ML17251A983

Summary Exam Rept for 1988 Steam Generator Eddy Current Insp.

ML17251A983
Person / Time
Site:	Ginna
Issue date:	02/29/1988
From:	Curtis A, Henry G ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17251A982	List: ML17251A981 ML17251A983
References
NUDOCS 8803180002
Download: ML17251A983 (45)

Text

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: DATE: cP~

Gary L. Henry, Foreman Materials Engineering and Inspection Services Eddy Current Level III Examiner

/PV8'EVIEWED/

APPROVED BY: DATE:

Albert E. Curtis III, Manager, Materials Engineering and Inspection Services 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 188.8 /

COLD LEG 1517 48 5

~

TOTAL TUBES INSPECTED - FULL LENGTH (F/L) 1244 39.8 /

INTERSECTIONS INSPECTED EXCLUDING F/L HTS 1878 68 ~ /

Ni TSP H 1872 59.

02 TSP H 159 5 8~

13 TSP H 183 3 ~ /

I4 TSP H 183 3 P)

~

0/

55 TSP H 134 4 ~ /

56 TSP H ~

76 8. 8 UBEND 278 8.6 /

N6 TSP C 8. 7 N5 TSP C 183 5. 8 N4 TSP C 183 5. 8 /

e3 TSP C 188 5 ~ 7 /

82 TSP C 181 5 7 Il TSP C 273 8

~

~ 7 /

CTS 273 8 ~ 7 /

SLEEVES INSPECTED 94.8 /

TUBES OUT OF SERVICE TABLE 1 PAGE 3 OF 40

STEAN GENERATOR "B" 1988 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION TOTAL TUBES INSPECTED  : HOT LEG 2723 1!9!i! !if

~

COLD LES 12!81 47 7 ~ /

TOTAL TUBES 'NSPECTED: FULL LENGTH <F/L) 977 35.8 /

INTERSECTIONS INSPECTED EXCLUDINB F/L HTS 17'PZ 65. 8 /

0 1 TSP H 1871 68. 7 02 TSP H ~64 1Z ~ /

TSP H >44 12 6 /

N4 TSP H 745 in 6 /

05 TSP H 361 iu e/

l

~

06 TSF' 5~5 19. 6 UBEND 15 2 ~ /

86 TSP C ~I2& 11 8 /

l

~

N5 TSP C >24 11.8 04 TSP C 424 11.8 /

TSP C 324 11 ~ 8 /

02 TSP C g24 11.8 l CTS TSP C 224

>24 11.8 11.8 l

/

SLEEVES INSPECTED 6.4 TUBES OUT OF SERVICE 276 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 09s50 AM <<<<<<>>>><< <<<<<<<<<<<< Page Plant: I NNA Steam Bene)'atom:

Outage-'BE-88A (2 A QUERY: ALL INDICATIONS 29/ AND GREATER ROM COL OUTAGE INDICATION VOLTS LOCATION INCHES CONl(ENTS REEL 17 7 RGE-SBA OD (general) 21/ TN 1.89 HTS SF -17,29 1 21 7 RGE-BBA OD (general) 22 'I. TN 1.99 AVB2 1)15 24 9 RGE-BBA OD (general) 32 I TW 4.17 H6 t 1.69 CPR 2)15 28 12 RBE-BBA OD (general) 39 / TW 2.87 HTS SF t37.49 2 9 14 RBE-BBA OD SCC 52 X TM 9.84 HTS SF -19.69 SCC)CPR 2s 17 7 17 R6E-BBA OD WASTAGE 22 % TM 9.93 HTS SF t 1.49 NAS 9 17 RBE-BSA OD NSTABE 34 / TW 9.84 HTS SF t 1.89 NS 3)17 6 18 RGE-BBA OD (qeneral) 22 % TN 1.55 HTB SF t44.20 3 7 29 RBE-BBA OD WASTAGE 22 / TN 2.66 HTS SF t 2.69 MAS 3 28 29 RGE-BBA OD (general) 22 / TN 2.76 HTS SF -17.80 9 21 RGE-SBA OD WASTAGE 25 / TW 4.25 HTS SF t 2.49 MAS)CPR 3s17 RBE-BBA OD WASTAGE 25 % TN 4.25 HTS SF t 2.49 WASsCPR 3)17 15 21 RGE-BSA OD MASTAGE 34 % TN 1.38 HTS SF t 2.39 MAS RGE-SSA OD MASTAGE 22 % TN 6.44 HTS SF t 1.79 MAS 17 21 RGE-BBA OD NSTABE 24 % TN 5.24 HTS SF t 1.99 MAS 26 21 RGE-BSA OD SCC 84 / TW 1.59 HTS SF -lb.99 SCC 21 RGE-SBA OD (general) 27 / TW 1.15 HTS SF 4.79 38 21 RGE-BBA OD (general) 27 / TW 1 ~ 43 HTS SF -11.69 RGE-BBA OD (gene) al) 27 '/ TN 1.99 HTS SF -17.89 8 22 RBE-BBA OD WASTAGE 23 % TM 1.47 HTS SF t 1.79 MAS 22 RBE-BBA OD MASTAGE 23 / TW 1.96 HTS SF t 2.N NS 3)17 18 22 RBE-BBA OD WASTAGE 21 / TW 1 ~ 36 HTS SF t 9.39 NS 19 23 RGE-BBA OD WASTAGE 29 '/. TN 3.46 HTS SF t 2.29 NS 3s17 R6E-BBA OD WASTAGE 23 / TN 1 ~ 15 HTS SF + 1 59 MAS 3)17 13 23 RGE-SSA OD NSTABE 26% TW 15.29 HTS SF t 3.19 ~

MAS)<<MAS 14 23 RBE-BBA OD WASTAGE 26 X TN 2.91 HTS SF t 1.89 NAS 33 24 RGE-SSA OD (general) 35 X TW 1.59 Hi ti9.79 14 25 RGE-BBA OD (general) 31 / TW 19.44 HTS SF t 2.79 MAS)CPR 3)19 28 25 RGE-SBA OD (general) 27 / TN 3.39 Hi t 3.29 31 25 RGE-SSA OD (general) 32/ TN 1.89 Hl + 7.39 9 26 RGE-SBA OD (general) 21/ TW 4.53 HTS SF + 1.49 3s 17 21 26 RGE-BBA OD (general) 38% TM 2.97 HTS SF t 2.29 MAS 23 26 RGE-SBA OD (general) 25/ TM 2.93 HTS SF t 1.70 NS 3s19 24 26 RBE-BSA OD (general) 23 / TN 2.93 HTS SF + 1 ~ 39 26 RGE-SBA ID (general) 22/ TW HTS SF

'.66

-11.29 3 17 27 R6E-BBA OD (general) 27/ TW 19. 14 HTS SF t 3.79 RC<-SBA OD (general) 21 / TM 5. 12 HTS SF t 3.99 3 18 27 RGE"BBA OD (general) 26 / TW 11.46 HTS SF t 2.50 23 27 R6c SSA OD (general) 23 / TW 5.15 HTS SF t 2.49 RGE-BBA OD (general) 29 X TW 2.49 HTS SF t 1.20 24 27 RGE-SBA OD (qeneral) 22 % TM 3.63 HTS SF t 1.69 26 27 RBE-BBA OD SCC 72 % TW 9.53 HTS SF -12.69 SCC 25 28 RGE-BSA OD WASTAGE 28 % TW 1.33 HTS SF t 1 ~ 69 NS 4 27 28 RGE-BBA OD SCC 78 % TW 4.91 HTS SF -15.19 SCC 15 29 R6E-SBA OD WASTAGE 33 / TW 1.95 HTS SF t 3.49 MAB 4 23 39 RGE-SBA OD NSTAGE

>> //

22 TN 2.59 HTS SF t 2.19 WAB 4)19 RGE"BBA OD WASTAGE TW 7.90 HTS SF t 1.59 WAS 4s19 24 39 RBE-BBA OD WASTAGE 29/ TW 7.37 HTS SF +1.79 MAS 4)19 23 31 RBE-BSA OD WASTAGE 31/ TW 9.69 HTS SF + 2.49 MAS 4) 19 RBE-SBA OD WASTAGE 24/ TW 7.11 HTS SF t 1 ~ 99 NS 4) 19

'24 31 RBE-BBA OD WASTAGE 24 / TN 8.44 HTS SF + 1.69 NS 4s19 29 32 / 7.68 HTS t NB t 3.19 RGE-BSA OD WASTAGE 29 TW SF 4 22 32 RGE-BSA OD MASTAGE 27  % TM 14 '2 HTS SF t 2.39 MAS RGE-BBA OD WASTAGE 24 / TN 3.75 HTS BF 1.39 MAS 4 23 32 RBE-BBA OD WASTAGE 29 / TW 19.99 HTS SF t 3.59 MAS 21 33 RGE-BBA OD WASTAGE 21/ TW 6.74 HTS SF t 1.89 MAS 4) 19 22 33 RGE-SBA OD WASTAGE 28 / TN 13.57 HTS SF t 2.19 MAS 4s19 23 33 RGE-BBA OD WASTAGE 25 X TN 7.97 HTS SF t 2,49 MAS 4)19 21 34 RGE"SSA OD NSTAGE 23 % TM 6.78 HTS SF t 2.20 MAS 16)19 23 34 R6E-BBA / t

3. 17 HTS t 2.49 OD MABTAGE 26 TN SF NS)<<MAS 4r 19 25 34 RGE-SSA OD WASTAGE 24 '/ TW 11 ~ 14 HTS SF 1.69 MAS,<<MAS 4s19 19 35 RGE-SBA OD NSTABE 23 % TN 5.61 HTS SF + 2.39 <<MAS 4r19 29 35 RGE-SBA . OD WASTAGE 27 / TM 2.92 HTS SF + 2.49 NS 4s19 26 35 R6E-BBA OD WASTAGE 24 / TN 7.92 HTS SF + 1 ~ 39 NS 4)36 22 36 RBE-SSA OD NSTAGE 24 / TM 1.73 HTS SF t 1.69 NS 4)19 26 36 RGE-BBA OD WASTAGE 28 X TW 8.36 HTS SF + 1,49 NS 27 36 RBE-BSA OD WASTAGE 25 X TN 7.63 HTS SF t '91 NS 4)19 TABLE 2 PAGE 6 OF 40

l >>>>>>>>>>>> k4LCs TU})AN<T)$) SVLR 5 }S)>>>>>>>>>>>> HcRl }>>bru>>ry 42y $ 9QQ 49}59 A)$ >>>>>>>>>>>> >>>>>>>>>>>> Page Plant - SINN)-"r am Generator:

Outage- RGE-88A eQ3ERY: ALL INDICATIONS 28/ AND GREATER ROM COL OUTAGE INDICATION VALUE VOLTS LOCATION INCHES COI(ENTS REEL 28 36 RBE-BBA OD WASTAGE 35 / TM 2.56 HTS SF +1 ~ 28 WS)))WAS)CPR 4s19 21 37 RGE-BBA OD WSTAGE 22 / TM 18.28 HTS SF + 1.79 MAS 4)19 22 37 RGE-BBA OD WASTAGE 21 / TW 5.46 HTS SF + 1.88 MAS fb)19 23 37 RGE-BBA OD WASTAGE 25 / TN 2.28 HTS SF + 2.28 MAS 16}36 25 37 RBE-SBA OD WASTAGE 21 / TW 5.78 HTS SF + 2.18 WS 16 26 37 RBE-BBA OD WASTAGE 227, TN 5.32 HTS SF + 1.M aMAS)CPR 4s 19 24 38 RGE-BBA OD WASTAGE 24/ TW 6.15 HTS SF + 1 ~ 58 WS 16 25 38 RGE-BBA GD WASTAGE 23/ TN 5.98 HTS SF + 2.59 MAS 4 27 38 RGE-BBA 09 WASTAGE 28%'N 5.25 HTS SF + 1.78 WS 4 28 38 RGE-BBA 09 NASTAGE 26 / TW 1.35 HTS SF +1 28 ~ NAS 25 39 RGE-BBA OD WASTAGE 26 / TN 2.86 HTS SF + 2.48 MAS)CPR 4)19 26 39 RGE-SBA OD WASTAGE 22 / TM 1.18 HTS SF + 2.28 WSsCPR 4)19 21 48 RBE-BBA OD WASTAGE 22 / TN 6.'64 CTS SF + f 88

~ MAS 14)19 24 48 RBE-BSA OD WASTAGE 24 / TW 1.41 HTS SF, + 1.98 WS) CPR 4)19 26 48 RGE-BSA OD (qeneral) 25 / TN 6.84 Hb + 2.68 WS 4)19 27 48 RGE-BBA OD WASTAGE 23 / TW 8.29 HTS SF + 2.M WAS 4)19 18 41 RBE-881 OD WSTAGE 35 / TN 1.22 HTS SF + 2.29 MAS 4s19 24 41 RGE-BBA OD (Aeneral) 22 % TW 4.11 Hb + 1.78 WS)CPR 4)19 25 41 RGE-BSA OD WASTAGE 22 / TW 19.33 HTS SF + 1.98 ~WAS 4)19 26 41 RGE-SBA OD (qeneral) 38 / TW 7.24 H6 + 2.48 NAS 4)19 RBE-881 OD WASTAGE 38 % TW 2.54 HTS SF + 1.M WS 4)19 28 41 RBE-SSA OD WSTAGE 23 % TW 4.81 HTS SF + 2.59 MAS 4)19 RGE-BBA 09 WSTABE 22 / TN 5.64 HTS SF + 2.88 WS 4)19 29 41 RGE-SBA OD (general) 22 / TN 4.99 H6 + 2.68 WS 4)19 37 41 RGE-BBA OD (Aeneral) 27 / TN - 2.78 H4 -24. 88 4s19 14 42 RGE-BBA OD WASTAGE 22 / TN 1 ~ 86 HTS SF + 8.49 MAS 4)36 26 42 RGE-BBA OD (general) 22 / TN 7.82 HTS SF + 1.89 5s28 29 42 RBE-BBA OD (general) 22 / TN 5.61 HTS SF + 2.88 5)19 18 43 RGE-BBA OD (general) 26 / TW 2. 14 HTS SF + 2.58 5)28 27 43 RGE-SBA GD (general) 28 / TW 4.63 HTS SF + 2.49 WS 5)29 28 43 RGE"BBA OD (general) 22 % TW 9.76 HTS SF + 2.18 MASsCPR 5s28 27 44 RBE-881 OD (general) 22 / TW 2.47 HTS SF + 1.88 WAS 5)28 29 44 RGE-BBA OD (general) 23 % TN 5.52 HTS SF + 1.59 NAS 5)36 RBE-SBA OD (general) 31% TN 8.27 HTS SF + 1.19 WAS 5}36 4 45 RGE-SBA OD (gener al) 32 / TN 3.23 Hf +11.18 5)28 12 45 RGE-SSA OD (general) 25 / TN 5.19 HTS SF + 2.88 5)18 28 45 RGE-BBA OD (general) 36 / TN 5.54 CTS SF -15,M MAS 5)28 21 45 RGE-881 GD (gener al) 27 / TW 8.46 CTS SF -15.58 NAS 5)28 22 45 RBE-BBA OD (general) 39 / TW 9.62 CTS SF -15.49 5s28 27 45 RGE-SBA 09 (general) 26 % TW 8.44 HTS SF + 8.89 WAS 5)29 29 45 RGE"BBA OD (gener al) 23 % TW 4.77 HTS SF + 8.59 WS 5)28 14 46 RGE-BBA OD WASTAGE 22 / TW 1.17 HTS SF + 3.38 WAS)<WAS)CPR 6)21 28 46 RCE-BBA OD (qeneral) 22 / TW 16.98 CTS SF -15.59 MAS)s)MAS 6)21 25 46 RGE-SSA OD WASTAGE 23 / TN 8.24 HTS SF + 1.19 WAS 6)21 26 46 RGE-BBA 09 WASTAGE 28 / TW 5.58 HTS SF + 1.39 WAS 6)21 28 47 RGE-BBA OD (general) 22 / TN 12.41 CTS SF -15.88 AS 6)21 21 47 RGE-BBA OD (general) 22 / TW 17.22 CTS SF -14.98 WAS 6)21 34 47 RGE-BBA GD (general) 25  % TM 5.98 Hb -33.68 b)21 37 47 RGE-SBA OD (general) 25 / TW 3.45 Hi - 8.88 6)21 ii 48 RGE"BBA OD (Aeneral) 21/ TN 2.38 HTS SF -11.29 6s18 26 48 RGE-BBA OD WASTAGE 28/ TW 4 '5 HTS SF + 1.58 WS 6)21 28 48 RGE-SBA OD WASTAGE 21 /TW 12.72 HTS SF + 1.89 WS 6)21 28 49 RGE-BBA OD WASTAGE 21% TN 9.14 HTS SF + 1.88 WS) CHT 6)21 RGE-BSA OD MASTAGE 21% TN 9.59 HTS SF + 8.48 WS) CHT 6)21 36 49 RGE-BBA OD (general) 28% TN 4.23 H4 -f3.69 6)22 24 58 RGE-BBA OD (general) 26  % TN 1.97 HTS SF + f,98 7)22 58 RBE-BSA OD (Aeneral) 27 / TW 2.66 Cb +69.18 7) 22 19 51 RGE-BSA OD WASTAGE 22 / TN 7.48 HTS SF + 1.78 MAS 7s15 16 53 RGE-BSA OD WASTAGE 21  % TW 2.29 HTS SF + 5.28 MAS)CPR 7)25 17 53 RGE-BSA OD MASTAGE 32 / TW 1.42 HTS SF + 3.98 WAS)+WAS 7)25 19 53 RGE-BBA OD WASTAGE 26 / TW 2.24 HTS SF + 2.88 WS 7)25 RGE"BSA OD WASTAGE 27 / TW 2.83 HTS SF + 1.59

- WS 7) 25 38 53 RGE-BSA OD (qeneral) 21 / TN 2.7f HTS SF 8.18 7s25 18 54 RGE-BBA GD WASTAGE 23 / TN 2.61 HTS SF + 2.98 WAS)CPR 8)25 17 55 RGE-BBA 09 WSTAGE 34  % TW 8.95 HTS SF + 4.28 WAS)XMAS 8}25 28 58 RGE-BBA 09 (qeneral) 35  % TW 9.97 HTS SF + 2.98 WS 15s26 24 58 RGE-BSA GD WASTAGE 27 / TN 1.62 HTS SF WAS 9s 26 TABLE 2 (con't)

PAGE 7 OF 40

>>>><<<<>>>>" PP Ki TUS)AM)PS )VER, 5, s)S)>>>><<<<>>>> Mon C<<bru<<ry 22'9SS fS)SS AM <<<<>><<<<<< <<<<<<<<<<>> Pa ge s

Plant - GINN)-") am Gener ate)r - A Outage: RGE-SSA

~QUERY: ALL INDICATIONS 28X AND GREATER ROW COL OUTAGE INDICATION VALUE VOLTS LOCATION INCHES CO)STS REEL 17 59 RGE-88A OD WASTAGE 21/ TM 3.91 HTS SF + 2.18 MAS 9) 26 24 59 RGE-88A OD WASTAGE 23 X TM 2.39 HTS SF + 1.19 MAS 9) 26 28 68 RGE-88A OD WASTAGE 33 / TW 1.61 HTS SF + 1.38 MAS 9) 27 13 61 RBE-88A OD WASTAGE 35 X TM 3.77 HTS SF + 1.59 MAS 15) 27 14 61 RGE-88A OD WASTAGE 28 / TW 6.39 HTS SF + 2.28 MAS 9)27 15 61 RGE-88A OD WASTAGE 25 / TW 6.12 HTS SF + 2.58 MASsCHT 9)27 1'9 61 RGE-88A OD WASTAGE 22 / TN 4.62 HTS SF + 1.49 MAS 9)27 28 61 RGE-88A OD WASTAGE 33 X TW 3.81 HTS SF + 1,79 MAS 9s27 19 64 RGE-88A OD WASTAGE 22 / TN 9.58 HTS SF + 1 ~ 49 MAS 18)28 28 64 RGE-88A OD WASTAGE 22 X TN 1 ~ 12 HTS SF + 1.98 WAS 18)28 15 65 RGE-88A OD WASTAGE 28 X TN 5.57 HTS SF + 1.58 NAS 18s28 16 68 RGE-88A OD (qeneral) 27 / TW 16.77 CTS SF -12.19 NAS 12)29 9 69 RGE-88A 22 2.84 HTS + 1.29 14 69 RGE-88A 78 RGE-88A OD WASTAGE OD WASTAGE 35 X TW

/ TW 21 / TN 9.88 HTS SF SF i 2.38

+ 8.68 NAS NAS 12)18 12.

6 OD WASTAGE 3.21 HTS SF NAS 12 9 78 RGE-88A OD WASTAGE 25/ TW 4.81 HTS SF + 1.89 NAS 12)18 6 71 RGF=88A OD MASTAGE 21 / TW 7.54 HTS SF + 8.69 NAS 12 12 71 RGE-88A OD WASTAGE 29/ TN 1.13 HTS SF + 1.69 MAS)CPR 12) 18 8 73 RGE-88A OD WASTAGE 23/ TW 1.68 HTS SF + 8.98 MAS 12 8 74 RGE-88A OD WASTAGE 21XTW 4.33 HTS SF + 1.19 NAS 12 74 RGE-88A OD WASTAGE 22/ TN 2.84 HTS SF + 1 ~ 89 NAS 12)18 RBE-88A OD WASTAGE 24/ TM 7.72 HTS SF + 1.28 WAS 12)18 82 RGE-88A OD (general) 25/ TW 2.46 HTS SF + 4.38 13 16 87 RBE-88A OD (general) 36 / TN 9.65 HTS SF +11.98 16 TOTAL TUBES FOUND 143 TOTAL INDICATIONS FOUND 158 TOTAL TUBES IN INPUT FILE = 3268 TOTAL TUBES It(SPECTED = 3124 TABLE 2 (con't)

PAGE 8 OF 40

I

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'@JULY: AL'L INDICATIOi(S 28% TM AND GREATER ROM COL OUTAGE INDICATION VALUE VOLTS LOCATION INCHES COMMENTS 18 6 RGE-SBB OD (general) 38 X TW 1.72 C2 is28 RGE-SSB OD (qeneral) 39/ TN 2.36 Cl 1) 20 8 13 RGE-SBB OD SCC 81% TW 1.69 HTS SF -17.18 SCC 2 7 16 RGE-88B OD WASTAGE 28 % TM 8.99 HTS SF + 1.18 MAS 2 9 16 RGE-SBB OD WASTAGE 28 / TW 8.95 HTS SF + 8.98 WAS 2) f7 9 18 RGE-88B OD (geneval) 28 / TW 6.92 HTS SF + 1.38 CPR 21 17 9 19 RGE-SBB OD (general) 28 X TW 9.16 HTS SF + 1.78 MAS 2s 1/

19 RGE-SSB OD (general) 28 / TW 12.23 HTS SF + 1.58 2) 16 28 RGE"SBB OD (gener al) 21 / TW 8.88 HTS SF + f.58 MAS 2) 17 9 21 RGE-88B OD (general) 24 / TM 18.48 HTS SF + 1.78 2)17 11 21 RGE-SSB OD (general) 28 / TW 9.21 HTS SF + 1.58 MAS 2s16 18 22 RGE-SSB OD (geneval) 28 / TN 5.86 HTS SF + 1 ~ 28 2)17 11 22 RGE-SSB OD (qeneral) 24 / TW 5.59 HTS SF + 1 ~ 68 <<MAS 2s16 38 22 RGE-BSB OD SCC 68 / TW 8.83 HTS SF -18.88 SCC 2 11 23 RGE-88B OD (general) 22 / TW 7.72 HTS SF + 2.88 MAS 3) 16 13 23 RGE-88B OD (general) 21/ TW 6.78 HTS SF + 1 ~ 28 22 23 RGE-SSB OD (general) 25% TW 2.89 HTS SF + 1.68 3 18 24 RGE-BBB OD (general) 21/ TN 8.27 HTS SF " 1 ~ 38 3)17 13 24 RGE-88B OD (general) 22/ TW 8.63 HTS SF - 1 ~ 38 17 24 RGE-8SB OD (gener al) 28/ TW 5.97 HTS SF - 1.68 3 18 24 RGE-SSB OD (general) 28 / TM 6.99 HTS SF - 1.28 28 24 RGE-BBB OD (geneval) 21/ TW 6.55 HTS SF - 1.58 17 25 RGE-SBB OD (general) 28/ TW 9.59 HTS SF - 1.78 24 25 RGE-88B OD (general) 22% TW 6.92 HTS SF - 1.38 3 16 26 RGE-SSB OD WASTAGE 28/ TW 8.83 HTS SF + 1 ~ 58 MAS 26 31% 9.96 +

- 1.40 17 RGE-SBB OD WASTAGE TN HTS SF WAS 3 19 26 RGE-SBB OD (general) 33 % TN 11.21 HTS SF 1.28 28 26 RGE-SSB OD (general) 28 / TW 6.18 HTS SF 78 1

- 1.68

~

24 26 RGE-88B OD (general) 28 / TN 18.23 HTS SF 3 24 27 RGE-SSB OD WASTAGE 28 / TN 11.84 HTS SF + 1.28 MAS 3 24 38 RGE"SSB OD WASTAGE 21% TW 9. 16 HTS SF + 1 88

~ MAS 3 38 31 RGE"SBB OD SCC 28 / TW 1 ~ 52 HTS SF -17.88 SCC 24 32 RGE-88B OD WASTAGE 37 X TM 1.53 HTS SF + 1.88 MAS 5 33 RGE-SSB OD SCC 53 X TW 8.91 HTS SF -lb.18 13 14 33 RGE-SBB OD SCC 78 / TW 8.76 HTS SF -12.88 SCC 45 39 RGE-88B OD (qeneral) 24 / TN 1.59 HTS SF +41.58 4 48 48 RGE-SSB OD SCC 91/ TW 4 ~ 51 HTS SF -18.48 SCC 4f RGE-888 OD WASTAGE 26 / TN 6.28 HTS SF + 8.50 MAS 13) 32 23 41 RGE-888 OD (general) 22 / TW 4.76 HTS SF + 1 ~ 88 4) 28 24 4f RGE SSB OD (general) 22 / TN 4.58 HTS SF + 1 ~ 68 4) 28 RCE-88B OD (qeneraf) 34 % TM 3.24 HTS SF + 1 ~ 28 4) 28 6 42 RGE-BSB OD WASTAGE 22 / TM 4.32 HTS SF + 8.78 MAS 13) 32 36 43 RGE-SSB OD SCC 68 / TW 4.25 HTS SF -18.38 SCC 5 4 45 RGE-SSB OD WASTAGE 23 / TN 1.75 HTS SF + 8.58 MAS 5) 33 9 45 RGE-SSB OD WASTAGE 28 / TW 4 ~ 91 CTS SF + 1.78

- MAS)<<MAS 5) 17 27 45 RGE-SBB OD SCC 74 / TW 8.66 HTS SF 7.10 MAS,SCC 5 15 46 RGE-SBB OD WASTAGE 21% TW 9.25 CTS SF + 1 ~ 70 MAS 21)26 28 46 RGE-SSB OD WASTAGE 35 / TW 1 ~ 18 HTS SF + 3.58 MAS)CPR 5) 21 41 46 RGE-SSB OD cCC 87 % TW 1 ~ 67 HTS SF -f7.68 SCC 5 17 48 RGE-88B OD SCC 76 % TM 3.64 HTS cF -13.28 SCC 6 49 RGE-SSB OD SCC 68 / TN 8.98 HTS'SF "lb.58 SCC 22'l 33 13 58 RGE-SBB 'OD WASTAGE 28 X TM 6.47 CTS SF + 1.68 MAS 6)23 25 58 RGE-BSB OD WASTAGE 29 / TW 3.25 HTS SF + 3.28 MAS 6)23 6 51 RGE-BSB OD WASTAGE 28 / TW 2.66 CTS SF + 1.68 MAS 6)23 8 51 RGE-SBB OD MASTAGE 26 / TW 11.39 CTS SF + 2.10 MAS 6)23 13 51 RGE-BBB OD WASTAGE 28 / TM 4.97 CTS SF + 1.68 MAS 6)23 28 51 RGE"88B OD SCC 78 / TW 3.62 HTS SF -11.68 SCC 6 8 52 RGE-BBB OD WASTAGE 25 X TM 8. 11 CTS SF + F 88 MAS 7) 24 28 55 RGE-88B OD SCC 85 % TM 1.34 HTS SF -13.38 MAS)SCC 7 22 56 RGE-BBB OD WASTAGE 22 / TM 2.78 CTS SF + 1 ~ 68 MAS 7s29 38 56 RGE-SSB OD (qeneral) 37 X TN 1.87 HTS SF + 2.58 MAS 7)27 1 58 RGE-SBB OD SCC 91 / TN 3.99 HTS SF -17.38 SCC) HISS PLUGS D 1-59 (HL) 8)11 RGE-SBB OD SCC 53/ TN 1 ~ 64 HTS SF -lb.88 SCC) HISS PLUGGED 1-59 (HL) 8)11 RGE-BSB OD SCC 75 /~ TM 2.85 HTS SF "17.48 SCCs HISS PLUGGED 1 59 (HL) 8)11 RGE-88B OD SCC 97 % TN 1,39 HTS SF -17.98 SCC) HISS PLUGGED 1-59 (KL) 8)11 2 61 RGE-SSB OD SCC 84 / TM 3.53 HTS SF -12.98 SCC 9 62 RGE"SSB OD (gener al) 25 / TW 16.78 CTS SF - 9.68 CPR)MAS 25)33 TABLE 2 (con't)

,PAGE 9 OF 40

i osaar ~

R0),K i

T))BAN<TS)) {VCR, 5,0) eseoso S)o Fsbruary 22'980 11)50 A)S iisosso oeasao Page Plant- (5INNA SWam Generator - B Outage- RGE-88B

'UERY: AlJ INDICATIONS 28/ TM AND GREATER ROM COL OUTAGE INDICATION VALUE VOLTS LOCATION INCHES CON)(ENTS 28 62 RGE-88B OD MASTAGE 22/ TM 4.68 HTS SF + 1 58

~ MAS IGA 9 22 63 RGE-88B OD MASTAGE 28/ TM 18.51 HTS SF + 2.88 MASsCPR 9) 38 28 63 RGE-88B OD WASTAGE 23% TM 4.95 HTS SF + 1.78 MAS)CPR 9 38 36 63 RGE-88B OD (qeneral) 25% TM 3.61 HTS-Hl- +19.89 NSY 6,39 26 64 RGE-88B OD MASTAGE 28 / TM 5.39 HTS SF + 2.68 MAS 9s31 4 67 RGE-88B OD MASTAGE 21/ TM 1 ~ 53 CTS SF + 2.28 MAS 25)33 6 68 RGE-88B OD MASTAGE 25/ TM 2. 12 CTS SF + 1 ~ 98 MAS 18)25 2 72 RGE-88B OD SCC 53/ TM 3.58 HTS SF -lb.58 SCC 11 2 73 RGE-88B OD SCC 91% TM 2.17 HTS SF -17.28 SCC 11 26 79 RGE-88B OD (qeneral) 25/ TM 4.39 HTS-Hl +11.18 15

'9 81 RGE-88B OD SCC 82 % TM 1.58 HTS SF -15.98 SCCs IGA 11)12 2 82 RGE-88B OD SCC 85 % TM 2.58 HTS SF -lb.78 SCC 11 TOTAL TUBES FOWi D 74 TOTAL INDICATIOiNS FOUND 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 40Ã IGA.

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. HTS PF 2 HTS HID

~ 28 g g 2rjj 8 8 1 58 g

3>> HTS SF 158 176 3} 377 4 HTS-Hi

~ 15 8 24

5. Hi 58 83 73 258

6. Hi-H2 7 6 5 27

7. H2

8. H2-H3 11 6 lg 36 rij ig g H3 8 1 1 1 fij. H3-H4 8 g 1 g 1

11. H4 8 g 1 rg 1 1 2'. H4-H5 1 1 g 8

13. H5 7 8 12

14. H5-H6 6 1 8 rjj 7 15 16.

~ H6

>H6 6

7 16 g

7}

6 i}7 2g

17. ?rg AVB} g 8 8 ref

18. >AVB} 1 fij rg 8 1

}'P. AVB2 g r3 g g tg 28 ~ >AVB2 Qj !8 8 re 2}, >AVB3 g g g 8 22 ~ AVB3 g re g

23. >AVB4 g qj 1 AVB4 g g 8 g g 25 ~ >C6 5 2 7 23 26 ~ C6 8 13 56 27 ~ C6-CS g 8 g 1 28 ~ C5 6 4 6 }9 C5-C4 8 7

38. C4 14 6 26

31. C4-C3 8 8 8 g 8 32 C3

~ 8 5 6 22 C3-C2 1 1 g g 2 34 ~ C2 6 15 5  ?

35 ~ C.-C} g g

36. Cl 16 3 24, 37 ~ Ci-CTS 8 fjj g

38. CTS SF 74 'p 8 g 83 3'P. CTS MID g g fg 48 ~ CTS PF g 8 8 g 8 4}. OTHER g 8 8 8 8 TOTALS 414 448 }68 238 1268 PERCENT: 3 ~

~ 6 35m 3 18. S TABLE 3 PAGE 13 OF 40

~

Plant- GINNA Steam Generator: B

,Outage-'GE-88B DENT VOLTS LOCATION <18.88 18.88-1 28.88-2 >29.99 TOTAL

1. HTS PF g g 8 g Cg 4 ~ HTS HID 58 14 8 184 HTS SF 131 127 34 21 313 4 HTS-Hl

~ 8 g 28 5 Hi

~ 6 5 14 28 6 ~ Hi-H2 7; H2 8 rlf 1 2 8 ~ H2-H3 8 g 1 9 Ha

~ 1 g 8 18 ~ H3-H4 g g g 8

11. H4 1 4 2 12 H4-H5 8 8 g 2

13. H5 1 ftf 6

14. H5-H6 12 3 16

15. H6 8 2 5 17

16. >H6 18 13 g 17 ~ AVB1 8 lCf 8 8

18. >AVB1 8 8 g 1

19. AVB. 8 8 g 2g, >AVB2 4 1 8 1 6

>AVB3 g g g Cif g 2 ~ AVB3 g g g rif 8

>AVB4 !if g 8 8

24. AVB4 8 g g 8 g 25 ~ >C6 19 6 8 27

26. C6 13 7 27.

nS C6-C5 8 g 8 C5 8 Cg 8 8 8 29 ~ C5-C4 1 C<.i g 8 1

38. C4 8 g 1 8 31 C4-C3 g 8 g 1

~

32. C3 g 1 1 2. 4 C3-C2 1 !if 8

34. C2 3 1 2 C2-Cl 8 g

36. Cl 1 2 g 2 M7 Ci-CTS 2 8 g 38 CTS SF

~ 285 35 /if 24g

39. CTS HID 19 g Clf 21

48. CTS PF 1 g 2

41. OTHER 8 g g 8 !if TOTALS 538 263 78 84 PERCENT- 55.5 27.5 8 2

~ 8.8 TABLE 3 (con't)

PAGE 14 OF 40

t . P,lant- GINNA Steam Generator:

Outage: RGE-88A LOCATION SPECIAL '28 OD WASTAGE TW 28-39 48-49 )49 TOTAL

i. HTS PF HTS HID 8

!if 8 g 8

g 8 8 3 ~ HTS SF g i>i g 8 8 4 ~ HTS-Hi 8 7 ref '95 g 8 798

5. Hl g 8 g g g 8

6. Hl-H2 g 1 g g g

7. H2 8 8 !8 !8 g 8 8 ~ H2-H3 8 g g 8 H3 8 g 8 g 8 18 ~ H3-H4 g !ij 8 fjf g g

11. H4 8 8 8 g 8 12 ~ H4-H5 g g g g g g

-H5 8 8 8 8 8 8

14. H5-H6 g g 8 g g 8 15 ~ H6 g g 8 g 8 8 16 ~ >H6 g 8 tif !if g g

17. AVBi !3 8 8 8 8 8 18 ~ >AVBi 8 g 8 8 8 g

19. AVB2 8 g g g g g 28 ~ )AVB2 g 8 g g rij !ij

>AVB3 g 8 g 8 8 g

~ >> ~ AVB3 !ij !if g 8 8 g

>AVB4 g g g 8 !if g 24 AVB4 g rgj g g g g

25. >C6 8 g rg 8 g

26. C6 g g g g g 8 27 ~ C6-C5 g 8 8 8 8 8 28 ~ C5 g 8 8 ref 8 g C5-C4 8 g 8 g 8

38. C4 g 8 g !if g g

31. C4-C3 g 8 g g 8 8

&2 C3~ g 8 8 g g g 33 C3-C2

~ 8 g 8 tif fg g

34. C2 g g g g 8 !ij 35 C -Ci

~ ~

g 1 g 8 g 1

36. Ci !if g g !ij fjf g 37 Cl-CTS

~ 8 !if g 76

38. CTS SF 8 g g g CTS HID !if g 8 g 1

48. CTS PF !if g 8 tg g 8

41. OTHER tij 8 g 'rg 8 g TOTALS 8 784 96 8 8 PERCENT- 8 8

~ 89 1

~ lg. 9 8.8 8.8 TABLE 4 PAGE 15 OF 40

>>>>>>>>>>>> RQ1K TUt!AN(Ttt) !VCR 5 ttl)>>>>>>>>>>>> Monday F>>bruary 22t tCIQQ 12ttth PH>>>>*>>>>>> >>>>>>>>>>>> Page Plant: SINNA am Generator- A Outage- RGE-88A OD SCC / Tfrf LOCATION SQR <28 28-39 48-49 >49 TOTAL

i. HTS PF

2. HTS MID g g g

!if g

td. g g r~$ 8 4 3 HTS SF

~  !)i iH6 8 g g 8 g 8 17 AVBl

~ g g g g 8 8

18. >AVB1 8 g 8 cd g 8

19. AVB2 g !if 8 !d !if 2g >AVB2 g g g 8 g g 21, >AVBZ rif g !d 8 8 g

~ a ~ AVBZ 8 g 8 8 g !3 2~ ~ >AVB4 g tif !if 8 !if 24 ~ AVB4 8 8 8 8 id 25 ~ >C6 g 8 g g 8 8 C6 g cd g 8 8 8 27 ~ C6-C5 8 8 rd 8 8 8 28 ~ C5 g 8 8 g 8 g 29'. C5-C4 tgf g g g g 8

38. C4 8 g td 8 g g wi. C4-C3 g g g 8 g C~ !if g g g g 8 ZJ CZ-C2

~ g ig g g !if a4 C2

~ g 8 rif g g

~5 C2-Cl

~ g 8 !if g g

36. Cl g td g g g g D7 Ci-CTS

~ !if !if !if g g

'38. CTS SF 8 8 g 8 cd CTS MID g ri! rtf g g 48 ~ CTS PF 8 8 8 g g

41. OTHER g 8 g id TOTALS g g g rd PERCENT- rd. g cg ~ cd 8.8 8 8

~ lgg. 8 TABLE 4 (con't)

PAGE 16 OF 40

, Plant: GINNA S'team Generator: A

, Ocitage. RGE-SBA OD IGA / TN LOCATION ADS $ 28 28-Q9 4!8-49 >49 TOTAL

1. PF rg 8 g g 8

2. HTS HID fi! g 8 g HTS SF !i! !i> g 8 g lg HTS-H1 8 g 8 8 g 8

5. Hl 8 g g 8 g 8

6. Hi-H2 8 g 8 8 8 8

7. H2 8 8 8 g 8 8

8. H2-HZ 8 g 8 rg 8 g 9 Ha

~ 8 g 8 fg g 8

18. Hi-H4 8 g 8 8 8 11 H4 g 8 8 8 g 8 12 ~ 'H4-H5 g 8 8 8 8 g H5 g g 8 8 8 g 1.4 'TS

~

15. H6 H5-H6 8 g

8 g

8 8 ~

8 g

8 g

8 8

16 ~ )H6 8 lj gf r3 8 8

17. AVB1 8 r3 g 8 g 8 1.8 ~ )AVB1 8 ri! 8 g g 8

19. AVB2 8 8 8 g 8 8

28. >AVB= !i! 8 g g 8 8 21'2 >AVBZ 8 g 8 g 8 8

~ AVBZ 8 8 8 8 8 8 22e >AVB4 8 8 g g 8 g 24 AVB4 8 8 g 8 8 g

25. >C6 g 8 8 g 8 8 C6 g 8 g 8 8 27 C6-C5 8 lg g g 8

28. C5 g 8 g g 8 29 C5-C4

~ r3 g 8 8 8

38. C4 !i! g g 8 8 g ai.

~2 C4-C~ g g g g g g

~ C3 8 g g g 8 g C~~-C2 g g 8 rg !8 g i4.

Z5 C2 C2-C1 8 8 8 8 8

~ g g g 8 g 8

~6. Ci ri! 8 8 g g 8 27- C1-CTS g 8 g r3 g g

38. CTS SF 8 g 8 g 8 8 u9. CTS HID g g g r3 8 4g, CTS PF 8 g !i! 8 41 OTHER 8 8 g 8 g TOTALS g g g PERCENT- igg. 8 8.8 8 8

~ 8 8

~

TABLE 4 (con't)

PAGE 17 OF 40

~

P,l an

,Outage-"

t: G INNA RGE-88A OD ( eneval) / TW LOCATION <28 2g-Zq 48-4q >49 TOTAL HTS PF g rd g 8 8 8 HTS MID 8 1 7 g 8 8 HTS SF 8 8 g !if 8 8 4 ~ HTS-Hi g 5 8 8 34 5 ~ Hi g g 8 8 8 g

6. Hi-H2 8 1 4 8 8 5

7. H2 g 8 g g 8

8. H2-H3 8 g 8 8 8 8

'p. H3 g 8 8 8 rg 8

18. H3-H4 8 8 2 g 8 2

11. H4 g g 8 8 !3 8

12. H4-H5 8 ~

g 8 g g 8

13. H5 8 8 8 8 8 !ij 14 H5-H6 8 g 1 8 8

'5.

H6 fjf 8 8 8 g 8

16. >H6 8 5 8 8 8 17 AVB1 g 8 g g 8 g

'8.

>AVB1 g g g g g 1'p. AVB2 !iS g g g 1 2g, >AVB2 g g 8 8 8 g 21 ~ >AVBZ g g g 8 8 22 ~ AVB> 8 1 8 8 8 1

>AVB4 g g !if !if r~j 8

24. AVB4 g !ij !ij 8 g g 25 ~ >C6 g g g g 1 26 ~ C6 g 8 g g g 8 C6-C5 8 8 rd g C5 8 !3 8 ,8 8 8 2'7 ~ C5-C4 zrf 8 r '8 g 8 28 ~ C4 8 8 !ig 8 g g C4-Ce C~

8 !if 8 8 8 g g g 8 g 8 g CZ-C2 g !if 8 g 8 g 34 C2 1 !if g g g i5.

36

~

C2-Cl Cl 8 8 8 g g 8

~ 8 8 8 g 8 8

~7 ~ Ci-CTS 8 1 8 g 1 a8. CTS SF 8 g 8 g g 8

~9. CTS MID g 7 g g 1PS 4g, CTS PF !if g g g g !if

41. OTHER 8 g g !ij g 8 TOTALS 1 15 57 !if 8 7&

PERCENT: 1.4 2 cgf 5

~ 78. 1 8.8 g,g TABLE 4 (con't)

PAGE 18 OF 40

,:,Ou'tape:

Plant- GINNA RGE-88B OD TW LOCATION SPECIAL <2!i! 2!d-3'P 4!d-4'7 >49 TOTAL

i. HTS PF HTS MID 8

g 8

f!i!

g 8

g 8

g 8 18 rg 3 ~ HTS SF g g 8 ' g g g 4, HTS-Hi 8 .31 16 g 247

5. Hi g g 8 rg ri! 8 6 Hf -H2

~ 8 g g 8 7 H2

~ 8 g 8 8 !i! 8

8. H2-H3 8 8 g 8 8 8 H3 g g !iS rg g g

18. H3-H4 g 8 g g 8 8

11. H4 g 8 8 g 8 8

12. H4-H5 8 8 8 g g 8

13. H5 g 8 g 8 g !i!

14 ~ H5-H6 !jf 8 8 8 8 g f5. H6 8 8 g 8 g 8 16 ~ >H6 8 8 g 8 g

17. AVB1 g 8 8 8 g g

18. >AVBi g 8 g g g'8 8 1'P ~ AVB2 8 g 8 g g

28. >AVB2 8 8 8 g g 8 2f. >AVB3 g 8 g 8 8 8

~ ~ AVB3 8 g g 8 8 8

>AVB4 rg 8 ig g g g

24. AVB4 g g g g 8 8 25 ~ >C6 8 8 8 g rj!

26 ~ C6 8 g g g 8 8 C6-C5 8 !i~ ri! g 8 g 28 ~ C5 8 g g 8 8 g 2'P. C5-C4 g g 8 g 8 8

38. C4 8 g g 8 8 g

31. C4-C3 g g g 8 g 8 C3 8 !i! 8 g 8 g C3-C2 g 8 8 8 g g

34. C2 8 g 8 8 8 8 35 C2-Ci

~ 8 1 g rg g 1 36 Ci

~ 8 8 g g g 8 D7 C1-CTS 38.

~ g 167 ig g 177 CTS SF 8 1 g 8 8 1 CTS MID g g g 8 g g

48. CTS PF 8 8 g 8 g 8

41. OTHER 8 8 g 8 g g TOTALS g 413 26 g g PERCENT- g g

~ 94. 1 5.9 8.8 8,8 TABLE 4 (con't)

PAGE 19 OF 40

<<>>*>>>>>> MLr. TURAN!TM) rVLR. 5.S)>>>>>>>>>>>> Mrrnd<<y C>>brush y 22r lORQ 12<04 PM >>>>>>>>>>>> >><<>>>>>>>> I a) e Plant G INNA m Generator: B Outa8e: RGE-SBB OD SCC LOCATION SG}R < .8 2!if-39 4!if-O'P >49 TOTAL 2

i. HTS PF HTS NID 2 8 fg 8

g Cif g 8

~ 1 g 24 HTS SF 8 g g ref 8 g HTS-Hi 8 8 g !if g g

5. Hi 8 g 8 g 8 8

6. Hl-H2 8 !if g g 8 8

7. H2 8 8 g g 8 8

8. H2-H3 rif 8 g 8 8 8 H3 g g 8 g rif 8

18. H3-H4 rif 8 g 8 !if g

11. H4 rif 8 8 8 8 lz.

13m HS H4-H5 g 8

8 8

Cif g

rif 8

g 8 8

14. H5-H6 g 8 g 8 8 g

15. H6 8 8 g g g !3 16 >H6

~ g 8 8 g 8 8

17. AVB1 8 g 8 g g 18 ~ >AVBi rlf 8 8 rif 8 8 1'P . AVB2 !if g rlf Cif 8 8 28 ~ >AVB2 8 8 g 8 !if 21 ~ >AVB3 g 8 8 8 8 22 AVB3

~ 8 8 8 8 8 g

>AVB4 8 8 8 g 8 AVB4 g g g g 25 >C6

~ 8 8 8 8 8 26 ~ C6 8 8 g g 8 8 27 ~ C6-C5 g g g 8 g 8

28. C5 !if 8 8 8 rlf g C5-C4 8 g g rif g 8 3 Vlf C4 g g g g 8 31 C4-C3

~ g g g g 8 32 C3~ g g g g g g 33 C3-C2

~ g 8 g rlf 8

34. 8 g g g g

35. C2-Ci g g g g g

36. Ci 8 g 8 g g

37. Ci-CTS 8 8 g g g

38. CTS SF 8 !if rif 8 g g CTS MID 8 g g rif !if 8 4!if, CTS PF g 8 g !if g

41. OTHER 8 rif g g !if TOTALS 2 g 1 21 PERCENTS 8 3

~ rif. rlf 4.2 g.r 87. 5 TABLE 4 (con't)

PAGE 20 OF 40

. Plant: GINNA B

!QUA'age: RGE-88B OD I GA  % TN LOCATION ADS <28 28-39 >49 TOTAL 1 ~ HTS PF 8 k! 8 8 g

~ ~ HTS MID 24 8 g g 8 24 3a HTS SF gj 8 8 8 8 g 4 ~ HTS-Hi g 0! 8 8 8 8

5. H1 g <3 g 8 !i! g

6. Hi-H2 g 8 8 8 8 8 7 ~ H2 g g rg g g 8 8 ~ H2-H3 !i! 8 8 g g 8 H3 r<.! g 8 , g !i! g 18 H3-H4

~ 8 8 8 g 8 8

11. H4 8 g 8 g g g H4-H5 8 8 8 8 8 g

13. H5 g 8 g g graf 8 g

14. H5-H6 8 g g 8 8 8

15. H6 g g g rg g g

16. >H6 8 8 8 <3 8 8 17 AVB1

~ 8 8 8 g 8 g

18. >AVBa 8 8 8 8 8 8

19. AVB2 g 8 8 g g g 2g, >AVB2 g g 8 8 8 21 >AVB3 8 8 g g 8 8

' AVB3

'2 g 8 8 8 8 g De >AVB4 g 8 g 8 8 8 24 AVB4 8 g 8 8 8

25. >C6 8 g 8 g 8

26. C6 8 g g g g 8

27. C6-C5 g ig 8 ri! g g 28 C5 8 g g g 8 8 C5-C4 g g g rg rg

38. C4 g 8 8 8 g 3a. C4-C3 8 8 g g g g OA ~ C3 8 8 8 8 g 8 C3-C2 g rg 8 <3 8 8

34. C2 g 8 g g g 8

'735.

36 38.

~

~

C2-C1 C1 Ci-CTS CTS SF

!i!

8 g

!i!

g 8

8

<i!

8

!i!

8 8

g 8

g 8

g g

8 g

g g

39 ~ CTS MID g 8 g !if 8 <jf 4g, CTS PF 8 8 <3 g 8 8

41. OTHER g 8 g 8 g g TOTALS 24 8 g g PERCENTS 188 ~ !i! 8.8 g, g 8 8

~ 8.8 TABLE 4 (con't)

PAGE 21 OF 40

'lant-.

'Outage-BINNA RGE-88B St am Generator- B OD ( ener al ) / TM LOCATION ADS (2!ij 28-39 48-49 ,>49 TOTAL HTS PF 8 g 8 g g 8 2 ~ HTS MID g 16 1 r(j 8 g HTS SF g g g !if g g HTS-Hi g 26 18 t(f g 44

5. Hi !if g 8 g 8 8

6. Hi-H2 8 g g g g 8

7. H2 r(j 8 8 8 g g B. H2-HZ 8 g g 8 g g H3 r(j 8 8 8 8 8

18. H3-H4 8 g 8 8 g

11. H4 8 8 g 8 8 12 ~ H4-H5 8 8 g 8 g r(f

13. HS 8 8 g rrj g 8

14. H5-H6 r(j g g 8 g g

15. H6 !if 8 8 g g 8 16 ~ >H6 g g 8 g

17. AVB1 g 8 r(f 8 8 g

18. >AVB1 8 g g 8 g g 19 ~ AVB2 8 r(j 8 8 g 8

>AVB2 g r(f 8 8 g g 1 ~ >AVB~ g g 8 g g g AVBZ g g 8 8 !if g 22v >AVB4 g 8 V(j g 8

24. AVB4 8 !if 8 8 8

25. >C6 8 8 8 r(j g C6 8 g g g g 27 ~ C6-C5 g 8 8 g r(f 8

28. C5 8 !if g r(f !if 8 C5-C4 8 r(j r(f g cZj 8 Zr(j. C4 8 g r(j g r g C4-C3 8 g r(f r(j g M2r ~ C3 g g 8 g 8 3Z Ce-C2

~ !if g r(j 8 g g Z4. C2 8 g 1 g 8 25 C2-Ci

~ g !if g g 8 g

>6. Ci 8 g 1 8 g 1

~i 7 ~ Ci-CTS g 2 g 8 8 ZB. CTS SF g g 8 g g 8 CTS MID 8 1 8 g 2 4g, CTS PF g 8 g !if g 41 ~ OTHER g 8 g g g g TOTALS g 45 Zi 8 8 76 PERCENT- 8.8 59 ~

- 48.8 !if . !if r(f. g 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 A-S/G B-S/G Sizeable 0-25'A 26- 50Ã 51-75Ã 76-100/o TOTAL TOTAL March 1979 (0)

December 1979 -

0 (0)

Apri 1 1980 19 (0) 31 November 1980 (0)

April 1981 5 (0) 14 February 1982 (0) '9 October 1982 27 7(l) 16 (1)

April 1983 11(3) 3(l) (4)

March 1984 0(i) (1)

March 1985 23 9(l) 27(l) (2)

February 1986 3(2) 9(2) i4(i) 25 (5)

February 1987 82(17) 8(l) i6(3) 46(13) (34) 153 February 1988 22(3) 7(2) 11(2) (7) 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 <20Ã TWD (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 14 !d. 84 96 M HTS 1!3. 6 PLG SCC Si TSP H 74i<f li 11 ii 33 26 19 21 27 Id. '99

1. 5!3

8. 53 72 ADS 61 21 84 M

M M

2 HTS 1

1 HTS HTS

13. 7 PLG

16. 9 PLG

12. 6 PLG IGA SCC SCC Si Ii Qi TSP TSP TSP H

H H

74!d 74!d 74!d 27 28 4. 91 ii 11 11 1

1 ~

58 51

6. 15 2.!d3 68 78 28 ADS 13 ADS M

M M

1 HTS 2 HTS 2 HTS

15. 1 PLG

14. 6 PLB

18. 5 PLG SCC IGA 56 ISA 06 Oi TSP TSP TSP H

H H

4 7

7 74!d 74!d 74IA TABLE 6 PAGE 28 OF 40

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Plant - G INNA Steam Generatar- B REPORT: TUBES REQUIRINS CORRECTIVE ACTION SG ROW COL VOLTS DEB IND CHN LOCATION COMMENTS EXTENT PRB 21 8 13 1. 69 81 M HTS 17. 1 PLS SCC ¹1 TSP H 743 2f 38 22 g. 83 112 68 1 HTS 18. 8 PLG SCC Ni TSP H 74g 21 38 31 nf 5 1 . 52 114

8. 91 121 53 M 1 1

HTS HTS

17. 8

16. 1 PLB PLG SCC ¹}

SCC ¹1 TSP TSP H H 13 74!d 728 21 14 8 ~ 76 77 78 M 1 HTS }2. 8 PLG SCC ¹1 TSP H 748 28 4 96 33 SQR 2 HTS 13. 9 PLG SCC HTS 748 21 21 12 3}

36 37

l. 6119 8

~

~

34

. 74 ADS SQR M

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16. 5 PLS PLG IBA SCC

¹6

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C H

13 4.

72g 74i<f 38 '4. 48 4'9 ADS M HTS 16 8 PLG

~ IGA ¹1 TSP H 13 72g 21 48 38 4. 97 183 ADS HTS 18,8 PLB IBA ¹1 TSP H 74'!d 2f 3 2 51~ 55 ADS M HTS 16. 3 PLB IGA ¹1 TBP H 72$

2} 8 2 82~ 82 ADS M HTB 15. 1 PLB IGA ¹1 TSP H 13 72!3 21 48 48 4 51~ 47 91 M 1 HTS 18. 4 PLB SCC ¹6 TSP H 4 748 8 41 8. 43 ADS HTS 14. 7 PLG IBA ¹6 TSP H 13 72<3 21 34 41 5. 82 35 ADS M 2 HTS 17 9 ~ PLG IGA ¹6 TSP H 4 74!d 36 43 4. 88 68 M 1 HTS 18. 3 PLG SCC ¹6 TSP H 5 748 21 27 45 8. 66 73 74 M 1 HTS 7.1 PLG SCC ¹6 TPS H 5 74!d 41 46 1. 67 5v 87 M 1 HTS 17. 6 PLB SCC ¹6 TSP H 5 74!d 48 5. 31 48 ADS HTS 8.3 PLS IGA ¹6 TSP H 11 748 21 17 48 3. 64 69 76 HTB PLB SCC ¹6 TSP H 6 748 32 48 5. 67 44 ADS M HTB }6. 7 PLG IGA ¹6 TBP H 6 748

8. 98 SCC ¹1 TBP 1

2 49 49 49 3

3 71

'7 98 68 ADS 7 ADS M

M 2 HTS HTS HTS

16. 5 PLG 9 8 PLG

~

}!i> 9 PLB

~

IBA ¹4 TSP ISA, ¹6 TSP H

H H

36 6

6 72g 74!d 74<3 21 18 51 2 23

~ 43 ADS HTS 17. 1 PLG IGA ¹6 TSP H 6 74<3 21 28 51 3. 62 67 78 HTS 11.6 PLB SCC ¹6 TSP H 6 74g 21 4 52 4. 49 34 ADS HTS 2 PLG IGA ¹6 TSP H 11 74!d 21 4 55 2 ~ 34 ADB HTS 14 8~ PLB IGA N6 TSP H 7 748 21 f2 55 8'.

21 ADB M 2 HTS 15. 2 PLG IBA ¹6 TSP H 7 748 21 14 55 83 ADS M HTB 15 ~ 2 PLG IGA N5 TSP H 7 74!3 55 1.'34 54 85 13. 3 SCC ¹6 TSP 2<d HTS PLG H 7 74!3 21 1 58 46 M 1 HTS 17. 3 PLG SCC ¹6 TSP H 8 74!d 61 3 53 47 84 M 2 HTS 12. 9 PLG SCC ¹6 TSP H 74<3 21 28 62 f, g2

~

42 ADS M 2 HTS 9.5 PLB IBA ¹6 TSP H 74!d 64 4 54

~ ADS M HTS 13. 9 PLG IGA ¹6 TSP H 748 65 61 ADS M HTS 12 9~ PLB IGA ¹6 TSP H 18 748 25 66 7. 67 48 ADS M 2 HTS 6.8 PLG IBA ¹6 TSP H 18 748 21 72 3. 58 17 53 M 1 HTS 16. 5 PLS SCC ¹1 TSP H 11 748 73 2. 17 48 91 M 1 HTS 17 2~ PLG SCC ¹1 TSP H 11 74<d 21 81 1. 58 76 82 1 HTS 15 9~ PLG SCC N} TSP H 11 74!d 2 82 2. 58 58 85 M 1 HTS 16 7~ PLG SCC ¹1 TSP H 11 748 TABLE 6 (con't)

PAGE 29 OF 40

"A" STEAM GENERATOR ANTIVIBRATIQN BAR EVALUATION RESULTS TYPE OF PLUS INSTALLED ROW CQL HOT LEG COLD LES COt'IMENTS 12 CE-MECH CE-SENT I NEL NQ AVB SUPPORT 12 4 CE-MECH CE-SENTINEL NO AVB SUPPORT 12 5 CE-MECH CE-SENTINEL NO AVB SUPPORT 12 CE-MECH CE-SENTINEL NO AVB SQPPORT 12 7 CE-MECH CE-SENTINEL NO AVB SUPPORT 12 5 CE-t'IECH CE-SENTINEL NO AVB SUPPORT iu 6 CE-MECH CE-SENTINEL NO AVB SUPPORT TABLE 7 PAGE 30 OF 40

"B" STEAM GENERATOR ANTIVIBRATION BAR EVALUATION RESULTS TYPE OF PLUG INSTALLED ROW COL HOT LEG COLD LEG COMMENTS CE-MECH CE-SENTINEL NO AVB SUPPORT 4 CE-MECH CE-SENTINEL NO AVB SUPPORT 12 5 CE-MECH CE-.SENTINEL 'O AVB SUPPORT 12 6 CE-MECH CE-SENTINEL NO AVB SOPPQRT 14 CE-MECH CE-SENTINEL NO AVB SUPPORT 15 3 CE-MECH CE-SENTINEL NQ AVB SUPPORT 12 87 CE-MECH CE-SENTINEL NQ AVB SUPPORT 12 88 CE-MECH CE-SENT INEL NO AVB SUPPORT 12 89 CE-MECH CE-SENTINEL NO AVB SUPPORT 12 'P!3 CE-MECH CE-SENTINEL NQ AVB SUPPORT 1~~ 88 CE-MECH CE-SENT INEL BQX EXISTING PLUG 14 88 CE-MECH CE-SENT I NEL BOX EXISTING PLUG 15 88 CE-MECH CE-SENT INEL BOX EXISTING PLUG lh 88 'CE-MECH CE-SENT I NEL BOX EXISTING PLUG 17 88 CE-MECH CE-SENT INEL BOX EXISTING PLUG 18 88 CE-MECH CE-SENT I NEL BOX EXISTING PLUG ia 89 CE-MECH CE-SENT INEL BOX EXISTING PLUG 14 8'7 CE-MECH CE-SENT I NEL 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

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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

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GINA STEAII EBKRATOR TUBE IttSPECTIN AM) CORRECTIVE ACTION HISTORY TOTAL FRIIIARY TUBES NO. PLUGGED TO REQUIRING TYPE >48X RETURHED SECOttDARY CORRECTIVE OF REWIRED tt8. TUBES HO. TUBES TO SERVICE NO. SLE&'ES NO. PMED TOTAL TOTAL N. TUBES INSPECIED LEAKAGEi 6Ptl ACTIN DEGRADATIN REPAIRS PLU66ED SLEEVED WITH SLEEVE PLUGGED TUBES PLlSGED SLEEVED CMIEIIT A B A B A B A 8 A B A B A B A B A B A B HOT COLD HOT COLD Itt FAC'LORY I 9 I 8 I 8 8 8 8 9 I 8 8 8 APRIL 1972 1958 8 9 8 8 9 8 9 8 8 S 8 8 9 9 HcKH 1974 3259 516 1898 516 19 8 WASTAGE 19 9 19 8 8 8 2 8 19 8 HOV. 1974 1781 439 672 39 2 9 WASTAGE 2 8 2 9 8 9 9 8 2 8 NRCH 1975 2174 442 1931 442 8 895 A S/6 46 11 CRACK IHG/WASTA6E 46 11 46 II 8 9 2 8 46 11 8 8 JAH. 1976 8 9 53 9 8.891 B S/G 8 2 WASTAGE 8 2 8 2 8 9 9 8 8 2 FEB. 1976 3192 3192 , 3247 3247 39 2 WAST A6E 39 2 39 2 8 9 8 8 2 AFRIL 1976 198 9 1825 75 9.999 B S/6 8 15 CRAIXIttG 9 15 8 15 8 9 9 8 8 15 APRIL 1977 2883 268 1525 268 13 2 ltASTAGE 13 I 13 I 8 8 8 8 13 Jm.Y 1977 MS 8.912 8 S/6 9 6 ID CRACKIHG 9 5 8 5 8 9 8 8 8 5 9. 9 JAN ~ 1978 9.86 B S/6 8 8 CRNXIttGIWAS TAGE 8 8 8 8 8 8 8 8 8 8 APRIL 1978 2849 325 1714 375 I 15 ID CRACKIHG I 15 I 15 9 9 8 I I 15 FEB. 1979 2849 325 1714 375 8 6 CRACKING/WASTAGE/IGA 8 6 8 6 8 9 8 8 8 6 DEC. 1979 8.887 B S/6 8 13 ISA/WASTAGE 8 13 9 13 9 9 8 13 AFRIL 1988 3139 325 3182 375 I 31 A'PITTIttG/'8'IGA I 13 1 34 8 9 8 3 I 34 8 ~ 8 I ttOV. 1988 3138 325 3151 375 9 9 16A 8 2 8 8 8 5 9 9 9 8 8 5 2 AY 1981 3138 325 3141 488 8 4 ISA/WASTAGE 8 6 8 4 9 16 8 3 8 4 916 3 FEB. 1982 3137 526 3148 526 789 8 S/6 8 18 IGA/NECH. DAtt 8 16 9 18 9 9 8 I 9 18 K' 1982 3138 382 31"9 893 I 16A I 28 I 33 8 8 8 8 APRIL 1983 3137 3896 832 4 IGA/SCC 8 23 8 4 74 9 I 8 4 473 5 i%%2 1984 3137 717 3893 963 I I IGA/SX 8 5 I I 9 9 8 9 I 2 8 8 HARCH 1985 3135 3135 M87 3987 4 IGA/SCC/WASTAC< 3 78 2 4 2 67 9 S 2 4 2 67 6 FEB. 1986 3134 623 3883 778 27 IGA/SCC/WASTAGE 2 49 9 27 6 38 8 8 8 24 633 7 FEB. 1987 3128 8 2884 8 34 73 16AISK 17 78 18 72 24 88 8 8 19 75 24 77 FEB. 1988 3122 1517 2723 IMI 7 41 16A/SCC 4 18 14 58 9 8 8 8 15 59 "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 STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY COMMENTS t

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

)40Ã TWD 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

0STEAM 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