ML17251A983

Summary Exam Rept for 1988 Steam Generator Eddy Current Insp.

ML17251A983
Person / Time
Site:	Ginna
Issue date:	02/29/1988
From:	CURTIS A E, HENRY G L ROCHESTER GAS & ELECTRIC CORP.
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ML17251A982	List: ML17251A981 ML17251A983
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NUDOCS 8803180002
Download: ML17251A983 (45)

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ROCHESTER GAS AND ELECTRIC CORPORATION 89 EAST AVENUE, ROCHESTER, NY 14649 RESEARCH AND SCIENCES DEPARTMENT MATERIALS ENGINEERING AND INSPECTION SERVICES SECTION SUfdtARY EXAMINATION REPORT FOR THE 1988 STEAM GENERATOR EDDY CURRENT INSPECTION AT R.E.GINNA NUCLEAR POWER STATION February 29, 1988 PREPARED BY: Gary L.Henry, Foreman Materials Engineering and Inspection Services Eddy Current Level III Examiner DATE: cP~/PV8'EVIEWED/

APPROVED BY: Albert E.Curtis III, Manager, Materials Engineering and Inspection Services DATE: 8803)80002 880307 PDR RDOCK 05000244 Q DCD TABLE OF CONTENTS

1.0 INTRODUCTION

1 OF 40 2.0 DATA ACQUISITION PROGRAM 2 OF 40 3.0 DATA ANALYSIS RESULTS

SUMMARY

5 OF 40 4.0 OBSERVATIONS 23 OF 40 5.0 CORRECTIVE ACTION 26 OF 40 I.0'INTRODUCTION

~The following report is a summary of the results of the multifrequency eddy current examination performed during the February 1988 Annual Refueling and Maintenance Outage at the R.E.Ginna Nuclear Power Station.The examination was performed on both the"A" and"B" recirculating steam generators which are Westinghouse Series-44 design, containing 3260 Inconel Grade 600 tubes having an outside diameter of 0.875" and a nominal wall thickness of 0.050".The examination was performed by Rochester Gas 8 Electric (RG&E)personnel that have been trained and qualified in the eddy current examination method to at least a Level I certification..

The initial data analysis review was performed by ZETEC's Computer Data Screening (CDS)System.A secondary data analysis review was performed by RG&E personnel subsequent to the CDS analysis.The data analysis was performed utilizing the Zetec DDA-4 Digital Data Analysis System.Final resolutions of all data analysis was performed by RG&E Level III personnel.

The purpose of the eddy current examination was to assess any corrosion or mechanical damage that may have occurred during the operation cycle since March 1987, and to address the concerns of the North Anna Tube Rupture Event and provide Westinghouse Electric Corporation with actual plant specific information on antivibration bar locations for evaluation of sufficient support and flow peaking.Particular attention was given to detecting intergranular attack (IGA)and intergranular stress corrosion cracking (IGSCC)in the tubesheet crevice region;pitting and wastage between the tubesheet and first tube support plate;denting at all tube support plate intersections; and wear fretting at the antivibration bar to tube intersections in the'U-bend region.PAGE 1 OF 40

/f 2.0 DATA AC UISITION PROGRAM The eddy current examination of the"A" and"B" steam generators was performed utilizing the Zetec MIZ-18 Digital Data Acquisition System.The frequencies selected were 400, 200, 100 and 25kHz, all of which were run in the differential and absolute modes.The examination was performed primarily with a standard 0.740" or 0.720" O.D.bobbin coil, with smaller diameter probes used to traverse the smaller radius U-bends.Prior to examination of the steam generators, an inspection program was established for the inlet sides of both the"A" and"B" steam generators.

The philosophy in generating this program is to provide 1005 examination coverage of each steam generator tube from the tube sheet up to the first tube support plate, along with 40K of these tubes being selected and examined for their full length.In addition, all previous tubes with indications greater than 20/through wall depth were examined as a minimum to the location of their degradation.

To determine antivihration bar support for Row 9 through Row 12, Column I through Column 92, tubes were examined from the primary face to the uppermost support on the opposite leg.Table I is a breakdown, by steam generator, of all tubes examined and to the extent inspected.

PAGE 2 OF 40 STEAN GENERATOR"A" 1988 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION TOTAL TUBES INSPECTED-HOT LEG COLD LEG 1517 188.8/48~5 TOTAL TUBES INSPECTED-FULL LENGTH (F/L)1244 39.8/INTERSECTIONS INSPECTED HTS Ni TSP H 02 TSP H 13 TSP H I4 TSP H 55 TSP H 56 TSP H EXCLUDING F/L 1878 1872 159 183 183 134~76 68~59.5~3~3~4~8./8/P)0//8 UBEND 278 8.6/N6 TSP C N5 TSP C N4 TSP C e3 TSP C 82 TSP C Il TSP C CTS 183 183 188 181 273 273 8.5.5.5~5~8~8~7 8 8/7/7 7/7/SLEEVES INSPECTED TUBES OUT OF SERVICE 94.8/TABLE 1 PAGE 3 OF 40 STEAN GENERATOR"B" 1988 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION TOTAL TUBES INSPECTED: HOT LEG COLD LES 2723 12!81 1!9!i!~!if 47~7/TOTAL TUBES'NSPECTED:

FULL LENGTH<F/L)977 35.8/INTERSECTIONS INSPECTED EXCLUDINB F/L HTS 0 1 TSP H 02 TSP H TSP H N4 TSP H 05 TSP H 06 TSF'17'PZ 1871~64>44 745 361 5~5 65.68.1Z~12 in iu~19.8/7/6/6/e/6 l UBEND 86 TSP C N5 TSP C 04 TSP C TSP C 02 TSP C TSP C CTS SLEEVES INSPECTED TUBES OUT OF SERVICE~I2&>24 424 324 g24 224>24 276 15~2/11~8/11.8 l 11.8/11~8/11.8 l 11.8 l 11.8/6.4 8~4 l This number vepvesents 1!dl af al 1 sleeves not inspected due in@the 1'787 AI&0~TABLE 1<cont)PAGE 4 OF 40 3.0, DATA ANALYSIS RESULTS

SUMMARY

The initial Computer Data Screening (CDS)Analysis and secondary manual data analysis was performed using the Zetec DDA-4 Digital Data Analysis System.Edition 18.6 Rev.5 of the data analysis software was used to analyze data from the MIZ-18 digital data acquisition system.This system provides on-line data digitization and storage on to a magnetic data cartridge.

All digital data (up to 8 channels)is sent directly to the HP 200/300 Series Computer from the data cartridge.

A message block is available should any comments be desired during data acquisition.

All data cartridges were 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.Other frequencies and their components were selected as needed for final resolution.

All recordable indications were logged into the computer and stored on floppy disk.The final report form summarizing all crevice and>205 through wall dimension (TWD)indications for each steam generator (inlet and outlet)can be found in Table 2.An explanation of the abbreviations and nomenclature used on these lists has been compiled for ease of interpretation.

Table 3 has been compiled to show a list of the total number of dents at each axial elevation and Table 4 is a breakdown of the different types of defects at each axial elevation.

The dent indications on this table are only those with signal amplitude of 5 volts and greater, which would approximate about a.0025" dent on-the diameter of the tube.PAGE 5 OF 40 s e<<<<<<<<<<RPC,R TUBANST)S)

SVKR.5 I)>>>><<<<>>>>r)or February 22'9BO Plant: (2 I NNA Outage-'BE-88A QUERY: ALL INDICATIONS 29/AND GREATER 09s50 AM<<<<<<>>>><<<<<<<<<<<<<<Page Steam Bene)'atom:

A ROM COL OUTAGE INDICATION VOLTS LOCATION INCHES CONl(ENTS REEL 17 21 24 28 9 7 9 6 7 28 9 15 17 26 38 8 18 19 13 14 33 14 28 31 9 21 23 24 17 18 23 24 26 25 27 15 23 24 23'24 29 22 23 21 22 23 21 23 25 19 29 26 22 26 27 7 RGE-SBA 7 RGE-BBA 9 RGE-BBA 12 RBE-BBA 14 RBE-BBA 17 R6E-BBA 17 RBE-BSA 18 RGE-BBA 29 RBE-BBA 29 RGE-BBA 21 RGE-SBA RBE-BBA 21 RGE-BSA RGE-SSA 21 RGE-BBA 21 RGE-BSA 21 RGE-SBA 21 RGE-BBA RGE-BBA 22 RBE-BBA 22 RBE-BBA 22 RBE-BBA 23 RGE-BBA R6E-BBA 23 RGE-SSA 23 RBE-BBA 24 RGE-SSA 25 RGE-BBA 25 RGE-SBA 25 RGE-SSA 26 RGE-SBA 26 RGE-BBA 26 RGE-SBA 26 RBE-BSA 26 RGE-SBA 27 R6E-BBA RC<-SBA 27 RGE"BBA 27 R6c SSA RGE-BBA 27 RGE-SBA 27 RBE-BBA 28 RGE-BSA 28 RGE-BBA 29 R6E-SBA 39 RGE-SBA RGE"BBA 39 RBE-BBA 31 RBE-BSA RBE-SBA 31 RBE-BBA 32 RGE-BSA 32 RGE-BSA RGE-BBA 32 RBE-BBA 33 RGE-BBA 33 RGE-SBA 33 RGE-BBA 34 RGE"SSA 34 R6E-BBA 34 RGE-SSA 35 RGE-SBA 35 RGE-SBA 35 R6E-BBA 36 RBE-SSA 36 RGE-BBA 36 RBE-BSA OD (general)OD (general)OD (general)OD (general)OD SCC OD WASTAGE OD NSTABE OD (qeneral)OD WASTAGE OD (general)OD WASTAGE OD WASTAGE OD MASTAGE OD MASTAGE OD NSTABE OD SCC OD (general)OD (general)OD (gene)al)OD WASTAGE OD MASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD NSTABE OD WASTAGE OD (general)OD (general)OD (general)OD (general)OD (general)OD (general)OD (general)OD (general)ID (general)OD (general)OD (general)OD (general)OD (general)OD (general)OD (qeneral)OD SCC OD WASTAGE OD SCC OD WASTAGE OD NSTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD MASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD NSTAGE OD MABTAGE OD WASTAGE OD NSTABE.OD WASTAGE OD WASTAGE OD NSTAGE OD WASTAGE OD WASTAGE 21/TN 22'I.TN 32 I TW 39/TW 52 X TM 22%TM 34/TW 22%TN 22/TN 22/TN 25/TW 25%TN 34%TN 22%TN 24%TN 84/TW 27/TW 27/TW 27'/TN 23%TM 23/TW 21/TW 29'/.TN 23/TN 26%TW 26 X TN 35 X TW 31/TW 27/TN 32/TN 21/TW 38%TM 25/TM 23/TN 22/TW 27/TW 21/TM 26/TW 23/TW 29 X TW 22%TM 72%TW 28%TW 78%TW 33/TW 22/TN>>/TW 29/TW 31/TW 24/TW 24/TN 29/TW 27%TM 24/TN 29/TW 21/TW 28/TN 25 X TN 23%TM 26/TN 24'/TW 23%TN 27/TM 24/TN 24/TM 28 X TW 25 X TN 1.89 HTS SF 1.99 AVB2 4.17 H6 2.87 HTS SF 9.84 HTS SF 9.93 HTS SF 9.84 HTS SF 1.55 HTB SF 2.66 HTS SF 2.76 HTS SF 4.25 HTS SF 4.25 HTS SF 1.38 HTS SF 6.44 HTS SF 5.24 HTS SF 1.59 HTS SF 1.15 HTS SF 1~43 HTS SF 1.99 HTS SF 1.47 HTS SF 1.96 HTS SF 1~36 HTS SF 3.46 HTS SF 1~15 HTS SF 15.29 HTS SF 2.91 HTS SF 1.59 Hi 19.44 HTS SF 3.39 Hi 1.89 Hl 4.53 HTS SF 2.97 HTS SF 2.93 HTS SF 2.93 HTS SF'.66 HTS SF 19.14 HTS SF 5.12 HTS SF 11.46 HTS SF 5.15 HTS SF 2.49 HTS SF 3.63 HTS SF 9.53 HTS SF 1.33 HTS SF 4.91 HTS SF 1.95 HTS SF 2.59 HTS SF 7.90 HTS SF 7.37 HTS SF 9.69 HTS SF 7.11 HTS SF 8.44 HTS SF 7.68 HTS SF 14'2 HTS SF 3.75 HTS BF 19.99 HTS SF 6.74 HTS SF 13.57 HTS SF 7.97 HTS SF 6.78 HTS SF 3.17 HTS SF 11~14 HTS SF 5.61 HTS SF 2.92 HTS SF 7.92 HTS SF 1.73 HTS SF 8.36 HTS SF 7.63 HTS SF-17,29 t 1.69 t37.49-19.69 t 1.49 t 1.89 t44.20 t 2.69-17.80 t 2.49 t 2.49 t 2.39 t 1.79 t 1.99-lb.99-4.79-11.69-17.89 t 1.79 t 2.N t 9.39 t 2.29+1~59 t 3.19 t 1.89 ti9.79 t 2.79 t 3.29+7.39+1.49 t 2.29 t 1.70+1~39-11.29 t 3.79 t 3.99 t 2.50 t 2.49 t 1.20 t 1.69-12.69 t 1~69-15.19 t 3.49 t 2.19 t 1.59+1.79+2.49 t 1~99+1.69 t 3.19 t 2.39 t 1.39 t 3.59 t 1.89 t 2.19 t 2,49 t 2.20 t 2.49 t 1.69+2.39+2.49+1~39 t 1.69+1,49 t 1'9 CPR SCC)CPR NAS NS MAS MAS)CPR WASsCPR MAS MAS MAS SCC MAS NS NS NS MAS MAS)<<MAS NAS MAS)CPR MAS NS SCC NS SCC MAB WAB WAS MAS MAS NS NS NB MAS MAS MAS MAS MAS MAS MAS NS)<<MAS MAS,<<MAS<<MAS NS NS NS NS NS 1 1)15 2)15 2 2s 17 3)17 3 3 3s17 3)17 3)17 3s17 3)17 3)19 3s 17 3s19 3 3 4 4 4)19 4s19 4)19 4)19 4)19 4s19 4 4 4)19 4s19 4)19 16)19 4r 19 4s19 4r19 4s19 4)36 4)19 4)19 TABLE 2 PAGE 6 OF 40 l>>>>>>>>>>>>k4LCs TU})AN<T)$

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ROM COL OUTAGE INDICATION VALUE VOLTS LOCATION INCHES COI(ENTS REEL 28 36 RBE-BBA 21 37 RGE-BBA 22 37 RGE-BBA 23 37 RGE-BBA 25 37 RBE-SBA 26 37 RBE-BBA 24 38 RGE-BBA 25 38 RGE-BBA 27 38 RGE-BBA 28 38 RGE-BBA 25 39 RGE-BBA 26 39 RGE-SBA 21 48 RBE-BBA 24 48 RBE-BSA 26 48 RGE-BSA 27 48 RGE-BBA 18 41 RBE-881 24 41 RGE-BBA 25 41 RGE-BSA 26 41 RGE-SBA RBE-881 28 41 RBE-SSA RGE-BBA 29 41 RGE-SBA 37 41 RGE-BBA 14 42 RGE-BBA 26 42 RGE-BBA 29 42 RBE-BBA 18 43 RGE-BBA 27 43 RGE-SBA 28 43 RGE"BBA 27 44 RBE-881 29 44 RGE-BBA RBE-SBA 4 45 RGE-SBA 12 45 RGE-SSA 28 45 RGE-BBA 21 45 RGE-881 22 45 RBE-BBA 27 45 RGE-SBA 29 45 RGE"BBA 14 46 RGE-BBA 28 46 RCE-BBA 25 46 RGE-SSA 26 46 RGE-BBA 28 47 RGE-BBA 21 47 RGE-BBA 34 47 RGE-BBA 37 47 RGE-SBA ii 48 RGE"BBA 26 48 RGE-BBA 28 48 RGE-SBA 28 49 RGE-BBA RGE-BSA 36 49 RGE-BBA 24 58 RGE-BBA 58 RBE-BSA 19 51 RGE-BSA 16 53 RGE-BSA 17 53 RGE-BSA 19 53 RGE-BBA RGE"BSA 38 53 RGE-BSA 18 54 RGE-BBA 17 55 RGE-BBA 28 58 RGE-BBA 24 58 RGE-BSA OD WASTAGE OD WSTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE GD WASTAGE 09 WASTAGE 09 NASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD (qeneral)OD WASTAGE OD WSTAGE OD (Aeneral)OD WASTAGE OD (qeneral)OD WASTAGE OD WSTAGE 09 WSTABE OD (general)OD (Aeneral)OD WASTAGE OD (general)OD (general)OD (general)GD (general)OD (general)OD (general)OD (general)OD (general)OD (gener al)OD (general)OD (general)GD (gener al)OD (general)09 (general)OD (gener al)OD WASTAGE OD (qeneral)OD WASTAGE 09 WASTAGE OD (general)OD (general)GD (general)OD (general)OD (Aeneral)OD WASTAGE OD WASTAGE OD WASTAGE OD MASTAGE OD (general)OD (general)OD (Aeneral)OD WASTAGE OD WASTAGE OD MASTAGE OD WASTAGE OD WASTAGE OD (qeneral)GD WASTAGE 09 WSTAGE 09 (qeneral)GD WASTAGE 35/TM 22/TM 21/TW 25/TN 21/TW 227, TN 24/TW 23/TN 28%'N 26/TW 26/TN 22/TM 22/TN 24/TW 25/TN 23/TW 35/TN 22%TW 22/TW 38/TW 38%TW 23%TW 22/TN 22/TN 27/TN 22/TN 22/TN 22/TN 26/TW 28/TW 22%TW 22/TW 23%TN 31%TN 32/TN 25/TN 36/TN 27/TW 39/TW 26%TW 23%TW 22/TW 22/TW 23/TN 28/TW 22/TN 22/TW 25%TM 25/TW 21/TN 28/TW 21/TW 21%TN 21%TN 28%TN 26%TN 27/TW 22/TN 21%TW 32/TW 26/TW 27/TW 21/TN 23/TN 34%TW 35%TW 27/TN 2.56 HTS SF 18.28 HTS SF 5.46 HTS SF 2.28 HTS SF 5.78 HTS SF 5.32 HTS SF 6.15 HTS SF 5.98 HTS SF 5.25 HTS SF 1.35 HTS SF 2.86 HTS SF 1.18 HTS SF 6.'64 CTS SF 1.41 HTS SF, 6.84 Hb 8.29 HTS SF 1.22 HTS SF 4.11 Hb 19.33 HTS SF 7.24 H6 2.54 HTS SF 4.81 HTS SF 5.64 HTS SF 4.99 H6-2.78 H4 1~86 HTS SF 7.82 HTS SF 5.61 HTS SF 2.14 HTS SF 4.63 HTS SF 9.76 HTS SF 2.47 HTS SF 5.52 HTS SF 8.27 HTS SF 3.23 Hf 5.19 HTS SF 5.54 CTS SF 8.46 CTS SF 9.62 CTS SF 8.44 HTS SF 4.77 HTS SF 1.17 HTS SF 16.98 CTS SF 8.24 HTS SF 5.58 HTS SF 12.41 CTS SF 17.22 CTS SF 5.98 Hb 3.45 Hi 2.38 HTS SF 4'5 HTS SF 12.72 HTS SF 9.14 HTS SF 9.59 HTS SF 4.23 H4 1.97 HTS SF 2.66 Cb 7.48 HTS SF 2.29 HTS SF 1.42 HTS SF 2.24 HTS SF 2.83 HTS SF 2.7f HTS SF 2.61 HTS SF 8.95 HTS SF 9.97 HTS SF 1.62 HTS SF+1~28+1.79+1.88+2.28+2.18+1.M+1~58+2.59+1.78+1~28+2.48+2.28+f~88+1.98+2.68+2.M+2.29+1.78+1.98+2.48+1.M+2.59+2.88+2.68-24.88+8.49+1.89+2.88+2.58+2.49+2.18+1.88+1.59+1.19+11.18+2.88-15,M-15.58-15.49+8.89+8.59+3.38-15.59+1.19+1.39-15.88-14.98-33.68-8.88-11.29+1.58+1.89+1.88+8.48-f3.69+f,98+69.18+1.78+5.28+3.98+2.88+1.59-8.18+2.98+4.28+2.98 WS)))WAS)CPR MAS MAS MAS WS aMAS)CPR WS MAS WS NAS MAS)CPR WSsCPR MAS WS)CPR WS WAS MAS WS)CPR~WAS NAS WS MAS WS WS MAS WS MASsCPR WAS NAS WAS MAS NAS WAS WS WAS)<WAS)CPR MAS)s)MAS WAS WAS AS WAS WS WS WS)CHT WS)CHT MAS MAS)CPR WAS)+WAS WS WS WAS)CPR WAS)XMAS WS WAS 4s19 4)19 fb)19 16}36 16 4s 19 16 4 4 4)19 4)19 14)19 4)19 4)19 4)19 4s19 4)19 4)19 4)19 4)19 4)19 4)19 4)19 4s19 4)36 5s28 5)19 5)28 5)29 5s28 5)28 5)36 5}36 5)28 5)18 5)28 5)28 5s28 5)29 5)28 6)21 6)21 6)21 6)21 6)21 6)21 b)21 6)21 6s18 6)21 6)21 6)21 6)21 6)22 7)22 7)22 7s15 7)25 7)25 7)25 7)25 7s25 8)25 8}25 15s26 9s 26 TABLE 2 (con't)PAGE 7 OF 40

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Mon C<<bru<<ry s Plant-GINN)-")Outage: RGE-SSA~QUERY: ALL INDICATIONS 28X AND GREATER 22'9SS fS)SS AM<<<<>><<<<<<<<<<<<<<<<>>ge Pa am Gener ate)r-A ROW COL OUTAGE INDICATION VALUE VOLTS LOCATION INCHES CO)STS REEL 17 59 RGE-88A 24 59 RGE-88A 28 68 RGE-88A 13 61 RBE-88A 14 61 RGE-88A 15 61 RGE-88A 1'9 61 RGE-88A 28 61 RGE-88A 19 64 RGE-88A 28 64 RGE-88A 15 65 RGE-88A 16 68 RGE-88A 9 69 RGE-88A 14 69 RGE-88A 6 78 RGE-88A 9 78 RGE-88A 6 71 RGF=88A 12 71 RGE-88A 8 73 RGE-88A 8 74 RGE-88A'74 RGE-88A RBE-88A 82 RGE-88A 16 87 RBE-88A TOTAL TUBES TOTAL INDICA OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD (qeneral)OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD MASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD WASTAGE OD (general)OD (general)FOUND TIONS FOUND 21/TM 23 X TM 33/TW 35 X TM 28/TW 25/TW 22/TN 33 X TW 22/TN 22 X TN 28 X TN 27/TW 22 X TW 35/TW 21/TN 25/TW 21/TW 29/TN 23/TW 21XTW 22/TN 24/TM 25/TW 36/TN 143 158 3.91 HTS SF 2.39 HTS SF 1.61 HTS SF 3.77 HTS SF 6.39 HTS SF 6.12 HTS SF 4.62 HTS SF 3.81 HTS SF 9.58 HTS SF 1~12 HTS SF 5.57 HTS SF 16.77 CTS SF 2.84 HTS SF 9.88 HTS SF 3.21 HTS SF 4.81 HTS SF 7.54 HTS SF 1.13 HTS SF 1.68 HTS SF 4.33 HTS SF 2.84 HTS SF 7.72 HTS SF 2.46 HTS SF 9.65 HTS SF+2.18+1.19+1.38+1.59+2.28+2.58+1.49+1,79+1~49+1.98+1.58-12.19+1.29 i 2.38+8.68+1.89+8.69+1.69+8.98+1.19+1~89+1.28+4.38+11.98 MAS MAS MAS MAS MAS MASsCHT MAS MAS MAS WAS NAS NAS NAS NAS NAS NAS NAS MAS)CPR MAS NAS NAS WAS 9)26 9)26 9)27 15)27 9)27 9)27 9)27 9s27 18)28 18)28 18s28 12)29 12)18 12.12 12)18 12 12)18 12 12 12)18 12)18 13 16 TOTAL TUBES IN INPUT FILE=3268 TOTAL TUBES It(SPECTED

=3124 TABLE 2 (con't)PAGE 8 OF 40 I<<<<<<<<<<<<)ss)ting TISAN{T)s))VQR, g,i)l)<<<<<<<<<<<<)son

<<beau<<r Y 22()%0 Plant-SINN)"-r Outage: RBE-888'@JULY: AL'L INDICATIOi(S 28%TM AND GREATER 1))20 Qs<<<<<<<<<<<<<<<<<<<<a<<Page Bream Bener atar B ROM COL OUTAGE INDICATION VALUE VOLTS LOCATION INCHES COMMENTS 18 8 7 9 9 9 9 11 18 11 38 11 13 22 18 13 17 18 28 17 24 16 17 19 28 24 24 24 38 24 5 14 45 48 23 24 6 36 4 9 27 15 28 41 17 13 25 6 8 13 28 8 28 22 38 1 2 6 RGE-SBB RGE-SSB 13 RGE-SBB 16 RGE-88B 16 RGE-SBB 18 RGE-88B 19 RGE-SBB 19 RGE-SSB 28 RGE"SBB 21 RGE-88B 21 RGE-SSB 22 RGE-SSB 22 RGE-SSB 22 RGE-BSB 23 RGE-88B 23 RGE-88B 23 RGE-SSB 24 RGE-BBB 24 RGE-88B 24 RGE-8SB 24 RGE-SSB 24 RGE-BBB 25 RGE-SBB 25 RGE-88B 26 RGE-SSB 26 RGE-SBB 26 RGE-SBB 26 RGE-SSB 26 RGE-88B 27 RGE-SSB 38 RGE"SSB 31 RGE"SBB 32 RGE-88B 33 RGE-SSB 33 RGE-SBB 39 RGE-88B 48 RGE-SSB 4f RGE-888 41 RGE-888 4f RGE SSB RCE-88B 42 RGE-BSB 43 RGE-SSB 45 RGE-SSB 45 RGE-SSB 45 RGE-SBB 46 RGE-SBB 46 RGE-SSB 46 RGE-SSB 48 RGE-88B 49 RGE-SSB 58 RGE-SBB 58 RGE-BSB 51 RGE-BSB 51 RGE-SBB 51 RGE-BBB 51 RGE"88B 52 RGE-BBB 55 RGE-88B 56 RGE-BBB 56 RGE-SSB 58 RGE-SBB RGE-SBB RGE-BSB RGE-88B 61 RGE-SSB 62 RGE"SSB OD (general)OD (qeneral)OD SCC OD WASTAGE OD WASTAGE OD (geneval)OD (general)OD (general)OD (gener al)OD (general)OD (general)OD (geneval)OD (qeneral)OD SCC OD (general)OD (general)OD (general)OD (general)OD (general)OD (gener al)OD (general)OD (geneval)OD (general)OD (general)OD WASTAGE OD WASTAGE OD (general)OD (general)OD (general)OD WASTAGE OD WASTAGE OD SCC OD WASTAGE OD SCC OD SCC OD (qeneral)OD SCC OD WASTAGE OD (general)OD (general)OD (qeneraf)OD WASTAGE OD SCC OD WASTAGE OD WASTAGE OD SCC OD WASTAGE OD WASTAGE OD cCC OD SCC OD SCC'OD WASTAGE OD WASTAGE OD WASTAGE OD MASTAGE OD WASTAGE OD SCC OD WASTAGE OD SCC OD WASTAGE OD (qeneral)OD SCC OD SCC OD SCC OD SCC OD SCC OD (gener al)38 X TW 39/TN 81%TW 28%TM 28/TW 28/TW 28 X TW 28/TW 21/TW 24/TM 28/TW 28/TN 24/TW 68/TW 22/TW 21/TW 25%TW 21/TN 22/TW 28/TW 28/TM 21/TW 28/TW 22%TW 28/TW 31%TN 33%TN 28/TW 28/TN 28/TN 21%TW 28/TW 37 X TM 53 X TW 78/TW 24/TN 91/TW 26/TN 22/TW 22/TN 34%TM 22/TM 68/TW 23/TN 28/TW 74/TW 21%TW 35/TW 87%TW 76%TM 68/TN 28 X TM 29/TW 28/TW 26/TW 28/TM 78/TW 25 X TM 85%TM 22/TM 37 X TN 91/TN 53/TN 75/~TM 97%TN 84/TM 25/TW 1.72 C2 2.36 Cl 1.69 HTS SF 8.99 HTS SF 8.95 HTS SF 6.92 HTS SF 9.16 HTS SF 12.23 HTS SF 8.88 HTS SF 18.48 HTS SF 9.21 HTS SF 5.86 HTS SF 5.59 HTS SF 8.83 HTS SF 7.72 HTS SF 6.78 HTS SF 2.89 HTS SF 8.27 HTS SF 8.63 HTS SF 5.97 HTS SF 6.99 HTS SF 6.55 HTS SF 9.59 HTS SF 6.92 HTS SF 8.83 HTS SF 9.96 HTS SF 11.21 HTS SF 6.18 HTS SF 18.23 HTS SF 11.84 HTS SF 9.16 HTS SF 1~52 HTS SF 1.53 HTS SF 8.91 HTS SF 8.76 HTS SF 1.59 HTS SF 4~51 HTS SF 6.28 HTS SF 4.76 HTS SF 4.58 HTS SF 3.24 HTS SF 4.32 HTS SF 4.25 HTS SF 1.75 HTS SF 4~91 CTS SF 8.66 HTS SF 9.25 CTS SF 1~18 HTS SF 1~67 HTS SF 3.64 HTS cF 8.98 HTS'SF 6.47 CTS SF 3.25 HTS SF 2.66 CTS SF 11.39 CTS SF 4.97 CTS SF 3.62 HTS SF 8.11 CTS SF 1.34 HTS SF 2.78 CTS SF 1.87 HTS SF 3.99 HTS SF 1~64 HTS SF 2.85 HTS SF 1,39 HTS SF 3.53 HTS SF 16.78 CTS SF-17.18+1.18+8.98+1.38+1.78+1.58+f.58+1.78+1.58+1~28+1~68-18.88+2.88+1~28+1.68" 1~38-1~38-1.68-1.28-1.58-1.78-1.38+1~58+1.40-1.28-1~78-1.68+1.28+1~88-17.88+1.88-lb.18-12.88+41.58-18.48+8.50+1~88+1~68+1~28+8.78-18.38+8.58+1.78-7.10+1~70+3.58-f7.68-13.28"lb.58+1.68+3.28+1.68+2.10+1.68-11.68+F 88-13.38+1~68+2.58-17.38-lb.88"17.48-17.98-12.98-9.68 SCC MAS WAS CPR MAS MAS MAS<<MAS SCC MAS MAS WAS MAS MAS SCC MAS SCC SCC MAS MAS SCC MAS MAS)<<MAS MAS,SCC MAS MAS)CPR SCC SCC SCC MAS MAS MAS MAS MAS SCC MAS MAS)SCC MAS MAS SCC)HISS PLUGS D 1-59 (HL)SCC)HISS PLUGGED 1-59 (HL)SCCs HISS PLUGGED 1 59 (HL)SCC)HISS PLUGGED 1-59 (KL)SCC CPR)MAS is28 1)20 2 2 2)f7 21 17 2s 1/2)16 2)17 2)17 2s16 2)17 2s16 2 3)16 3 3)17 3 3 3 3 3 3 13 4 13)32 4)28 4)28 4)28 13)32 5 5)33 5)17 5 21)26 5)21 5 6 22'l 33 6)23 6)23 6)23 6)23 6)23 6 7)24 7 7s29 7)27 8)11 8)11 8)11 8)11 9 25)33 TABLE 2 (con't),PAGE 9 OF 40 i osaar~R0),K T))BAN<TS)){VCR, 5,0)eseoso S)o Fsbruary 22'980 i Plant-(5INNA Outage-RGE-88B'UERY: AlJ INDICATIONS 28/TM AND GREATER 11)50 A)S iisosso oeasao Page SWam Generator-B ROM COL OUTAGE INDICATION VALUE VOLTS LOCATION INCHES CON)(ENTS 28 62 RGE-88B 22 63 RGE-88B 28 63 RGE-88B 36 63 RGE-88B 26 64 RGE-88B 4 67 RGE-88B 6 68 RGE-88B 2 72 RGE-88B 2 73 RGE-88B 26 79 RGE-88B'9 81 RGE-88B 2 82 RGE-88B OD MASTAGE OD MASTAGE OD WASTAGE OD (qeneral)OD MASTAGE OD MASTAGE OD MASTAGE OD SCC OD SCC OD (qeneral)OD SCC OD SCC 22/TM 28/TM 23%TM 25%TM 28/TM 21/TM 25/TM 53/TM 91%TM 25/TM 82%TM 85%TM 4.68 HTS SF 18.51 HTS SF 4.95 HTS SF 3.61 HTS-Hl-5.39 HTS SF 1~53 CTS SF 2.12 CTS SF 3.58 HTS SF 2.17 HTS SF 4.39 HTS-Hl 1.58 HTS SF 2.58 HTS SF+1~58+2.88+1.78+19.89+2.68+2.28+1~98-lb.58-17.28+11.18-15.98-lb.78 MAS IGA MASsCPR MAS)CPR NSY MAS MAS MAS SCC SCC SCCs IGA SCC 9 9)38 9 38 6,39 9s31 25)33 18)25 11 11 15 11)12 11 TOTAL TUBES FOWi D TOTAL INDICATIOiNS FOUND 74 79 TOTAL TUBES IN INPUT FILE=3269 TOTAL TUBES INSPECTED=2899 TABLE 2 (con't)PAGE 10 OF 40 LIST OF)20'5 INDICATION AND CREVICE INDICATION NOMENCLATURE To of List Information SG-Steam Generator and Leg (ie: 1=A, 2=8 and 1=Inlet, 2=Outlet)ROW-ROW number from the tube identification.

COL-Column number from the tube identification.

VOLTS-Amplitude of the measured indication signal response.XTWD-Percent through wall from O.D.based on measured signal.CH8-Channel from which indication was determined.

LOCATION-Location of indication relative to tubesheet or support plate.Information Under Value (20-Measurable indication less than 20K through wall.SAR-Multiple indications interfering with a depth determination (IGA-SCC).XX-The measure percent through wall of the deepest penetration.

ADS-Absolute Drift Signal Indicative of IGA.Information Under CH8 I-Indication determined and measured with 400 kHz differential for final interpretation.

M2-Indication determined with absolute mix, depth cannot be accurately determined, but based upon amplitude is felt to be above 40ÃIGA.PAGE 11 OF 40 I

L'IST OF>20K INDICATION AND CREVICE INDICATION NOMENCLATURE (CON'T Information Under LOCATION HTS SF-Secondary face of inlet tubesheet.

TSP-Tube Support Plate CTS SF-Secondary face of outlet tubesheet.

AVB-Antivibration Bars-XX.X-Depth below the secondary face of the tubesheet or support plates where the indication is located.+XX.X-Height above the secondary face of the tubesheet or support plate where indication is located.H-Hot Leg C-Cold Leg PAGE 12 OF 40 I i'lant'-BINNA.Outage-'GE-SSA S'team Generator:

A DENT-VOLTS LOCATION<18, gg 18.gg-1 28.rgg-2>2 7~9 P TOTAL l.2~3>>4~5.6.7.8.1 fij.11.1 2'.13.14.15~16.17.18.}'P.28~2}, 22~23.25~26~27~28~38.31.32~34~35~36.37~38.3'P.48~4}.HTS PF HTS HID HTS SF HTS-Hi Hi Hi-H2 H2 H2-H3 H3 H3-H4 H4 H4-H5 H5 H5-H6 H6>H6 AVB}>AVB}AVB2>AVB2>AVB3 AVB3>AVB4 AVB4>C6 C6 C6-CS C5 C5-C4 C4 C4-C3 C3 C3-C2 C2 C.-C}Cl Ci-CTS CTS SF CTS MID CTS PF OTHER TOTALS PERCENT: g 28 158 15 58 8 8 8 1 6 6?rg 1 g Qj g g 8 8 1 6 74 g g 414 3~~6 g 2rjj 176 83 7 11 rij 1 g g 1 7 1 7 g fij r3!8 g g g 5 g 6 14 8 8 1 15 16 8'p g 8 8 448 35m 3 8 3}8 6 6 ig 1 1 g 8 8 16 g 8 rg g 8 g qj 8 2 8 4 8 6 8 5 g 5 g fjj 8 g 8 8}68 8 1 73 5 lg g 1 g rg 8 12 rjj 7}6 8 8 g g re g 7 13 g 6 g 6 g?g 3 g g fg g 8 238 18.S g 58 377 24 258 27 36 1 1 7 i}7 2g ref 1 tg re 8 g 1 g 23 56 1}9 7 26 8 22 2 24, 83 8 8 1268 TABLE 3 PAGE 13 OF 40

,~Plant-GINNA ,Outage-'GE-88B Steam Generator:

B DENT-VOLTS LOCATION<18.88 18.88-1 28.88-2>29.99 TOTAL 1.4~4~5~6~7;8~9~18~11.12 13.14.15.16.17~18.19.2g, 2~24.25~26.27.nS 29~38.31~32.34.36.M7 38~39.48.41.HTS PF HTS HID HTS SF HTS-Hl Hi Hi-H2 H2 H2-H3 Ha H3-H4 H4 H4-H5 H5 H5-H6 H6>H6 AVB1>AVB1 AVB.>AVB2>AVB3 AVB3>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-C3 C3 C3-C2 C2 C2-Cl Cl Ci-CTS CTS SF CTS HID CTS PF OTHER TOTALS PERCENT-g 58 131 6 8 1 g 1 8 1 12 8 18 8 4 g g!if 8 19 8 1 8 g g 1 285 19 1 8 538 55.5 g 127 8 rlf 8 g g 4 ftf 2 13 lCf 8 8 1 g g g g 6 13 8 Cg C<.i g 1 1 3 8 2 2 35 g 263 27.5 8 14 34 g 5 1 g 8 8 8 8 g g 8 g 7 g 8 g 1 8 1!if 1 g 8 g g 78 8~2 g 8 21 14 2 g 2 g 3 5 g 8 g g 1 Cif rif 8 8 8 8 8 8 8 g 2.8 2 g 2 g/if Clf g 8 84 8.8 Cg 184 313 28 28 1 8 8 2 6 16 17 8 1 6 g 8 g 27 8 1 1 4 24g 21 2!if TABLE 3 (con't)PAGE 14 OF 40 t.P,lant-GINNA Outage: RGE-88A Steam Generator:

OD WASTAGE TW LOCATION SPECIAL'28 28-39 48-49)49 TOTAL i.3~4~5.6.7.8~18~11.12~14.15~16~17.18~19.28~~>>~24 25.26.27~28~38.31.&2~33~34.35~36.37~38.48.41.HTS PF HTS HID HTS SF HTS-Hi Hl Hl-H2 H2 H2-H3 H3 H3-H4 H4 H4-H5-H5 H5-H6 H6>H6 AVBi>AVBi AVB2)AVB2>AVB3 AVB3>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-C3 C3 C3-C2 C2 C~-Ci Ci Cl-CTS CTS SF CTS HID CTS PF OTHER TOTALS PERCENT-8!if g 8 g g 8 8 g 8 g 8 g g g!3 8 8 g g!ij g g 8 g g g g g g 8 g g!if 8 8!if!if tij 8 8~8 8 i>i 7 ref 8 1 8 8 g!ij 8 g 8 g g 8 8 g g 8 8!if g rgj g 8 8 8 8 8 8 g g 1 g g 8 784 89~1 g g'95 g g!8 g 8 8 8 g 8 8 8 tif 8 8 g g g g g g g g 8 8 g g g 8 8 g g g g g 8 g 96 lg.9 g 8 8 g g g!8 g g fjf g g 8 g g!if 8 8 g g 8 8 8 g rg g 8 ref 8!if g g tif g 8!ij!if g 8 tg'rg 8 8.8 8 8 g g g g g 8 g 8 g 8 8 g rij 8 8!if g 8 g 8 8 g g 8 g fg 8 g fjf g g g g 8 8 8.8 8 8 798 8 8 8 8 g 8 g 8 8 8 g 8 g g!ij g g g g g 8 8 g 8 g 8 g g!ij 1 g 76 1 8 g TABLE 4 PAGE 15 OF 40

>>>>>>>>>>>>RQ1K TUt!AN (Ttt)!VCR 5 ttl)>>>>>>>>>>>>

Monday F>>bruary Plant: SINNA Outage-RGE-88A 22t tCIQQ 12ttth PH>>>>*>>>>>>>>>>>>>>>>>>Page am Generator-A OD SCC/Tfrf LOCATION SQR<28 28-39 48-49>49 TOTAL i.2.3~4, 5.6.7~8~9~18.11.12~1 D~14~15.16.17~18.19.2g 21,~a~2~~24~25~27~28~29'.38.wi.ZJ~a4~~5~36.D7~'38.48~41.HTS PF HTS MID HTS SF HTS-Hi Hl Hi-H2 H2 H2-H3 Ha H3-H4 H4 H4-H5 H5 H5-H6 H6>H6 AVBl>AVB1 AVB2>AVB2>AVBZ AVBZ>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-C3 C~CZ-C2 C2 C2-Cl Cl Ci-CTS CTS SF CTS MID CTS PF OTHER g r~$!)i rif g ti$g g 8 8 8 8 g 8 8 8 g 8 g g rif 8 g 8 g g 8 g tgf 8 g!if g g g!if 8 g 8 g g g i49 TOTAL 1.2.5.6.7.8.9~18.11 12~1.4~15.16~17.1.8~19.28.21'2~22e 24 25.27 28.29~38.ai.~2~i4.Z5~~6.27-38.u9.4g, 41'TS PF HTS HID HTS SF HTS-H1 Hl Hi-H2 H2 H2-HZ Ha Hi-H4 H4'H4-H5 H5 H5-H6 H6)H6 AVB1)AVB1 AVB2>AVB=>AVBZ AVBZ>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-C~C3 C~~-C2 C2 C2-C1 Ci C1-CTS CTS SF CTS HID CTS PF OTHER TOTALS PERCENT-!i!8 8 8 8 8 8 8 g g g 8 g 8 8 8 8!i!8 8 8 8 g 8 g r3!i!g 8 g 8 g ri!g 8 g 8 8 igg.8 rg fi!!i>g g g 8 g g g 8 8 g 8 g lj r3 ri!8 8 g 8 8 8 8 g lg g g g g 8 g 8 8 g g g 8 g 8.8 8 g g 8 g 8 8 8 8 8 8 8 8 8 gf g 8 8 g 8 8 g g 8 8 g 8 g g g g 8 8 g 8 g 8 g 8~8 g 8 8 8 8 8 g rg fg 8 8 8 8 8~g r3 8 g g g g 8 g 8 g g g g 8 8 g g rg 8 g r3 g g g g 8~8 g g g g g 8 8 8 g 8 g 8 8 8 g 8 g g 8 8 8 8 8 8 8 8 g 8 8 g 8!8 8 g g g 8 r3!i!8 8 lg 8 8 8 8 g 8 8 8 g g 8 8 8 8 8 8 8 8 8 g g 8 8 8 8 8 g g g g 8 8 8 g 8 8 8 g TABLE 4 (con't)PAGE 17 OF 40

~P,l an t: G INNA ,Outage-" RGE-88A OD (eneval)/TW LOCATION<28 2g-Zq 48-4q>49 TOTAL 4~5~6.7.8.'p.18.11.12.13.14'5.16.17'8.1'p.2g, 21~22~24.25~26~2'7~28~34~i5.36~~7~a8.~9.4g, 41.HTS PF HTS MID HTS SF HTS-Hi Hi Hi-H2 H2 H2-H3 H3 H3-H4 H4 H4-H5 H5 H5-H6 H6>H6 AVB1>AVB1 AVB2>AVB2>AVBZ AVB>>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-Ce C~CZ-C2 C2 C2-Cl Cl Ci-CTS CTS SF CTS MID CTS PF OTHER TOTALS PERCENT: g 8 8 g g 8 g 8 g 8 g 8 8 8 fjf 8 g g!iS g 8 g g g g 8 8 zrf 8 8 g g 1 8 8 8 8 g!if 8 1 1.4 rd 1 8 5 g 1 8 g 8 8 g~g 8 g 8 8 g g g g 1 g!ij g 8!3 8 8!if g!if!if 8 8 1 g g g 15 2 cgf~5 g 7 g 8 4 g 8 8 2 8 8 8 1 8 5 g g 8 g 8!if!ij g 8 8 r!ig 8 8 8 g 8 8 8 8 7 g g 57 78.1 8 g!if 8 8 8 g 8 8 g 8 g 8 8 8 8 g g 8 g 8!if 8 g g rd ,8'8 8 8 g g g g g g g g!ij!if 8.8 8 8 8 8 8 8 8 rg 8!3 g 8 8 g 8 8 g g 8 8 8 r~j g g g 8 g g 8 8 8 g g 8 g g g g g 8 g,g 8 8 8 34 g 5 8 8 8 2 8 8!ij 8 8 g g 1 g 8 1 8 g 1 8 g 8 8 g g g g 8 8 1 8 1PS!if 8 7&TABLE 4 (con't)PAGE 18 OF 40

,: Plant-GINNA ,Ou'tape: RGE-88B OD TW LOCATION SPECIAL<2!i!2!d-3'P 4!d-4'7>49 TOTAL i.3~4, 5.6~7~8.18.11.12.13.14~f5.16~17.18.1'P~28.2f.~~24.25~26~28~2'P.38.31.34.35~36~D7~38.48.41.HTS PF HTS MID HTS SF HTS-Hi Hi Hf-H2 H2 H2-H3 H3 H3-H4 H4 H4-H5 H5 H5-H6 H6>H6 AVB1>AVBi AVB2>AVB2>AVB3 AVB3>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-C3 C3 C3-C2 C2 C2-Ci Ci C1-CTS CTS SF CTS MID CTS PF OTHER TOTALS PERCENT-8 g g 8 g 8 8 8 g g g 8 g!jf 8 8 g g 8 8 g 8 rg g 8 8 8 g 8 g 8 g 8 8 8 g 8 g 8 8 g g~g 8 f!i!g.31 g g 8 g 8 8 8 8 8 8 8 8 g 8 8 g 8 g 8 g!i~g g g g!i!8 g 1 8 167 1 g 8 8 413 94.1 g 8 8 16 8 g 8 g!iS g 8 8 g 8 g 8 8 g 8 8 g g ig g 8 g ri!g 8 g g 8 8 8 g g ig g g g g 26 5.9 g 8 g'rg g 8 8 rg g g g 8 8 8 g 8 g g g 8 8 g g 8 g g 8 g 8 8 g 8 8 rg g 8 8 8 8 g 8.8 g 8 g g ri!8!i!8 g 8 8 g g 8 g 8 g g'8 g 8 8 g 8 g 8 8 8 8 8 g 8 g 8 g g g 8 g g g g 8,8 rg 18 g 247 8 8 8 g 8 8 8!i!g 8 g g 8 g 8 8 8 g 8 rj!8 g g 8 g 8 g g 8 1 8 177 1 g 8 g TABLE 4 (con't)PAGE 19 OF 40

<<>>*>>>>>>MLr.TURAN!TM)rVLR.5.S)>>>>>>>>>>>>

Mrrnd<<y C>>brush y Plant G INNA Outa8e: RGE-SBB 22r lORQ 12<04 PM>>>>>>>>>>>>>><<>>>>>>>>I a)e m Generator:

B LOCATION OD SCC SG}R<.8 2!if-39 4!if-O'P>49 TOTAL i.2~5.6.7.8.18.11.lz.13m 14.15.16~17.18~1'P.28~21~22~25~26~27~28.3 Vlf 31~32~33~34.35.36.37.38.4!i f, 41.HTS PF HTS NID HTS SF HTS-Hi Hi Hl-H2 H2 H2-H3 H3 H3-H4 H4 H4-H5 HS H5-H6 H6>H6 AVB1>AVBi AVB2>AVB2>AVB3 AVB3>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-C3 C3 C3-C2 C2-Ci Ci Ci-CTS CTS SF CTS MID CTS PF OTHER TOTALS PERCENTS 8 2 8 8 8 8 8 rif g rif rif g 8 g 8 g 8 rlf!if g 8 8 g 8 8 g!if 8 g g 8 g 8 8 8 8 g 8 2 8~3 fg 8 g 8 g!if 8 8 g 8 8 8 8 8 8 8 g 8 g 8 8 8 8 g 8 8 g 8 g g g g g g g g 8!if g rif g rif.rlf g 1 g g 8 g g g 8 g 8 Cif g g g 8 8 8 rlf 8 8 8 8 g 8 g g 8 g g g 8 g g 8 g rif g 8 g 1 4.2 Cif g ref!if g g g 8 g 8 8 rif 8 8 g g g rif Cif g 8 8 g 8 g 8 8 rif g g g g g 8 rif g g g.r g 8 g 8 8 8 8 rif!if g 8 8 g 8 g 8 8 8 8 8 g 8 8 g rlf g g g g rlf g g g g g!if!if!if 21 87.5 8 24 g g 8 8 8 8 8 g 8 8 g!3 8 8 8!if 8 g 8 8 g 8 8 8 g 8 g g g g 8 g TABLE 4 (con't)PAGE 20 OF 40

.Plant: GINNA!QUA'age: RGE-88B B LOCATION OD I GA-%TN ADS<28 28-39>49 TOTAL 1~~~3a 4~5.6.7~8~18~11.13.14.15.16.17~18.19.2g, 21'2'D e 24 25.26.27.28 38.3a.OA~34.35.36~'7~38.39~4g, 41.HTS PF HTS MID HTS SF HTS-Hi H1 Hi-H2 H2 H2-H3 H3 H3-H4 H4 H4-H5 H5 H5-H6 H6>H6 AVB1>AVBa AVB2>AVB2>AVB3 AVB3>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-C3 C3 C3-C2 C2 C2-C1 C1 Ci-CTS CTS SF CTS MID CTS PF OTHER TOTALS PERCENTS 8 24 gj g g g g!i!r<.!8 8 8 g 8 g 8 8 8 g g 8 g g 8 8 8 g 8 g g 8 8 g g!i!8 g g 8 g 24 188~!i!k!8 8 0!<3 8 g 8 g 8 g 8 8 g g 8 8 8 8 g 8 8 8 g g g ig g 8 8 8 rg 8!i!g 8 8 8 8 8 8.8 8 g 8 8 g 8 rg 8 8 8 8 8 g g g 8 8 8 8 8 g 8 g 8 8 g 8 g g 8 g 8 8 g<i!8!i!8 g<3 g 8 g, g 8 g 8 8 8 8 g g , g g g 8 g 8 rg<3 g 8 g graf g 8 8 8 g g ri!g g 8 g 8<3 g 8 g 8 g!if g 8 g 8~8 g 8 8 8!i!8 g g!i!8 g 8 8 8 g 8 8 8 g 8 8 8 8 8 g g 8 rg g g g 8 g 8 g g 8 8 g g 8.8 24 g 8 g 8 8 8 g 8 g g g 8 g 8 g 8 g 8 8 g 8 8 8 g 8 rg g 8 8 8 8 g g g<jf 8 g TABLE 4 (con't)PAGE 21 OF 40

'lant-.BINNA'Outage-RGE-88B St am Generator-B OD (ener al)/TM LOCATION ADS (2!ij 28-39 48-49 ,>49 TOTAL 2~5.6.7.B.18.11.12~13.14.15.16~17.18.19~1~22v 24.25.27~28.Zr(j.r M2~3Z~Z4.25~>6.~i 7~ZB.4g, 41~HTS PF HTS MID HTS SF HTS-Hi Hi Hi-H2 H2 H2-HZ H3 H3-H4 H4 H4-H5 HS H5-H6 H6>H6 AVB1>AVB1 AVB2>AVB2>AVB~AVBZ>AVB4 AVB4>C6 C6 C6-C5 C5 C5-C4 C4 C4-C3 C3 Ce-C2 C2 C2-Ci Ci Ci-CTS CTS SF CTS MID CTS PF OTHER 8 g g g!if 8 r(j 8 r(j 8 8 8 r(j!if g 8 8 g g g g 8 g 8 8 8 g!if 8 g 8 g g 8 g g g 16 g 26 g g 8 g 8 8 8 8 8 g 8 8 g r(j r(f g g 8 8 8 g 8!if r(j g 8 g g g!if g 2 g 8 8 8 1 r(j g 18 8 g 8 g 8 g g g g g 8 g r(f g 8 8 8 8 V(j!if 8 8 g r(f r(j g 8 r(j 1 g 1 g 8 1 g g g 8!if t(f g g 8 8 8 8 8 rrj 8 g g 8 8 8 8 g 8 g 8 8 g g r(f g g r(f 8 g g 8 8 g 8!if g g g g g 8 g g g 8 8 8 g g g g 8 8 g g g g!if 8 8 r(j g r(f!if cZj r r(j g g 8 8 g 8 g g g 8 g 44 8 8 g g 8 g 8 r(f 8 g 8 g g g 8 g g g 8 g g 8 8 8 g g 8 g g 1 8 2 g g TOTALS PERCENT-g 45 Zi 8 8.8 59~-48.8!if.!if 8 r(f.g 76 TABLE 4 (con't)PAGE 22 OF 40 P 4.0 OBSERVATIONS The results of the examination indicates that intergranular attack (IGA)and intergranular stress corrosion cracking (IGSCC)is still active within the tubesheet crevice regions on the inlet side of each steam generator.

The IGA/IGSCC is primarily located in the"8" steam generator with 41 total indications detected.In the"A" steam generator?indications were detected.Table 5 shows the steam generator IGA history.GINNA'S STEAM GENERATORS CREVICE CORROSION INDICATION HISTORY 8-Steam Generator (A-Steam Generator)

Not Sizeable 0-25'A 26-50Ã51-75Ã76-100/o A-S/G TOTAL B-S/G TOTAL March 1979 December 1979-0 Apri 1 1980 November 1980 April 1981 February 1982 October 1982 April 1983 March 1984 March 1985 February 1986 19 27 11(3)23 3(2)February 1987 82(17)February 1988 22(3)5 3(l)9(2)7(l)0(i)9(l)i4(i)8(l)i6(3)7(2)16 27(l)25 46(13)11(2)(0)(0)(0)(0)(0)(0)(1)(4)(1)(2)(5)(34)(7)31 14'9 153 41 TOTALS 195(25)27(3)49(2)87(8)149(16)(54)507 TABLE 5 PAGE 23 OF 40

4.0 OBSERVATIONS

(CO~~The cause of the inlet tubesheet crevice corrosion indications is intergranular attack and intergranular stress corrosion cracking of the mil-annealed Inconel 600 tube material.This form of corrosion is the result of the tubesheet crevices forming an alkaline environment.

This crevice environment has developed over the years as deposits and active species like sodium and phosphate, have reacted, changing a neutral or inhibited crevice into the aggressive environment that presently exist.A large volume, typically<20ÃTWD (Through Wall Dimension) wastage type condition exists just above the tubesheet secondary face.A small percentage of the tubes, generally toward the center of the bundle, have this condition.

Several of these tubes did have penetrations

)20%TWD.These tubes were.affected by the original water chemistry conditions when phosphate was used as a buffering medium and have not seen further degradation since 1975.Small indications of probable copper deposits were also found in the tubesheet crevice region randomly located throughout each steam generator.

Based on studies performed with copper plated on Inconel tubing and the phase relationships of these signal responses at the different inspection frequencies the indications can be attributed to copper deposits and not a defect condition.

Minor denting has been detected at the tubesheet secondary side 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 at the tubesheet secondary side face.No tubes were found which obstructed the passage of a 0.720" O.D.probe.In general, minor distortions of most of the tube support plate signals were seen.PAGE 24 OF 40

4.0 OBSERVATIONS

i'T 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 does not indicate any change in the extent or magnitude of denting from what has been detected by previous inspections.

Several indications were detected in the cold legs of the"A" 8"B" steam generators in and around tube R21-C46.A review of previous years data revealed these indications to be present.They appear as a shallow ID indication (20K which were confirmed visually to be an expansion of diameter within the tubesheet.

This was caused by a cam-lock expansion device which was used in earlier years to suspend lead blankets from the tubesheet primary face.In summary, the"A" Steam Generator had seven (7)tubes that were found to have tubesheet crevice indications.

The"B" Steam Generator had Forty one (41)tubesheet crevice indications.

One tube in the"A" Steam Generator had two (2)indications at the third and fourth anti-vibration bar intersections.

These indications are greater than 20/.but less than the repair limit, and have not changed since the 1987 Inspection.

This tube will be reexamined at the next inspection to reconfirm no active fretting wear damage mechanism exists.In light of the fact that only this tube exhibits these indications, AVB fretting wear is not a major concern.PAGE 25 OF 40 l I I 4'5.0 CORRECTIVE ACTIO Table 6 has been generated to identify the tubes with crevice indications or with indications which exceed the repair criteria.This table also shows the location and axial extent of the indication and what corrective action was taken on these tubes.All tubes requiring repair had hot leg tubesheet crevice indications which were identified by an absolute drift signal (ADS)of the tIix-2 Channel and/or quantifiable intergranular stress corrosion cracking (IGSCC)indications by the 400 kHz data.Several squirrel type (SgR)indications, multiple IGSCC, were also identified and have been placed on the list of tubes requiring corrective action.A total of 15 Tubes were plugged in the"A" Steam Generator.

One plug is attributed to a sleeve installed during the 1987 AI80, which met the ultrasonic and visual examination acceptance, but did not show an upper expansion with eddy current and was therefore removed from service.Seven plugs were installed based on the Westinghouse's evaluation of antivibration bar (AVB)support in conjunction with the North Anna Tube Rupture Analysis for Ginna.The"B" Steam Generator required a total of 59 tubes removed from service.One plug is attributed to a sleeve identified during the 1987 AISO as having a very minimal leak most probably at the upper or lower explosive welds.This was discovered during a 750 psi Hydrostatic Pressure Test.Ten plugs were installed based on Westinghouse's evaluation of AVB support data.One of the tubes identified was removed from service for flow peaking considerations due to AVB placement surrounding that tube (Rll C73).Eight other tubes were removed from service to box in previously plugged tubes where AVB support could not be verified.Table 7 and Figures 1,2,3 and 4 goes into further detail on antivibration bar support data.PAGE 26 OF 40

5.0 CORRECTIVE

ACTION (CON')Eight Westinghouse Explosive plugs identified during the hydrostatic pressure test in 1987 as having a very small leak rate were removed and replaced with welded"Top Hat" plugs.Two tubes in 1987 were missplugged on the hot leg Row I Column 58 and Row I Column 48.The cold leg tube ends were correctly plugged.Had either of these tubes degradation gone throughwall 100%, the leakage rate would have been minimal due to their location deep in the tuhesheet crevice.This error is believed to have happened when the computer controlled manipulator tooling encountered the bio-environmental ledge located on the divider plate just below the tubesheet, requiring manual manipulation for plug installation.

Row 1 Column 59 and Row 1 Column 49 were incorrectly plugged in the hot leg.A Ginna Steam Generator Tube Inspection and Corrective Action History has been tabulated.

See Table 8.PAGE 27 OF 40 I 401101 ROLE'UBAN<TH)CVKR i O)oossss aY February 22e I ISO Nl 2'H+>+it+4c WILCOX CO, 114111 Pa9 e Plant~GINNA St m Generator:

A REPORT-TUBES REQUIRING CORRECTIVE ACTION SB RON COL VOLTS DEB IND CHN LOCATION COMMENTS EXTENT TAPE PRB 11 11 li ii 11 ii 11 33 26 27 1 1 14 19 21 27 28 58~51!d.84 Id.'99 1.5!3 8.53 4.91 6.15 2.!d3 96 72 61 21 68 28 13 ADS 84 78 ADS ADS M M 2 M 1 M 1 M 1 M 2 M 2 HTS HTS HTS HTS HTS HTS HTS 1!3.6 13.7 16.9 12.6 15.1 14.6 18.5 PLG SCC PLG IGA PLG SCC PLG SCC PLG SCC PLB IGA PLG ISA Si TSP H Si TSP H Ii TSP H Qi TSP H Oi TSP H 56 TSP H 06 TSP H 4 7 7 74i<f 74!d 74!d 74!d 74!d 74!d 74IA TABLE 6 PAGE 28 OF 40

<<<<>><<<<<<<<0<,C 7<<<<A'<<<T<<<

<VCR Plant-G INNA a,<<><<<<<<<<<<>>

ay February 22708 Ii~!4 A<<<<<<<<<<<<<<tc WILCOX CO.>><<>><<<<<<Steam Generatar-B REPORT: TUBES REQUIRINS CORRECTIVE ACTION SG ROW COL VOLTS DEB IND CHN LOCATION COMMENTS EXTENT PRB 21 2f 21 nf 21 21 21 21 2f 2}21 21 21 21 21 21 21 21 21 21 21 21 21 21 8 38 38 5 14 28 12 3}48 3 8 48 8 34 36 27 41 17 32 1 2 18 28 4 4 f2 14 2<d 1 28 25 2 13 22 31 36 37 38 38 48 41 41 43 45 46 48 48 48 49 49 49 51 51 52 55 55 55 55 58 61 62 64 65 66 72 73 81 82 1.69 g.83 1.52 8.91 8~76 4~96 l.19 8~61'4.48 4.97 2~51 2~82 4~51 8.43 5.82 4.8.66 1.67 5.31 3.64 5.67 8.98 3'7 3 71 2~23 3.62 4.49 2~8'.83 1.'34 3~53 f, g2 4~54 7.67 3.58 2.17 1.58 2.58 112 114 121 77 33 34.74 4'9 183 55 82 47 35 88 73 5v 48 69 44 98 7 43 67 34 34 21" 54 46 47 42 61 48 17 48 76 58 81 68 53 78 SQR ADS SQR ADS ADS ADS ADS 91 ADS ADS 68 74 87 ADS 76 ADS 68 ADS ADS ADS 78 ADS ADB ADB ADS 85 84 ADS ADS ADS ADS 53 91 82 85 M M M M M M M M M M 1 1 1 1 2 1 1 M M M 2 M M M M M M M M M M M 2 1 2 2 2 1 1 1 1 M 2 M 1 M 1 M 1 HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTB HTS HTS HTS HTS HTS HTS HTS HTB HTB HTS HTS HTS HTS HTS HTS HTS HTS HTB HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS 17.1 18.8 17.8 16.1}2.8 13.9 5.8 16.5 16~8 18,8 16.3 15.1 18.4 14.7 17~9 18.3 7.1 17.6 8.3}6.7 16.5 9~8}!i>~9 17.1 11.6 2 14~8 15.2 15~2 13.3 17.3 12.9 9.5 13.9 12~9 6.8 16.5 17~2 15~9 16~7 PLS PLG PLB PLG PLG PLG PLS PLG PLG PLB PLB PLB PLB PLG PLG PLG PLG PLB PLS PLB PLG PLG PLG PLB PLG PLB PLG PLB PLG PLG PLG PLG PLG PLB PLG PLB PLG PLS PLG PLG PLG SCC SCC SCC SCC SCC SCC IBA SCC IGA IBA IGA IGA SCC IBA IGA SCC SCC SCC IGA SCC IGA SCC IBA ISA, IGA SCC IGA IGA IBA IGA SCC SCC SCC IBA IGA IGA IBA SCC SCC SCC SCC¹1 TSP H Ni TSP H¹}TSP H¹1 TSP H¹1 TSP H HTS H¹6 TSP C¹6 TSP H¹1 TSP H¹1 TSP H¹1 TBP H¹1 TSP H¹6 TSP H¹6 TSP H¹6 TSP H¹6 TSP H¹6 TPS H¹6 TSP H¹6 TSP H¹6 TSP H¹6 TBP H¹1 TBP H¹4 TSP H¹6 TSP H¹6 TSP H¹6 TSP H¹6 TSP H N6 TSP H¹6 TSP H N5 TSP H¹6 TSP H¹6 TSP H¹6 TSP H¹6 TSP H¹6 TSP H¹6 TSP H¹6 TSP H¹1 TSP H¹1 TSP H N}TSP H¹1 TSP H 13 13 4.13 13 4 13 4 5 5 5 11 6 6 36 6 6 6 6 11 7 7 7 7 8 18 18 11 11 11 11 743 74g 74!d 728 748 748 72g 74i<f 72g 74'!d 72$72!3 748 72<3 74!d 748 74!d 74!d 748 748 748 72g 74!d 74<3 74<3 74g 74!d 748 748 74!3 74!3 74!d 74<3 74!d 748 748 748 748 74<d 74!d 748 TABLE 6 (con't)PAGE 29 OF 40 "A" STEAM GENERATOR ANTIVIBRATIQN BAR EVALUATION RESULTS ROW CQL 12 12 4 12 5 12 12 7 12 5 iu 6 TYPE OF PLUS INSTALLED HOT LEG COLD LES CE-MECH CE-SENT I NEL CE-MECH CE-SENTINEL CE-MECH CE-SENTINEL CE-MECH CE-SENTINEL CE-MECH CE-SENTINEL CE-t'IECH CE-SENTINEL CE-MECH CE-SENTINEL COt'IMENTS NQ AVB SUPPORT NO AVB SUPPORT NO AVB SUPPORT NO AVB SQPPORT NO AVB SUPPORT NO AVB SUPPORT NO AVB SUPPORT TABLE 7 PAGE 30 OF 40 "B" STEAM GENERATOR ANTIVIBRATION BAR EVALUATION RESULTS ROW COL 4 12 5 12 6 14 15 3 12 87 12 88 12 89 12'P!3 TYPE OF PLUG INSTALLED HOT LEG COLD LEG CE-MECH CE-SENTINEL CE-MECH CE-SENTINEL CE-MECH CE-.SENTINEL CE-MECH CE-SENTINEL CE-MECH CE-SENTINEL CE-MECH CE-SENTINEL CE-MECH CE-SENTINEL CE-MECH CE-SENT INEL CE-MECH CE-SENTINEL CE-MECH CE-SENTINEL COMMENTS NO AVB SUPPORT NO AVB SUPPORT'O AVB SUPPORT NO AVB SOPPQRT NO AVB SUPPORT NQ AVB SUPPORT NQ AVB SUPPORT NO AVB SUPPORT NO AVB SUPPORT NQ AVB SUPPORT 1~~88 14 88 15 88 lh 88 17 88 18 88 ia 89 14 8'7 CE-MECH CE-MECH CE-MECH'CE-MECH CE-MECH CE-MECH CE-MECH CE-MECH CE-SENT INEL CE-SENT I NEL CE-SENT INEL CE-SENT I NEL CE-SENT INEL CE-SENT I NEL CE-SENT INEL CE-SENT I NEL BQX EXISTING PLUG BOX EXISTING PLUG BOX EXISTING PLUG BOX EXISTING PLUG BOX EXISTING PLUG BOX EXISTING PLUG BOX EXISTING PLUG BOX EXISTING PLUG 11 7Z CE-MECH CE-SENT I NEL FLOW PEAKING TABLE 7 (con 0)PAGE 31 OF 40 STEAM GENERATOR"A" TUBES RECEIVING CORRECTIVE ACTION-FEBRUARY$988 PLANT: GDJNA GENERATOR:

A TOTAL TUBES: 3Z60 P~PLUGS (B)L~SENTINEL PLUGS CIL tT)TOTAL TUBES ASSIGNED: i5-45-40 o n C).~C C 55 II.~I C X o LLL L LL-30 A-as CCI cc-20 I I-10 I Cl 55I I I o)I CI~I I I 5)ICI I ICI ICI I CCI I ICI CCI I n CO I I 55 Cll CII el III Ed CK X NOZZLE INLET noh Leg)-Prlmery Fece COLUNNS i'IGURE 1 NANNA'

'H'XIXX.HXXXHA0H'XXH0H.X0X XX$HXP'XX0 0 0 0,X0...X0.~0.0,,X0,X0,:X0.N0A0,X0:,X0.X00::.X0,H0,H0,X0.X0 0.X0,0 0'0 0 0 0'X0: 8 0 5 l5 O 6 6<<6>O 0 1 0 0 0 d 0 0 6 0 0 0 6 5.-" 0 5 0 0 0 0008000005000500

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X0"H0IX0"'X0,'X0" 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 0iO-OIO 0'0'0" OOOO-'OOOOOOOd OOOOOOOQOd 00004600 6 000000400005OOOOOOOOO 0~OOOOOOO 0 K~RX96lKlERElGRESKHGSKREZRKSE%QRCHCNCHCESCH CH CQCH CHEBHRKQKQKHKSEIKH CTILRQILIQSERRSILIIILILLIIILIII LLIL RE REER RRRR-~oo~o~:~-o o o~:~.e'e e'-e-o o-:o~'~o~~-o.o o o o o~~H0:X0-X0.X0,X0XO'XO,X0;Xe.'H0>XO;XO.X0X0HO.X0,X0XOO 0 0 0 0 0 0 0 0 0 0 X0:,X0H0,X0*:X0 X0-~eiX0 X0~X0;X0"X0:-0 0 O 0 0 0 O 0 0 O 0 O 0 0 0 0 O 0 ooooooooooooooeaooooeoooooeooo

'=OOOOOOOQ'-" O~OOOOO~'=-~0009000000 K&QKQRQQQQQQQKQQRQQRQRQQQQEQQKRIIKXQHQQ Q KBLQRRW RQLRQRLRXS80885%%5E5@%55@HK55R L 8 KhRRREERRRREERRRRERRRRRRRERRREEER STEAM GENERATOR"B" TUBES RECEIVING CORRECTIVE ACTION-FEBRUARY 5988 PLANT: GINNA GENERATOR:

B TOTAL TUBES: 3260 P~PLUGS (42)L SENTINEL PLUGS C/L 09)TOTAL TUBES ASSIGNED: 6I-40~--30~Cll Qai Cll C a C.D IC.CI D O CC L iijiQ-25 CII cc-ao I I V-15 10 CI a-5 I CI I ICI I ICI Cll I Cl I ICI I ICI I ICI ICI I CD I CI I ICI C I I O CCI CI OI NOZZLE INLET[Hot Leg)-Primary Face COLUMNS FIGURE 3-NANMAV k~

Qp tg Fp, GlhlNA: 8/G-8 A VB POSIONS~s eu C i iv 12 10 OOI t 0008 0 I I 2 t 2 4 4 2 4 5 4 2 t 4 t 2 2 2 oetmYOOeeOoeOeOO

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08$8SS L1 IS.I 88 87 86 8$84 83 82 81 80'IS 12,2 IA I1.8 I.1 12.1 75 74 73 72 9.7 BAI 11.2 D.7 71 70 68 Bd 67 66$5 64 83 bl A M M IA O 12 10 L1 61 60 59 58 57 56 55 54 53 52 46 47 1.3 48 45 44 43 42 IIX 11.3 I@4 10.2 IIL1 41 40 Sg Sd S7 11 DS 36 35 S4 2 2 2~2 2 2 2 2 2 2 2 2 2 I 2 2 2 4~2 2 2 2 C)OIO101080008010801 2 I 2 Oa*ZOOOOCOOOOOOOOOO 08*OOOSOO 88808808CO00088880800808808888 W IA O z M I-IA ld 12 11 10 2 4 3 4 6 4 2 2 2 2 2 088 601'0'00000000 I 1 8 8 8~0~8 0 0 8 0 0~0 2 4 2 2 4 2 2 2 2 4 2 2 I I OZQB tsQ8@~>>2~*2>>01Oyg0808088 QOOQOQQQOog OQ oooooocoooooeoooooooeoeooooooo Ll 31 30 28 28 27 2S 2524 2$22 21 2D 1018 17 16 15 14 13 12 11 10 8 8 7 II.B%2.1 6 5 4 3 2 1 IS.l 12.12.8 I1 4 Hatea'ejecgcsa ae hosed cn ceseegraet AVB nhlbe tc cadw5ne d Ilbe.~f7 INScssiuns br pajaaian~b hesetxeey dng;su14el is not oeesecLPhgged Tube 9 Oared Tube FIGURE 4 GINA STEAII EBKRATOR TUBE IttSPECTIN AM)CORRECTIVE ACTION HISTORY N.TUBES INSPECIED A B HOT COLD HOT COLD FRIIIARY TO SECOttDARY LEAKAGEi 6Ptl TOTAL TUBES REQUIRING CORRECTIVE ACTIN A B TYPE OF DEGRADATIN

>48X REWIRED REPAIRS A B tt8.TUBES PLU66ED A 8 HO.TUBES SLEEVED A B NO.PLUGGED RETURHED TO SERVICE WITH SLEEVE A B NO.SLE&'ES NO.PMED TOTAL PLUGGED TUBES PLlSGED A B A B A B TOTAL SLEEVED CMIEIIT A B Itt FAC'LORY APRIL 1972 HcKH 1974 HOV.1974 NRCH 1975 JAH.1976 FEB.1976 AFRIL 1976 APRIL 1977 Jm.Y 1977 JAN~1978 APRIL 1978 FEB.1979 DEC.1979 AFRIL 1988 ttOV.1988 AY 1981 FEB.1982 K'1982 APRIL 1983 i%%2 1984 HARCH 1985 FEB.1986 FEB.1987 FEB.1988 1958 3259 516 1781 439 2174 442 8 9 3192 3192 198 9 2883 268 1898 516 672 39 1931 442 53 9 , 3247 3247 1825 75 1525 268 MS 3139 325 3138 325 3138 325 3137 526 3138 382 3137 3137 717 3135 3135 3134 623 3128 8 3122 1517 3182 375 3151 375 3141 488 3148 526 31"9 893 3896 832 3893 963 M87 3987 3883 778 2884 8 2723 IMI 2849 325 1714 375 2849 325 1714 375 8 895 A S/6 8.891 B S/G 9.999 B S/6 8.912 8 S/6 9.86 B S/6 8.887 B S/6 789 8 S/6 I 8 19 2 46 8 39 8 13 9 8 I 8 8 I 9 8 8 I 4 I 34 7 9 9 8 9 11 2 2 15 2 6 8 15 6 13 31 9 4 18 I 4 27 73 41 WASTAGE WASTAGE CRACK IHG/WASTA6E WASTAGE WAST A6E CRAIXIttG ltASTAGE ID CRACKIHG CRNXIttGIW AS TAGE ID CRACKIHG CRACKING/WASTAGE ISA/WASTAGE A'PITTIttG/'8'IGA 16A ISA/WASTAGE IGA/NECH.DAtt 16A IGA/SCC IGA/SX IGA/SCC/WASTAC<

IGA/SCC/WASTAGE 16AISK 16A/SCC I 8 8 8 19 9 2 8 46 11 8 2 39 2 9 15 13 I 9 5 8 8 I 15/IGA 8 6 8 13 I 13 8 2 8 6 8 16 I 28 8 23 8 5 3 78 2 49 17 78 4 18 I 8 9 8 19 8 2 9 46 II 8 2 39 2 8 15 13 I 8 5 8 8 I 15 8 6 9 13 1 34 8 8 8 4 9 18 I 33 8 I I 2 4 9 27 18 72 14 58 8 9 8 8 8 8 8 8 8 8 8 9 8 9 8 8 9 9 8 4 9 2 6 24 9 8 8 8 9 9 9 9 9 8 9 8 9 9 9 9 5 16 9 8 74 9 67 38 88 8 8 9 8 S 2 8 9 8 2 8 9 8 8 8 9 8 8 8 8 8 8 8 8 I 8 8 8 3 9 9 8 3 8 I 8 8 9 I 8 9 9 S 8 8 8 8 8 8 I 8 19 2 46 8 8 13 8 8 I 8 8 I 9 8 9 8 I 2 8 19 15 8 8 8 8 11 2 2 15 5 8 15 6 13 34 8 4 18 4 2 4 24 75 59 8 8 9 9 8 8 9.9 8~8 I 8 5 2 916 3 473 5 8 8 2 67 6 633 7 24 77"I"I 9 178 316 149 386 159 332 36 281 151 335 35 278 TABLE 8 STEAtl GENERATOR TUBE INSPECTI ND CORRECTIVE ACTION HISTORY CON TS FR051 TABLE 8 (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 just 100 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 five (5)tubes with nickel plated-Inconel 600 therma'lly treated sleeves.Three tubes had IGA indications, two others were preventatively sleeved.(3)Sleeved 16 tubes with co-extruded sleeves, 13 with defects with 3 preventatively.

Pulled R21 C46 with a 100 kHz ECT indications, R7 C45 and R28 C45 which were clean.All tubes pulled were from the hot leg.(4)Recovery from the January 25, 1982 Tube Rupture Event included 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 identified in the"B" steam generator with IGA and/or SCC in the crevice were repaired as follows: 41 tubes were sleeved with 36" brazed sleeves 9 tubes were sleeved with 28" brazed sleeves 24 tubes were sleeved with 22" tubesheet sleeves 1 tube and 2 sleeves were plugged I tube R34 C54 was pulled for metallurgical analysis i'/'GE 37 OF 40 t t STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY COMMENTS FROM TABLE 8 (6)The two tubes identified with IGA in the crevice in the"A" steam generator inlet were sleeved with 20" tubesheet sleeves.One indication

)40ÃTWD in the U-bend was permanently plugged.The 70 tubes identified in the"B" steam generator were repaired as follows: 56 tubes were sleeved with 20" tubesheet sleeves 10 tubes were sleeved with 36" brazed sleeves 3 tubes were mechanically plugged (CE removable) 1 tube was explosively plugged 1 tube was sleeved with a 36" brazed sleeve due to the domino effect.(7)The five tubes identified with crevice indications in the"A" steam generator inlet were sleeved with 27" Combustion Engineering Sleeves (CE).One tube identified with general O.D.indication above the secondary side tubesheet was also sleeved with a CE 27" sleeve.The 57 tubes identified in the"B" steam generator were repaired as follows: 27 tubes were sleeved with CE 27" Sleeves 27 tubes were mechanically plugged (CE removable) 3 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.

PAGE 38 OF 40 0 STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY COMMENTS FROM TABLE 8 (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 CE 27" welded sleeves The 153 tubes identified with crevice indications in the"B'team generator inlet were repaired as follows: 72 tubes were mechanically plugged (CE Removable) 80 tubes were sleeved with CE 27" welded sleeves I CE welded sleeve (installed in 1987)was plugged with a CE welded sleeve plug due to rejection of the upper weld.Other repairs required in the"B" steam generator are as follows: 2 BSW test brazed sleeves (installed in 1980)were plugged due to the loss of the primary to secondary pressure boundary as detected by Hydro Test.5 Westinghouse explosive plugs installed prior to 1987 were removed due to leakage and replaced with CE welded plugs.1 CE Mechanical plug on the cold leg was removed and replaced with a CE Mechanical plug 4 CE welded sleeves (installed in 1987), are considered leak limiters due to the marginal acceptance of the upper welds.(9)Fifteen (15)tubes were plugged in the"A" steam generator.

The reasons for repair are as follows: 7 Tubes had tubesheet crevice indications 7 Tubes for no confirmed AVB Support 1 CE Sleeve for unverified upper roll expansion PAGE 39 OF 40 STEAM GENERATOR TUBE INSPECTION-AND CORRECTIVE ACTION HISTORY-COMMENTS FROM TABLE 8 Fifty-nine (59)tubes were plugged in the"B" steam generator.

The reasons for repair are as follows: 41 Tubes had tubesheet crevice indications 8 Tubes to Box existing plugs where AVB support could not be verified.10 Tubes for no confirmed AVB Support 1 Tube for f'low peaking consideration due to AVB placement 1 BN<Tubesheet Sleeve 8 Westinghouse Explosive Plugs were removed and replaced with Welded"Top Hat".Plugs PAGE 40 OF 40