ML17263A244

Rev 0 to Summary Exam Rept for 1993 SG Eddy Current Insp at Re Ginna Nuclear Power Station.

ML17263A244
Person / Time
Site:	Ginna
Issue date:	04/15/1993
From:	DAVISON M J, GEIKEN G W, SAPORITO M J ROCHESTER GAS & ELECTRIC CORP.
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ML17263A243	List: ML17263A242 ML17263A244
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NUDOCS 9304260281
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ROCHESTER GAS AND ELECTRIC CORPORATION 89 East Avenue, Rochester, NY 14649 MATERIALS ENGINEERING AND INSPECTION SERVICES

SUMMARY

EXAMINATION REPORT FOR THE 1993 STEAM GENERATOR EDDY CURRENT INSPECTION AT R.E.GINNA NUCLEAR POWER STATION REVISION 0 13 April 1993 PREPARED BY: Michael J.avison Engineering Assistant-NDE Materials Engineering and Inspection Services REVIEWED BY: Gerald W.Geiken Supervisor Materials Engineering and Inspection Services APPROVED BY: Michael J.Saporito Manager Materials Engineering and Inspection Services DATE://~930426028i 9304i9 PDR ADOCK 05000244 8 , PDR TABLE OF CONTENTS

1.0 INTRODUCTION

2.0 DATA AC UISITION PROGRAM 3.0 DATA ANALYSIS RE ULTS

SUMMARY

45 5.0 CORRECTIVE ACTION 50 Figure 1 Figure 2 Figure 3 52 59 Table 1 Table 2-A Table 2-B Table 3 Table 4-A Table 4-B Table 5 14 31 46 53 60 68

1.0 INTRODUCTION

The following is a summary report of the results of the multifrequency eddy current examination performed during the 1993 Annual Refueling and Maintenance Outage at the R.E.Ginna Nuclear Power Station in Ontario, New York.The examinations were performed in both the"A" and".B" recirculating steam generators which are Westinghouse Series-44 design.Each generator contains 3260 Inconel 600 Mill Annealed U-Bend tubes having an outside diameter of 0.875" and a nominal wall thickness of 0.050".The purpose of the eddy current examination was to assess any corrosion or mechanical damage that may have occurred during the cycle since the 1992 examination.

Particular attention was given to the detection of: 1)Intergranular attack (IGA)and intergranular stress corrosion cracking (IGSCC)within the inlet tubesheet crevice region.2)Intergranular attack (IGA)and intergranular stress corrosion cracking'I (IGSCC)within the outlet tubesheet crevice region (none detected).

3)Primary water stress corrosion cracking (PWSCC)at the inlet tubesheet roll transition.

4)Primary water stress corrosion cracking (PWSCC)at the outlet tubesheet roll transition (none detected).

Page 1 of 73 5)Pitting and wastage between the tubesheet and first support plate.6)Wear at the antivibration bar to tube intersections in the U-bend region.7)Denting at tube support intersections.

8)Primary water stress corrosion cracking (PWSCC)in the Row 1 and Row 2 U-bend area (none detected).

9)Intergranular attack (IGA)and intergranular stress corrosion cracking (IGSCC)at hot leg support plate intersections (none detected).

10)Stress corrosion cracking (SCC)at the tube support plate regions with dents (none detected).

The examination was performed by personnel from Rochester Gas and Electric (RGdkE)and Allen Nuclear Associates, Inc.(ANA).All personnel were trained and qualiTied in the eddy current examination method and have been certified to a minimum of Level I for data acquisition and Level II for data analysis.All examination activities were performed in accordance with MEIS NDE-500-series procedures.

In addition, all acquisition personnel were trained and qualified to site specific procedures and all analysis personnel were trained and qualified to the site specific"Steam Generator Data Analysis Guidelines-RG&E Ginna Station".These analysis guidelines Page 2 of 73 were prepared in accordance with Revision 2 of the Electric Power Research Institutes (EPRI)"PWR Steam Generator Inspection Guidelines".

The data analysis was performed by two independent teams.Both teams performed their analysis manually utilizing the Zetec EDDYNET Data Analysis System.The results of these two analyses were compared for discrepancies using the EDDYNET compare program.The typical data flow chart is shown on Figure 1 (Page 5).The following list describes some typical discrepancies between analysis teams requiring resolution by the Level III resolvers.

Any indication that is reported as>20%by either team and is not reported by the other team or is sized at>10%difference.

Any indication spanning the repair limit, (39%vs.41%).Any difference of>1 inch in the axial location of a flaw.o Any tube which was analyzed by one team but not the other (may have been missed or improperly entered by one analysis team).o Any difference in the reported test extent.o All indications identified as IGA and/or SCC regardless of whether one or both parties have reported it.Page 3 of 73 o Any tube reported as restricted by one team but not the other (may have been missed or improperly entered by one analysis team).o Any tube for which a retest was requested by one team but not the other.o All Roll Transition Indications reported by one team but not the other.In addition to the above, all tubes requiring repair whether reported by one or both teams were reviewed by the resolvers.

In all cases, the removal of a repairable indication from the data base received the concurrence of two Resolution personnel.

Page 4 of 73 e

Typical Beta Flow Chart Rau Oats PrlearM Rna lMs is Secondary RnalMsis Coaosr i on of'esults Oo Results Retiree P Ro An't Reps irab le Yes Indi cat tons Resolut ton Oats Management Eddy Current I.evei III Rev)eu lt eahl 6~nerntor 6rouo~Fi ure 1 Page 5 of 73

2.0 DATA AC UISITION PROGRAM The initial eddy current examination of the"A" and"B" steam generators was performed utilizing a standard bobbin coil technique with data acquisition being performed with the EDDYNET Acquisition System.The frequencies selected were 400, 200, 100 and 25 kHz.The examination was performed primarily through the 1st tube support through the tubesheet region to examine open crevice, roll transition regions, and the area between the top of the inlet tubesheet to the 1st tube support plate.20%of all open tubes were also examined throughout the full length of tubing.Additional eddy current examinations of the"A" and"B" steam generators were performed utilizing the Zetec 3-coil Motorized Rotating Pancake Coil (MRPC)probe to examine the roll transition region, selected crevices and support plates.The frequencies used for these examinations were 400, 300, 100, and 25 kHz.All row 1 and 2 U-bends were also examined with MRPC.During the 1992 eddy current examination, the full crevice region was evaluated utilizing the Motorized Rotating Pancake Coil (MRPC)technique with subsequent bobbin examinations being performed in all tubes identified Page 6 of 73 by MRPC as having repairble indications in B S/G/Evaluations of the bobbin data indicated that the bobbin technique is capable of detecting all crevice indications detected by MRPC except those located at or in close proximity to the roll transition.

As a results of these bobbin evaluations and discussion with Mssrs.Emmett Murphy and Al Johnson of the U.S.Nuclear Regulatory Commission on October 28, 1992, RGAE concluded that standard bobbin examination of the crevice region with ensuing substantiation by MRPC and a 100%MRPC examination of the roll transition region in 1993 would provide repairble indication detection capability comparable to the 100%crevice MRPC examination employed in 1992.Prior to the examination of the steam generators, an inspection program was established for the inlet and outlet sides of both the"A" and"B" steam generators.

The inlet or hot leg examination program plan was generated to provide the examination of 100%of each open/unsleeved steam generator tube from the tube end through the first tube support plate, along with 20%of these tubes being selected and examined for their full length (20%random sample as recommended in the Electric Power Research Institute (EPRI)guidelines) with the bobbin coil.In addition, 20%of each type of sleeve was examined and the remaining tube examined full length.All Row 1 and Row 2 U-Bend regions were examined with the Motorized Rotating Pancake Coil (MRPC)between 06H and 06C from the cold leg side.Page 7 of 73 A number of supplemental examina'tions were also performed to assist in flaw characterization and confirmation and to continue to monitor for the onset of new damage mechanisms.

Table 1 is a breakdown, by steam generator, of all tubes programmed for examination, numbers examined and the extent examined.Page 8 of 73 STEAM GENERATOR"A" 1993 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION Total Tubes Out of Service Sleeved Tubes Open Unsleeved Tubes 3260 185 555 2520 REQ'D MIN'UMBER NUMBER PERCENT PROGM'D INSPT'D COMPLETE'ot Leg to 1st TSP 2520 Previous Ind.>20%Sleeves Deplugged Tubes (F/L)81 117 Full Length (20%Random)696 Roll Transition MRPC 2520 U-Bend MRPC (Rows lk 2)165 2520 696 2520 165 81 117 2520 696 2520 165 81 117 100.0%100.0%100.0%100.0%100.0%100.0%0.0%Table 1'er Appendix B requirement.

Complete=Tubes inspected/Required Minimum.Page 9 of 73 STEAM GENERATOR"B" 1993 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION Total Tubes Out of Service Sleeved Tubes Open Unsleeved Tubes 3260 313 1134 1813 REQ7D NUMBER NUMBER PERCENT M~ME E'ot Leg to 1st TSP 1813 Previous Ind.)20%Sleeves Deplugged Tubes (F/L)27 232 48 Full Length (20%Random)416 Roll Transition MRPC 1813 U-Bend MRPC (Rows 1 4 2)144 1813 416 1813 144 27 232 48 1813 416 1813 144 232 48 100.0%100.0%100.0%'00.0%100.0%100.0%100.0%Table 1 (Cont'd)'er Appendix B requirement.

Complete=Tubes Inspected/Required Minimum.Page 10 of 73 3.0 DATA ANALYSIS RESULTS SUMIVIARY The data analysis was performed using the Zetec EDDYNET System (Version 20).For the MRPC examinations, all data was reviewed by displaying the 400 kHz or 300 kHz pancake coil data on the CRT along with the vertical component of the pancake and axial sensitive coils in strip chart form.Other frequencies and coils were selected as necessary for the evaluation of indications.

No depth sizing was performed with the MRPC data.Any tube containing a flaw detected by the MRPC examination was repaired.For the bobbin coil examination, all data was reviewed by displaying the 400 kHz data on the CRT along with the vertical component of the differential and absolute mix outputs in strip chart form (where applicable).

Other frequencies and their components were selected as necessary for the evaluation of indications.

All recordable indications were logged into the computer and stored on optical disk.The final report form summarizing all indications

)20%TW (including IGA and PWSCC which is assumed to be)20%)for each generator can be found in Table 2.An explanation of the abbreviations and nomenclature used on these lists has been compiled for ease of interpretation.

Page 11 of 73 LIST OF)20%INDICATION AND CREVICE INDICATION NOMENCLATURE To of List Information ROW-ROW number from the tube identiTication.

COL-Column number from the tube identification, VOLTS-Amplitude of the measured indication signal response.IND.DESC.-

%TWD-INDICATION LOCATION-Type of damage mechanism.

Percent through wall depth or code for non-measurable indications.

Reference point from which the indication was measured along with axial distance from that reference point.Information Under IND.DES ADI-Absolute Drift Indication Signal which is indicative of IGA.ADS-Absolute Drift Signal which may be indicative of IGA.CRI-Circumferential Roll Traiisition Indication CCI-Circumferential Indication not at the Roll Transition (B&W Plugs)DFI'-De-Plugged Tube DRT-Distorted Roll Transition may be indicative of PWSCC.DRI-Distorted Roll Indication indicative of PWSCC.MAI-Multiple Axial Indication

-MRPC identified or veriTied crevice indication(s).

MRI-Multiple Roll Indiciition

-MRPC identified or verified axial roll transition indication(s).

NQI-Non-Quantifiable Indication

-Differential signal indicative of SCC NQS-Non-QuantiTiable Indication

-Differential signal which may be indicative of SCC.PTF-Parent Tube Flaw SAI-Single Axial Indication

-MRPC identified or verified crevice indication.

SCC-Stress Corrosion Cracking SRI-Single Roll Indication

-MRPC identilied or verified axial roll transition indication.

Page 12 of 73 LIST OF)20%INDICATION AND REVICE INDICATION NOMENCLATURE CON'T Information Under%TWD XX%-The measured percent TW depth of the indication.

Information Under INDI ATION LO ATION TEH-TSH-Hot Leg Tube End (Bottom).Top of inlet tubesheet, TSP-Tube Support Plate TEC-Cold Leg Tube End (Bottom).TSC-Top of outlet tubesheet.

AVB-Antivibration Bars (Numbered from Hot Leg to Cold Leg).-XX.X-Axial distance below the secondary face of the tubesheet or support plates where the indication is located.+XX.X-Axial distance above the primary or secondary face of the tubesheet or support plates where the indication is located.OXH-Tube Support Plate Location Hot Leg 1-6 OXC-Tube Support Plate Location Cold Leg 1-6 Page 13 of 73

R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 6 2 4 3 6 3 13 3 7 4 11 4 13 4 2 5 0.6 1.7 0.7 1.6 1.2 0.4 0.7 2.1 1.5 0.6 ADS SRI SRI ADS MRI ADS ADS SRI SRI ADS TEH+20.9 TEH+2.1 TEH+1.9 TEH+10.4 to+14.2 TEH+2.2 TEH+5.8 TEH+9.8 TEH+2.3 TEH+2.5 TEH+14.6 3 5 10.9 3.7 15 5 1.6 17 6 1.6 21 6 0.8 15 7'.6 6 8 2.3 2 9 2.7 6 9 2.5 12 10 0.8 5 11 2.9 3 12 1.8 16 12 0.3 26 14 5.3 2 16 0.7 SBI SBI ADS ADS ADS ADS MRI SRI SRI MRI MRI SRI MRI SAI 21 TEH+0.1 TEH+0.4 TEH+7.4 TEH+11.9 TEH+2.9 TEH+4.3 TEH+1.7 TEH+1.7 TEH+1.7 TEH+2.5 TEH+2.4 TEH+2.4 TSH+1.3 TEH+2.2 TEH+3.3 Table 2-A Page 14 of 73 4

R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.4TWD Desc Ginna Station Indication Location 10 16 19 16 9 17 12 17 21 17 25 17 10 18 29 18 4 19 13 19 14 19 16 19 24 19 33 19 7 20 11 20 12 20 14 20 15 20 0.8 0.9 0.3 4 4 2.3 0.7 0.7 0.5 0.8 0.4 1.6 4.2 3.6 0.9 1.2 1.7 3.0 0.9 3.0 7.2 2.6 1.2 0.5 1.8 0.8 MAI SRI SRI SAI SAI SAI MAI ADS SRI SAI ADS SAI SRI MBS NQI ADS SAI 93 93 20 80 20 32 25 23 TEH+2.8 TEH+3.2 TEH+8.8 TEH+3.0 TEH+2.3 TSH+1.6 TEH+3.3 TEH+2.6 to+3.5 TEH+3.9 TEH+7.2 TEH+8.7 TEH+14.6 TEH+2.1 TSH+0.8 TSH+0.8 TEH+5.0 TEH+6.7 TEH+3.3 TEH+2.3 TEH+0.8 TSH+2.3 TSH+2.0 TEH+3.2 TEH+6.4 TEH+2.8 Table 2-A Page 15 of 73 e

R.G.&~E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 1 21 25.5 10.6 3.8 SBI SBI SRI TEH+0.3 TEH+0.3 TEH+2.7 4 21 8 21 10 21 11 21 13 21 14 21 15 21 16 21 17 21 22 21 24 21 38 21 3 22 10 22 11 22 12 22 14 22 15 22 1.8 5.7 3.0 8.9 5.4 4.1 3.3 4.3 6.6 5.5 2.6 5.1 1.8 0.8 0.6 1.2 0.8 1.3 0.9 0.3 2.4 1.4'.8 5.0 6.2 8.6 5.0 ADS ADI ADI CRI CRI CRI MAI ADS SAI ADS SAI NQS ADS 23 39 27 22 24 29 25 32 26 24 26 25 24 23 TEH+6.8 TSH+2.0 TSH+2.0 TSH+2.2 TSH+2.1 TEH+4.6 TEH+10.7 TSH+1.6 TSH+1.3 TSH+1.1 TEH+1.8 TSH+0.9 TEH+2.3 TEH+2.3 TEH+5.0 TEH+8.4 TEH+8.6 TEH+9.6 TEH+4.1 TEH+4.3 AV3+0.0-TEH+18.1 TSH+3.0 TSH+2.5 TSH+2.2 TSH+2.6 TSH+1.8 Ta e 2-A Page 16 of 73 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 16 22 17 22 18 22 6.3 1.6 7.2 1.4 1.7 2.2 5.7 CRI SAI SAI ADI 22 22 28 TSH+1.5 TEH+2.2 TSH+1.5 TEH+2.7 TEH+3.8 TEH+6.4 TSH+1.0 23 22 3.0 25 22 0.9 10 23 6.3 13 23 16.4 28 23 2.7 10 24 2.6 11 24 5.2 2.4 12 24 7.6 13 24 10.2 26 24 2.5 39 24 2.5 12 25 7.2 13 25 0.3 9.2 14 25 14.6 17 25 11.2 39 25 5.7 9 26 2.8 ADS ADS SRI NQS MRI SRI 28 20 32 21 22 21 21 27 20 24 29 34 29 TSH+0.5 TEH+9.2 TSH+2.3 TSH+3.0 TEH+3.8 TSH+1.8 TSH+2.0 TSH+2.4 TSH+2.7 TSH+2.7 TSH+0.9 TEH+2.9 TSH+2.0 TEH+8.3 TSH+2.3 TSH+2.5 TSH+2.2 TEH+2.8 TEH+2.7 Table 2-A Page 17 of 73

R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 24 26 17 27 25 27 6 28 13 28 23 28 24 28 26 28 34 28 12 29 14 29 15 29 6 30 12 30 23 30 24 30 28 30 14 31 16 31 23 31 1.4 1.9 6.6 6.1 0.5 4.1 0.4 0'0.8 6.5 1.7 8.1 0.4 0.3 1.0 5.5 5.9 1.8 1.3 5.1 6.7 0.5 1.9 0.4 2.4 5.3 ADS MAI ADS SAI SAI SRI SAI SRI ADS ADS ADS MRI ADS 12 32 20 25 29 21 25 23 20 26 27 29 29 TEH+7.1 TSH+1.2 TSH+2.3 TSH+2.9 TEH+3.9 TEH+4.7 TEH+4.1 TEH+4.6 TEH+2.6 TSH+2.3 TSC+2.3 TSH+1.1 TEH+3.9 TEH+2.5 TEH+7.9 TEH+3.4 TSH+3.0 TEH+17.1 TSC+2.5 TSH+1.4 TSH+1.4 TEH+2.6 TEH+4.9 TSH+1.4 TSC+2.9 TSH+2.4 Table 2-A Page 18 of 73 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 24 31 25 31 26 31 27 31 39 31 1 32 14 32 20 32 22 32 23 32 24 32 8 33 14 33 0.5 0.8 2.3 0.4 1.2 3.0 F 1 13.8 9.9 0.5 11.4 0.4 1.0 5.4 MAI SAI SAI MRI 23 ADS ADI 31 27 28 SRI 24 SRI MAI ADI TEH+3.3 TEH+3.0 TSC+1.2 TEH+3.0 TEH+2.8 TEH+3.9 TEH+17.3 TSH+2.8 TSH+2.0 TSH+2.2 TEH+2.6 TSH+1.6 TEH+2.5 TEH+2.5 TEH+3.9 to+5.3 19 33 3.0 2.5 6.4 ADI ADI 25 TEH+3.5 TEH+15.7 TSH+2.8 25 33 40 33 43 33 2.7 1.9 1.3 21 33 6.2 22 33 11.8 23 33 9.9 24 33 , 8.6 ADS ADS MBM 25 26 28 28 TSH+1.8 TSH+2.3 TSH+2.1 TSH+1.6 TEH+4.2 TEH+10.8 06H+0.5 Table 2-A Page 19 of 73 R.G.&E.Row Col Volts SG/A 93NAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 7 34 11 34 16 34 25 34 31 34 12 35 19 35 20 35 22 35 23 35 25 35 35 35 36 35 20 36 21 36 26 36 1 37 17 37 18 37 22 37 0.5 9.1 0.7 1.7 9.6 0.9 2.3 5.6 2.2 5.7 6.2 6.6 3.2 0.9 0.4 1.5 F 1 5.9 7.0 1'4.3 2.9 3.9 5.9 SRI ADS ADS ADS ADS SRI ADS SAI SRI ADS 56 26 26 23 21'5 26 25 21 29 78 79 21 22 TEH+2.5 TEH-+5.6 TEH+5.2 TEH+12.2 TSH+1.7 TEH+5.7 TEH+8.0 TSH+2.4 TSH+2.3 TSH+1.5 TSH+2.3 TSH+1.9 TEH+2.7 TEH+9.3 TEH+3.8 TSH+2.8 TEH+2.7 TSH+2.0 TSH+1.5 TEH+3.2 TEH+7.6 TEH+9.1 TSH+2.8 TSH+1.8 Table 2-A Page 20 of 73 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 24 37 2.1 7.8 26 37 34 37 5 38 23 38 25 38 26'8 12 39 18 39 20 39 22 39 23 39 25 39 26 39 34"39 6 40 15 40 18 40 21 40 24 40 4.9 3.9 1.6 1.6 1.6 1.4 9.3 8.4 0.5 1.5 1.2 2.7 0.6 2.3 6.5 10.3 0.8 3.2 1.6 1.0 0.9 1.5 4.1 2.6 25 37 10.1 5.9 MRI SRI SAI ADS SRI CRI 20 26 24 26 25 27 22 20 27 22 21 21 24 23 31 23 22 21 22 23 22 26 a e2-TEH+2.5 TSH+2.4 TSH+1.3 TSH+2.2 TSH+1.4 TSH+2.2 TEH+2.3 TSH+0.3 TSH+1.8 TSH+2.3 TSH+1.4 TSH+1.8 TSH+1.4 TSH+2.6 TSH+0.3 TSH+1.2 TSH+0.6 TSH+1.0 TSH+2.2 TSH+2.5 TEH+5.5 TEH+7.1 TEH+2.3 TEH+2.2 TSH+2.0 TSH+2.6 TSC+1.9 TSH+1.6 Page 21 of 73

R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.4TWD Desc Ginna Station Indication Location 26 40 27 40 2 41 11 41 20 41 22 41 24 41 25 41 26 41 29 41 34 41 2 42 3 42 23 42 24 42 26 42 27 42 29 42 31 42 32 42 9.4 9.6 0.9 0.9 1.3 0.8 1.0 1.4 3.9 8.3 5.9 2.1 2.8 2.3 1.8 1.3 1.3 2.4 1.4 6.3 5.6 3.8 5.5 0.8 0.6 1.0 SRI SRI SRI ADS CRI CRI SRI 22 23 20 20 22 20 25 21 22 24 29 28 22 23 20 23 24 71 64 TSH+2.4 TSH+2.3 TEH+2.3 TEH+2.4 TSC+2.1 TSH+0.9 TSH+1.3 TSH+1.7 TSH+1.1 TSH+1.8 TSH+2.2 TSH+2.5 AV2+0.0 TEH+2.3 TEH+F 1 TEH+2.3 TEH+2.3 TSH+1.1 TSH+0.4 TSH+1.8 TSH+2.1 TSH+1.1 TSH+1.9 TEH+2.7 TEH+4.6 TEH+2.3 Table 2-A Page 22 of 73 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.4TWD Desc Ginna Station Indication Location 37 42 1 43 4 43 16 43 0.6 1.8 3.7 1.1 0.7 2.7 2.1 0.6 0.9 1.9 4.5 1.3 1.3 21 34 AVW AVW 28 24 SAI ADS SRI CRI CRI AV1+0.0 AV1+0.0 AV2+0.0 AV2+0.0 AV3+0.0 AV3+0.0 AV4+0.0 AV4+0.0 TEH+5.0 TEH+5.4 TEH+2.7 TEH+2.3 TEH+2.3 20 43 22 43 24 43'7 43 28 43 45 43 18 44 28 44 29 44 31 44 32 44 19 45 29 45 0.7 1.6 0.4 2.2 3.5 8.3 0.6 1.3 0.7 3.8 4 4 0.7 0.8 3.5 SRI SRI CRI SAI 24 21 21 25 23 35 20 21 30 33 TSH+2.1 TSH+0.7 TEH+2.3 TSH+1.4 TSH+1.8 TSH+1.8 TSH+10.4 TSH+2.7 TEH+2.3 TSH+1.6 TEH+2.3 TEH+2.9 TSH+3.6 TSH+0.9 Table 2-A Page 23 of 73 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.:TWD Desc Ginna Station Indication Location 30 45 31 45 17 46 19 46 25 46 26 46 30 47 14 48 30 48 33 48 17 49 20 49 28 49 14 50 17 50 23 50 25 50 27 50 29 50 30 50 6.7 1'2.0 2.1 1.8 0.6 7.0 4.5 7.6 4.2 5.0 0.7 2.9 5.7 0.9 1.9 3.0 2.7 5.1 1.7 1.1 0.7 0.9 2.0 2.4 0.'3 MRI ADS CRI ADS SAI ADS 16 ,ADS ADS MAI ADS CRI SAI NQI 30 31 23 30 20 22 22 31 28 20 28 TEH+2.7 TSH+1.1 TEH+4.1 TEH+2.3 TEH+11.8 TSH+0.8 TSH+1.2 TSH+1.4 TSH+0.8 TEC+3.5 TSH+1.0 TEH+4.4 TEH+7.3 TSH+0.5 TSH+1.4 TEH+4.6 TEH+12.1 TEH+17.7 to+19.3 TEH+20.2 TEH+2.3 TSH+0.6 TEH+3.0 TEH+3.0 TSH+1.4 TSH+0.5 TSH+1.2 Table 2-A Page 24 of 73 0 0 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 32 50 43 50 19 51 25 51 13 52 18 52 2 53 13 53 19 53 23 53 28 53 29 53 18 54 2'6 54 42 54 17 55 26 56 8 57 22 57 23 57 1.4 1.3 0.9 0.7 1.2 1'5.6 3.9 4.5 2.5 0.8 1.4 1.3 1.3 0.5 1'0.6 3.3 3.1 3.8 3.8 2.5 1.2 F 1 4.7 10.0 3.7 SAI ADS SAI SAI AVW AVW ADI ADI CRI CRI CRI SAI ADS t CRI ADS SAI ADS ADS 21 29 28 97 24 31 32 21 TEH+5.0 TEH+6.6 TEH+12.6 TEH+13.4 AV1+0.0 AVl+0.0 TSH+1.5 TEH+4.3 TSH+1.7 TEH+19.2 TEH+2.2 TEH+2.2 TSH+1.6 TEH+2.3'EH+4.1 TEH+5.1 TEH+4.5 TSH+0.7 TSH+2.7 TEH+2.3 TEH+8.9 TSH+3.5 TEH+16.0 TEH+16.3 TEH+5.8 TSH+1.4 TSH+1.4 Table 2-A Page 25 of 73 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.:TWD Desc Ginna Station Indication Location 37 57 0.5 0.5 1.9 0.6 0.6 2.2 0.9 0.9 3.4 AVW AVW 22 AVW AVW 24 AVW AVW 32 AV2-0.0 AV2-0.0 AV2+0.0 AV3+0.1 AV3+0.1 AV3+0.0 AV4+0.1 AV4+0.1 AV4+0.0 1 58 24 58 26 58 38 58 2 59 9 59 15 59 17 59 24 59 25 59 1 60 20 60 13 61 17 61 19 61 20 61 24 61 29 61 6.4 3.8 3.0 2.1 2.3 1.6 6.8 3.2 3.3 1.8 12.4 3.0 4.7 3.8 4.5 2.8 4.5 3.1 1.7 1.5 1.5 ADS CRI SRI ADS ADS ADS AVW AVW 23 32 22 20 20 23 21 35 20 27 20 20 20 TEH+7.5 TSH+1.8 TEH+2.2 TEH+2.4 TEH+5.4 TSH+0.4 TSH+2.5 TSH+2.2 TSH+1.9 TSH+1.2 TEH+12.7 TSH+1.5 TSH+1.4 TSH+1.9 TSH+1.6 TEH+2.9 TSH+1.5 TSH+1.0 AV3+0.0 AV3-0.1 AV3-0.1 Ta e 2-A Page 26 of 73 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.~TWD Desc Ginna Station Indication Location 15 62 18 62 19 62 20 62 3 63 ,4 63~5 63 18 63 19 63 28 63 31 63 1 64 2 64 7 64 13 64 16 64 19 64 32'4 ll 65 13 65 15 65 6.8 3.5 2.5 2.3 3.7 7.0 4.3 1.0 1.3 2.3 4.1 4.7 6.5 0.4 1.9 0.5 4.6 2.0 5.3 0.7 8.6 0.9 4.1 3.6 5.4 MRI ADS ADS ADS ADS ADS ADS AVW MRI SRI ADS ADS SRI NQS 21 20 23 22 20 23 21 22 22 20 26 TSH+1.9 TEH+6.2 to+15.3 TEH+9.3 TEH+18.0 TSH+1.5 TSH+l.5 TSH+1.4 TEH+4.6 TEH+4.4 TEH+8.1 TEH+7.8 TSH+1.5 TSH+1.4 AV3+0.4 TEH+2.4 TEH+3.0 TEH+9.1 TEH+4.4 TSH+1.6.TEH+2.5 TSH+1.5 01H-0.3 TSH+0.9 TSH+1.3 TSH+1.5 Table 2-A Page 27 of 73 0 II

~~~R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 17 65 12 66 13 66 14 66 15 66 18 66 19 66 21 66 11 67 19 67 24 67 26 67 35 67 38 67 3 68 8 68 13 68 19 68 27 68 2 69 3 69 7 69 8 69 1.8 3.8 7.9 5.5 7.3 7.3 9.7 2~1 4.7 4.9 1.0 0.5 1.0 1.4 1.3 6.9 4'3.6 0.9 0.6 0.9 0.4 4.8 ADS SRI SRI SRI SRI SRI ADS SRI SRI SRI 26 22 28 23 28 22 22 21 23 21~21 25 20 TEH+11.5 TSH+1.4 TSH+1.4 TSH+1.9 TSH+1.8 TSH+1.8 TSH+1.8 TSH+1.6 TSH+1.5 TSH+1.8 TEH+2.3 TEH+2.2 TEH+2.3 TEH+2.3 TEH+2.6 TSH+0.9 TSH+1.6 TEH+3.5 TEH+2.1 TEH+2.3 TEH+3.2 TSH+1.5 TSH+0.7 Table 2-A Page 28 of 73 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.CTWD Desc Ginna Station Indication Location 12 69 16 69 22 69 27 69 31 69 38 69 11 70 14 70 21 70 38 70 12 72 17 72 20 72 37 72 8.0 1.3 0.7 0.9 1.4 0.5 0.8 1.3 4.8 0.2 1.9 0.7 0.7 2.0 3.9 3.8 0.4 0.2 0.5 2.1 0.5 0.3 0.3 SRI ADS SRI SRI SRI ADI AVW AVW CRI NQI NQS AVW AVW AVW AVW 22 20 21 22 56 23 22 24 TSH+1.6 TEH+2.5 TSH+1.5 TEH+6.8 TEH+2.2 TEH+2.3 TEH+2.3 TSH+1.5 TSH+1.8 TEH+3.5 TEH+4.6 AV2+0.0 AV2+0.0 AV2+0.0 TSH+1.4 TEH+2.5 TEH+3.9 TEH+4.1 AV2+0.0 AV2+0.0 AV2+0.0 AV3+0.0 AV3+0.0 8 73 1.9 12 73 10.1 13 73 1'8 74 , 5.1 12 74 4.9 SRI 24 26 23 20 TSH+0.9 TSH+1.2 TEH+2.8 TSH+0.7 TSH+1.1 Table 2-A Page 29 of 73 P~, 0 R.G.&E.Row Col Volts SG/A 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc Ginna Station Indication Location 20 80 14 82 7 83 10 83 12 84 23 86 16 87 3.4 1.4 5.6 1.3 5.4 0.3 0.8 13 74 1.5 7 75 3.5 10 75 3.5 5 78 1.1 8 78 0.7 12 78 0.6 9 80 1.0 11 80 , 0.7 0.7 SRI SRI SRI SAI SRI SAI SAI ADI SRI SRI ADS MRI NQS 23 23 32 TSH+1.1 TEH+2.5 TSH+1.1 TEH+2.6 TEH+2.4 TEH+2.8 TEH+2.3 TEH+2.7 TEH+2.8 TEH+4.0 TEH+2.4 TEH+2.4 TEH+4.1 TEH+1.8 01H-0.8 TSH+12.1 Number of Tubes: 336 Number of Indications:

437 Table 2-A Page 30 of 73 I

R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.4TWD Desc GINNA STATION Indication Location 2 1 3 1 9 2 6 3 8 3 12 3 13 3 14 3 12 4 12 5 13 5 14 5 18 5 3 8 15 8 20'5 9 21 9 4 10 15 10 13 11 1.2 0.5 1.0 0.8 2.3 4.1 0.6 2.5 2.0 2.7 1.8 1.7 1.6 2.3 1'0.7 0.8 1.4 0.6 0.7 0.6 1.2 0.6 0.5 ADS ADS SRI ADS ADS MBS ADS ADS MBS MBI ADI ADS ADS ADS ADS SAI ADS ADS ADS ADS NQS SAI SAI ADS ADS Ta e 2-B TEH+15.8 TEH+14.4 TEH+2.7 TEH+19.6 TEH+5.8 TEH+0.4 TEC+6.1 to+15.6 TEH+15.2 TEH+0.6 TEH+0.6 TEH+4.8 TEH+7.0 TEH+13.6 to+6.1 TEH+15.0 TEH+3.6 TEH+4.5 TEH+3.1 TEH+9.9 TEH+7.2 TEH+9.7 TEH+4.1 TEH+4.1 TEH+5.1 TEH+4.0 TEH+11.8 Page 31 of 73 R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc GINNA STATION Indication Location 14 11 14 12 29 12 2 13 6 13 3 16 10 16 28 16 10 17 14 17 15 17 32 17 14 18 16 18 26 18 5 19 22 19 25 19 26 19 33 19 0.5 1.2 1'0.3 1.9 1.6 0.5 1.5 0.3 0.4 0.4 5.5 0.1 0.5 0.1 0.7 0.7 0.9 0.2 2.0 0.2 2.0 1.0 3.1 ADS ADS SRI MAI ADI ADS SAI ADS ADS ADS ADS ADS NQS SAI NQS SRI MAI NQS SRI NQS SRI MRI MRI ADS 22 23 TEH+6.0 TEH+20.0 TEH+3.1 TEH+3.5 to+5.3 TEH+4.9 TEH+3.6 TEH+8.0 TEH+10.0 TEH+4.1 TEH+5.1 TEH+6.7 TEH+3.5 TSH+1.0 TEH+3.8 TEH+3.3 TEH+4.0 TEH+2.5 TSH+0.8 TEH+3.7 to+5.0 TEH+4.1 TEH+2.2 TEH+5.0 TEH+2'TEH+1.9 TEH+2.2 TEH+4.6 Ta e 2-B Page 32 of 73 R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.4TWD Desc GINNA STATION Indication Location 7 20 10 20 16 20 24 20 27 21 11 22 0.2 ADS 0.7ADS 0.5 ADS 0.4 2.0 0.6 2.0 CRI MAI ADS 3.3 22 1 23 11 23 11 24 14 24 21 24 13 25 24 25 ll 26 13 26 1.0 1.0 0.8 11.9 0.8 0.5 2.3 1.0 0.8 12.4 1.2 0.6 1.6 ADS ADS ADS SAI ADS ADS ADI SRI ADS SAI SAI ADS 19 26 9.6 20 26 7.3 24 26 12.1 1 27 3.2 3.5 72 20 87 21 27 20 28 TEH+3.9 TEH+5.4 TEH+5.2 TEH+5.1 TEH+2.5 TEH+4.6 TEH+5.4 TEH+4.6 TEH+4.9 TEH+5.7 TSH+1.3 TEH+2.8 TEH+4.3 TEH+4.3 TEH+5.8 TEH+4.7 TSH+0.7 TEH+2.2 TEH+5.2 TEH+11.8 TSH+1.3 TSH+1.2 TSH+1.4 TEH+3.2 TEH+3.6 Table 2-B Page 33 of 73 R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.oTWD Desc GINNA STATION Indication Location 13 27 27 27 10 28 16 28 31 28 1 29 19 29 23 29 1 30 8 30 11 30 17 30 1.1 3.0 0.3 1.3 3.5 2.1 4.9 0.8 0.7 14.9 8.0 0.1 0.5 0.9 0.9 1.7 0.9 MAI ADS NQS ADI SRI SRI MAI 75 ADS 22 21 NQS ADS ADI 25 20 25 TEH+4.8 TEH+5.0 TEH+3.8 TEH+6.4 TEH+2.6 TEH+2.6 TEH+3.2 TEH+3.3 TEH+14.1 TSH+1.4 TSH+1.2 TEH+5.9 TEH+9.8 TEH+5.5 TSH+0.9 TSH+2.0 TSH+19.4 29 30 33 30 35 30 6 31 9 32 3 33 31 33 1 34 2.3 1~3 0.3 1.7 0.5 1.6 0.9 1.5 1.0 SRI SAI ADS ADS ADS ADS SRI ADS 86 TEH+2.5 TEH+3.4 TEH+4.5 TEH+5.9 to+2.9 TEH+8.5 TEH+7.3 TEH+7.5 TEH+2.7 TEH+5.2 Ta e 2-Page 34 of 73 r 4 R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.4TWD Desc GINNA STATION Indication Location 25 34 38 34 22 35 27 35 38 35 41 35 8 36 28 37 30 37 34 37 38 37 41 37 25 38 28 38 37 38 6 39 24 39 45 39 4 40 8 40 1.8 0.6 0.9 1.7 1.6 2.8 1.7 3.0 1.0 1.1 1.2 0.2 0.2 2.2 0.7 0.8 0.8 1.4 0.3 0.5 1.9 2.7 2.2 1.7 2.3 ADS SAI SAI SRI SRI SAI SRI MAI ADS NQI MAI ADI SRI SAI ADI NQS MAI ADS ADS ADS 20 81 83 22 23 25 TEH+6.2 TEH+6.9 TEH+13.4 TEH+2.7 TEH+2.6 TSH+0.9 TEH+3.2 TEH+3.6 TEH+2.7 TEH+3.4 to+7.5 TEH+7.6 TEH+5.0 TEH+16.6 TEH+3.1 TEH+4.0 TEH+2.7 TEH+3.4 TSC+0.6 TEH+4.7 TEH+2.8 TEH+3.0 to+3.9 TEH+6.6 TSC+0.6 TSH+41.8 TEH+7.6 TEH+9.3 Ta e 2-B Page 35 of 73 R.G.&E.Row Col Volts sg/B 93MAR h REPORTABLE INDICATIONS Ind.%TWD Desc GINNA STATION Indication Location 24 40 25 40 12 41 23 41 24 41 1~7 6.4 0.6 0.6 1.0 1.1 5.2 1.0 6.4 2.3 ADS ADS MAI ADS ADS 23 24 20 24 21 TEH+5.0 to+16.1 TSH+1.2 TEH+7.6 TSH+2.3 TEH+3.5 TEH+7.4 TSH+1.4 TEH+15.6 TSH+1.3 TSC+0.5 4 42 6 42 11 42 23 42 1.3 1.1 5.2 1.7 0.7 1.1 0.7 0.7 ADS ADS ADS SAI ADS SAI ADS 31 TEH+5.6 TEH+6.4 TSH+0.5 TEH+6.7 TEH+4.9 to TEH+5.3 TEH+16.6 to TEH+17.8+6.3+18.0 29 42 22 43 27 43 29 43 37 43 1 44 0.7 1.2 0.6 0.3 0.7 1.4 1.9 1.7 F 1 0.5 0.9 MAI ADS NQI SAI SAI SAI ADS ADS MAI ADI 21 TEH+8.2 to+17.2 TEH+8.9 TSH+0.8 TEH+6.1 TEH+5.6 TEH+7.2 to+8.1 TEH+9.2 to+11.8 TEH+12.2 TEH+4.9 TEH+5.6 TEH+11.6 a e2-Page 36 of 73 R.G.6 E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc GINNA STATION Indication Location 2 44 3 44 5 44 8 44 13 44 31 44 2 45 3 45 5 45 9 45 30 45 33 45 2 46 7 46 8 46 0.5 1.4 0.7 0.8 2.8 1.0 1.0 1.8 4.1 1.8 1.4 0.3 0.6 0.5 0.9 0.6 1'0.7 2.6 1.0 1.1 0.7 0.8 0.2 0.5 1.2 MAI ADS ADS MAI MAI ADS ADI ADI SAI MAI NQS ADS ADS SAI ADS MAI ADS MAI MAI ADS ADS ADI MAI ADI 28 24 20 35 TEH+3.0 to TEH+7.2 TSC+1.8 TSC+1.8 TEH+8.7 TEH+3.3 to TEH+3.3 to TEH+8.8 TEH+7.5 TEH+9.2 TEH+3.9 TEH+3.6 to TEH+4.1 TEH+11.2 TEH+4.5 TEH+6.4 TEH+7.1 TSH+0.5 TEH+3.0 to TEH+5.8 TEH+3.2 TEH+2.9 to TEH+7.9 TEH+11.2 TEH+10.4 TEH+5.5 to TEH+9.0 TSH+46.8+7.3+9.3+9.3+7.8+4.8+7.4+8.8 Table 2-B Page 37 of 73 R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc GINNA STATION Indication Location 1 47 4 47 5 47 6 47 20 47 34 47 4 48 6 48 30 48 36 48 7 49 10 49 12 49 14 50 25 50 32 50 1'1.4 1.8 1.4 1.0 0.3 1.1 0.7 4.5 0.4 0.8 1.2 1.1 1.5 0.4 0.9 1.1 1.6 0.2 1.2 0.4 2.0 0.4 1.1 0.5 1.4 0.6 1.6 SAI ADS SAI ADS SAI ADS BLG SAI ADS NQS MAI ADS ADS ADS SAI ADS MAI ADS MAI ADS MAI ADS ADS MAI ADS 47 21 34 TEH+3.2 TEH+5.9 TEH+9.0 TEH+10.0 TEH+5.1 TEH+5.1 TEH+6.0 TSH+0.8 TEH+10.9 TEH+3.2 TEH+4.1 TEH+6.8 TEH+7.4 to+5.9 TEH+8.6 TEH+6.8 TEH+5.1 TEH+2.8 TEH+5.4 TEH+4.4 TEH+5.8 TEH+4.7 to+5.8 TEH+5.6 TEH+3.8 TEH+5.2 TEH+5.9 TSH+3.3 TEH+4.4 TEH+5.6 Table 2-B Page 38 of 73

R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc GINNA STATION Indication Location 33 50 34 50 43-50 3 51 4 51 6 51 20 51 33 51 12 52 25 52 5 53 11 53 23 54 25 54 29 54 18 55 37 55 5t 27 56 0.6 0.6 1.8 0.9 2.0 1.3 0.5 1.6 0.9 1.0 0.6 0.6 1.0 1.3 0.5 1.0 0.2 0.5 0.4 1.9 0.8 1.6 0.5 0.6 1.0 MAI MAI ADI ADI ADS ADS SAI SAI ADS ADS MAI ADS , ADS SAI ADS NQS MAI ADI ADS ADS SAI SRI 24 90 38 TEH+3.8 TEH+3.6 to+4.6 TEH+5.3 TEH+7.9 TEH+4.5 TEH+9.4 TEH+3.2 TSH+0.3 TEH+3.6 TEH+5.4 TEH+6.9 TEH+3.2 TEH+4.2 TEH+7.8 TEH+6.9 to+8.5 TEH+7.4 TEH+16.6 TEH+18.4 to+19.5 TEH+7.9 TEH+6.4 TSH+1.9 TEH+11.2 TEH+5.3 TEH+5.7 TEH+2.6 Table 2-B Page 39 of 73 e

R.G.&'.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind..TWD Desc GINNA STATION Indication Location 5 57 37 57 2 58 3 58 6 58 7 58 16 58 27 58 5 59 11 59 16 59 19 59 23 59 3 60 21 60 34 60 36 60 5 61 18 61 0.6 0.5 0.2 2.0 1.3 1.0 0.7 1.4 0.2 0.7 1.3 1.7 0.6 1.0 0.5 1.2 0.4 0.8 1.3 0.8 1.2 3.4 1.7 0.7 ADS ADS SAI NQS ADS ADS ADI ADS ADS NQS SAI ADS ADS ADS ADS ADS NQS ADS ADS ADS ADS ADS MAI 28 25 TEH+4.1 TEH+5.4 TEH+5.1 TEH+5.3 TEH+7.6 TEH+7.1 TEH+7.8 TEH+5.0 TEH+9.8 TEH+5.2 TEH+8.4 TEH+8.1 TEH+6.7 TEH+6.6 TEH+9.1 TSH+2.6 TEH+12.7 TEH+9.1 TEH+6.1 TSH+0.6 TEH+4.0 TEH+3.8 TEH+6.2 TEH+12.1 TEH+12.5 Table 2-B Page 40 of 73 R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc GINNA STATION Indication Location 19 61 5 62 12 62 10 63 22 63 23 63 2 64 14 64 21 64 5 65 11 65 15 65 25 65 30 65 15 66 16 66 19 66 1.3 0.9 2.6 2.5 1.0 10.7 1.2 10.3 0.3 0.6 1.7 0.4 1.0 1.6 2.2 0.3 0.6 0.9 1.5 1.6 1.2 1~1 0.6 2.1 1.4 ADS MAI ADS ADI SAI MAI MAI.ADS SAI ADS ADS ADS NQS MAI ADS ADS ADS CRI NQS ADS ADS 22 26 22 20 TEH+4.6 TEH+5.2 to TEH+4.8 TEH+10.6 TEH+6.3 TEH+2.4 TSH+1.0 TSH+2.0+5.7 TEH+6.2 TEH+3.3 to+6.0 TEH+8.3 TEH+9.7 TEH+7.6 TEH+7.6 TEH+6.0 TSH+1.7 TSH+1.6 TSH+2.1 TEH+4.7 TEH+9.1 to+9.9 TEH+9.7 TEH+5.2 TEH+7.0 TEH+5.7 TEH+3.4 to+7.4 Table 2-B Page 41 of 73 i

R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc GINNA STATION Indication Location 30 66 1 67 3 67 23 67 37 67 21 68 23 68 27 68 7 69 21 69 27 69 34 69 4 70 19 70 11 71 24 71 28 71 0.9 1.5 2.3 1.3 1.6 0.7 0.3 0;7 1.6 0.4 0.6 1.2 0.2 0.4 0.4 0.3 1.0 4.2 2.4 0.8 2.3 2.1 0.3 0.8 0.4 0.4 0.4 0.5 SAI ADS ADI ADS ADS ADS NQS SAI ADS SRI MAI ADS NQS SAI SAI ADI ADS MAI ADS NQS MAI NQS SAI.NQS 77 86 21 83 TEH+9.6 TEH+12.4 TEH+4.1 TEH+7.6 TEH+12.6 TEH+6.2 TEH+4.1 TEH+4.3 TEH+12.4 TEH+3.2 TEH+5.4 TEH+6.3 TEH+5.0 TEH+14.6 TEH+3.8 TEH+4.6 TEH+2.7 TEH+3.4 TEH+6.6 TEH+3.2 TEH+4.2 TSH+0.6 TEH+3.3 TEH+3.6 TEH+4.6 TEH+4.6 TEH+4.4 TEH+5.2 Table 2-B Page 42 of 73 R.G.&E.Row Col Volts sg/B 93MAR REPORTABLE INDICATIONS Ind.%TWD Desc GINNA STATION Indication Location 7'2 12 72 14 72 20 72 1 73 18 73 21 73 6 74 8 74 1 76 4 76 7 76 20 76 24 76 12 77 5 78 10 78 16 78 5 79 13.79 21 79 1.4 1.0 1.4 1.6 0.4 0.3 0.9 1.9 2.9 2.8 2.7 1.0 0.3 2.0 0.3 0.2 0.2 1~1 1.0 1.2 1.0 1.8 2.8 0.3 ADS ADI ADI NQI ADI ADI ADI ADS ADS SAI ADS SAI SAI SAI ADS ADS ADS ADS ADS ADS ADS SAI 21 92 21 TEH+3.3 TSC+1.6 TEH+4.5 TEH+12.2 TEH+3.9 TEH+4.8 TEH+18.4 TEH+4.4 TEH+5.7 TEH+3.2 TEH+9.5 TSH+0.3 TEH+2.9 TEH+5.8 TEH+3.7 TEH+2.8 TEH+4.0 TEH+4.5 TEH+4.6 TEH+3.0 TEH+7.6 TEH+4.4 TEH+5.6 TEH+9.7 TEH,+3.2 Table 2-B Page 43 of 73 R.G.&E.Row Col Volts sg/B 9'3MAR REPORTABLE INDICATIONS Ind.4TWD Desc GINNA STATION Indication Location 10 80 8 81 13 81 12 87 7 88 12 88 13 88 14 88 15 88 16 88 17 88 19 88 14 89 4 90 1 92 0.8 1.1 0.5 0.3 0.3 13.5 0.9 0.8 2.4 1.5 3.2 3.9 13.4 1.0 3.7 9.7 7.0 8.0 1.0 1'2.2 MAI ADS SAI NQS SAI MBI SAI MAI MBS MBS MBS MBS MBS MBS BLG MBS ADS 75 94 29 38 TEH+4.8 TEH+7.7 TEH+3.5 TEH+5.2 TEH+2.8 TEH+0.3 TEH+3.0 TEH+3.0 TEH+3.4 TEH+3.8 TEH+0.4 TEH+0.3 TEH+0.8 TEH+0.7 TEH+0.3 TEH+0.2 TSH+2.9 TEH+0.7 TEH+4.8 TSH+11.1 TSC+11.4 Number of Tubes: 255 Number of Indications:

362 Table 2-B Page 44 of 73

4.4 QBSRRVATIONII

The results of the examination indicate that IGA and IGSCC'continue to be active within the tubesheet crevice region on the inlet side of each steam generator.

As in the past, IGA/SCC is much more prevalent in the"B" steam generator with 103 new crevice indications reported.In the"A" steam generator, 41 new crevice indications were reported.The majority of the inlet tubesheet crevice corrosion indications are IGA/SCC of the Mill Annealed Inconel 600 tube material.This form of corrosion is believed to be the result.of an alkaline environment forming in the tubesheet crevices.This environment has developed over the years as deposits and active species such as sodium and phosphate, have reacted, changing a neutral or inhibited crevice into the aggressive environment that presently exists.Table 3 shows the steam generator IGA/SCC history.Page 45 of 73 Ginna Steam Generators Crevice Corrosion Indication History Mar 1979 Dec 1979 Apr 1980 Nov 1980 Apr 1981 Feb 1982 Oct 1982 Apr 1983 Mar 1984 Mar 1985 Feb 1986 Feb 1987 Feb 1988 Mar 1988 Mar 1989 Apr 1990 Apr 1991 Apr 1992 Mar 1993 Not Sizeable A 8 0':,:,,:,0,::

0"0 0 19 0 2 0 0 0 1 0 27 3 11 0 5 0 23 2 3 17 82 3 22 0 1 14 150 16 108 14 42 33 104 114 110 1-25%A 8 26-50%A 8 51-75%A 8 0 1 0 2 0 7 0 0 0 0 0 1 0 5 0 4 0 5 0 0 0 1 0 6 0 4 0 5 1 3 0 0 0 15 1 0 1 7 0 7 0 1 0 4 0 6 1 9 2 9 0 1 0 0 1 14 0 1 1 8 3 16 0 1 2 7 0 1 0 0 0 0 0 0 0 4 2 35 2 1 0 1 3 8 6 8 0 6 2 12 0 0 0 0 0 2 0 0 0 1 3 3 0 0:: 0'.0.0,2: 0-0 0 6 0 5 76-100%A 8 0 0-0 0 0 2 0 0 0 0 0 5 0 16 0 15 0 2 1 27 0 25 13 46 2 11 0 4 8 79 11 32 14 18 1 12 4 9 TOTAL A 8 0 2 0 11~0 31 0 3 0 14 0 13 1 59 4 51 1 8 2 69 5 52 34 153 7 41 0 6 24 268 38 157 30 79 34 118 121 123 TOTALS: 216 710 5 29 5 68 21 148 54 303 301 1,258 TABLE 3 Page 46 of 73 0

Along with IGA/SCC in the crevices, there appears to have been a slight decrease in PWSCC at the roll transition during the last operating cycle.This mechanism was first addressed in 19S9 and this year there were 20 Roll Transition (PWSCC)indications in"B" steam generator and 80 Roll Transition (PWSCC)indications in"A" steam generator.

These numbers include tubes that may have PWSCC in combination with IGA or SCC in the crevice.A large volume, typically (20%TW, wastage type condition exists just above the tubesheet secondary face of both generators.

A small percentage of the tubes, generally toward the center of the bundle, have this condition.

A number of these tubes did have penetrations

)20%TW but have not showed an increase in the growth rate for several cycles.No tubes were listed for corrective action from this condition.

It is believed that these wastage indications were caused by the original water chemistry when phosphate was used as a buffering medium.Small indications of probable copper'deposits were also found in the tubesheet crevice region randomly located throughout each steam generator.

Page 47 of 73 Minor denting has been detected at the tubesheet secondary face for many years in both steam generators, primarily on the inlet side.Denting was also detected at the 1st, 2nd and 6th tube support plates randomly throughout the generator, and in most cases was of greater magnitude in size than that at the tubesheet secondary side face.In general, minor distortions of most of the tube support signals were seen.The denting phenomenon and minor distortions at.the tubesheet and support plates can be attributed to secondary side corrosion product buildup in the annular region between the tube outside surface and the carbon steel support member.Comparisons with previous data indicates that a small increase in the extent or magnitude of denting has occurred from what has been detected by previous inspections.

MRPC at the¹1 tube support plate intersections in the Hot Leg of both steam generators showed no indications within the support plates.This sample included tubes with and without.denting at the support intersection.

MRPC at¹6 tube support plate intersections with dents in the Cold Leg of both steam generators showed no indications in or near the support plates.Page 4S of 73 The eight (8)tubes in the"A" Steam Generator recorded with indications at the anti-vibration bar intersections were examined again to monitor growth rates.These indications are less than the repair limit.Many of them were recorded in earlier outages and have not changed significantly since previous examinations.

In light of the fact that only a small number of tubes exhibit these indications and no measurable growth has been noted, AVB fretting wear is not considered to be an active damage mechanism or major concern at this time but will be periodically monitored for any growth.In summary, the"A" Steam Generator had 121 tubes that were found to have"new" tubesheet cr'evice indications (41 IGA/SCC and 80 roll transitions).

The"B" Steam Generator had 123"new" tubesheet crevice indications (103 IGA/SCC and 20 roll transitions).

Page 49 of 73

5.0 CORRECTIVE

ACTION Table 4 has been generated to identify tubes with crevice indications or with indications which exceed the repair criteria.This table also shows the axial location of the indication and what corrective action was taken on these tubes.Tubes requiring repair due to hot leg tubesheet crevice indications were identified by the appropriate codes: a)an absolute drift signal (ADS)of the Mix-2 Channel b)quantifiable IGSCC indications on the 400 kHz data c)roll transition or crevice indications as identified from the MRPC examination There were no tubes deplugged in the"A" generator and 48 tubes deplugged in the"B" generator in an effort to return them to service by sleeving.These tubes were recorded with repairable indications in earlier outages.A full length examination was performed after deplugging to insure no indications existed that would prevent them from being returned to service.Page 50 of 73 The breakdown of corrective action (repairs)performed are as follows: The A steam generator had a total of 121 tubes with indications identified by eddy current.One tube was obstructed by a foreign object and was subsequently plugged, for a total of 122 repairs.The 8 steam generator had a total of 123 tubes with indications identified by eddy current.Of the 4S deplugged tubes, 46 tubes were returned to service by sleeving (2 deplugged tubes were re-plugged).

A total of 171 repairs were made in 8 steam generator.

A Ginna Steam Generator Tube Inspection and Corrective Action history has been tabulated on page 68 as Table 5.Page 51 of 73 0

ROW~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~ll8..~~~~~~~~~8~~~~~~~~~~~~~~~~~\~~~~~~~~~~~~~~0\~~~8 8~~8~~~0~0~~~~~~~~~~~~~~COL C: 8:~~~~~~~~~~8 8~~~8 8~~~~~~~~~~~~~~\~~~~~~~~~~~~~~~~~~~~~~~~~~8~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~~~~C~C~C C~~~~~~~~~~~~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~~~8 a~~~~~~~~~~~~~~~~~~~~~~~~~~8~~~C~~B..BC~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~~8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8~~C~~~~~~8~~C'~~~~~~~~~8~~~~~~~~~8~~~~C~~~8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8~~~~~~~~~~~~~~~~~~'8~~~~\~~~~~~~~~~~~~~~~~~~~~~~~~8~~~8~~~~~~~~~~~~~~'C CB.~~~~~~~~~~~~~~~\\~0~~~~~~~~~~~~~~~~~~~~~~~~~~~0~~~~~C~~~CC~~~~~~~~~~~~~~~~~~8~~~8~~~~~~~~~~~8~~~~~~~~~~~~~~~~~~~~~~~~~~0~~~~~~~~8~~~~~~~~~~~~~~C~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~C~~C~~~~~~~~~8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8 8~~~~~BB~~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8~~8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~BB~ll~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ll.~8~~~'~~~~~~~~~~~~~~~~0~~8~~~~~~8~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~28 38 1993: CE Plugs CE Sleeves BLW Sleeves BLW Exp.Slv.Plug 18 8: Installed in 51: 62: 1:~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~~~8 g 8~8~~~~~~~~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~~~~~~ll~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~~~~8~~~~~~~~~~~~~I 0~~~~~~~~~~~~~~8~~~~~\~~~~~~~~~~~~~~~~~8'8~~~~~~~~~~~~~~~CC~~~~~~~~~~~~C~~~~~~~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8~~~~~~~~~~~~~8~~~~~~8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~0~~'CC 8~~~~~~~~~~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~0~~~~~~~~\~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8~~~~~~~~~~~~C~~~~~~~~~~~~C~~~~~~~~~8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~~~~~~~~C 8~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~C~~~~~~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Rochester Gas 5 Electric Corp.Ginna Nuclear PoMer Station SiG-A Hot Leg 84i15/93 Inlet ACRI ISIS Tubes R.G.&E.SG/A 93MAR REPAIRABLE INDICATIONS Ginna StationRow Col Volts Ind.%TWD Desc Indication Location Repair 4 3 6 3 7 4 2 5 1.7 0.7 1.2 2.1 1.5 6 8 2 9 6 9 12 10 5 ll 3 12 26 14 2 16 10 16 2.3 2.7 2.5 0.8 2.9 1.8 5.3 0.7 0.8 0.9 0.3 5 10.9 3.7 SRI SRI MRI SRI SRI SBI SBI MRI SRI SRI MRI MRI SRI MRI SAI 93 MAI 93 TEH+2.1 TEH+1.9 TEH+2.2 TEH+2.3 TEH+2.5 TEH+0.1 TEH+0.4 TEH+1.7 TEH+1.7 TEH+1.7 TEH+2.5 TEH+2.4 TEH+2.4 TEH+2.2 TEH+3.3 TEH+2.8 TEH+3.2 TEH+8.8 BW Sleeve BW Sleeve BW Sleeve BW Sleeve CE Plug BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve CE Sleeve 19 16 9 17 12 17 21 17 25 17 10 18 29 18 4.4 2.3 0.7 0.5 0.8 0.4 1.6 3.6 SRI SRI SAI SAI SAI 80 MA I SRI TEH+3.0 TEH+2.3 TEH+3.3 BW Sleeve CE Sleeve CE Sleeve TEH+3.9 TEH+7.2 TEH+8.7 TEH+2.1 BW Sleeve CE Sleeve BW Sleeve TEH+2.6 to+3.5 BW Sleeve Table 4-A Page 53 of 73 0

R.G.&E.SG/A 93MAR REPAIRABLE INDICATIONS Ginna Station Row Col Volts Ind.%TWD Desc Indication Location Repair 14 19 1.7 16 19 0.9 24 19 3.0 12 20 0.5 15 20 0.8 1 21 25.5 10.6 3.8 SAI SAI SRI NQI SAI SBI SBI SRI TEH+5.0 TEH+3.3 TEH+2.3 TEH+3.2 TEH+2.8 TEH+0.3 TEH+0.3 TEH+2.7 CE Sleeve CE Sleeve BW Sleeve BW Sleeve CE Sleeve CE Plug 14 21 17 21 22 21 24 21 17 22 18 22 39 24 39 25 9 26 25 27 6 28 13 28 26 28 4.1 3.3 2.6 1.8 0.8 0.6 0.8 0.9 1.6 1.4 1.7 2.2 2.5 5.7 2.8 0.5 0.4 0.4 0.8 0.4 ADI ADI CRI CRI CRI MAI SAI SAI CRI SAI SAI ADI SRI MRI SRI MAI SAI SAI SRI SAI TEH+4.6 TEH+10.7 TEH+1.8 TEH+2.3 TEH+2.3 TEH+5.0 TEH+8.6 TEH+4.1 TEH+2.2 TEH+2.7 TEH+3.8 TEH+6.4 TEH+2.9 TEH+2.8 TEH+2.7 TEH+3.9 TEH+4.1 TEH+4.6 TEH+2.6 TEH+3.9 BW Sleeve CE Sleeve CE Sleeve BW Sleeve BW Sleeve CE Sleeve CE Plug BW Sleeve CE'Sleeve CE Sleeve CE Sleeve CE Sleeve CE Sleeve Table 4-A Page 54 of 73 R.G.&E.SG/A 93MAR REPAIRABLE INDICATIONS Ginna Station Row Col Volts Ind.4TWD Desc Indication Location Repair 34 28 28 30 24 31 25 31 27 31 39 31 14 32 24 32 8 33 14 33 19 33 7 34 16 34 35 35 36 35 21 36 17 37 24 37 34 37 34 39 6 40 15 40 0.3 0.5 0.5 0.8 0.4 3.0 0.5 0.4 1.0 5.4 3.0 2.5 0.5 0.7 3.2 0.4 4.3 2.9 2.1 1.6 0.8 1.6 1.0 SRI MRI MAI SAI SAI MRI ADI SRI SRI MAI ADI ADI ADI SRI SRI SAI SRI MRI SRI SAI SRI CRI 56 78 79 TEH+2.5 TEH+2.6 TEH+3.3 TEH+3.0 TEH+3.0 TEH+2.8 TEH+17.3 TEH+2.6 TEH+2.5 TEH+2.5 TEH+3.9 to+5.3 TEH+3.5 TEH+15.7 TEH+2.5 TEH+5.2 TEH+2.7 TEH+3.8 TEH+2.7 TEH+7.6 TEH+9.1 TEH+2.5 TEH+2.3 TEH+5.5 TEH+2.3 TEH+2.2 BW Sleeve CE Sleeve BW Sleeve BW Sleeve CE Sleeve BW Sleeve CE Sleeve CE Sleeve CE Sleeve CE Sleeve BW Sleeve CE Sleeve CE Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve CE Sleeve CE Sleeve Table 4-A Page 55 of 73 e 0 R.G.&E.SG/A 93MAR REPAIRABLE INDICATIONS Ginna Station Row Col Volts Ind.4TWD Desc Indication Location Repair 2 41 ll 41 2 42 23 42 31 42 32 42 1 43 4 43 16 43 24 43 28 44 31 44 32 44 30 45 17 46 33 48 17 50 23 50 25 50 0.9 0.9 2.3 1.3 1.3 0.8 0.6 1.0 0.9 4.5 1.3 1.3 0.4 0.7 4.4 0.7 6.7 2.1 0.7 2.7 1.7 0.7 0.9 SRI SRI SRI CRI CRI SRI SAI SRI CRI CRI SRI SRI CRI SAI MRI CRI SAI MAI CRI SAI NQI 71 64 TEH+2.3 TEH+2.4 TEH+2.3 TEH+2'TEH+2'TEH+2-7 TEH+4.6 TEH+2.3 TEH+5.0 TEH+2.7 TEH+2.3 TEH+2.3 TEH+2.3 TEH+2.3 TEH+2.3 TEH+2.9 TEH+2.7 TEH+2.3 TEH+4.4 BW Sleeve CE Sleeve BW Sleeve BW Sleeve CE Sleeve CE Sleeve CE Plug CE Sleeve BW Sleeve CE Sleeve BW Sleeve CE Sleeve CE Sleeve CE Sleeve BW Sleeve CE Sleeve TEH+2.3 TEH+3.0 TEH+3.0 BW Sleeve BW Sleeve TEH+17.7 to+19.3 CE Plug 32 50 1.4 0.9 0.7 SAI SAI SAI TEH+5.0 TEH+12.6 TEH+13.4 CE Sleeve Table 4-A Page 56 of 73 R.G.&E.SG/A 93MAR REPAIRABLE INDICATIONS Ginna Station Row Col Volts Ind.4TWD Desc Indication Location Repair 25 51 18 52 2 53 13 53 23 53 28 53 26 54'26 56 26 58 38 58 18 62 31 63 1 64 16 64 24 67 26 67 35 67 38 67 3 68 27 68 2 69 3 69 3.9 2.5 0.8 1.4 1.3 0.5 0.6 3.8 l.2.6.9 3.0 2.1 3.5 1.9 0.5 0.7 1.0 0.5 1.0 1.4 1.3 0.9 0.6 0.9 ADI ADI CRI CRI CRI SAI CRI SAI PTF CRI SRI MRI MRI SRI SRI SRI SRI SRI SRI SRI SRI SRI SRI 97 TEH+4.3 TEH+19.2 TEH+2.2 TEH+2.2 TEH+2.3 TEH+4.1 TEH+4.5 TEH+2.3 TEH+16.0 TEH+19.6 TEH+2.2 TEH+2.4 BW Sleeve CE Plug BW Sleeve BW Sleeve CE Sleeve CE Sleeve BW Sleeve BW Exp.Plug BW Sleeve BW Sleeve TEH+2.4 TEH+3.0 TEH+2.5 TEH+2.3 TEH+2.2 TEH+2.3 TEH+2.3 TEH+2.6 TEH+2.1 TEH+2.3 TEH+3.2 BW Sleeve CE Plug BW Sleeve CE Sleeve CE Sleeve BW Sleeve BW Sleeve CE Sleeve CE Sleeve BW Sleeve CE Sleeve TEH+6.2 to+15.3 BW Sleeve Table 4-A Page 57 of 73 R.G.&E.SG/A 93MAR REPAIRABLE INDICATIONS Ginna Station Row Col Volts Ind.4TWD Desc Indication Location Repair 16 69 27 69 31 69 38 69 21 70 17 72 13 73 7 75 5 78 8 78 12 78 9 80 11 80 20 80 14 82 7 83 12 84 1'1.4 0.5 0.8 0.2 1.9 3.8 0.4 1.2 3.5 0.7 0.6 1.0 0.7 0.7 3.4 1.4 5.6 5.4 SRI SRI SRI SRI ADI CRI NQI SRI-SRI SRI SRI SAI SRI SAI'AI ADI SRI SRI MRI 56 TEH+2.5 TEH+2.2 TEH+2.3 TEH+2.3 TEH+3.5 TEH+4.6 TEH+2.5 TEH+3.9 TEH+2.8 TEH+2.5 TEH+2.6 TEH+2.4 TEH'2.8 TEH+2.3 TEH+2.7 TEH+2.8 TEH+4.0 TEH+2.4 TEH+2.4 TEH+1.8 BW Sleeve CE Sleeve BW Sleeve BW Sleeve CE Sleeve CE Sleeve CE Sleeve CE Sleeve CE Sleeve CE Sleeve CE Sleeve CE Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve Number of Tubes: 121 Number of Indications:

149 Table 4-A Page 58 of 73 ROW~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~B~~DD BD.B p~~QD B~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~o~~~~~~~~~~~~~o~~~~~~~~~~~~~~~~~~~~~~~~o~~~~ll o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Q~~B~~~B~~~~~~Q~~~~~~~~~~~~~~~~~~~~~~~~~~~~D*B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~BB.B~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~.D~~~~~~~~~o~~~~~~~~\~~~~~~~~~~~~~~~~B~~~B~~~~~~~~~~~Dp~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\~~~~~~~~~~~~~~~~~~~~B~B~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~BB~~~~~~~~~B~B B~~~~o o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ll~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~COL 18 28 38 15: installed in 1993o CE Plugs C: 8: CE Sleeves B: 187: B&W Sleeves 1: CE Welded Slv.plug D: 48: peplugged Tubes (2 plugs, 46 sleeves)~~~~~~~~~~~~~~~~~~~~~~Q~~~~~~~~~~\~~~~~~~~~~~~~~~~00 0~~Q~Q~~~~~~~p~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Q~~~~~~~~~~~~~~~p~~~~~~~~~B~~~~~B~~~~~~~~~~~~B B.~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~B~B~~ll B~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~B B~~~~~~~~~~~~~~o o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B B~~~~~~~~B~~~~B~~~~~~~~~~~~B~~~~~~~~~~~~~~~~B~~~B~~~~~B B B~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~\~~~~~~~~~~~~~B~~.BB~~~~~BE~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~'BB~~~g~~~~~~~~~~FIGURE 3 o~~~~~~~~Q~~~~~~~~~~~~~~~~~~~p p~~~~~~~~~~~P~~~B~~~~~Q~~~~~~~Q~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B B~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~B~~~~~~~B B~~~~~~~~B~~~B~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~o g o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~Q~~~~~~Q P~~~Q~~~~~~~~~~~~~~~~~~~~~~~B~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ll~~~~B p~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~~~~~Q~~~~p~~~~~~~~~~B~~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~B~~~B~~~~~~~~B~~~~~~~~~~~~~~~~~~B~~~~~~~~~~~~B~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~g~~~~~~~~~~~~~~~~Rochester Gas 5 Electric Corp.Ginna Nuclear Pouer Station S~G-B 84/88~93 Inlet ACRZ ISIS Tubes R.G.6 E.sg/B 93MAR REPAIRABLE INDICATIONS GINNA STATION Row Col Volts Ind.%TWD Desc Indication Location Repair 9 2 12 5 3 8 4 10 29 12 2 13 6 13 21 15 29 15 21 16 24 16 15 17 32 17 16 18 26 18 22 19 25 19 26 19 24 20 27 21 30 21 11 22 1.0 2.0 2.7 1.3 0.6 1.2 1.3 0.3 1.9 0.5 0.5 0.7 0.9 2.0 2.0 1.0 0.4 2.0 0.6 SRI MBI ADI SAI SAI SAI SRI MAI ADI SAI DPT DPT DPT DPT SAI SRI MAI SRI SRI MRI MRI CRI DPT MAI 72 TEH+2.7 TEH+0.6 TEH+4.8 TEH+4.5 TEH+4.1 TEH+5.1 TEH+3.1 TEH+3.5 to+5.3 TEH+4.9 TEH+8.0 TEH+3.3 TEH+2.5 CE Plug CE Plug BW Sleeve BW Sleeve CE Plug BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve CE Plug TEH+2.2 TEH+2.3 TEH+1.9 TEH+2.2 TEH+5.1 TEH+2.5 TEH+4.6 BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve TEH+3.7 to+5.0 BW Sleeve Table 4-B Page 60 of 73

R.G.&E.sg/B 93MAR REPAIRABLE INDICATIONS GINNA STATION Row Col Volts Ind.%TWD Desc Indication Location Repair 30 22 11 24 14 24 24 25 31 25 38 25 ll 26 13 26 1 27 13 27 10 28 16 28 31 28 1 29 11 30 29 30'I 33 30 31 33 25 34 38.34 22 35 0.8 0.5 0.8 1.2 1.6 3.2 1.3 3.5 2.1 4.9 0.8 0.9 2.3 1.3 0.3 1.5 0.6 0.9 1.7 1.6 DPT SAI ADI DPT DPT SRI SAI SAI MAI ADI SRI SRI MAI ADI=SRI SAI SRI SAI SAI SRI SRI 87 75 86 TEH+2.8 TEH+4.3 TEH+4.7 TEH+2.2 TEH+11.8 TEH+3.2 TEH+4.8 TEH+6.4 TEH+2.6 TEH+2.6 TEH+3.2 TEH+3.3 TEH+5.5 TEH+2.5 TEH+3.4 TEH+4.5 TEH+2.7 TEH+6.9 TEH+13.4 TEH+2.7 TEH+2.6 BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve CE Plug BW Sleeve BW Sleeve BW Sleeve BW Sleeve CE Plug BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve Table 4-B Page 61 of 73 R.G.&E.sg/B 9'3MAR REPAIRABLE INDICATIONS GINNA STATION Row Col Volts Ind.%TWD Desc Indication Location Repair 38 35 41 35 8 36 28 36 40 36 28 37 30 37 34 37 1.7 3.0 1.0 0.2 3.2 0.2 2.2 0.7 81 SAI SRI MAI DPT DPT 83 PTF NQI MAI ADI TEH+3.2 TEH+3.6 TEH+2.7 BW Sleeve BW Sleeve TEH+5.0 TEH+17.6 TEH+16.6 TEH+3.1 TEH+4.0 CE Plug BW Sleeve BW Sleeve TEH+3.4 to+7.5 BW Sleeve BW Sleeve BW Sleeve 35 37 36 37 38 37 41 37 28 38 0.8 0.8 0.3 DPT DPT SRI SAI ADI TEH+2.7 TEH+3.4 TEH+4.7 BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve 35 38 37 38 38 38 39 39 40 39 39 40 40 40 12 41 23 42 1.9 1.0 0.7 0.7 DPT MAI DPT DPT DPT DPT DPT MAI SAI SAI TEH+3.5 TEH+4.9 to+6.3 TEH+16.6 to+18.0 BW Sleeve CE Plug.BW Sleeve TEH+3.0 to+3.9 BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve Table 4-B Page 62 of 73 R.G.&E.sg/B 93MAR REPAIRABLE INDICATIONS GINNA STATION Row Col Volts Ind.%TWD Desc Indication Location Repair 29 42 27 43 29 43 37 43 39 43 1 44 2 44 8 44 13 44 31 44 2 45 9 45 30 45 33 45 39 45 2 46 7 46 8 46 0.7 0.3 0.7 1.4 1.9 0.5 0.9 0.5 1.0 1.0 4.1 1.8 1.4 0.9 0.7 1.0 0.2 0.5 MAI NQI SAI SAI SAI MAI DPT ADI MAI MAI MAI ADI ADI SAI MAI SAI MAI MAI DPT MAI ADI MAI ADI TEH+5.6 TEH+11.6 BW Sleeve BW Sleeve CE Plug TEH+3.0 to+7.3 BW Sleeve TEH+3.3 to TEH+3.3 to TEH+7.5 TEH+9.2 TEH+3.9+9.3+9.3 BW Sleeve BW Sleeve BW Sleeve TEH+3.6 to+7.8 BW Sleeve TEH+6.4 BW Sleeve TEH+3.0 to+4.8 BW Sleeve TEH+3.2 BW Sleeve BW Sleeve TEH+2.9 to+7.4 BW Sleeve TEH+10'TEH+5.5 to TEH+9.0 BW Sleeve+8.8 BW Sleeve TEH+8.2 to+17.2 CE Plug TEH+6.1 BW Sleeve TEH+5.6 BW Sleeve TEH+7.2 to+8.1 TEH+9.2 to+11.8 38 46 41 46 1 47 1.2 DPT DPT SAI TEH+3.2 BW Sleeve BW Sleeve CE Plug Table 4-B Page 63 of 73 R.G.&'.sg/B 93MAR REPAIRABLE INDICATIONS GINNA STATION Row Col Volts Ind.:TWD Desc Indication Location Repair 4 47 5 47 34 47 41 47 4 48 7 49 10 49 12 49 41 49 14 50 32 50 33 50 34 50 1.8 1.0 0.3 0.4 0.2 0.4 0.4 0.6 0.6 0.6 1.8 0.9 SAI SAI SAI DPT MAI SAI MAI MAI DPT MAI MAI MAI MAI ADI ADI 47 TEH+9.0 TEH+5.1 TEH+5.1 TEH+3.2 BW Sleeve BW Sleeve BW, Sleeve BW Sleeve TEH+7.4 to+5.9 BW Sleeve TEH+2.8 TEH+4.4 BW Sleeve BW Sleeve TEH+3.8 TEH+4.4 TEH+3.8 TEH+3.6 to+4.6 TEH+5.3 TEH+7.9 BW Sleeve BW Sleeve BW Sleeve BW Sleeve TEH+4.7 to+5.8 BW Sleeve BW Sleeve 37 50 0.9 2.0 DPT 70 70 TSH-15.4 TSH-13.9 BW Sleeve 4 51 20 51 25 52 11 53 23 54 25 54 29 54 0.5 0.9 0.6 0.5 0.5 0.4 1.9 SAI SAI MAI SAI MAI ADI 90 TEH+3.2 TEH+3.6 TEH+3.2 BW Sleeve BW Sleeve BW Sleeve TEH+18.4 to+19.5 TEH+7.9 TEH+6.4 CE Plug BW Sleeve BW Sleeve TEH+6.9 to+8.5 BW Sleeve Table 4-B Page 64 of 73 R.G.&E.sg/B 93MAR REPAIRABLE INDICATIONS GINNA STATION Row Col Volts Ind.4TWD Desc Indication Location Repair 13 56 27 56, 35 56 36 57 42 57 2 58 7 58 27 58 38 58 38 59 38 60 40 60 18 61 19 61 12 62 38 62 10 63 34 63 2 64 14 64 36 64 11 65 30 65 0.6 1.0 0.5 1.0 0.7 0.7 0.9 2.5 1.0 0.3 0.6 0.4 0.6 1-2 SAI SRI DPT DPT DPT SAI ADI SAI DPT DPT DPT DPT MAI MAI ADI DPT SAI DPT MAI MAI DPT MAI CRI TEH+5.7 TEH+2.6 TEH+5.1 TEH+7.8 TEH+8.4 TEH+12.5 TEH+9.7 TEH+7.6 TEH+6.0 TEH+4.7 TEH+9.1 to+9.9 TEH+5.2 BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve TEH+2.4 BW Sleeve BW Sleeve TEH+5.2 to+5.7 BW Sleeve Table 4-B Page 65 of 73 R.G.&E.sg/B 93MAR REPAIRABLE INDICATIONS GINNA STATION Row Col Volts Ind.:TWD Desc Indication Location Repair 36 65 30 66 1 67 33 67 23 68 27 68 7 69 21 69 27 69, 32 69 34 69 19 70 24 71 28 71 30 71 14 72 20 72 26 72 1 73 18 73 21 73 6 74 0.9 2.3 0.7 0.4 0.6 0.4 0.4 0.3 1.0 4.2 0.8 0.8 0.4 0.4 1.4 1.6 0.4 0.3 0.9 1.9 DPT SAI ADI DPT SAI SRI MAI SAI DPT SAI ADI MAI MAI SAI DPT.ADI ADI DPT NQI ADI ADI 77 86 83 92 TEH+9.6 TEH+4.1 TEH+4.3 TEH+3.2 TEH+5.4 TEH+14.6 TEH+3.8 TEH+4.6 TEH+2.7 TEH+3.4 TEH+3.2 TEH+3.6 TEH+4.6 TEH+4.4 TEH+4.5 TEH+12.2 TEH+3.9 TEH+4.8 TEH+18.4 TEH+4.4 BW Sleeve BW Sleeve CE Plug BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve CE Plug BW Sleeve CE Plug BW Sleeve Table 4-B Page 66 of 73 R.G.6 E.sg/B 93MAR REPAIRABLE INDICATIONS GINNA STATION Row Col Volts Ind.4TWD Desc Indication Location Repair 8 74 27 75 7 76 20 76 24 76 12 77 27 77 28 77 21 79 10 80 22 80 8 81 13 81 22 81 14 85 13 86 12 87 7 88 8 90 2.9 0.3 0.3 0.2 0.2 0.3 0.8 0.5 0.3 13.5 0.9 0.8 2.4 1.5 1.0 ADI DPT SAI SAI SAI SAI DPT DPT SAI MAI DPT SAI SAI DPT DPT DPT MBI SAI 75 MAI 94 DPT NQI TEH+5.7 TEH+2.9 TEH+3.7 TEH+2.8 TEH+4.0 TEH+3.2 TEH+4.8 TEH+3.5 TEH+2.8 TEH+0.3 TEH+3.0 TEH+3.0 TEH+3.4 TEH+3.8 TSH-7.3 BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve BW Sleeve CE Plug BW Sleeve BW Sleeve CE Plug BW Sleeve CE Plug Number of Tubes: 171 Number of Indications:

199 Table 4-B Page 67 of 73 GINNA STATION STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY DATE NO.TUBES INSPECTED A B HOT COLD HOT COLD TOTALTUBES REQUIRING CORRECTIVE TYPE OF ACTION DEGRADATION A B)4(Pj6 REQUIRED NO.TUBES REPAIRS PLUGGED A B A B NO.PLUGGED NO.TUBES RETURNED NO.SLEEVES NO.PULLED TOTAL(NEl)

TOTAL(NET)

SLEEVED TO SERVICE PLUGGED TUBES PLUGGED SLEEVED COMMENTS A B A B A B A B A B A B IN FACTORY APR 1972 MAR 1974., NOV 1974 MAR 1975 JAN 1976 FEB 1976 APR 1976 APR 1977 JUL 1977 JAN 1978 APR 1978 FEB 1979 DEC 1979 APR 1980 NOV 1980 MAY 1981 FEB 1982 8EP 1982 APR 1983 MAR 1984 MAR 1985 FEB 1986 FEB 1987 FEB 1988 MAR 1988 MAR 1989 MAR 1990 APR 1991 APR 1992 MAR 1993 1050.3259.516 1701 430 2174 442 0 0 3192 3192 100 0 2003 268 2049 325 2049 325 3139 325 3138 325 3138 325 3137 526 3138 382 3137 633 3137 717 3135 3135 3134 623 3128 0 3122 1517 0 0 3128 1668 2949 663 2945 1093 2748 757 2520 894 1098 516 672 39 1931 442 53 0 3247 3247 1025 75 1525 268 300 1714 375 1714 375 3182 375 3151 375 3141 400"3140 526 3129 893 3096 832 3093 963 3087 3087 3083 770 2884 0 2723 1301 208 0 2805 1486 2437 653 2359 1092 1998 706 1813 723 1 0 19 2 46 0 39 0 13 0 0 1 0 0 1 0 0 0 1 4 1 3 6 34 7 0 177 75 116 244 122 0 0 0 0 11 2 2 15 2 6 8 15 6 13 31 0 4 18 33 4 1 4 27.73 41 9 445 211 117 218 123 WASTAGE WASTAGE CRACKING/WASTAGE WASTAGE WASTAGE CRACKING WASTAGE ID CRACKING CRACKING/WASTAGE ID CRACKING CRACKING/WAS/IGA IGA/WASTAGE

'A'PITTING/"B IGA IGA IGA/WASTAGE IGA/MECH.DAM IGA IGA/SCC IGA/SCC IGA/SCC/WASTAGE IGA/SCC/WASTAGE IGA/SCC IGA/SCC IGA/SCC IGA/SCC/PWSCC/WAS IGA/SCC/PWSCC/WAS IGA/SCC/PWSCC/WAS IGA/SCC/PWSCC/WAS IGA/SCC/PWSCC 1 0 0 0 19 0 2 0 46 11 0 2 39 2 0 15 13 1 0 5 0 8 1 15 0 6 0 13 1 13 0 2 0 6 0 16 1 28 0 23 0 5 3 70 2 49 17 78 4 18 0 6 21 142 18 70 27 52 5 16 7 14 1 0 0 0 19 0 2 0 46 11 0 2 39 2 0 15 13 1 0 5 0 8 1 15 0 6 0 13 1 34 0 0 0 4 0 18 1 33 0 3 1 1 2 4 0 27 10 72 14 58 0 8 36 73 22 20 12 7 14 20 9 18 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 0 16 0 0 0 0 4 74 0 9 2 67 6 30 24 80 0 0 0 0 132 306 56 163 81 93 214 173 114 154 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 17 82 0 28 22 15 16 29 0 46 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 3 1 1 0 1 4 5 5 1 1 2 0 7 1 1 0 0 0 0 2 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 3 0 0 0 3 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 1 0 0 0 0 0 1 0 0 0 19 0 2 0 46 11 0 2 39 2 0 15 13 1 0 5 0 8 1 15 0 6 0 13 1 34 0 0 0 4 0 18 1 33 0 4 1 2 2 4 0 24 10 75 15 59 0 9 22 24-8-10-9.2-10 9-29 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 5 0 16 0 0 0 0 4 73 0 8 2 67 6 33 24 77-1-1 0-1 137 365 51 190 102 107 230 195 113 199 6 7 8 9 10 11 12 13 14 15 912 1439 243 478 633 1170 55 203 12 23 7 9 194 284 668 1333*Returned to Setvice without Sleeve A=8 B=18 TABLE 5 M.J.Davison 19-APR-93 Rev.1 STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY COMMENTS (from TABLE 5)(1)Pulled R15 C55 and R17 C41 from the hot leg and R17 C40 from the cold leg to determine IGA conditions in the"B" steam generator.

R17 C41 and ECT indications at all frequencies, R15 C44 had only'00 kHz, Absolute ECT indication and R17 C40 had no ECT indication.

Both hot leg tubes had approximately 50%IGA, R17 C41 had a 60%SCC indication associated with the IGA.(2)Manually sleeved 5 tubes with nickel plated Inconel 600 thermally treated sleeves.Three tubes had IGA indications, two others were preventatively sleeved.(3)Sleeved 16 tubes with co-extruded sleeves, 13 with defects and 3 preventatively, Pulled Hot Leg tubes R21 C46 with a 100 kHz ECT indication, R7 C45 and R28 C45 which were clean tubes.(4)Recovery from the January 25, 1982 Tube Rupture Event including removing 26 tube sections by EDM and ID cutters along with the one tube pulled from the secondary side.(5)The four tubes identified with IGA in the"A" steam generator were sleeved with 22" tubesheet sleeves.The 78 tubes identilied in the"8" stcam generator with IGA and/or SCC in the crevice were repaired as follows: 41 9 24 1 1 tubes were sleeved with 36" brand sleeves tubes were sleeved with 28" bralxd sleeves tubes were sleeved with 22" tubcshect sleeves tube and 2 sleeves were plugged tube R34 C54 was pulled for metallurgical analysis (6)'he two tubes identified with IGA in the crevice in the"A" steam generator inlet were sleeved with 20" tuhesheet sleeve.One indication

)40%TWD in the U-bend was permanently plugged.The 70 tubes identified in the"B" steiim generator were repaired as follows: 56 10 3 1 1 tubes were sleeved with 20" tubesheet sleeves tuhes were sleeved with 36" brar~d sleeves tubes were mechanically plugged (CE removable) tube was explosively plugged tube was sleeved with a 36" brazed sleevi'.due tn the domino effect.Page 69 of 73 (7)The five tubes identified vvith crevice indications in the"A" steam generator inlet were sleeved with 27" Combustion Engineering (CE)Sleeves.One tube identified with an O.D.general indication above the secondary side tubesheet was also sleeved with a 27" CE sleeve.The 57 tubes identified in the"B" steam generator were repaired as follows: 27 27 3 tubes were sleeved with 27" CE sleeves tubes were mechanically plugged (CE removable)

CE Mechanical Plugs installed in 1985 were removed and sleeved with 27" sleeves The present sleeve installation status is 83 brazed sleeves, 88 tube sheet sleeves, 30 welded CE sleeves in the"B" steam generator with 6 tubesheet sleeves and 6 welded CE sleeves in the"A" steam generator.

(8)The 34 tubes identified with crevice indications in the"A" steam generator inlet were repaired as follows: 10 tubes were mechanically plugged (CE removable) 24 tubes were sleeved with 27" CE welded sleeve The 153 tubes identified with crevice indications in the"B" steam generator inlet were repaired as follows: 72 80 I tubes were rnechanicalfy plugged (CE removable) tubes were sleeved with 27" CE welded sleeves CE welded sleeve (installed in 1987)was plugged with a CE welded sleeve plug due to rejection of upper weld, Other repairs required in the"B" steam generator are as follows: BAW test brazed sleeves (installed in 1980)were plugged due to the loss of the primary to secondary pressure boundary as detected by the Hydro Test.Westinghouse explosive plugs installed prior to 1987 were removed due to leakage and replaced with CE welded plugs.CE Mechanical Plug on the cold leg was removed and replaced with a CE Mechanical Plug.CE welded sleeves (installed in 1987), are considered as"leak limiting" due to the marginal acceptance of'he upper welds.Page 70 of 73 (9)In the"A" steam generator, 15 tubes were plugged as follows: tubes had tubesheet crevice indications tubes for no confirmed AVB support CE sleeve for unverified upper expansion In"B" steam generator, 61 tubes were plugged as follows: 39 2 8 10 1 8 tubes had tubesheet crevice indications tubes were misplugged in the hot leg during 1987 outage tubes to box existing plugs were AVB support could not be verified.tubes for no confirmed AVB support tube for flow peaking consideration due to AVB placement Westinghouse Explosive Plugs were removed and replaced with welded"Top Hat" Plugs (10)The"B" steam generator had 9 tubes plugged for the following remons: tubes had tuhmheet crevice indications identified by a review of'the February data.These were removed f'rom service with CE mechanical plugs.tubes had signal changes from February to March., The tubes were removed from service with CE mechanical plugs.BAW tubesheet sleeve identified by the hydrostatic pressure test was removed from service with a B&W explosive plug in the hot leg and a CE mechanical in the cold leg.(11)A total of 177 tubes in"A" ste;un generator were repaired in 1989 as follows: 137 CE 27" welded sleeves (straight and periphery) 40 Tube and/or sleeve plugs 2 Previously plugged tubes stabililxd (not counted as repaired)A total of 445 tubes were repaired in"B" steam generator were repaired as follows: 367 CE 27" avelded sleeves (straight and periphery) 78 Tubes and/or sleeve plugs 1 Previously plugged tube stabilized (not counted as repaired)Page 71 of 73 (12)A total of 75 tubes in"A" steam generator were repaired in 1990 as follows: 51 CE 27" welded sleeves (straight and periphery) 24 Tube and/or sleeve plugs (includes pulled tubes R25-C63 and R31-C66)A total of 211 tubes in"B" steam generator were repaired as follows: 191 20 CE 27" welded sleeves (straight and periphery) including 28 deplugged tubes Tubes and/or sleeve plugs (includes B&W tubesheet sleeve noted during hydro)(13)A total of 116 tubes, including 24 deplugged tubes, in"A" steam generator were repaired in 1991 as follovvs: 61 41 14 CE 27" welded sleeves (straight and periphery)

CE 30" welded sleeves (straight)

Tube and/or sleeve plugs (includes pulled tube R45-C52 and deplugged tubes R17-C52 and R16-C48)A total of 117 tubes, including 16 deplugged tubes, in"B" steam generator were repaired as follows: 80 28 9 CE 27" welded sleeves (straight and periphery)

CE 30" welded sleeves (straight)

Tube and/or sleeve plugs (includes sleeved tube R5-C37, deplugged tube R26-C56 and 2 B&W Explosive plug repairs)(14)A total of 244 tubes, including 16 deplugged tubes, in"A" steam generator were repaired in 1992 as follovvs: 36 194 14 CE 27" welded sleeves (straight)

B&W explosively welded tubesheet sleeves Tube and/or sleeve plugs (including two tubes stabilized R12-C11 and R13-C11)A total of 218 tubes, including 30 deplugged tubes, in"B" steam generator were repaired as follovvs: 186 9 23 CE 27" welded sleeves (straight and periphery)

CE 30" welded sleeves (straight)

Tube and/or sleeve plugs (includes two tubes stabilized R11-C46 and R13-C89, deplugged tube R33-C75 and 3 8&W Explosive plug repairs)Page 72 of 73 A total of 122 tubes in"A" steam generator were repaired in 1993 as follows: 51 62 6 1 2 CE 27" welded sleeves (straight)

B&W explosively welded tubesheet sleeves CE mechanical tube plugs B&W explosively welded sleeve plug CE welded tube plugs A total of 171 tube, including 48 deplugged tubes, in"B" syeam generator were repaired as follows: 153 1 17 B&W explosively welded tubesheet sleeves (includes 46 de-plugged tubes)CE welded sleeve plug CE mechanical tube plug (include 2 de-plugged tubes)Page 73 of 73

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