSH +1.05" 27%TW 0.34" Yes No SG11 70 14 TSH +0 .93" 24%TW 0.37" Yes No SG11 70 14 TSH +1.23" 35%TW 0.6" Yes No SG11 113 113 TSH +0.42" 25%TW 0.29" No No SG11 126 114 TSH +0.92" 19%TW 0.29" No No SG12 5 165 TSH +22.13" 19%TW 0.24" Yes No SG12 18 152 03H -1 .79" 26%TW 0.19" Yes No SG12 22 70 TSC +0.18" 23%TW 0.34" No No SG12 106 134 TSH +7.41 " 25%TW 0.24" No No SG12 115 45 TSC +0.35" 17%TW 0.25" Yes No SG12 116 44 TSC +0.42" 25%TW 0.31 " No No SG12 117 45 TSC +0.3" 21 %TW 0.22" No No SG12 136 86 TSC +8 .63" 25%TW 0.41 " No No SG12 137 85 TSC +8.55" 17%TW 0.35" Yes No

Tube plugged

e. Number of tubes plugged during the inspection outage for each degradation mechanism One tube was plugged during the CC1 R23 outage. As discussed above, Tube R57 C35 in SG11 was plugged and stabilized due to a foreign object wear indication with the part still present. No plugging for fan bar wear or lattice grid wear was required or performed . Table 5 provides a summary of the plugging performed during the CC1 R23 outage.

Table 5 - Summary of Tube Plugging During CC1 R23 Outage Degradation Mechanism SG11 SG12 Fan Bar Wear 0 0 Lattice Grid Wear 0 0 Foreign Object Wear 1 0 Total 1 0

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S000154-IR-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report

f. The number and percentage of tubes plugged to date and the effective plugging percentage in each steam generator Table 6 provides the post CC 1R23 outage plugging status of the CCNPP1 steam generators. There are two tubes plugged in SG 11 and one tube plugged in SG 12. There are no sleeves installed in the CCNPP1 steam generators .

Table 6 - Summary of Tubes Plugged To Date SG11 SG12 Total Tubes Installed 8471 8471 16942 Tubes Plugged To Date 2 1 3 Effective Plugging Percentage 0.024% 0.012% 0.018%

g. The results of condition monitoring, including the results of tube pulls and in-situ testing The results of the condition monitoring (CM) assessment are provided below for each of the three degradation mechanisms that were detected. All tube degradation reported met the structural and leakage performance criteria analytical ly. No tube pulls or in-situ pressure testing were required or performed. A summary of the results of the visual inspections is also provided below.

Fan Bar Wear Based on the sizing parameters for bobbin ETSS 96041 .1, the CM curve shown in Figure 2 was generated and documented in the Degradation Assessment (DA) . For the indications that weren 't inspected with +Point', a conservative axial length of 1.8" was used based on current and previous length sizing of the deepest indications. As shown , all of the indications lie well below the CM curve .

Hence, structural integrity of the fan bar wear indications is demonstrated .

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8000154-IR-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report Figure 2 - Condition Monitoring Results for Fan Bar Wear 100 Note: CM limit curve is based on structural lengths 90 and depths. Indication depths are conservatively plotted using maximum depths from bobbin.

Indication lengths are conservatively plotted as the - CM Limit (Bobbin; 96041.1) total length for flaws that were +Point tested or a 80 bounding 1.8" for flaws that were not +Point tested. -

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5000154-IR-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report Lattice Grid Wear Based on the sizing parameters for bobbin ETSS 96004.1, the CM curve shown in Figure 3 was generated and documented in the DA. Since all of the lattice grid wear indications were inspected with +Point', the lengths measured from the +Point' and depths from bobbin inspections are reflected in the figure. As shown, all indications lie well below the CM curve . Hence, structural integrity of the lattice grid wear indications is demonstrated .

Figure 3 - Condition Monitoring Results for Lattice Grid Wear 100 Note: CM limit curve is based on structural lengths 90 ~

and depths. Indications are conservatively plotted using total lengths from +Point and maximum depths from bobbin. - CM Limit (Bobbin; 96004.1) 80 -

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5000154-1R-100653 Calvert Cliffs CC1R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report Foreign Object Wear EPRI Examination Technique Specification Sheet (ETSS) 27901 .1 was used for depth sizing of all foreign object wear indications. As documented in the CC1 R23 Degradation Assessment (DA) ,

ETSS 27902 .1 provides a lower CM limit compared to ETSS 27901 .1. Hence, use of the CM limit curve from the DA is appropriate and conservative for the evaluation of foreign object wear at Calvert Cliffs Unit 1. Figure 4 shows the condition monitoring results for foreign object wear. As shown , all indications lie well below the CM curve . Hence, structural integrity for all 15 foreign object wear indications reported in CC1 R23 is demonstrated .

Figure 4 - Condition Monitoring Results for Foreign Object Wear 100 Note 1: CM limit curve is based on structural lengths and depths.

90 Indications are conservatively plotted us ing total lengths and maximum depths .

- CM Limit (27902.l ; +Point'M)

Note 2: CM limit curve shown is for 80 -

ETSS 27902 .1 as documented in the DA.

This ETSS gives a lower CM limit that

Foreign Object Wea r Indications (Sized by 27901.1; +Point '"

ETSS 2790 1. 1 and is , therefore, conservative for this applic ation.

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Page 15 of 27

8000154-IR-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report Leakage Integrity Per the EPRI SG Integrity Assessment Guidelines (Ref. 1), for volumetric flaws with axial extents

<::0.25", the onsets of pop-through leakage and burst are coincident. Therefore, if structural integrity is satisfied at the 3dP (3 times the normal operating pressure differential) value , accident leakage integrity is also satisfied at the lower accident pressure differentials.

Some of the detected flaws had measured axial extents <0.25". For these cases , the flaws were evaluated for leakage integrity using the flaw model for uniform 360 degree thinning of finite axial extent. This is allowed per Section 9.6.3 of the EPRI SG Integrity Assessment Guidelines (Ref. 1) for situations involving pressure loading only. Using the uniform thinning equation from Section 5.3.2 of the EPRI SG Flaw Handbook (Ref. 2), the CM limits of flaws with axial lengths of 0.25" are 61 .9%TW, 64.2%TW, and 67.2%TW for fan bar wear, lattice grid wear, and foreign object wear, respectively. Since none of the detected indications approached these depths, accident leakage integrity for these shorter volumetric flaws is also confirmed.

The operational leakage criterion was also satisfied by the absence of any measureable primary to secondary leakage since the previous inspection .

Primary Side Visual Inspections The visual inspections of the plugs identified no plug degradation or evidence of plug leakage.

The visual inspection of the channel heads identified no service-induced degradation in either steam generator.

Secondary Side Visual Inspections Secondary side visual inspections were performed at the top of the tubesheet in both steam generators with a focus on identifying and removing foreign objects. A total of twenty-two foreign objects were removed . The material removed consisted of flexitallic gasket (10 pieces) , machine curls (11 pieces), and one piece resembling weld slag . No objects capable of causing significant wear remain adjacent to in-service tubes .

Steam drum inspections were performed in both steam generators. No evidence of foreign material or degradation was observed in either steam drum . In SG11 , one of six nuts securing the steam outlet venturi was found to be loose. The loose nut was retightened and staked. All of the other nuts (including those in SG 12) were found to be tight.

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5000154-1R-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report 3.0 References

1. EPRI Document 1019038, "Steam Generator Integrity Assessment Guidelines", Revision 3, November 2009.

2. EPRI Document 3002005426, "Steam Generator Management Program : Steam Generator Degradation Specific Management Flaw Handbook, Revision 2", October 2015.

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8000154-IR-100653 Calvert Cliffs CC1R23 Rev: 000 180-Day Steam Generator Tube Inspection Report APPENDIX A- CCNPP1 U-BEND SUPPORT SYSTEM CLAMPING BARS ARCH BARS TIE TUBBS lUBE IN PLANE DIRECTION nJBE OITT OF PLANE FLAT BAR DIRECTION -B.END RESTRAJNTS

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8000154-1R-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report APPENDIX B - CCNPP1 TUBE SUPPORT LAYOUT

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8000154-1R-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report APPENDIX C - CC1 R23 Fan Bar Wear Indications SG11 SG12 Depth Depth SG Row Col Location SG Row Col Location

(%TW) (%TW)

SG11 37 17 F12 -2.B9" 9 SG12 5 5 F12 -4.23" 6 SG11 40 134 F07 +1.01" . 16 SG12 17 1 F12 -0.66" 13 SG11 52 9B FOB -0.95" 10 SG12 3B 22 F07 -0.76" 12 SG11 54 12B F06 +O.B" B SG12 40 16 F06 +0.72" 9 SG11 56 102 FOB -0.9" B SG12 41 45 F07 -1.15" 16 SG11 57 B9 FOB +1.59" 16 SG12 41 57 F07 -0.92" 9 SG11 5B B2 F07 +1.76" 10 SG12 42 16 F07 -0.97" 7 SG11 60 6B F07 +O.B4" B SG12 49 65 F07 -1.5" 9 SG11 61 125 F07 +1.93" 15 SG12 54 50 F06-1.71" 9 SG11 62 92 F06 -1.6B" 7 SG12 54 6B F07 -1.39" 7 SG11 63 115 FOB +1.B3" B SG12 61 B5 F09 -0.94" 11 SG11 64 7B F06 -1.B" B SG12 63 59 F10 +2.97" B SG11 66 B6 FOB -0.7B" 7 SG12 66 20 F06 -1.36" 12 SG11 6B 54 F07 -1.04" B SG12 66 52 FOB -1.01" 10 SG11 6B 7B F06 -1.72" B SG12 66 94 F07 +O.B2" 7 SG11 6B B4 F06 -0.75" 9 SG12 66 94 F07 +1.B5" 7 SG11 69 79 F07 -O.B4" 10 SG12 67 B9 F07 +1.33" 9 SG11 70 B6 F07 +1.B2" 7 SG12 67 111 F07 -0.92" 7 SG11 71 B3 FOB -0.6" 9 SG12 6B 92 FOB +O.B7" 6 SG11 72 B6 F07 +1.29" 5 SG12 72 92 FOB +O.B1" 7 SG11 73 107 F07 -1.22" B SG12 76 7B FOB +1.B9" 6 SG11 74 6B F07 +0.9" 6 SG12 76 90 F07 -1.92" 7 SG11 76 B6 F07 +1.B4" 10 SG12 76 92 FOB +O.B" B SG11 77 69 FOB +O.B1" B SG12 79 49 F06 +1.22" 15 SG11 77 B3 F06 +0.44" 7 SG12 79 75 F07 +1.B2" 7 SG11 7B 7B F06 -1.77" B SG12 79 91 F07 +0.74" 6 SG11 7B B4 FOB +O.B5" B SG12 BO 124 F07 +1.55" 6 SG11 79 79 F07 +1.94" 7 SG12 B1 73 F07 +1.B3" 6 SG11 79 B3 FOB -0.55" 7 SG12 B1 75 F07 +1.B3" 6 SG11 BO B4 FOB +O.B3" 7 SG12 B1 75 FOB +O.B" 6 SG11 BO B6 F07 +1.B9" B SG12 B2 B6 F07 +1.7B" 7

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5000154-1R-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report SG11 SG12 Depth Depth SG Row Col Location

(%TW)

SG Row Col Location

(%TW)

SG11 80 86 F08 +0.76" 7 SG12 82 90 F07 +0.8" 7 SG11 82 78 F08 +1.98" 6 SG12 82 92 F07 +1.88" 6 SG11 82 82 F08 +1.91" 8 SG12 82 92 F08 +0.8" 6 SG11 83 69 F08 +0.76" 7 SG12 82 94 F07 +1.88" 5 SG11 83 79 F07 +1.87 7 SG12 83 77 F07 -0.8" 21 SG11 83 79 F08 +0.96" 8 SG12 83 87 F08 +1.9" 10 SG11 83 87 F07 +1.45" 11 SG12 83 91 F07 -0.87" 7 SG11 84 70 F07 +0.88" 6 SG12 84 82 F05 -0.78" 6 SG11 84 78 F05 -0.75" 8 SG12 84 88 F07 -1.89" 7 SG11 84 86 F07 -1.86" 3 SG12 84 88 F08 +0.62" 6 SG11 84 86 F07 +1.83" 8 SG12 84 90 F07-1.91" 8 SG11 85 69 F07 +1.9" 8 SG12 84 92 F08 +0.8" 10 SG11 85 69 F08 +0.83" 8 SG12 85 59 F07 +1.42" 15 SG11 85 73 F07 -1.71" 7 SG12 85 75 F07 +1.97" 6 SG11 85 81 F06 -0.7" 6 SG12 85 75 F08 +0.87" 7 SG11 86 80 F09 +0.84" 8 SG12 85 89 F11 +2.32" 6 SG11 86 84 F08 +0.87" 7 SG12 85 91 F05 -0.89" 9 SG11 87 75 F07 +1.95" 10 SG12 85 91 F06 +1.77" 6 SG11 87 79 F07 +2.1" 11 SG12 85 91 F07 -0.87" 5 SG11 87 79 F08 +0.84" 7 SG12 85 95 F07 -1.03" 4 SG11 88 84 F07 +2.05" 8 SG12 85 99 F07 +0.76" 8 SG11 88 84 F08 +1.08" 7 SG12 86 90 F07 -1.94" 7 SG11 88 86 F07 +1.72" 9 SG12 87 75 F07 +1.98" 9 SG11 88 86 F08 -1.96" 7 SG12 87 75 F09 -0.71" 7 SG11 89 69 F07 +1.77" 9 SG12 87 77 F07 +1.75" 7 SG11 89 69 F08 +0.81" 8 SG12 87 81 F07 +1.98" 7 SG11 89 75 F06 +0.86" 5 SG12 87 83 F06 +0.48" 10 SG11 89 79 F07 -1.35" 5 SG12 87 91 F05 -0.79" 7 SG11 89 81 F07 +1.98" 6 SG12 88 88 F06 -0.8" 7 SG11 89 83 F06 +0.46" 9 SG12 88 92 F07 +1.97" 8 SG11 90 78 F07 +0.91" 6 SG12 88 92 F08 +0.79" 10 SG11 90 84 F10 -0.9" 11 SG12 89 75 F07 -1.72" 6 SG11 91 81 F07 -1.28" 6 SG12 89 79 F08 +0.83" 8 SG11 91 95 F07 -0.85" 5 SG12 89 83 F06 +0.46" 9 SG11 92 74 F07 +0.88" 10 SG12 89 87 F08 +1.83" 6 SG11 92 76 F07 +0.82" 7 SG12 89 91 F06 -1.89" 10 SG11 92 78 F06 -1.8" 8 SG12 89 91 F07 +0.79" 9 SG11 92 78 F07 +1.35" 12 SG12 89 91 F08 +1.82" 8

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8000154-1R-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report SG11 SG12 Depth Dep~h SG Row Col Location

(%TW)

SG Row Col Location

(%TW)

SG11 92 7B FOB +1.42" 11 SG12 89 93 F08 -O.B3" 4 SG11 92 B2 F07 +0.91" B SG12 90 72 F06 -1.66" 6 SG11 92 BB FOB -1.32" 9 SG12 90 74 FOB +2.03" 7 SG11 93 69 F08 +0.79" 10 SG12 90 92 FOB -1.9B" B SG11 93 73 F07 -1.9" 7 SG12 90 92 FOB +O.B" 7 SG11 93 75 F06 +O.B3" 7 SG12 91 75 F07 +1.9B" 8 SG11 93 83 F07 -0.51" 7 SG12 91 75 FOB +0.92" 6 SG11 94 74 F07 +0.76" 7 SG12 91 91 F07 +0.79" 5 SG11 94 76 F07 +0.8" 8 SG12 91 91 F08 +1.B7" 7 SG11 94 78 F07 +0.91" 6 SG12 92 7B F07 -1.75" 14 SG11 94 80 F07 +0.91" 7 SG12 92 90 F07 -1.92" 6 SG11 94 B2 F07 +0.91" 9 SG12 92 90 F07 +1.34" 10 SG11 94 B4 FOB +0.81" 7 SG12 92 92 F07 +1.B4" 6 SG11 95 75 F07 +1.85" 11 SG12 92 92 FOB +O.B" 8 SG11 95 79 F09 -1.87" 6 SG12 92 94 F07 +1.93" 6 SG11 95 B3 F07 -0.4B" 13 SG12 93 71 F07 -1.7B" 14 SG11 95 B5 F07 +0.79" 7 SG12 93 B3 F06 +0.49" 12 SG11 95 B9 F07 +0.72" 7 SG12 93 91 F07 +O.B" B SG11 96 74 F07 +0.81" 6 SG12 93 91 FOB +1.79" 7 SG11 96 7B FOB +1.8" 8 SG12 93 95 F07 +0.9" 7 SG11 96 BO F06 -1.24" 7 SG12 94 76 F06 -1.66" 7 SG11 96 B2 F07 +0.89" 10 SG12 94 76 F07 +O.B6" 7 SG11 96 86 F07 -1.8" 6 SG12 94 B2 F06 -1.85" 6 SG11 96 92 F06 -1.1B" 7 SG12 94 BB F07 +1.82" 5 SG11 97 65 F07 +0.74" 11 SG12 94 90 F07 -1.B6" 9 SG11 97 75 F07 +1.92" 5 SG12 94 92 F07 +1.86" 10 SG11 97 79 F07 +1.96" 9 SG12 94 92 FOB +0.9" 9 SG11 97 B1 F07 -1.39" 5 SG12 94 96 F07 -2.09" 6 SG11 97 B1 FOB -1.76" 7 SG12 95 79 F07+1.71" B SG11 97 B3 F06 -0.48" 7 SG12 95 B1 F07 +1.B" 9 SG11 97 B3 F07 -0.4B" B SG12 95 B3 F06 +0.46" 12 SG11 9B 70 F07 -0.79" 6 SG12 95 91 FOB +1.B8" 6 SG11 9B 74 F07 +O.B3" 15 SG12 96 78 F06 -1.63" 7 SG11 98 7B F06-1.71" 7 SG12 96 7B F07 +0.77" 6 SG11 98 7B F07 +0.77" B SG12 96 B2 F06 -1.B5" 6 SG11 9B BO F07 +0.91" 10 SG12 96 8B F06 -0.76" 6 SG11 9B 82 F07 +0.95" B SG12 96 8B F07 +1.B3" B SG11 9B 82 FOB +2.12" 10 SG12 96 B8 FOB +0.76" 7

Page 22 of27

8000154-IR-100653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report SG11 SG12 Depth Depth SG Row Col Location

(%TW)

SG Row Col Location

(%TW)

SG11 98 90 F07 +1.71" 10 SG12 96 90 F07 -1.9" 6 SG11 99 65 F07 +1.25" 6 SG.12 97 73 F07 +1.04" 7 SG11 99 75 F07+1.81" 9 SG12 97 B1 F07 +1.B6" 9 SG11 99 79 F07 +1.94" 10 SG12 97 B3 F06 +0.44" 9 SG11 99 83 F06 +0.53" 10 SG12 97 B3 F07 +0.46" 12 SG11 99 83 F07 -0.48" 9 SG12 97 91 F07 +O.B1" 9 SG11 99 B3 FOB +0.6" 7 SG12 97 93 F07 -0.99" 6 SG11 99 B5 F06 +0.73" 5 SG12 98 72 F06 -1.78" B SG11 99 B5 F06 +1.79" 7 SG12 9B 72 F07 +0.95" 5 SG11 99 B9 F07 +0.74" 12 SG12 9B 76 F06 -1.57" 10 SG11 100 72 F07 +O.BB" B SG12 9B 82 F06 -1.7B" 5 SG11 100 7B F06 -1.B3" 14 SG12 9B B2 F07 +0.74" 9 SG11 100 BO FOB +1.31" 4 SG12 9B B4 FOB -1.96" 7 SG11 100 B2 F06 +1.4" 6 SG12 9B 90 F07 -1.85" 9 SG11 100 B2 F06 -1.38" 5 SG12 9B 92 F07 -1.B5" 6 SG11 100 B4 F07 +1.B6" B SG12 99 75 F07 +1.B7" 7 SG11 100 B4 FOB +O.B7" 6 SG12 99 79 F06 -0.71" 5 SG11 100 90 F07 +1.62" 11 SG12 99 79 F07 +1.93" 9 SG11 101 75 F07 +1.9" 12 SG12 99 B1 F07 +1.B" 7 SG11 101 79 F06 -0.72" 12 SG12 99 B3 F06 -0.53" 10 SG11 101 79 F07 +1.87" 11 SG12 99 B3 F07 -0.53" B SG11 101 B3 F07 -0.51" 14 SG12 99 B3 FOB +0.49" 6 SG11 101 B5 F07 +O.B1" 7 SG12 99 87 F07 +0.73" B SG11 101 87 F06-1.79" 8 SG12 99 89 F07 -O.B5" 10 SG11 101 B7 F07 +0.72" 9 SG12 99 B9 F07 +1.29" 7 SG11 101 87 F09 -0.81" 6 SG12 99 B9 FOB -1.25" 6 SG11 101 89 F07 +0.67" 6 SG12 99 93 F07 +O.B5" B SG11 102 78 F06 -1.75" 7 SG12 99 95 F06 -1.B3" 7 SG11 102 BO FOB +O.B2" 7 SG12 100 7B

F06 -1.B5" 9 SG11 102 B4 F06 -0.79" 6 SG12 100 86 F06 +0.76" 4 SG11 102 B4 F07 +1.94" 7 SG12 100 BB F07 +1.94" 7 SG11 102 B6 F06 -0.74" 7 SG12 100 90 F05 +1.B" 6 SG11 102 B6 F07+1.81" 14 SG12 100 90 F07 -1.B7" 10 SG11 103 75 F07 +1.99" B SG12 100 90 FOB -1.41" 4 SG11 103 79 F06 -0.74" 11 SG12 101 63 F06 +0.69" 3 SG11 103 79 F07 +2.07" 14 SG12 101 75 F07 +1.57" 9 SG11 103 B1 F07-1.75" B SG12 101 83 F06 +0.4B" 11 SG11 103 B3 F06 +O" 4 SG12 101 B3 F07 -0.55" 7

Page 23of27

8000154-1R-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report SG11 SG12 Depth Depth SG Row Col Location

(%TW)

SG Row Col Location

(%TW)

SG11 103 B3 F07 -0.46" 10 SG12 101 B7 F07 -0.79" 5 SG11 104 BO F07 +O.B4" 14 SG12 101 B7 F07 +1.02" 5 SG11 104 B2 F06 -1.5B" 11 SG12 101 91 F06 -1.9" 9 SG11 104 B2 F07 +0.95" 20 SG12 101 91 F07 +0.76" 9 SG11 104 B2 FOB +1.49" B SG12 101 93 F07 +O.B5" 11 SG11 104 BB F06 -O.B1" 10 SG12 102 76 F06-1.71" 7 SG11 105 75 F07 +2.02" 11 SG12 102 7B F06 -1.71" 7 SG11 105 79 F06 -0.6B" B SG12 102 7B F07 +O.B3" 5 SG11 105 79 F07 +1.B" 19 SG12 102 B2 F06 -1.72" 15 SG11 105 B1 F07 +2.04" 7 SG12 102 B6 F06 -0.71" 7 SG11 105 B3 F07 -0.46" B SG12 102 BB F06 +1.27" 9 SG11 105 B5 F07 +O.B1" 10 SG12 103 73 F07 +1.76" 6 SG11 105 B9 F07 +0.74" 16 SG12 103 75 F06 -0.74" 7 SG11 106 74 F06 -1.B5" B SG12 103 75 F07 +1.93" 10 SG11 106 74 F07 +0.9" 7 SG12 103 79 F06 -0.63" 12 SG11 106 76 F07 +O.B6" 7 SG12 103 79 F07 +1.BB" 11 SG11 106 7B F06-1.73" 11 SG12 103 B1 F06 -0.74" 7 SG11 106 7B F07 +O.B2" 12 SG12 103 B1 F07 +1.34" 16 SG11 106 BO F07 +O.B4" 9 SG12 103 B3 F06 +0.51" 14 SG11 106 BO FOB -0.93" 7 SG12 103 B5 F07 -0.9" 11 SG11 106 B2 F07 +O.B9" 10 SG12 103 B9 F07 +O.B" 9 SG11 106 B6 F07 +1.B6" 14 SG12 103 91 F06 -1.B3" 11 SG11 106 BB FOB -0.BB" 11 SG12 103 91 F07 +0.73" 9 SG11 107 79 F07 -1.6B" 9 SG12 104 72 F06 -1.BB" 7 SG11 107 B3 F07 -0.46" 20 SG12 104 76 F06 -1.74" 9 SG11 107 B5 F07 +0.77" 9 SG12 104 7B F06 -1.64" 7 SG11 107 B7 F06 -1.72" 10 SG12 104 7B F07 +0.76" 12 SG11 107 B9 F07 +0.79" 10 SG12 104 BO F06 -1.B2" B SG11 10B 64 F07 +1.16" B SG12 104 B2 F06 -1.B2" 9 SG11 10B 74 F06 -1.B3" B SG12 104 B4 F06 +0.76" 10 SG11 10B 7B FOB -1.26" 9 SG12 104 B6 F06 -0.B" 6 SG11 10B B4 F06 -0.73" 10 SG12 104 B6 F06 +O.B3" 6 SG11 10B B4 F07 +1.B6" 9 SG12 104 BB F07-1.B1" 11 SG11 10B BB F06 -0.79" 9 SG12 104 90 F07 -1.95" 12 SG11 109 79 F06 -0.75" 10 SG12 104 92 F07 +1.9B" 7 SG11 109 79 FOB +0.73" B SG12 104 94 F07 +1.9B" 11 SG11 109 B3 F06 +0.51" 6 SG12 105 B3 F06 -0.53" 14 SG11 109 B3 F07 +0.49" 10 SG12 105 B3 F07 -0.55" 14

Page 24 of 27

S000154~R~00653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report SG11 SG12 Depth Depth SG Row Col Location

(%TW)

SG Row Col Location

(%TW)

SG11 109 83 F08 -0.58" 9 SG12 105 85 F06-1.91" 8 SG11 109 87 F06 +1.72" 9 SG12 105 85 F07 +0.71" 11 SG11 109 89 F07 +0.79" 6 SG12 105 87 F07 +0.64" 10 SG11 110 76 F07 +0.86" 10 SG12 105 89 F07 +0.83" 22 SG11 110 78 F06 -1.88" 14 SG12 105 91 F06 -1.9" 9 SG11 110 78 F07 +0.9" 11 SG12 105 91 F07 +0.83" 8 SG11 111 79 F09 +1.26" 6 SG12 105 93 F07 +0.92" 8 SG11 111 87 F07 +0.82" 11 SG12 106 76 F07 +0.97" 10 SG11 111 89 F07 +0.72" 8 SG12 106 78 F07 +0.8" 9 SG11 112 76 F07 +0.82" 10 SG12 106 82 F06 -1.78" 8 SG11 112 78 F07 +0.77" 16 SG12 106 82 F07 +0.85" 9 SG11 112 80 F06 +1.7" 10 SG12 106 84 F06 -0.78" 8 SG11 113 75 F07 +1.89" 9 SG12 106 86 F06 -0.81" 7 SG11 113 79 F06 -0.74" 16 SG12 106 86 F07 +1.82" 6 SG11 113 81 F07 +1.74" 7 SG12 106 88 F07 -1.93" 9 SG11 113 83 F06 +0.51" 7 SG12 106 90 F07 -1.45" 5 SG11 113 83 F07 -0.49" 11 SG12 106 94 F07 +1.88" 9 SG11 113 85 F07 +0.88" 6 SG12 106 96 F08 -0.87" 9 SG11 113 87 F07 +0.84" 7 SG12 107 75 F07 +1.46" 6 SG11 113 89 F07 +0.79" 11 SG12 107 77 F06 -0.67" 11 SG11 114 74 F06 -1.71" 8 SG12 107 83 F06 +0.48" 18 SG11 114 76 F07 +0.77" 9 SG12 107 83 F07 -0.6" 14 SG11 114 78 F06-1.94" 8 SG12 107 85 F07 -1.38" 15 SG11 114 78 F07 +0.82" 15 SG12 107 87 F07 +0.69" 7 SG11 114 80 F07 +0.79" 12 SG12 107 89 F07 +0.9" 8 SG11 114 82 F07 +0.93" 12 SG12 107 93 F07 -0.85" 8 SG11 115 75 F07 +1.87 7 SG12 108 72 F07 +0.81" 7 SG11 115 79 F06 -0.79" 9 SG12 108 82 F06 -1.77" 14 SG11 115 85 F07 +0.87" 9 SG12 108 82 F07 +0.67" 11 SG11 115 87 F06 -1.7" 7 SG12 108 84 F06 -0.8" 7 SG11 115 87 F07 +0.72" 11 SG12 108 84 F06 +1.24" 7 SG11 115 91 F07 +0.85" 9 SG12 108 84 F07 +1.79" 12 SG11 116 72 F06 +1.82" 10 SG12 108 86 F05 -1.34" 12 SG11 116 78 F07 +0.89" 9 SG12 108 86 F06 -0.78" 7 SG11 116 80 F07 -0.77" 7 SG12 108 88 F06 -0.78" 12 SG11 116 86 F06 -0.89" 8 SG12 108 88 F07 -1.87" 9 SG11 116 86 F07 +1.94" 13 SG12 108 90 F08 +0.8" 5 SG11 117 75 F07 +1.78" 8 SG12 109 75 F07 +1.83" 7

Page 25of27

S000154~R~00653 Calvert Cliffs CC1 R23 Rev:OOO 180-Day Steam Generator Tube Inspection Report SG11 SG12 Depth Depth SG Row Col Location

(%TW)

SG Row Col Location

(%TW)

SG11 117 79 F06 -0.82" 25 SG12 109 79 F06 -0.67" 10 SG11 117 79 F07 +1.96" 14 SG12 109 83 F06 +0.44" 9 SG11 117 83 F07 -0.42" 9 SG12 109 89 F07 +0.81" 11 SG11 117 87 F07 +0.82" 10 SG12 109 93 F05 -0.87" 5 SG11 117 95 F06 -1.25" 8 SG12 110 78 F07 +0.74" 7 SG11 117 99 F06 +0.81" 8 SG12 110 86 F06 -1.36" 20 SG11 118 78 F06 -1.56" 10 SG12 110 86 F07 +1.75" 12 SG11 118 78 F07 +0.77" 9 SG12 110 88 F06 -0.69" 7 SG11 119 83 F07 -0.46" 7 SG12 110 88 F07 +1.87 10 SG11 120 82 F04 +1.02" 9 SG12 110 90 F07 -1.91" 8 SG11 120 82 F06 +1.53" 20 SG12 110 92 F06 -0.9" 10 SG11 120 88 F06 -0.87" 9 SG12 110 94 F07 +1.86" 7 SG11 120 88 F07 +1.68" 9 SG12 111 79 F06 -0.78" 10 SG11 120 90 F06 +1.67" 7 SG12 111 79 F07 +1.89" 9 SG11 121 55 F07 +1.37" 6 SG12 111 85 F07 +0.78" 10 SG11 121 79 F07 +1.97" 6 SG12 111 87 F07 +0.71" 11 SG11 121 83 F06 +0.54" 7 SG12 111 89 F07 +1.34" 24 SG11 123 67 F06 +1" 7 SG12 111 95 F07 +1.41" 8 SG11 123 81 F07 +1.76" 8 SG12 112 78 F07 +0.71" 7 SG11 123 83 F06 -0.44" 9 SG12 112 86 F06 +0.81" 6 SG11 124 58 F07 -0.51" 8 SG12 112 88 F06 -0.83" 7 SG11 124 88 F08 +0.75" 5 SG12 112 88 F07 -1.99" 7 SG11 125 81 F08 +0.82" 7 SG12 112 90 F05 +1.36" 8 SG11 125 93 F07 +1.54" 7 SG12 112 92 F06 +1.82" 5 SG11 127 81 F06 -1.31" 9 SG12 113 83 F06 +0.51" 10 SG11 127 91 F06 +0.88" 12 SG12 113 83 F07 +0.46" 7 SG11 127 91 F09 +1.82" 9 SG12 113 87 F07 +0.72" 7 SG11 128 88 F06 +1.7" 4 SG12 114 76 F06 -1.82" 5 SG11 128 104 F08 -1.33" 11 SG12 114 80 F06 -1.83" 9 SG11 129 81 F05 -0.67" 6 SG12 114 82 F06 -1.89" 7 SG11 129 81 F07 -1.81" 8 SG12 114 90 F09 +1.8" 5 SG11 129 81 F07 +1.37" 7 SG12 114 92 F06 +1.87 7 SG11 130 78 F07 -1.07" 8 SG12 115 77 F06 -0.73" 6 SG11 130 92 F03 -0.8" 6 SG12 115 83 F06 +0.51" 9 SG11 130 92 F03 +1.45" 5 SG12 115 85 F07 +0.73" 10 SG11 130 92 F05 +1.42" 10 SG12 115 85 F08 +1.76" 7 SG11 130 100 F06 +1.12" 9 SG12 115 87 F07 +0.8" 10 SG11 131 101 F07 +1.96" 11 SG12 116 84 F06 -0.82" 10

Page 26 of27

8000154-IR-100653 Calvert Cliffs CC1 R23 Rev: 000 180-Day Steam Generator Tube Inspection Report SG11 SG12 Depth Depth SG Row Col Location

(%TW)

SG Row Col Location

(%TW)

SG11 132 76 F07 +0.84" 7 SG12 116 84 F07 +1.85" 8 SG11 132 90 F07 +1.42" 6 SG12 116 86 F06 -0.73" 12 SG11 132 90 F08 +1.38" 5 SG12 116 86 F07 +1.85" 12 SG11 135 67 F02 +0.91" 7 SG12 116 88 F06 -0.82" 11 SG12 116 92 F06 +1.32" 9 SG12 117 79 F07 +1.84" 8 SG12 117 81 F07 +1.76" 6 SG12 117 89 F07 +1.26" 12 SG12 118 76 F06-1.78" 7 SG12 118 82 F06 -1.89" 6 SG12 118 88 F07 +1.14" 7 SG12 118 92 F06 +1.21" 8 SG12 120 80 F07 -1.76" 11 SG12 120 84

F06 -0.71" 9 SG12 121 81 F07 +1.85" 5 SG12 121 83 F06 +0.49" 8 SG12 121 85 F06 -1.78" 15 SG12 121 87 F07 +0.81" 6 SG12 123 79 F07 +1.37" 6 SG12 123 87 F07 +0.78" 7 SG12 124 82 F03 -0.78" 9 SG12 124 82 F05 -1.36" 8 SG12 126 86 F07 +1.74" 5 SG12 127 79 F07 +1.2" 6 SG12 128 80 F06 -1.29" 12 SG12 128 80 F06 +1.31" 6 SG12 128 80 F07 -1.33" 16 SG12 128 80 F08 -1.38" 8 SG12 128 80 F08 +1.29" 5 SG12 132 88 F05 +1.34" 11 SG12 132 88 F06 +1.36" 19 SG12 132 88 F08 -1.25" 7 SG12 132 102 F07 +1.2" 11 SG12 136 92 F08 -1.03" 5

Page 27 of 27

ML16243A479

Text

1.0 INTRODUCTION

3.0 REFERENCES

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