ML17251A617

1986 Steam Generator Eddy Current Exam Summary Rept.

ML17251A617
Person / Time
Site:	Ginna
Issue date:	03/01/1986
From:	Curtis A, Henry G, Snell T ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17251A616	List: ML17251A615 ML17251A617
References
NUDOCS 8603270184
Download: ML17251A617 (40)

Text

RO,CHESTER GAS R ELECTRIC CORPORATION RESEARCH AND SCIENCES DEPARTMENT MATERIALS ENGINEERING DIVISION 1986 STEAM GHNHRATOR EDDY CURRENT EXAMINATION'

SUMMARY

REPORT FOR R.E. GINNA NUCLEAR PO)VHR PLANT MARCII 1, 1986 PREPARED BY:

G.L. Henry, NDH Technician, Materials Engineering Level II HT PRHPARHD BY:

T.F. S ell ND Tec nician, Materials Engineering

~

Level II ET APPROVED BY:

A.H. Cur tis III, Manager, Materials Engineering Level III Examiner pgp ADOCH, 05000g24~4 8

TABLE OE'CONTENTS

1.0 INTRODUCTION

2.0, DATA ACQUISITION PROGRAM 3.0 DATA ANALYSIS RESULTS

SUMMARY

4.0 OBSERVATIONS 5.0 CORRHCTIVH ACTION

INTRODUCTION The following report is a summary of the results of the multifrequency eddy current examination performed during the February 1986 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 tubes having a nominal 0.875" O.D. by 0.050" wall thickness.

The examination was performed by Rochester Gas 8e Electric (RGRE) personnel that have been trained and qualified in the eddy current method to at least a Level I certification. Other personnel support during data acquisition was provided by Westinghouse Electric Corporation and the Babcock 8z Wilcox Company (BhW). The initial data analysis review was performed by a team of ZETEC personnel. An independent data analysis review was performed by RGhE and B&W personnel subsequent to the Zetec analysis. The data analysis was performed, by both teams, utilizing the Zetec DDA-4 Digital Data Analysis System. In addition, Westinghouse Electric Corporation's Intelligent Eddy Current Data Analysis System (IEDA) was utilized as a third review of the data as part of an RG8cE Research and Development Project. Final resolutions of all data analysis performed by RGfkE Level II and 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 April 1985. Particular attention was given to detecting intergranular attack (IGA) and stress corrosion cracking (SCC) in the tubesheet crevice region; pitting and wastage between the tubesheet and first tube support plate; denting and wear fretting at the antivibration bar to tube intersections in the U-bend region.

DATA ACQUISITION PROGRAM The eddy current examination of the "A" 11 5 "B" steam generators was performed utilizing the Zetec MIZ-18 Digital Data Acquisition System.

The frequencies selected were 400, 200, 100 and 15kHz, all of which were run in the differential and absolute modes. The examination was performed primarily with a standard 0.740" 0.720" O.D. bobbin coil with smaller diameter probes used to traverse the smaller radius U-bends.

Prior to the examination of the steam generators, a prograni was established for each leg (inlet and outlet) of both the'A" and "B" stean>

generator. The philosophy in generating this program is to provide 100%%uo examination of each steam generator up to the first tube support plate along with one fifth of the tubes being selected for a full length inspection.

This will provide 100% inspection of all tubes every five years. Table I is a breakdown, by steam generator, of all tubes examined and to the extent tested.

STEAM GENERATOR "A" 1986 EDDY CURRENT EXAMINATION PROGRAM PRIOR TO CORRECTIVE ACTION EXTENT TESTED NUMBER OF TUBES PERCENTAGE FULL LENGTH 612 18.8%

PART LENGTH FROM INLET gl TSP H 2240 68.7%

¹2 TSP H 248 7.6%

g3 TSP H 24 0.7%

g4 TSP H 6 0.2%

g5 TSP H 0 0,0%

¹6 TSP H 0.1%

SLEEVED TUBES 100.0%

TUBES PERMANENTLY PLUGGED 126 3.9%

PART LENGTH FROM OUTLET

¹1 TSP C 0.0%

g2 TSP C 0.0%

¹3 TSP C 0,0%

g4 TSP C 0 '%

g5 TSP C 0.0%

g6 TSP C 0.3%

U-BEND 0.0%

g6 TSP H 2 0. 1%

g5 TSP H 0 0 '%

¹4 TSP H 0. 0.0%

¹3 TSP H 0 0.0%

¹2 TSP H 0 0.0%

¹1 TSP H 0 0.0%

HTS 0 0 '%

TABLE 1

STEAN GENERATOR "B" 1986 EDDY CURRENT EXAHINATION PROGRAtt PRIOR TO CORRECTIVE ACTION EXTENT TESTED tfUHBER OF TUBES PERCENTAGE FULL LENGTtt 703 21.6%

PART LENGTH FROtt INLET 81 TSP H 2293 70.3%

g2 TSP H 14 0.4%

g3 TSP H 1 <0.1%

g4 TSP H 0 0.0%

g5 TSP H 1 <0.1%

g6 TSP H 59 1.8%

SLEEVED TUBES 171 100.0%

TUBES PERNANENTLY PLUGGED 177 5,4%

PART LENGTH FROM OUTLET gl TSP C 0 0.0%

g2 TSP C 0 0,0%

g3 TSP C 0 0.0%

g4 TSP C 0 0.0%

g5 TSP C 0 0.0%

g6 TSP C 63 1,9%

U-BEt)D 0 0.0%

g6 TSP H 0,1%

g5 TSP H 0,0%

g4 TSP H 0.0%

P3 TSP H 0.0%

f2 TSP H 0.0%

Pl TSP H 0 '%

HTS 0.0%

SLEEVE END 159 93.0%

TABLE 1 CON'T

DATA ANALYSIS RESULTS

SUMMARY

The initial and independent review data analysis was performed using the Zetec DDA-4 Digital Data Analysis System. Edition 18.1 of th'e ~

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-9836 computer from the data cartridge recorder. The tube number identification is encoded on the data cartridge.

A message block is available should any comments be desired during da'ta acquisition.

I 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 >20%%uo TWD indications for each steam generator (inlet and outlet) can be found in this section. An explanation of the abbreviations and nomenclature used on these lists has been compiled for ease of interpretation.

Table II has been compiled to show a list of the total number of dents at each axial elevation and a breakdown of defects by percent TWD.

The dent indications on this table are only those with signal amplitude of 5 volts and greater, which would approximate about a 0.025" dent on the diameter of the tube.

S G "A" DEttT & DEFECT LOG FEBRUARY 1906 INSPECTION INLET OUTLET DEttTS: DENTS:

HTS"MID 9 CTS-tlID 0 HTS 242 CTS 3 HTS"1H 6 CTS"1C 3 1H 230 1C 6 1H-2H 1C-2C 0 2H 17 2C 5 2H"3H 0 2C-3C 1 3H 0 3C 1 3H-4H 0 3C-4C 0 4H 1 4C 3 4H-5H 0 4C-5C 0 5H 10 5C 1 5H-6H 2 5C-6C 1 6H 117 6C 7

>6H 1 >6C 0 AVB1 0 AVB4" 0

>AVB1 0 >AVB4 0 AVB2 0 AVB3 0

>AVB2 0 >AVB3 0 TOTAL DENTS " 639 TOTAL DEtlTS " 31 DEFECTS: DEFECTS:

0-19% 416 0"19% 124 20-29% 145 20-29% 12 30-39% 16 30"39% 1 40-49% 1 40-49% 0 50 59% 0 50-59% 0 60-69% 0 60-69% 0 70-79% 1 70-79% 0 00-09'%0-100%

0 80-09% 0 0 90-100% 0 TOTAL DEFECTS - 579 TOTAL DEFECTS " 137 TABLE 2

S G "B" DEttT & DEFECT LOG FEBRUARY 1906 IWSPECTZOW INLET OUTLET DENTS: DENTS:

HTS-tlID 6 CTS-ttID 0 HTS 303 CTS 61 ftTS-1H 7 CTS-1C 0 1H 21 1C 4 1H-2H 1 1C-2C 0 2H 0 2C 0 2tt-3H 0 2C-3C 0 3H 0 3C 1 ~

3H-4H 0 3C-4C 0 4H 0 4C 1 4H-5H 0 4C-5C'C 0 5H 1 1 5H-6)t 0 5C-6C 0 6H 36 6C 10

>6H 0 >6C 62 AVBl 0 AVB4 1

>AVB1 0 >AVB4 0 AVB2 0 AVB3 0

>AVB2 0 >AVB3 0 TOTAL DENTS " 375 TOTAL DEttTS - 149 DEFECTS: DEFECTS:

0-19% 265 0-19% 75 20-29% 32 20-29% 1' 30"39% 7 30-39%

40-49% 2 40-49% 0 50-59% 50 59% 0 60-69% 5 60-69% 0 70-79% 13 70-79% 0 00-09% 12 00-89% 0 90-100% 9 90-100% 0 S R 4 TOTAI DEFECTS " 353 TOTAL DEFECTS " 70 T~ABLE 2 ~COtl'T

LIST OF > 20% INDICATION AND CREVICE INDICATION NOMENCLATURE To of List Information SG- Steam Generator and Leg (ie: 1 = A, 2 = B and 1 = Inlet, 2 = Outlet)

ROW - ROW number from the tube identification.

COL - Column number from the tube identification.

VOLTS P-P amplitude of the measured indication signal response.

% Percent through wall from O.D. based on measured signal.

CH@ Channel from which indication was determined.

LOCATION Location of indication relative to tubesheet or support plate.

INDEX - Location of tube data on data disk.

Information Under  %

11

<20 - Measurable indication less than 20% through wall (IGA-SCC).

>40 Absolute indication measured from absolute mix where depth determination could not be accurately performed (IGA only).

SQR Multiple indications interferring with a depth determination (IGA-SCC).

I ~

DS Distorted roll transition indication that cannot be confirmed or measured.

XX - The measure percent through wall of the deepest penetration (SCC) within an IGA patch or area.

TWD Through Wall Dimension Information Under CHP 1 - 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 40% IGA.

I1 LIST OF >Z0% INDICATION AND CREVICE INDICATION NOMENCLATURE (COB'7)

Information Under LOCATION HTS Secondary face of inlet tubesheet.

TSP Tube Support Plate CTS Secondary face of outlet tubesheet.

-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 plates where the indication is located.

RG&E EDDY CDRRE))I It)SFKYIO)I REFORT 'riday february 26, )986 )2:59 FII PNE I PI.AtlT: RG&E - GIHHA STEAH GENERATOR A OUTAGE : RG&E 1906 SGA It)SPECTED FROH BOTH )IL&Cl.

REPORT  : TUBES WITH It)DICATIOHS 20'4 OR GREATER ABW Anti-Vibration Bar Wear BLG Bulge CHT Chatter CPR Copper

" Dent CKS Cracked Support Plate DHT DHG Ding DRT Distorted Roll Transition DTS Distorted Tube Sheet DSP Distorted Tube Support Plate FRT Fretting IHC Incomplete Test IGA Intergranular Attack SCC Stress Corrosion Crack t)GV Hachining Groove t)AG tlagnetite NDD No Detectable Defects HSY Noisy Tube OBS Obstructed FPG Permanent Plug PRH Permeability PIT Pitting RPG Removed Plug SLV Sleeved SLG Sludge SQR Squirrel TPG Template Plug TBR To Be Rerun UBC U"Bend Crack UDS Undefined Signal WTH Mall Thinning WAS Wastage 1&2 B&W Sleeve Tapes ROW COL VOLTS DEG IHD CH ELEV IHCHES COIIHEHTS EXTENT PS ID 7 20 1.54 150 23 1 HTS 2.5 ¹I TSP H 2 740 Hl 7 20 2.14 162 20 1 HTS 1.9 ¹1 TSP fl 2 740 )IL 8 20 1.52 161 20 1 HTS 2,2 ¹I TSP H 2 740 I)L 8 20 1.43 162 20 1 HTS 1.8 ¹I TSP H 2 740 )) I 8 21 2.47 158 23 1 HTS 1.9 ¹I TSP ll 2 740 HL 9 21 2.81 150 29 1 HTS 2 ' ¹1 TSP H 2 740 HL 10 21 1.01 159 22 1 HTS 2.0 ¹1 TSP H 2 740 HL 11 21 4.15 151 29 1 HTS 2.0 ¹1 TSP H 2 740 HL 13 21 2.66 158 23 1 HTS 2.5 ¹1 TSP H 2 '740 HL 14 21 2.16 159 22 1 HTS 1.7 ¹I TSP H 2 740 flL 15 21 3.98 149 30 1 HTS 1.6 ¹I TSP H 2 740 IIL flL 1G 21 2.91 153 27 1 HTS 1.1 ¹1 TSP H 2 740 17 21 1.93 149 30 1 HTS 1.2 ¹1 TSP H 2 740 ifL 10 22 2.15 162 20 1 HTS 3.1 ¹1 TSP H 2 740 HL 11 22 2.77 157 24 1 HTS 2.5 ¹I TSP H 2 740 HL 12 22 2.08 157 24 1 HTS 1.0 ¹1 TSP H 2 740 Hl.

14 22 3.59 159 22 1 fKS 2.0 ¹1 TSP H 2 740 Hl 15 22 3.30 157 24 1 HTS 2.0 ¹I TSP H 2 740 HL 18 22 3.28 155 25 1 HTS 1.2 ¹I TSP Il 2 740 )IL 19 22 1 52 158 23 1 HTS 0.9 ¹1 TSP H 2 740 Hl(

12 23 4.70 158 23 1 HTS 2.8 ¹I TSP'H 2 740 HL 12 23 2.70 158 23 1 HTS 2.1 ¹1 TSP H 2 740 flL 13 23 8.83 150 29 1 HTS 3.2 ¹I TSP H 2 740 HL 14 23 4.43 156 25 1 HTS 3.0 ¹1 TSP H 2 740 HL 21 23 2.56 156 25 1 HTS 1.5 ¹I TSP H 2 740 HL 21 23 1 83

~ 15G 25 1 HTS 0.9 ¹I TSP H 2 740 HL 10 24 1.84 162 20 1 HTS 1.9 ¹G TSP H 2 740 HL 11 24 2.16 159 22 1 HTS 2.8 ¹G TSP H 2 740 HL 12 24 4.10 161 20 1 HTS 2;8 ¹6 TSP H 2 740 Hlj 13 24 5.23 156 25 1 HTS 2.7 ¹6 TSP H 2 '140 HL 12 25 3.72 157 23 1 HTS 2 4

~ ¹6 TSP H 3 740 HL 13 25 3.88 146 32 1 HTS 2.3 ¹6 TSP. H 3 740 HL 14 25 7.55 153 26 I HTS 2' ¹6 TSP H 3 740 HL 17 25 6.86 150 29 1 HTS 2.3 ¹6 TSP H 3 740 HL 17 25 2.82 161 20 1 HTS 2.9 ¹6 TSP H 3 '140 )IL 9 26 3.04 153 26 1 HTS 0.9 ¹6 TSP H 3 740 HL 21 26 3.80 152 27 I HTS 1.9 ¹6 TSP H 3 740 HL 21 26 2.77 159 21 1 HTS 2' ¹6 TSP H 3 740 HL 23 26 1.27 152 27 I HTS 1.8 ¹G TSP H 3 740 HL 17 27 3.57 154 25 1 HTS 2.9 ¹6 TSP H 3 '740 )IL 17 27 3'53 149 30 1 HTS 2.3 ¹6 TSP H 3 740 HL 10 27 5 47 )45 33 1 HTS 2.7 ¹6 TSP H 3 740 IIL 22 27 5.42 )51 20 1 HTS 1.9 ¹6 TSP )I 3 '1'40 HL 22 27 5.63 )53 26 1 f ITS 2.7 ¹6 TSF H 3 740 HL 24 27 2.10 156 24 1 HTS 1.6 ¹6 TSP El 3 '140 HL 25 27 1.68 155 25 1 HTS 1.2 ¹6 TSP H 3 740 HL 28 1,.58 160 21 1 HTS 2.1 ¹6 TSP fl 3 740 HL 28 5.)8 )53 26 I HTS 1.7 ¹6 TSP H 3 740 HL

RGKE EDDY CURRENT INSPECTION REPORT Friday February 28, 1986 12:59 PN PhGE 2 PLANT RG&E " GINNA STEAII GENERATOR OUTAGE RG&E 1986 SGA INSPECTED FROI{ BOTH HL&CL RAPPORT TUBES WITH INDICATIONS 204 OR GREATER ROH COL VOLTS DEG IND CH ELEV INCHES CO((I{ENTS EXTENT REEL PS ID 15 29 4.02 150 29 1 HTS 3.0 HAS CPR g6 TSP H 4 740 HL 24 29 3.11 153 26 1 HTS 1.3

'8 WAS CPR g6 TSP 4 740 IIL 23 30 4.73 153 26 1 HTS 1. WAS CPR g6 TSP H 4 740'L 24 30 3.83 149 30 1 HTS 1.4 WAS CPRA ¹6 TSP fl 4 740 HL 25 30 6.84 155 25 I HTS 1.3 HAS CPR g6 TSP H 4 740 HL 16 31 1.52 161 20 1 HTS 3.7 HAS ¹6 TSP H 4 740 HL.

23 31 4.54 147 31 1 HTS 2.5 WAS ¹6 TSP H 4 740 HI 23 31 6.00 145 33 1 HTS 1.8 HAS ¹6 TSP H 4 740 HL 24 31 4.49 147 31 1 HTS 1.6 HAS ¹6 TSP H 4 740 HL 25 31 5.00 153 26 1 HTS 1.3 HAS g6 TSP H 4 740 HL 26 31 2.54 161 20 1 HTS 1.1 HAS CPR ¹6 TSP H 4 740 HL 26 31 2.37 157 21 1 CTS 1 ~ 7 HAS g6 TSP H 14 720 CL 20 32 3.35 146 32 1 HTS 2.8 WAS g6. TSP H 4 740 HL 22 32 8.03 149 30 1 HTS 1.8 HAS ¹6 TSP H 4 740 HL 23 32 6.02 148 30 1 HTS 2.5 HAS ¹6 TSP H 4 740 HL 24 32 6.20 154 25 1 HTS 1.6 WAS g6 TSP H 4 740 HL 26 32 3.86 153 26 1 HTS 0.9 WAS CPR g6 TSP f{ 4 740 HL 28 32 1.48 158 20 1 CTS 1.1 HAS g6 TSP fl 14 720 CL 21 33 3.13 156 20 1 HTS 2.0 g6 TSP H 5 740 HL 22 33 7.16 152 24 1 HTS 2.4 ¹6 TSP H 5 740 HL 23 33 6.20 150 26 1 HTS 2.2 g6 TSP H 5 740 HL 25 33 3.98 157 20 1 HTS 1.7 ¹6 TSP H 5 740 HL 19 34 2.19 143 32 1 HTS 2.1 ¹6 TSP H 5 740 HL 21 34 4.47 151 25 1 HTS 2.2 g6 TSP H 5 740 HL 23 34 3.66 153 23 1 HTS 2.6 ¹6 TSP H 5 740 HL 25 34 5'47 155 21 1 HTS 1.7 ¹6 TSP H 5 740 HL 26 34 5.22 154 22 1 HTS 1.2 g6 TSP H 5 740 HL 19 35 3.68 151 25 1 HTS 2.2 g6 TSP H 5 740 HL 21 35 4.68 155 21 1 HTS 2.2 g6 TSP H 5 740 HL 21 35 2.15 157 20 1 HTS 0.9 ¹6 TSP H 5 740 HL 22 35 4.04 153 23 1 HTS 1.6 ¹6 TSP H 5 740 HL 22 35 2.79 157 20 1 HTS 2.1 g6 TSP H 5 7.40 HL 23 35 4.92 153 23 1 HTS 2.6 g6 TSP H 5 740 HL 25 35 4.67 155 21 1 HTS 1.5 g6 TSP H 5 740 HL 26 35 4.27 157. 20 I HTS 1.2 ¹6 TSP H 5 740 IIL 0.0 <

> ¹6 g6 TSP TSP C H H 16 720 CL 6 740 HL 26 39 6.70 156 21 1 HTS 2.0 HAS g6 TSP I{ 6 740 HL 26 39 6.70 156 21 1 HTS 2.0 WAS ¹6 TSP H 6 740 HL 28 43 5.30 159 21 1 HTS 1.9 gl TSP H 7 720 HL 29 44 5.49 158 22 1 HTS 1.3 gl TSP fl 7 720 HL 20 45 5.08 8 20 1 CTS 15.6 ID ¹6 TSP C 18 720 CL 21 45 7.34 10 25 1 CTS 15.6 ID ¹6 TSP C 18 720 CL 29 45 4.62 8 20 1 CTS 1.9 ID <<6 TSP C ,18 ' 720, CL 26 46 4.39 157 23 gl TSP H+ 1.4 gl TSP 720 HL 20 47 4 '3 11 26 1 1 CTS 16.3 ¹6 TSP H H 22 720 CL I RGKE EDDY CURRE))T I)ISPECYIO)j REPORT Eriday Eebruary 28, )986 12:59 P)f PAGE 3 PLANT RG&E - GINNA STEAH GENERATOR A OUTAGE RG&E 1986 SGA INSPECTED FROH BOTH HL&CL REPORT TUBES WITH INDICATIONS 204 OR GREATER ROW COL VOLTS DEG IND CH ELEV INCHES COMMENTS EXTENT REEL PS ID 21 47 10.78 10 25 CTS 15.6 ID TSP 18 720 CL 16 48 1.00 162 20 HTS 2' WAS ¹1 TSP H 8 720 HL 26 48 5.83 162 20 HTS 1.4 CPR WAS ¹1 TSP H 8 720 HI 28 48 7.31 158 23 HTS 1.0 WAS ¹1 TSP H 8 720 HL 30 48 4.41 157'62 24 HTS 0.9 WAS ¹1 TSP H 8 720 HL 31 48 2.65 20 HTS 0.8 WAS ¹1 TSP H 8 720 HL 20 49 1.80 158 23 HTS 1.6 ¹1 TSP H 8 720 HL 26 49 3.13 160 21 HTS 1.6 ¹1 TSP H 8 720 HL 28 49 5.71 153 27 HTS 0.5 ¹3 TSP H 8 720 HL 28 49 4.80 155 25 HTS 1.4 5'1 ¹3 TSP H 8 720 HL 16 50 2.71 )57 24 HTS ¹2 TSP H 8 720 IIL 23 50 0.43 155 25 HTS 0.7 ¹I TSP H 8 720 f)L 27 50 2.75 161 20 HTS 0.4 ¹1 TSP H 0 720 HL 28 50 2.26 162 20 HTS 1 6 ~ ¹I TSP H 8 720 HL 29 50 1.26 160 21 HTS 0.7 ¹1 TSP H 8 720 HL 29 50 1.15 156 24 HTS 1.1 ¹1 TSP H 8 720 HL 16 51 1.65 153 27 HTS 4.5 ¹1 TSP H 8 720 HL 17 51 2.53 159 22 HTS 0.6 ¹1 TSP H 8 720 HL 27 51 1.72 153 27 HTS 1.9 ¹1 TSP H 8 720 HL 28 51 3,19 161 20 HTS 1.3 ¹1 TSP H 8 720 HL 13 52 3.20 145 33 HTS 1.7 ¹1 TSP H 8 720 HL 15 52 0.47 158 23 HTS 4.1 ¹1 TSP H 8 720 HL 16 52 4.74 158 23 HTS + 5.0 TSP 8 720 HL 16 53 2.66 157 24 HTS 4.8 ¹1 TSP H 8 720 HL 17 53 0.82 158 23 HTS 4.8 ¹1 TSP H 8 720 HL 17 53 0.82 138 38 HTS 3.8 ¹I TSP H 8 720 HL 19 53 0.62 152 28 HTS 1.9 ¹1 TSP H 8 720 HL 29 53 2.11 160 21 HTS 0.9 ¹1 TSP H 8 720 HL 17 54 1.53 158 23 HTS 3.0 ¹1 TSP H 8 720 HL 17 54 0.83 156 24 HTS 0.7 ¹1'SP fl 8 720 HL 18 54 1.73 152 28 HTS 2' ¹1 TSP H 8 720 HL 16 55 4.19 158 23 HTS 4.0 ¹1 TSP fj 8 720 HL 16 55 1.41 159 22 HTS 3 ' ¹I TSP H 8 720 HI 22 57 7.07 149 26 HTS 1.7 WAS ¹I TSP H 9 720 HL 15 59 4.35 154 21 HTS 2' ¹1 TSP fj 9 720 I)L 15 61 4.86 155 20 HTS 2.1 ¹I TSP fj 9 720 HL 16 61 3.02 156 20 HTS 1.4 ¹1 TSP H 9 720 HL 19 61 3.48 148 27 HTS 1.6 ¹1 TSP fl 9 720 HL 21 61 3.01 155 20 HTS 1.8 ¹1 TSP fl 9 720 HL 15 62 4.37 155 20 HTS 1.9 ¹1 TSP H 9 720 HL 16 62 3.15 154 21 HTS 1 ~ 6 ¹1 TSP H 9 720 HL 20 62 3.03 153 22 HTS 1.7 ¹1 TSP H 9 720 HL 19 63 5.03 151 24 fiTS 1.4 ¹1 TSP H 9 720 HL 17 64 4.40 155 20 HTS 1.6 ¹1 TSP H 10 720 Hl 19 64 6.20 153 22 HTS 1.3 ¹1 TSP fj 10 720 HL 18 66 4.67 152 23 HTS 1.8 ¹1 TSP H 10 720 HL 9 67 5.29 149 26 HTS 0.9 ¹1 TSP 10 720 HL 19 67 3.10 156 20 HTS 1.5 CHT ¹1 TSP 10 720 HL 13 68 2.88 154 21 I)TS 1.6 ¹I TSP 10 720 HL 16 68 4.58 155 20 HTS 2 ' ¹I TSP )0 720 HL 9 6 69 70 2 '3 2.75 148 154 27 21 HTS HTS 1.4 0.9 ¹I TSP ¹1 TSP H 10 720 HL 10 720 HL 14 70 2.92 154 21 HTS 2' ¹1 TSP H 10 720 HL 6 71 4.43 154 21 HTS 1.0 ¹1 TSP H 10 720 HL 71 3.48 150 25 HTS ¹1 TSP H 10 720 HI 7 9 9 72 73 5.44 3.82 158 158 23 23 HTS HTS 1 ~ 1.4 1.6 2 ¹1 TSP H ¹2 TSP H ll 720 HL 11 720 HL 12 73 5.64 153 28 HTS 1 ~ 1 ¹1 TSP H 11 720 HL 8 74 2.28 152 29 HTS 1.0 ¹3 TSP H 11 720 HL 12 76 1.58 161 20 HTS 00.5 WAS ¹1 TSP H 11 720 HL 'l l 91 1.57 155 20 HTS 1.0 ¹1 TSP H 12 720 HL END OF DATA RGRE EDDY CURRENT INSPECTION REPORT '" Friday February 28, 1986 12:58 PN PAGE 1 PLANT  : RG6E - GINNA STEAM GENERATOR  : A OUTAGE : RGRE 1986,SGA INSPECTED FROM  : HOT LEG REPORT  : TUBES REQUIRING CORRECTIVE ACTION ABW - Anti-Vibration Bar Wear BLG - Bulge CHT - Chatter CPR - Copper CKS - Cracked Support Plate DNT - Dent - - Roll Transition DNG DTS - Ding Distorted Tube Sheet DRT DSP - Distorted Distorted Tube Support Plate FRT - Fretting INC - Incomplete Test IGA - Intergranular Attack SCC - Stress Corrosion Crack MGV - Machining Groove MAG - Magnetite NDD - No Detectable Defects NSY - Noisy Tube - PPG - OBS - Obstructed PIT - Permanent Pitting Plug PRM - Permeability - RPG - Removed Plug SLV - Sleeved SLG TPG Sludge - Template Plug SQR TBR - Squirrel To Be Rerun UBC - U-Bend Crack UDS Undefined Signal-WTH - Wall Thinning WAS Wastage 162 - BRW Sleeve Tapes ACT ROW COL VOLTS DEG IND CH ELEV INCHES COMMENTS EXTENT REEI PS ID SLV 22 20 1.56 71 UDS M 2 HTS 17.2 IGA gl TSP H 2 740 HL SLV 21 21 3.87 89 72 1 HTS 18.9 SCC 81 TSP H 2 740 HL SLV 20 22 4.33 55 UDS 2 HTS 14.9 IGA gl TSP H 2 740 HL SLV SLV ll 19 37 50 1.28 165 5.54 128 13 46 M 1 1 HTS HTS 16.5 1.8 g6 gl TSP H TSP H 6 740 8 720 llL HL SLV 7 78 0.60 173 8 1 HTS 17.9 SCC gl TSP H 11 720 HL END OF DATA STEAM GENERATOR "4" TUBES RECEIVING CORRECTIVE ACTION FEBRUARY 2986 PLANT: GXNNA GENERATOR: A TOTAL TUBES: 3260 S>> CE 87'ELDED SLEEVE P>> CE HECHANICAL PLUG ~ ~ ~ ~ ~ ~ ~ - 35 ~ ~ ~ ~ ~ ~ 0 ~ ~ 30 \ ~ ~ ~ ~ ~ ~ A - 35 I ~ ~ ~ ~ ~ ~ ~ Ih 3 ~ IO - 30 I I V ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ - jo . o ~ ~ ~ I I I I I I I I I I I I o oIll 0N O g) O Cl lO O Ill o o lO ID O Cb IlI NOZZLE INLET (Hot Lei) - PI inary Face COLUHNS HANWAY X RG&E EDDY CURREj{T If{SPECTIO(( REPORT friday February 28, f986 12:26 Pll PAGE 1 PLANT : RG&E - GINHA STEAM GENERATOR : B OUTAGE : RG&E 1906 SGB INSPECTED FROM .: BOTH HL&CL REPORT  : TUBES WITH INDICATIONS 20% OR GREATER ABW - Anti-Vibration Bar Wear BLG - Bulge Cf{T - Chatter CPR Copper CKS - Cracked Support Plate DNT Dent - Ding DRT - Roll Transition DHG DTS - Distorted Tube Sheet DSP - Distorted Distorted Tube Support Plate - Incomplete Test - Fretting FRT IHC IGA Intergranular Attack SCC Stress Corrosion Crack MGV - Machining Groove MAG Magnetite HDD - No Detectable Defects HSY Noisy Tube OBS Obstructed PPG - Permanent Plug PRM - Permeability PIT Pitting - Removed - Sleeved - Sludge Plug RPG SLV SLG SQR Squirrel - To TPG Template Plug TBR Be Rerun UBC - U-Bend Crack UDS Undefined Signal WTH - Wall Thinning. WAS - Wastage 1&2 - B&W Sleeve Tapes ROW COL VOLTS DEG IHD CH ELEV INCHES . COMMENTS EXTENT REEL PS ID 10 6 2.33 141 35 g2 TSP C+ 0.0 g6 TSP C 29 720 CL 9 21 6.06 155 '20 HTS 1.7 gl TSP H 8 740 HL 11 22 4.06 153 22 HTS 1.5 gl TSP H 8 740 f{L 20 24 4.00 153 22 HTS 1.6 g6 TSP fl 8 740 HL 9 25 3.18 153 26 HTS 1.3 WAS g6 TSP H 9 740 HL 15 25 3.12 153 26 HTS 2' WAS g6 TSP H 9 740 HL 17 25 5.51 146 32 HTS 1.5 WAS g6 TSP H 9 740 HL 22 25 0.65 156 23 HTS t 2' WAS g6 TSP H 9 740 HL 24 25 5.92 141 37 HTS t 1.8 ¹6 TSP H 9 740 HL 17 26 5.08 147 28 HTS + 1.2 WAS g6 TSP H 4 740 HL 19 26 6.02 145 "31 HTS 1.2 WAS g6 TSP H 4 740 HL 24 26 6.10 149 26 HTS 1.3 WAS g6 TSP H 4 .740 HL 22 27 4.35 153 22 HTS 1.8 WAS g6 TSP H 4 740 HL 21 28 3.87 155 20 HTS 1.6 WAS g6 TSP H 4 740 HL 23 28 3.81 153 22 HTS 1.6 WAS g6 TSP H 4 740 HL 19 24 42 '0 29 31 7.99 5.74 1.57 155 20 155 144 20 30 HTS HTS CTS 1.5 1.4 15 ' WAS WAS CPR g6 TSP H g6 TSP H ¹6 TSP H 16 4 5 740 740 720 HL HL CL 17 33 0.89 160 21 TUBE ENDt 12.1 HTS 1&2 610 fll 24 34 1.56 148 27 HTS 1.5 CPR g6 TSP H 6 740 f{L 22 30 1.36 153 21 CTS 1.1 WAS g6 TSP fl 15 720 CL 41 30 1.01 140 33 TUBE EHDt 5 4 flTS 1&2 610 HL 41 38 1.49 158 23 TUBE EHDt 6.7 HTS I&2 610 f{L 24 41 3.18 144 32 HTS 1.3 WAS CPR ¹I TSP H 7 740 fll 31 43 0.64 153 22 HTS 16 ' HTS 28 610 HL 27 45 4.07 155 ,20 HTS + 1.6 WAS gl TSP H 8 740 HL 25 50 2.56 153 26 HTS 3' WAS gl TSP fl 9 740 HL 23 51 1.03 150 21 HTS 6.9 WAS gl TSP H 10 740 HL 26 51 1.64 140 31 HTS 0.9 WAS gl TSP H 10 740 HL 25 53 0.96 153 26 HTS + 4.1 WAS gl TSP f{ 10 740 HL 23 56 1.19 154 27 TUBE ENDt F 6 HTS 1&2 610 HL 30 56 2.06 150 21 HTS + 2.2 WAS ¹1 TSP H 10 740 f{L 19 62 2.51 149 30 HTS + 1.5 CPR WAS gl TSP H 10 740 HL 22 20 62 62 4.13 2.90 161 158 22 20 HTS HTS 1.5 1 ~ 6 WAS WAS gl gl TSP H TSP H ll 11 740 740 HL HL 20 62 2.87 153 26 HTS I 5 CPR WAS gl TSP H 10 740 HL 30 62 2.21 150 22 HTS 0.9 WAS gl TSP H 11 740 f{L 20 24 63 64 2.88 4.59 147 155 20 27 HTS HTS + 2.5 2.5 WAS WAS gl gl TSP H TSP H ll 11 720 720 HL f{L 26 24 64 65 3.54 2.93 149 155 20 25 ~ HTS HTS + 1.8 2.2 WAS WAS gl gl TSP H TSP H ll ll 720 720 HL HL EHD OF DATA RG&E EDDY CURRENT INSPECTION REPORT Friday February 28, )986 12;21 PN PAGE I PLANT : RG&E GINNA STEAH GENERATOR : B OUTAGE : RG&E 1986 SGB IHSPECTED FROM : HOT LEG REPORT  : TUBES REQUIRIHG CORRECTIVE ACTIOH ABW Anti-Vibration Bar Wear BLG - Bulge CHT - Chatter CPR - Copper - Support Plate - Dent - Cracked CKS DHT DNG Ding DRT - Distorted Roll T'ransition DTS - Distorted Tube Sheet DSP - Distorted Tube Support Plate FRT - Fretting INC - Incomplete Test IGA Intergranular Attack SCC - Stress Corrosion Crack ~ MGV - Hachining Groove HAG - Maqnetite NDD - No Detectable Defects HSY - Horsy Tube OBS Obstructed PPG - Permanent Plug PRM - Permeability PIT - Pitting - Plug SLV - Sleeved RPG SLG - Removed Sludge SQR - Squirrel TPG - Template Plug TBR - To Be Rerun UBC - U-Bend Crack UDS - Undefined Signal - WAS - Wastage WTH 1&2 - Wall Thinning B&W Sleeve Tapes ACT ROW COL VOLTS DEG IHD CH ELEV INCHES COHHEHTS EXTENT REEL ID PLG 3 4 0.96 102 62 HTS 17.5 SCC gl TSP H 740 HL 3 4 1.00 67 83 H HTS 18. 0 SCC gl TSP H 740 HL PLG 2 6 3.54 70 56 M 2 HTS 17.3 SCC gl TSP H 1 740 HL PLG 11 6 0.52 45 97 1 HTS 16.7 SCC gl TSP )I 1 740 f)L PLG 9 9 0.58 60 84 1 HTS 10.3 SCC ¹1 TSP fl 1 740 HL PLG 18 10 4.09 . 60 59 M 2 HTS 16.9 SCC gl TSP H 1 740 )IL PLG 8 11 0.05 31 UDS HTS 19.1 PDRT SCC gl TSP H 2 740 HL SLV 7 13'.72 97 65 H 1 HTS 17.3 gl TSP H 2 740 IIL SLV 8 15 1.31 57 72 M 2 HTS 7.1 gl TSP H 2 740 HL PLG 29 15 0.01 23 71 H 2 HTS 19.2 PDRT SCC gl TSP f) 2 740 HL, SLV 16 17 2.36 052 78 M 2 HTS 15.3 ¹I TSP fl 2 740 HI SLV 10 19 0.69 157 '19 1 HTS 17.5 SCC gl TSP H 8 740 )IL PLG 30 21 1.14 60 80 1 HTS 17.3 SCC gl TSP H 8 740 HL SLV 9 23 0.93 92 SQR H HTS 16.0 gl TSP H 740 HL 9 23 1.58 00 27 M HTS 14.1 gl TSP H 740 HL PLG 32 23 3.06 22 64M2 HTS 16,2 IGA gl TSP H 8 740 ))L SLV 23 24 0.42 135 42 1 HTS 2' WAS g6 TSP H 9 740 )IL PLG 2 27 0.36 43 UDS M 2 HTS 10.5 PNDD IGA ¹6 TSP H 4 740 )IL SLV 22 29 2,34 163 49 1 HTS 1.4 P 10%WAS g6 TSP H 4 740 ))L SLV 29 33 0.40 99 69 I HTS 18.5 CPR SCC ¹6 TSP H 5 740 HL SLV 19 34 1.02 93 72 1 HTS 0.3 RPG SLV g4 TSP C 27 720 HL SLV 29 34 1.26 72 83 1 HTS 18.2 SCC CPR g6 TSP H 6 740 HL PLG 38 36 0.95 33 UDS I HTS 18.1 IGA ¹6 TSP H 6 740 f)L SLV 5 37 0.50 60 UDS 1 HTS 10.4 IGA ¹6 TSP H 7 740 HL SLV 6 37 0.91 60 05 1 HTS 17.9 SCC g6 TSP H 7 740 HL PLG 35 37 4.03 47 04M2 HTS 10.4 SCC CPR g6 TSP H 6 740 HL PLG 35 38 1.37 160 SQR 1 HTS 18.3 SCC g6 TSP H 7 740 HL PLG 36 30 UDS HTS 17.0 IGA ¹6 TSP H 740 )IL 36 38 0.79 56 92 HTS 19.2 SCC g6 TSP ff 740 HL PLG SLV 38 31 38 39 2 0 '5 '2 05 47, UDS UDS HTS HTS 18.9 17.2 DRT g6 TSP H IGA g6 TSP H 7 7 740 740 f)L HL PLG 42 39 3.70 63 UDS M HTS 16.0 IGA g6 TSP H 7 740 HL SLV 19 42 5.62 63 UDS M fITS 7.9 IGA gl TSP H 7 740 HL SLV 21 42 1.50 86 77 HTS 9.9 RPG SLV g6 TSP C 27 720 III PLG 1 43 0.63 115 56 HTS 16.6 SCC CPR gl TSP H 7 740 HL SLV 23 46 0.59 113 55 )ITS 10.2 SCC gl TSP H 8 740 HL SLV 27 47 2.12 56 73 M HTS 10.0 SCC gl TSP H 9 740 HL SLV 9 48 0.41 86 77 HTS 17.3 SCC g) TSP fl 9 740 HL SLV 11 49 0.30 52 91 M HTS 16.7 SCC ¹I TSP H 9 740 HL SLV 21 49 0.43 75 76 H HTS 0.2 SCC ¹1 TSP fl 9 740 HL SLV 26 49 0.23 55 09 M HTS 18.2 SCC gl TSP H 9 740 HL SLV 31 49 2.56 15 SQR H )ITS 10.6 SCC gl TSP fl 9 740 HL SLV 32 49 0.40 60 90 HTS 17.1 SCC ¹1 TSP H 9 740 HL RGKE EDDY CURREEIT IRSPECTIOR REPORT "'riday Eebruary 28, 1986 12:21 Plf PAGE 2 ~ PLANT  : RG&E " GINNA STEAM GENERATOR B r OUTAGE : III RG&E 1986 SGB INSPECTED FROM  : HOT LEG REPORT  : TUBES REQUIRING CORRECTIVE ACTION ACT ROW COL VOLTS DEG IND 'CH ELEV INCHES COMMENTS EXTENT REEL PS ID SlaV 7 50 0. 73 53 90 M I HTS 17.4 SCC gf TSP H 9 740 HL SLV 31 52 0.96 70 05 1 HTS 16.3 SCC 81 TSP H 10 740 Hf. PLG 1 53 2.07 30 SQR M 1 HTS 17.5 CHT SCC gl TSP H 11 720 Hla SLV 21 55 1.32 74 03 1 HTS 5.6 RPG SLV g6 TSP C 27 720 HL SLV 24 50 0.58 50 91 1 HTS 13.8 SCC Pf TSP H 10 740 EIL PLG 30 50 3.23 51 79 M 2 HTS 16.9 SCC Elf TSP H 10 740 HL PLG 38 59 1.00 08 75 1 HTS 10.0 SCC fff TSP H 10 740 HL PLG 38 60 0.95 77 01 1 HTS 17,4 SCC Sf TSP H 10 740 HL'l SLV 8 69 1.03 00 61 1 HTS 17.7 SCC 4'I TSP H 11 720 SLV PLG 30 9 70 71 0.70 1.90 72 75 77 79 M M 1 HTS 1 HTS 14.6 17.6 SCC gl TSP CPR SCC Pf TSP H H ll 12 720 720 HL HI. PLG 21 76 1.04 58, 90 I HTS 17.4 SCC gf TSP H 12 720 Ella PLG 22 76 1.15 92 70 1 HTS 17 3~ SCC gf TSP El ~ 12 720 Ill. SLV 3 70 1.76 72 02 1 HTS 17.6 SCC gf TSP H 12 720 HL PLG 2 80 6.69 38 89 M 2 HTS 17.9 SCC gf TSP H 12 720 HL PLG 19 80 0.61 56 91 1 HTS 16.7 SCC gf TSP H 12 720 HL PLG 20 80 0.75 42 94 M 1 HTS 16.0 SCC gf TSP H 12 720 EEL END OF DATA STEAM GENERATOR "B" TUBES RECEIVING CORRECTIVE ACTION FEBRUARY 1986 PLANT: GINNA GENERATOR: B TOTAL TUBES: 3260 S ~ CE 27'ELOED SLEEVE P ~ CE KECNANICAL PLUG ~ ~ P ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ P ~ P . . ~ PP ~ ~ ~ ~ ~ ~ P ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 0 ~ ~ ~ ~ ~ ~ P ~ 'S' ~ ~ ~ 0 ~ ~ ~ ~ ~ ~ ~ S ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ S ' 'S ~ ~ ~ ~ ~ ~ SS ~ ~ ~ ~ ~ ~ ~ ~ S ~ ~- ~ I ~ ~ ~ ~ OI ~ ~ ~ S ~ ~ ~ ~ PE ~ ~ C3 ~ S ~ . ~ ~ . S ~ ~ P ~ IZ 20 ~ ' ~ ~ 'ES ~ ST ~ ~ ~ ~ ~ I I P ~ ~ ~ ~ ~ V 0 ~ S ~ ~ ~ Il - X5 C ~ ~ x ~ ~ ~ ~ ~ ~ P ~ ~ I ~ P ~ ~ C - so 4J a CO ~ ~ ~ P P ~ ..~ 0 ~ ~ S ~ ~ ~ ~ ~ 3 ~ ~ 0 ~ ~ ~ 3 ~ ~ ~ ~ ~ ~ ~ P ~ ~ ~ ~ ~ ~ P ~ PE ~ . ~ ~ ~ ~ ~ P' ~ P . I I I I ' I I I I I I nCII Cl CII Rl CII CCI II CCI CCI ICI CO O CII NOZZLE INLET (Hot Leg) - Primary Face COLUNNS HANKAY OBSERVATIONS The results of the examination indicates that intergranular attack and stress corrosion cracking is still active within the tubesheet cr evice regions on the inlet side of each steam generator.- The IGA/SCC, is primarily located in the "B" steam generator with 52 total indications detected, only 5 indications were detected in the "A" steam generator. Table III shows the steam generator IGA history. GINNA'S STEAM GENERATORS CREVICE CORROSION INDICATION HISTORY B-Steam Generator (A-Steam Generator) Not A-S/G B-S/G'OTAL Sizeable 0-25% 26"50% 51-75% 76-100% TOTAL March 1979 0, (0) December 1979 (0) April 1980 19, 1 (0) 31 November 1980 (0) April 1981 (0) 14 February 1982 (0) 13 October 1982 27 7(1) 16 59 April 1983 11(3) 3(1) 15 15 (4) 51 March 1984 5, 0 0(1) March 1985 23 9(1) 27(1) (2) 3(2) 9(Z) 1 14(1) 25 (5) 52 Totals 91(5) Z6(3) 40(l) 64(3) 92(1) (13) 313 TABLE III The cause of the inlet tubesheet crevice corrosion indication is intergranular attack and stress corrosion cracking of the mil-annealed Inconel 600. This form of corrosion is the result of the tubesheet crevices having 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 <<20% TWD (Through Wall Dimension) wastage type condition exists just above the tubesheet secondary face. A sm'all percentage of the tubes, generally toward the center of the bundle, have this condition. Several of these tubes did have penetrations >ZOYo TPD and Z tubes in the "B" steam generator and 1 tube in the "A" steam generator had a potential >40% TWD as interpreted from the signal. Therefore these three tubes were sleeved. 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 pr obable 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. A more extensive condition noted in the steam generators, primarily on the inlet side, is the minor denting at the tubesheet secondary face.. 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. No tubes were found which obstructed the passage of a 0.7ZO" O.D. probe. In general, minor distortions of most of the tube support plate signals were seen. The denting phenomenon and minor distortions at the tubesheet and support plates can be attributed to secondary side corrosion product build-up in the annular region between the tube O.D. 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" 5 "B" steam generators in'nd around tube R23-C46. A review of previous years data revealed these indications to be present. They appear as a shallow ID indication <20% which were confirmed visually to be an expansion of diameter within the tubesheet. This was caused by a cam-loclc expansion device which was used in earlier years to suspend lead blankets from the tubesheet primary face. In summary, the "A" Steam Generator had five (5) tubes that were found to have tubesheet crevice indications and one (I) tube had an area of previously detected wastage that exceeded the repair limit in the inlet. The "B" Steam Generator had fifty-two (52) tubesheet crevice indications and two (Z) tubes had areas of previously detected wastage that exceeded the repair limit in the inlet. One tube in the "A" Steam Generator had two (Z) indications at the third and fourth anti-vibration bar intersections. These indications were greater than Z0% but less than the repair limit. This tube will be re-examined at the next inspection to determine if there is an active fretting wear damage mechanism going on. In light of the fact that only this tube is exhibiting these indications, it is unlikely that fretting should be of a great concern. CORRECTIVE ACTION Table IV 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. Other than crevice indications, only three tubes exceeded the repair criteria. One 46% TWD indication was found 1.8" above the secondary side face of the hot leg tubesheet of the "A" steam generator tube R19-C50. A 42% TWD indication was found Z.3" above the secondary side face of the hot leg tubesheet, along with a 49% TWD indication was found 1.4" above the secondary side face of the hot leg tube sheet of the "B" steam generator, tubes R23-CZ4 and R22-CZ9, respectively. Three CE mechanical plugs which were installed in B-S/G in 1985 were pulled and inspected full length with the following results: R19-C34 revealed a 72% TWD - 8.3" from the top of the secondary side tubesheet face, R21-C42 revealed a'7% TWD - 9.9" from the top of the secondary side tubesheet face, R21-C55 revealed an 83% TWD - 5.6" from the top of the secondary side tube sheet. All six of the above-mentioned tubes were sleeved "with Combustion Engineering 27" Sleeves and will remain in service. Table V has been generated to maintain a complete history of total tubes inspected total defects detected, and number of tubes requiring repair. TABLE 4 1986 CORRECTIVE ACTIOtlS "A" S G INLET ROW COL LOCATION CORRECTIVE ACTION 22 20 UDS (IGA) HTS - 17.2 CE SLEEVE 21 21 72 HTS - 18.9 CE SLEEVE 20 22 UDS ( IGA) HTS 14.9 CE SLEEVE 11 37 13 HTS 16.5 CE SLEEVE 19 50 46 HTS + 1.8 CE SLEEVE 7 78- 8 (SCC) HTS - 17.9 CE SLEEVE "B" S G INLET ROW COL 1986% LOCATION CORRECTIVE ACTION 3 62 HTS " 17.5 CE MECH PLUG 3 83 HTS 18.0 2 6 56 HTS 17.3 CE tlECH PLUG 11 6 97 HTS - 16.7 CE MECH PLUG 9 9 84 IITS - 16.3 CE MECH PLUG 18 10 59 HTS 16.9 CE MECH PLUG 6 11 UDS ( SCC) HTS - 19.1 CE MECH PLUG 7 13 65 HTS - 17.3 CE SLEEVE 6 15 72 HTS - 7.1 CE SLEEVE 29 15 71 HTS 19 ' CE MECH PLUG 16 17 78 HTS 15.3 CE SLEEVE 18 19 19 (SCC) HTS - 17.5 CE SLEEVE 30 21 88 HTS " 17.3 CE MECH PLUG 23 SQR HTS - 16.0 CE SLEEVE 23 27 HTS 14.1 32 23 64 HTS 16.2 CE MECH PLUG 23 24 42 HTS +, 2.3 CE SLEEVE KEY HTS HOT LEG TUBESHEET SECONDARY FACE CE MECH PLUG, COMBUSTION ENGINEERING MECHANICAL PLUG (REMOVABLE) CE SLEEVE COMBUSTION E11GINEERING 27" WELDED SLEEVE SQR MULTIPLE STRESS CORROSION CRACKS (SQUIRRELS) - NOT QUANTIFIABLE UDS UNDEFItlED SIGNAI. IGA INTERGRANULAR ATTACK DEFECT SCC STRESS CORROSION CRACK DEFECT DRT DISTORTED ROLL TRANSITION SIGNAL ASTERISK DENOTES TUBE PLACED BACK IN SERVICE BY REMOVAL OF PREVIOUSLY ItlSTALLED CE MECH PLUGS AND THE INSTALLATION OF A CE SLEEVE TABLE CON'T 1986 CORRECTIVE ACTIONS G INLET RON COL 1986% LOCATION CORRECTIVE ACTIOtt 2 27 UDS (IGA) HTS 18.5 CE MECH PLUG 22'9 29 49 HTS 1.4 CE SLEEVE 33 69 HTS 18.5 CE SLEEVE 19 34 72 HTS 8.3 CE SLEEVE 29 34 83 HTS 18.2 CE SLEEVE 38 36 UDS (IGA) HTS 18.1 CE MECH PLUG 37 (IGA) 18.4 CE SLEEVE 5 6 '7 UDS 85 EITS HTS 17.9 CE SLEEVE 35 37 84 HTS 18.4 CE tkECH PLUG 35 38 SQR HTS 18.3 CE MECH PLUG 36 38 UDS ( IGA) HTS 17.0 CE MECH PLUG 36 38 92 HTS 19.2 38 38 UDS (DRT) HTS 18.9 CE MECH PLUG 31 39 UDS (IGA) HTS 17.2 CE SLEEVE 42 39 UDS ( IGA) HTS 16.0 CE IIECH PLUG 19 42 UDS (IGA) HTS 7.9 CE SLEEVE 21 42 77 HTS 9.9 CE SLEEVE 1 43 56 HTS 16.6 CE MECH PLUG 23 46 55 HTS 18.2 CE SLEEVE 27 47 73 HTS 18.0 CE SLEEVE 9 48 77 HTS 17.3 CE SLEEVE ll 49 91 IITS 16.7 CE SLEEVE 21 49 76 HTS 8.2 CE SLEEVE 26 49 89 HTS 18.2 CE SLEEVE 31 49 SQR HTS 18.6 CE SLEEVE 32 49 90 HTS 17.1 CE SLEEVE 7 50 90 HTS 17.4 CE SLEEVE 31 52 85 EITS 16.3 CE SLEEVE 1 53 SQR HTS 17,5 CE MECH PI UG'E 21 55 83 HTS 5.6 SLEEVE 24 58 91 HTS 13.8 CE SLEEVE 38 58 79 HTS 16.9 CE MECH PLUG 38 59 75 HTS 18.0 CE MECH PLUG 38 60 81 HTS 17.4 CE tlECH PLUG 8 69 61 HTS 17.7 CE,SLEEVE 9 70 75 HTS 14.6 CE SLEEVE 30 71 79 HTS 17.6 CE MECH PLUG 21 76 90 HTS 17.4 CE MECH PLUG 22 76'8 70 HTS 17.3 CE tlECH PLUG 3 82 HTS 17.6 CE SLEEVE 2 80 89 HTS 17.9 CE tlECH PLUG 19 80 91 HTS 16.7 CE tlECH PLUG 20 80 94 HTS 16,8 CE tlECH PLUG STEAM GE7KRATOR TUSE INSPECTION AN) CORRECTIVE ACTION HISTORY TOTAL TUBES PRIMARY TO REQUIRING NO. DFFECTS SEC& 5)ARY CORRECTIVE TYPE OF REQUIRING NO.TUBES NO.TUBES NO.TUBES DATE NO. TUBES INSPECTED ~LEIUCEEE. ACTION DETERIORATION REPAIR >40% PLUGGED SLEE~c PULLED COIEÃENT. A B A B A 8 A B A 8 Hot Cold Hot Cold IN FACTORY I I APRIL 1972 1050 0 0 0 0 0 MARCH 1974 3259 515 1098 516 19 0 WASTAGE IQ 0 19 0 NOV. 1974 MARCH 1975 JAN. 1976 1701 2174 430 442 672 1931 53 39 442 0 F 005 A S/0 0.091 B S/0 11 0 2 WASTAGE CRACKING/WASTAGE WASTAGE 45 2 0 0 ll 2 '6 2 0 0 11 2 FEB. 1976 3192 3192 3247 3247 2 WASTAGE 39 2 39 2 APRIL 1975 100 1025 75 0.099 B S/0 15 CRACKING 0 15 0 15 APRIL 1977 2003 268 1525 258 13 I WASTAGE 13 I 13 I JULY 1977 300 0.0'12 B 8/0 5 IO CRACKING 5 JAN, 1978 o.oeo B s/0 8 CRACKING)/WASTAGE 8 APRIL 1978 2049 325 1714 375 . 15 ID CRACKING I 15 I 15 FEB. 1979 2049 325 1714 375 5 CRACKING/WASTAGE 6 2-IGA OEC. 1979 0.007 B S/0 13 11-IGA. 2-WASTAGE 13 I3 APRIL 1980 3139 325 3 'I 82 375 31 "A" PITTING/ 13 I 31 -- -- -- 3 -- (I) E "B" IGA NOV, 1980 3138 325 3151 375 3 IGA (2) MAY 1981 3138 325 3141 400 15 IGA, WASTAGE 16 3 (3) FEB. 1982 3137 525 3,1 40 525 700 B S/G 15 IGA, MECH. OAM Ie l4) SEP. 1982 3138 382 3129 893 32 'GA 28 I 33 APRIL 1983 3137 633 3096 832 78 IGA. SCC 23 74 Ie) MARCH 1984 ,3137 717 3093 953 10 IGA. SCC 9 MARCH =1985 3135 3135 3087 3087 e7 IGA. SCC. WASTAGE 70 2 57 Ie) FEB. 1985 3134 .523 3083 770 54 IGA. SCC. WASTAGE 2, 49 27 5 '30 (7) TOTALS 137 384 'I 28 290 126 201 12 201 4 PERCENTAGES 4~2 11.7 3.9 8.8 3~8 6~ I 3 6~ I ~ I ~ 3 SEE NOTE 7 STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY COMMENTS (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 has 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 thermally 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 indication, 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 Z6 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 tubes were sleeved with 28" brazed sleeves Z4 tubes were sleeved with 22" tubesheet sleeves 1 tube and 2 sleeves were plugged 1 tube R34 C54 was pulled for metallurgical analysis. TABLE V (CON'T) STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY COMMENTS (6) The two tubes identified with IGA in the crevice in the "A" steam generator I inlet were sleeved with ZO" tubesheet sleeves. One indication )409o 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 removeable) 1 tube was explosively plugged 1 tube was sleeved with a 36" brazed sleeve due to the domino effect. (7) 'he five tubes identified with crevice indications in the "A" steam generator inlet were sleeved with Z7" 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 Z7" Sleeves Z7 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. TABLE V (CON'T)