Text

Rev 0 Summary Exam Rept for 1991 Steam Generator Eddy Current Insp
	ML17262A469
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Site:	Ginna
Issue date:	04/25/1991
From:	James Smith, Wachter K; ROCHESTER GAS & ELECTRIC CORP.
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ROCHESTER GAS AND ELECTRIC CORPORATION 89 EAST AVENUEI ROCHESTER/

NY 14649 MATERIALS ENGINEERING AND INSPECTION SERVICES

SUMMARY

EXAMINATIONREPORT FOR THE 1991 STEAM GENERATOR EDDY CURRENT INSPECTION AT R.

E.

GINNA NUCLEAR POWER STATION REVISION 0 APRIL 25, 1991 PREPARED BY:

DATE:

4 PS Kv'. Wachter Le l III Eddy Current Examiner Materials Engineering and Inspection Services REVIEWED/

APPROVED BY:

DATE:

a~

mat

, Manager, Materials Engineering and Inspection Services 9105090209'10426 PDR ADOCK 05000244 9

PDR

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TABLE OF CONTENTS'.0 2.0 3.0 4.0

5.0 INTRODUCTION

DATA ACQUISITION PROGRAM DATA ANALYSIS RESULTS

SUMMARY

OBSERVATIONS CORRECTIVE ACTIONS 10 31 36

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1.0 INTRODUCTION

The following is a

summary report of the results of the multifrequency eddy current examination performed during the 1991 Annual Refueling and Maintenance Outage at the R.

E. Ginna Nuclear Power Station in Ontario, New York. The examinations were performed in both the "A"

and "B"

recirculating steam generators which are Westinghouse Series-44 design.

Each generator contains 3260 Inconel 600 Mil Annealed U-Bend tubes having an outside diameter of 0.875" and a nominal wall thickness of 0.050".

The purpose of the eddy current examination was to assess any corrosion or mechanical damage that may have occurred during the cycle since the 1990 examination. Particular attention was given to the detection of:

1)

Intergrannular attack (IGA) and intergrannular stress corrosion cracking (IGSCC) within the inlet tubesheet crevice region.=

2)

Intergrannular attack (IGA) and intergrannular stress corrosion cracking (IGSCC) within the outlet tubesheet crevice region (none detected).

3)

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

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4)

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

5)

Pitting and wastage between the tubesheet and first support plate.,

6)

Wear at the antivibration bar to tube intersections in the U-bend region.

7)

Denting at all tube support intersections.

8)

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

9)

Intergrannular attack (IGA) and intergrannular stress corrosion cracking (IGSCC) at the gl tube support plate region on the inlet side (none detected).

10)

Stress corrosion cracking (SCC) at the 56 tube support plate region with dents (none detected).

The examination was performed by personnel from Rochester Gas and Electric (RG&E) and Allen Nuclear Associates, Inc.

(ANA).

All personnel were trained and qualified in the eddy current examination method and have been certified to a minimum of Level I for data acquisition and Level II for data analysis.

In addition, all acquisition personnel, were trained and qualified to site specific procedures and all analysis personnel were trained and qualified to the site specific "Steam Generator, Data Analysis Guidelines

RG&E Ginna Station".

These analysis guidelines were prepared in Page 2 of 56

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accordance with Revision 2 of the Electric Power Research Institutes (EPRI)

"PNR Steam Generator Inspection Guidelines".

The data analysis was performed by two independent teams.

Both teams performed their analysis manually utilizing the Zetec Digital Data Analysis (DDA-4) System.

The results of these two analyses were compared for discrepancies using the ISIS TUBE computerized data management system.

The typical data flow chart is shown on Figure 1

(Page 5).

The following list describes some typical discrepancies between analysis teams requiring resolution by the Level III resolution team.

Any indication that is reported as

>204 by either team and is not reported by the other team or is sized at >104 0

difference.

0 Any indication spanning the repair limit, (394 vs. 414).

Any difference of

>1 inch in the axial location of a flaw.

o Any tube which,was analyzed by one team but not the other.

o Any difference in the reported test extent.

o All indications identified as IGA and/or SCC regardless of whether one or both parties have reported it.

o

'ny tube reported as obstructed by one team but not the other.

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o Any tube for which a retest was requested by one team but not the other.

o AllRoll Transition Indications (DRT/DRI) reported by one team but not the other.

In addition to the above, all tubes requiring repair whether reported by one or both teams were reviewed by the resolution team (usually consisting of two Level III individuals).

In all cases, the removal of a repairable indication from the

'I data base required the concurrence of two Level III individuals.

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Typical Data Flow Chart Data Kanesenent initiate Dale Oaciase Dale n ~IIisltlen Data Kenetenent Ler-ln ant Durllcat ~

lares Kennel Oaalssls Kannat Analosls Data Kanasenent Cenrlrlsea Oil!creases tes Oelveen COI ani Kennel lnllcallens res falllns vithtn

Ãeratr Criteria Resetntlen Data Ken aIe ne n t Ms Current Level ill Oevlen Stein Ceneraler Crenr 3/1/91" Ficiure 1

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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 25 kHz.

The selected frequencies were all operated in the differential and absolute modes.

The examination was performed primarily with a standard 0.740" or 0.720" O.D. bobbin coil probe with smaller diameter probes used to traverse the smaller radius U-bends and dented regions.

Prior to examination of the steam generators, an inspection program was established for the inlet and outlet sides of both the "A" and "B" steam generators.

The inlet or hot leg examination program plan was generated to provide the examination of 100% of each open unsleeved steam generator tube from the tube end to the first tube support, along with 20~o of these tubes being selected and examined for their full length (20% random sample as recommended in the Electric Power Research Institute (EPRI) guidelines).

In addition, 204 of each type of sleeve was examined and the remaining tube examined full length.

All previous tubes with indications greater than 20% through wall (TW) depth were examined as a

minimum to the location of their degradation.

All Row 1 and Page 6 of 56

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Row 2 U-bend regions selected as part of the 20% random sample were examined with the Motorized Rotating Pancake Coil (MRPC) between the g6 TSP H and the N6 TSP C from the cold leg side.

A number of supplemental examinations were also performed to assist in flaw characterization and confirmation and to continue to monitor for the onset of new damage mechanisms.

Table 1 is a

breakdown, by steam generator, of all tubes programmed for examination, numbers examined and to the extent examined.

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STEAM GENERATOR "A 1991 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION Total Tubes Out of Service Sleeved Tubes Open Unsleeved Tubes 3260 172 223 2865 Hot Leg to 51 TSP REQ'D MIN 1852 Previous Ind.

> 204 Sleeves Deplugged Tubes (F/L) 27 45 24 Full Length (20% Random) 573 NUMBER PROGM'D 1852 986 27 56 24 NUMBER INSPT'D 1852 986 27 56 24 COMPLETE2 100.04 172.1~o 100.04 124.44 100. 04 Table 1

'er Appendix B requirement.

Complete

= Tubes Inspected/Required Minimum.

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STEAM GENERATOR >>B 1991 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION Total Tubes Out of Service Sleeved Tubes Open Unsleeved Tubes 3260 316 832 2112 REQ'D MIN Hot Leg to 51 TSP-1267 y

Full Length (204 Random) 423 Previous Ind.

20%

20 NUMBER

'ROGM'D 1267 825 20 NUMBER INSPT'D COMPLETE~

1267 100.04 825 195.0%'0 100.0>o Sleeves Deplugged Tubes (F/L) 167 16 231 16 230 16 137 '4 100.04 Table 1 (Cont'd)

Per Appendix B requirement.

Complete

= Tubes Inspected/Required Minimum.

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3. 0 DATA ANALYSIS.RESULTS

SUMMARY

The data analysis was performed using the Zetec DDA-4 Digital Data Analysis System with Edition 18.6 Revision 5.2 software and MRPC (Revision

14) supplements.

All data was.reviewed by displaying the 400 kHz data on the CRT along with the vertical component of the differential and absolute mix outputs in strip chart form (where applicable).

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

All recordable indications were logged into the computer and stored on floppy disk.

The final report form summarizing all indications

>204 TW (including IGA and PWSCC'which is assumed to be )204) for each generator can be found in Table 2.

An explanation of the abbreviations and nomenclature used on these lists has been compiled for ease of interpretation.

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LIST OF >204 INDICATION AND CREVICE INDICATION NOMENCLATURE To of List Information ROW ROW number from the tube identification.

COL Column number from the tube identification.

IND. DESC.

Type of damage mechanism.

~o TWD VOLTS Percent through wall depth measurable indications.

Amplitude of the measured response.

or code for non-indication signal INDICATION LOCATION Reference point from which the indication was measured along with axial distance from that reference point.

Information Under 4

TWD XX%

The measured percent TW depth of the indication.

Information Under IND. DESC.

ADI Absolute Drift Indication Signal which is indicative of IGA.

ADS Absolute Drift Signal which may be indicative of IGA.

DRT Distorted Roll Transition may be indicative of PWSCC.

DRI Distorted Roll Indication indicative of PWSCC.

SAI

. Single Axial Indication MRPC verified DRT, SCC or ADS MAI Multiple Axial Indication MRPC verified DRT, SCC or ADS SCI

Single Circumferential'ndication CCI

Circumferential Indication on B&W Explosive Plug Page 11 of 56

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LIST OF )20% INDICATION AND CREVICE INDICATION NOMENCLATURE CON'T Information Under INDICATION LOCATION HTE HTS TSP CTE CTS AVB

-XX.X Hot Leg Tube End (Bottom).

Top of inlet tubesheet.

Tube Support Plate Cold Leg Tube End (Bottom).

Top of outlet tubesheet.

Antivibration Bars (Numbered from Hot Leg to Cold Leg).

Axial distance below the secondary face of the tubesheet or support plates where the indication is located.

+XX.X Axial distance above the secondary face of the tubesheet or support plates where the indication is located.

H Hot Leg (inlet side)

C

Cold Leg (outlet side)

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Ginna Station SG/A MAR91 Date:

Page:

04/24/91 1

REPORTABLE INDICATIONS Row Col Ind.

Desc.

4TWD Volts Indication Location 21 21 7

9 9

10 9

13 13 20 7

8 12 18 10 11 13 14 15 17 19 22 38 8

10

~

11 12 14 16 18 7

9 15 15 16 17 17 18 18 19 19 19-19 20 20 20 20 21 21 21 21 21 21 21 21 21 21 22 22 22 22 22 22 22 DRT MAI ODI SCC DRT SAI DRT SAI ADS WAS WAS WAS ADS ADI ADI DRI DRI WAS SCC WAS WAS WAS ADS SCC SCC ADI WAS WAS WAS WAS WAS WAS WAS ADS WAS ADS WAS WAS WAS SCC SCC MAI WAS ADS ODI WAS WAS WAS WAS WAS WAS WAS WAS 224 95>o 204 204 464 214 854 244 23%

224'4%

80>o 264 31%

32>o 224 25%

214 264 254 33%

234 304 804 94<

204 264 274

~

214 22%

254 224 224'64 234 2.62 1.30 2.57 0.53 2.54 1.24 2.98'.03 3.94 0.80 0;41 0.36 2.67 1.31 2.15 6.01 4.38 0.84 1.26 "2.45

3. 63 2.85 1.51 0.29 0.26, 0.53 4.47 4.95 1.65 1.77 6.54 4.45 1.19 3.56 1.83 3.56 1.03 5.94 3.86 0.34 0.85 0.50 0.60 1.69 3.28 0.90, 2.77 3.70 3.36 5.35 2.45 0.87 1.74 HTS HTE 52 AVB HTS HTS HTE HTS HTE HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS g3 AVB HTS HTS HTS HTS HTS HTS HTS HTS 19.5 2.2 0.0 18.6 19.5 3.0 19.6 2.5 9.8 1.7 0.8 1.2 14.6 2.6 15.1 19.3 19.6 F 1 19.1 2.5 1.9 2.1

18. 5 17.5 17.9 3 .6 2.1 2.1 1.2 2.0 2 '1.8 10.9 1.5 10 '1.9 1.3 1.0 17.9 18.3 3.2 0.8 12 '0.0 1.5 3.0 2.5 2.2 2.2 1.6 1.2 0.3 TABLE 2 Page 13 of 56

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Ginna Station SG/A MAR91 REPORTABLE INDICATIONS Date:

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04/24/91 2

Row Col Ind.

Desc.

4TWD Volts Indication Location 23 22 10 23 13 23 14 23 23 23 7

24 10 24 11 24 12 24 13 24 22 24 23 24 26 24 27 24 7

25 8

25 12 25 13 25 14 25 17 25 24 25 6

26 9

26 21 26 23 26 24 '6 25 26 17 27 18 27 22 27 WAS WAS WAS WAS WAS WAS WAS WAS WAS DRT MAI WAS WAS WAS WAS WAS WAS WAS WAS WAS ADS ADI DRT MAI DRT SAI WAS WAS WAS WAS WAS ADS ADI ADI ADI DRT MAI WAS WAS SCC SCC WAS DRI WAS WAS WAS ADS WAS SCC WAS WAS WAS WAS 2 2~o 35%

204 27>o 234 24%

214 364 204 24>

24%

204 214 254 20>o 22~o 254 334 28%

20>o 294'74 214 684 564 2

04'0%

28%'44'14 95>o 274 324 41%

274 2.16 1.40

1. 17 13.98 4.62 6.80 2.51 1.54 0.74 1.88 1.00 2.78 1.73 0.82 7.35 7.88 4.36 2.62 3.29 2.25 4.12

0. 64

2. 1'4

1. 48 1.97 1.89 6.17 7.95 12.69 4.39 11.00 1.55 0.31 0.56 0.54 1.50 1.07 6.25 6.15 1.54 0.96 5.76 3.71 5.76 2.09 0.73 2.01 1.94 1.01 7.59 10.67 1.18 13 '7 HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTE HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTE HTS HTS HTS HTS

'TS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS 0.6 2.0 1.2 3.0 2.0 2.9 2 '1.6 1.4 19.4 2.4 1.9 2.8 1.4 2.8 2.8

'1.1 1.3 0.8 15.5 3.3 19.4 2.1 19.4 1.8 2.2 2.5 2.6 2.9 2.3 8.5 13.5 19.5 5.0

19. 1 2.0 0.7 2 '

16.5 15.2.

2.0 19.4 2.0 1.7 2.5 15.0 1.4 18.7 2 '2.8 3.1 2.4 TABLE 2 Page 14 of 56

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Ginna Station SG/A MAR91 REPORTABLE INDICATIONS Date:

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04/24/91 3

Row Col Ind.

Desc.

~o TWD Volts Indication Location 24 25 2

7 23 24 15 24 27 15 23 24 25 16.

17 23 24 26 27 34 14 20 22 23 24 26 28 30 34 21 22 23 24 25 w

27 27 28 28 28 28 29 29 29 30 30 30 30 31 31 31 31 31 31 31 32 32 32

32 32 32 32 32 32 33 33 33 33 33 33 WAS WAS DRT SAI DRI WAS WAS WAS WAS SCC DRI WAS WAS WAS WAS WAS ADI SCC SCC DRI MAI WAS WAS WAS ODI WAS DRT MAI ADS WAS WAS WAS WAS WAS WAS WAS WAS ODI DRI DRT MAI DRT SAI SCC WAS WAS WAS WAS WAS WAS

'AS WAS WAS 264 21>o 254 21%'6>o 214 824 234 304 27~o 234 214 194 11%

32>o 354 27~o 20>o 2 1~o 35~o 334 30%

31>

314 234 254 224 254 10%

224 264 214 25~o 274 294'44

'2%'34 6.22 5.52 2.89 0.50 1.98 5.31 8.20 6.53 4.96 0.52 3.66 2.14 6.14 3.33 9.28 2.37 1.35 0.40 0'2 9.02

2. 27 6.83 11'6 6.43 3.72 1.00 3.80 0.58 3.70 1.29 5.58 13 '2 4.46 10.19 2.95 11.13 3.77 1.84 4.80 3.04 0.77 3.45 1.12 12.54 3.18 5.03 3.07 12.34 2.99 8.33 5.82 8.40 2.83 HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS CTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS CTS HTS HTS HTE HTS HTE HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS 1 ~ 1 0.8 19.4 2.8 19.6 2.2 1.4 3.0 1.4 8.9 19.4 2.0 1.4 1.6 1 '1.0

16. 1 4.9 5.9 19.4 2.7 2.4 1.8 1.4 1.4

.0.9 19.7 1.6 4.1 2.5 2.8 2.1 1.5 2.5 2.0 1.5 0.5 0.7

19. 5

19. 5 2.2 18.8 2.8 1.3 1.6 2.1 1.2 2.2 1.4 2.4 1.9 1.6 1'7 TABLE 2 Page 15 of 56

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Ginna Station SG/A MAR91 REPORTABLE INDICATIONS Date:

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Row Col Ind.

Desc.

wTWD Volts Indication Location 18 34 19 34 20 34 21 34 23 34 25 34 27 34 1

35 7

35 17 35 18 35 19 35 20 35 21 35

'2 35 23 35 25 35 26 35 27 35 39 35 20 36 21 36 22 36 26 36 17 37 18 37 21 37 22 '7 24 37 25 37 WAS WAS ADI WAS WAS WAS WAS WAS DRI SCC WAS WAS DRI DRT

,SAI SAI DRT ADI ADI WAS WAS WAS WAS WAS WAS WAS WAS WAS WAS ODI ODI WAS WAS WAS WAS WAS WAS WAS WAS WAS WAS WAS OD1 WAS SCC DRI WAS WAS WAS WAS WAS WAS WAS 214 274 294 384 324 214 214 77%

224 204 294 234 24%

21%

224 27%

22>o 22%

25%'04 304'4%

234 224 334 29%

214 28%

23%

21%

274 244 22~

254 82~o 334 274 234 204 214 224'94 3.66 2.16 5.48 1.95 1 ~ll 3.21 0.72 7.37 3.29 1.81 9.03 3.41 7.27 2.62 1.58 1.21 2.45 7.36 3.99 1.67 0.82 1.88 7.30 3.02 6.66 6.89 6.83 0'1 2.61 2.18 4.20 1.68 1.59 3.38 2.19 1.89 2.77 6.67 0.71 1.46 1.95 2.02 1.60 9.30 7.21 7.21 0.83 1.75 6.25 3.15 7.71 5.58 9.52 HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS 54 AVB C3 AVB HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS CTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS 1.3 0.8 9.1 2.4 3.0 2.0 3.0 2.1

19. 6 17.8 1.6 0.4 19.2 19.5 2 ~ 7 2.2 19.4 3.4 8.4 2.4 2.1 2.4 2.2 1.0 1.4 2.4 1.5 2.6 1.4 0.0 0.0 2.8 1.7 2.2 1 ~ 7 2.0 2.1 1.4 3.7 4.7 2.8 3.3 2.7 1.8

19. 5

19. 5 2.1 1 ~ 3 1.6 2.8 2.2 2 '1.2 TABLE 2 Page 16 of 56

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Ginna Station SG/A MAR91 REPORTABLE INDICATIONS Date:

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04/24/9 1 5

Row Col Ind ~

Desc.

+oTWD Volts Indication Location 26 37 28 37 40 37 16 38 20 38 23 38 24 38 25 38 26 38 11 39 18 39 19 39 20 39 22 39 25 39 26 39 28 39 14 40 17 40 18 40 21 40 23 40 26 40 27 40 28 40 7

41 8

41 14 41 WAS WAS DRT MAI DRT MAI SCC WAS WAS WAS WAS WAS DRT WAS WAS SAI WAS WAS WAS WAS ADS WAS ODI ODI WAS WAS WAS WAS WAS WAS WAS DRT SAI DRT SAI DRI WAS WAS ODI WAS WAS WAS WAS WAS WAS DRT SAI DRT SAI DRI WAS SAI SCC 254 234 574'74 244'44 244 214 254 324 234 27%

25%

304 244 55%

234 2lo 244 22>o 224 20<

234 22~o 294 244 20%

304 20%

23~o 25%

234 204 244 904 5.20 3.83 2.97

1. 13 1.97 0.61 0.54 1.39 1,79 2.07 1.77 3.00 2.50 1.05 7.08 2.03 4.91 6.63 5.75 3.15 1.20 2.16 0.60 4.52 1.47 1.87 6.91

1. 68 10.21 3.37 4.42 2.29 1.28 1.83 1.34 5.33

.2.08 2.25 6.16 0.95

.3.82 7.48 6.35 7.23 6.26 3.34 2.42 4.36 0.78 5.12 0.96 1.89 0.38 HTS HTS HTS HTE HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS CTS CTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTE HTS HTS HTS CTS HTS.

HTS HTS HTS HTS HTS HTS HTE HTS HTE HTS HTS HTE HTS 1.4 1.9 19.5 2.9 19.5 2.3 11.4 1.8 2.4 2.9 1.9 1.9 19.6 0.8 1.3 2.8 1.2 2.3 1 ~ 6 2 ~ 1 16.7 2.6 3.0 2.3 1.1 1.6 2.2 2.5 1.6 1.9 19.6 3.0 19.5 2.2 19.9 2.0 2.6 1.9 2.7 2.5 2.1, 2.5 2.1 2.1

19. 7 2.8 19.7 2.5 19.. 8 0;4 2.6

18. 5 TABLE 2 Page 17 of 56

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Ginna Station SG/A MAR91 Date:

04/24/91 Page:

6 REPORTABLE INDICATIONS Row Col Ind.

Desc.

STWD Volts Indication Location 18 41 24 41 25 41 26 41 28 41 29 41 30 41 22 42 24 42 25

,42 26 42 27 42 29 42 37 42 10 43 14 43 18 43 24 43 25 43 27 43 28 43 15 44 22

'44 27 44 28 44 29 44 12 '5 13 45

- 21 45 23 45 25 45 27 45 SCC WAS WAS WAS WAS WAS WAS WAS WAS WAS DRI WAS.

WAS WAS DRT MAI WAS WAS WAS WAS WAS

'WAS WAS WAS ODI ODI ODI WAS SCC WAS WAS WAS WAS WAS WAS WAS SCC DRI SCC ADI WAS WAS WAS

WAS, WAS WAS WAS WAS WAS WAS

.WAS WAS WAS 47%

22%'94'74 20<

24%

284 264 284'34 284 234 29>o 25>o 214 23%

25<o 314 214 27%

284 344 264 244 75>o 214 33>o

.26%

20%

29>o 33>o 234 914 88%

214 21%

254 28%

3 l~o

354, 344 214 214 334 204 304 24%

0.32 1.22 1.67 8.40 3.83 3.52 4.18 1.65 3.85 3 '7

,4. 06

4. 13 2.26 2.20 3.10 0.99 1.12 2.08 6.93 6.71 2.81 3.72 2.93 1.67 3.78 5.16 3.23 0.53 0.70

'3. 10 2.90 4.69 1.89 5.03 8.. 52

4. 08

0. 63 2.97 0.45 0.57 2.63 6.26 5.59 9.44 3.88 9.60

'.47 2.36 3.28 0.67 6.85 7.57 7.80 HTE HTS HTS

.HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS

¹3

¹4 HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS AVB AVB AVB 3.5 2.1 1.8 1.9 1.1 0.9 1.9 1.6 2.3 2.0 19.6

+

1.4

+

2.5

+

1.9 19.6 2.8 0.7 2.0 1.7 1.8 1.2

+

1.8

+

1 ~ 3

+

1.0 0.0 0.0 0.0 1 ~ 2 8.3 2.9 2.6 0.9 1.7 1.8 2.2 0.9 2.4 19.5 3.4 5.2 1 ~ 3 2 '1.3 2.1 0.8 1.2 2.0 1.8 1.3 0.7 1.3 1.0 2.1 TABLE 2 Page 18 of 56

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Ginna Station SG/A MAR91 REPORTABLE INDICATIONS Date:

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04/24/9 1'7 Row Col Ind.

4TWD Desc.

Volts Indication Location 28 45 29 16 25 26 6

13 18 21 30 3

16 45 46 46 46 47 47 47 47 47 48 48 17 20 28 30 42 2

14 16 17 19 21 26 28.

31 16 17 18 23 48 48 48 48 48 49 49 49 49 49 49 49 49 50 50 50 50 25

'7 29 37 19 21 23 50 50 50 50 51 51 51 24 50 SAI WAS DRT WAS WAS WAS SCC WAS WAS DRX DRI WAS DRI WAS ADI SCC ADI ADI WAS SCC SCC WAS WAS ADS ADI ADI ADX WAS WAS ADI ADI DRI MAX WAS WAS WAS SAI DRT ODX WAS WAS WAS WAS MAI DRT MAI ADS WAS WAS ODI WAS SCC SAI 20%

22~o

-23%

214 824'04 35>o 204 264 674 224 78>

234 31>

214'04 214 29<

28<

20>o 204 22%

254 31%

244 29%

28%

254'6>o

l. 25 3.53 4.24 6.26 10.60 1.68

l. 13 8.51 8.36 6.03 3.61 1.64 2.98 8.75

l. 67 0.48 0.70 0.78 0.71 0.23 0.37 11.51 6.83 2.19 2.81 0.30 5.33 1.57 0.79 5.34 5.73 F 10 9.09 5.87 10.06 8.50 2.69 4.05 1.23 1.59 0.83 0.73 1.07 1.06 4.90 2.28 2.38 3.92 5.31 3.88 7.16 0.51 1.10 HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTE HTS CTS HTS HTS HTS HTS HTE HTS HTE HTS HTS HTS 03 AVB HTS HTS HTE 2.2 0.9 19.5 1.9 1'. 2 2.4 5.0 1.2 1.3 19.4 19.6 2.7

.19. 6 0.9 17.6 15.0 5.9 14.5 0.5 7.1 7;0 1.1 1.0 16.2 13.4 5.6 4.5 4.6 3.7 4.2 15.0 19.4 2.0 1.6 0.5 1.5 1.9 19.5 1.9 0.7 1.7 0.7 1.9 2.9 19.5 2.2 15.7 1.8 0.9 0.0

~ 1.5

16. 0 2.2

.TABLE 2 Page 19 of 56

C I

Cz h

~ H lf

R.

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E.

Ginna Station SG/A MAR91 Date:

Page:

04/24/91 8

Row Col REPORTABLE Ind.

%TWD Desc.

INDICATIONS Volts Indication Location 28 30 45 13 17 23 45 16 17 19 24 29 11 14 16 17 28 13 16 17 18 21 8

9 16 17 23 24 28 29 18 19 51 51 51 52 52 52 52 53 53 53 53

'54 54 54 54 54 55 55 55 55 55 56 56 56 56 56 56 56 56 56 56 56 57 57 WAS SAI DRT ADS ADS WAS SCC SCC ADI DRT MAI DRT SCI PUL PUL ODI WAS WAS WAS WAS WAS WAS DRT MAI WAS WAS ODI WAS WAS WAS WAS WAS DRT SAI SAI SAI SCC DRI SAI DRI SAI WAS ADI WAS ADS ADI ADI SAI DRI WAS WAS'DI SCC 254 254 82>

29~a 1004 1004 264 22>o 21%'94 2 1>o 20~o 24%

204 244'24 224 20>o 214 334 29%

894 204'0~o 204 264 884 4.21 2.47 4.87 3.98 3.94 4.51 0.85 0.29 0.92 3.04 4.26 16.00 6.02 999.90 999.90

1. 52

1. 17

1. 36 1.85 2.19 0.60 4.51 6.14 2.04 0.70 3.58 1.04 2.80

1. 65 5.84 1.10 0.94 2.98 1.05 1.53 4.36 0.44 4.23 2.25

4. 19 3.06 1.03 3.16 1.32 3.00 0.76 0.65 2.97 10.90 3.54 7.21 5.04 0.65 HTS HTE HTS CTS CTS HTS HTS HTS HTE HTS HTE HTE HTE g6 T HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS CTS HTS HTS HTS HTS HTS HTS HTE HTE HTE HTS HTS HTE HTS HTE HTS HTS HTS HTS HTS HTE HTE HTS HTS HTS HTS HTS SP SP C

H 1.3 2 '

19.4 3.6 2.7 1.7 17.0 12.1 3.3 19.6 3.3 2.0 2.5 1.8 0.4 5.2 4 ~ 4 3.1 2.1 1.6 3.1 0.6 19.8 2.9 2.9 3.9

.1.4 1.4 1.4 4.2 4.2 2.4 19.3 3.3 2.6 2.2 18.6 19.2 2.8 19.5 3.0 0.7 15 F 1 3.9 10.6

12. 1 6.5 2 '

19.3 1.0 0.8 17.4 18.7 TABLE 2 Page 20 of 56

k P'4 Ww Qe

'I L'

F tl Fq Vg, C

t%

R.

G.

E.

Ginna Station SG/A MAR91 REPORTABLE INDICATIONS Date:

Page:

04/24/91 9

Row Col Ind.

Desc.

4TWD Volts Indication Location 21 22 23 28 17 19 20 24 27 15 24 25 27 31 8

9 19 20 23 9

13 16 17 19 20 21 38 14 15 18 19 20 27 15 16 17 18

'9 20 38 9

10 57 57 57 57 58 58 58 58 58 59 59 59 59 59 60 60 60 60 60 61 61 61 61 61 61 61 61 62 62 62 62 62 62 63 63 63 63 63 63 63 64 64 DRI WAS WAS SAI DRT WAS WAS WAS WAS DRI WAS WAS WAS MAI DRT DRT MAI ADI WAS WAS DRT WAS WAS WAS WAS WAS WAS WAS WAS WAS WAS WAS WAS WAS DRI WAS WAS WAS WAS WAS WAS DRT MAI WAS WAS WAS WAS WAS WAS WAS ADS WAS WAS 29%

254'04 224'44 254 254 224 204 27%

224'64 204 254 20%

27>o 204 324'04 274 234 29%

204 20%

20%

2 3~o 204 244 264 204 204 214'24 33%

24~o 224 20%

214 6.85 9.78 3.56 1'7 4.08 1.65 7.51 1.52 3.58 8.33 6.20 3.25 2.78 2'2 4.63 4.03 1.29 3.30 0.98 8.42 2.80 0.98 2.09 0.63 2.86 0.66 2.57 2.24 3.13

.1 ~ 17 5.23 4.96 3.84 2.46 3.30 6.15 7.11 3.32 0.99 7.01 3.95 2.21 1.84 5.83 2.95 9.74 4.93 1.19 7.37 0.87 2.45 2.60 4.61 HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS

19. 5 1.4 1.4 2.4 19.4 2.4 1.8 1.9 1.8 19.4 2.5 1.6 1.7 2.2 19.3 19.2 2.6 17.2 0.4 1.6 19.5 1.7 1.0 1.2 1.3 1.0 0..7 F 7 1.4 1.9 1 ~

4'.5 1.6 1.5 19.5 1.8 1.9 1.5 1 '2.0 1.3 19.6 2 ~ 1 1.6 1.5 1.5 1.5 1.0 1.5 1.6 11.5 0.

6'.7 TABLE 2 Page 21 of 56

I 1

i Tg

<~i i4 F

R.

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E.

Ginna Station SG/A MAR91 REPORTABLE INDICATIONS Date:

Page:

04/24/91 10 Row Col Ind Desc.

RTWD Volts Indication Location 13 14 16 17 19 20 31 8

9.

10 11 13 15 16 22 2

10 11 13 14 15 18 19 20 21 1

9 ll 14 19 27 38 8ll 13 19 9

64 64 64 64 64 64 64 65 65 65 65 65 65 65 65 66 66 66 66 66 66 66 66 66 66 67 67 67 67 67 67 67 68 68 68 68 68 69 WAS WAS WAS WAS WAS ADI WAS WAS DRT SAI SCC SCC WAS WAS WAS WAS WAS WAS WAS DRT SAI WAS WAS WAS WAS WAS WAS WAS WAS WAS WAS DRT SAI WAS WAS DRT WAS WAS SAI DRT WAS DRT SAI ODI ODI SAI DRT WAS WAS WAS ADS WAS DRI 244 224 204 234'6%

224 22%

704 21'4~o 22>o 274 20<

204 20%

20>

23%

21>o 274 274 264 204 254 26%

25<

264 2 9~o 26>

25<

254 294 244 224 254 294

l. 14 6.32 1.31 6.64 5.20 3.62 9.66 1.93 4,53 1.03 0.48 0.31 6.53 4.20 1.64 3.66 2.96 1.75 0.97 4.22 1.77 4.37 2.05 2.97 8.22 3.86 6.15 6.05 10.86 1.26 2.55 3.81

l. 17 3.05 2.71 2.72 4.29 2.85 1.92

'2.68 3.05 3.66 1.54 3.00 3.94 1.57

1. 17 2". 08 3 '2 3.63 5.40 3.65 7.64 HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTE HTS HTS HTS HTE

¹3

¹4 AVB AVB HTE HTS HTS

~ HTS HTS HTS HTS HTS 2.0 1.6 1.8 1.5 1.5

14. 8 1.6 1.0 18.6 1.8 18.9 3.5 0.5 0.4 0.8 1.2 1.6 1.2 1.3

19. 6 2.6 0.9 0.5 1 ~ 0 1 ~ 3 1.8 1.6 1 ~ 7 1.7 1.1 1;6 19.4 2.0 1.4 0.7 19.4 0.9 1.3 2.6 19.5 2.0 19.5 2.0 0.0 0.0 1.8 19.5 1

3 1.6 1.6 17.8 1.2 3.9. 2 TABLE 2 Page 22 of 56

T i

4 e

T'

R.

G.

E.

Ginna Station SG/A MAR91 REPORTABLE INDICATIONS Date:

Page:

04/24/91 11 Row Col Ind.

4TWD Desc.

Volts Indication Location 12 9

11 14 38 6.

17 21 12 16 8

12 17 8

25 2,8 30 31 12 27 29 7

13 11 16 18 1ll 69 70 70 70 70 71 71 71 72 72 73 73 73 74 74 74 75 75 77 77 78 81 82 83 85 87 87 89 91 WAS SAI WAS DRT WAS

. WAS ODI WAS WAS ADI WAS SAI DRT WAS WAS ADI WAS DRT SAI ADI DRT MAI DRT SAI SCC DRT SAI DRT MAI ADS SCC DRT SAI DRT SAI DRT ODI ADS ODI WAS 214 28%

234 224 234:

244 254 244 254 26%

264 76%

764 344 304 234 7.05 3'2 5.07 2.96 5.23 5.14 2.76 6.52 2.

63'.20

'3.49 1.43 2.93 1.78

10. 60 1.44 3.89 3.98 3.75 2.82 4.52 4.00 4.80 1.80 1.02 4.89 1.98 6.10

2. 13

4. 11 0'2 3.67 3.22 3.60 1.78 3.35 0.91 1.92 0.38 3.08 HTS HTE HTS HTS HTS HTS

$ 2 AVB HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTE HTS HTS HTE HTS HTE HTS HTS HTE HTS HTE CTS HTS HTS HTE HTS HTE HTS HTS HTS HTS HTS 1.5 2.0 1.3 19.5 1.3 1.9 0.0 0.7 0.7

18. 2

+.

1 ~ 2

+

2 ~ 1 19.7 1.0 1

3

18. 2 0.8

19. 6 1.9

18. 7

19. 6 1.8 19

~ 6 2.0 16.2 19 '2.0 19.7 1 '2.6 19.1 19.6

'.5 19.5 2.0 19.8 12.0 9.0 11.0 1.1 NO OF TUBES:372 NUMBER OF INDICATIONS: 570 SCC SCC SCC SCC 76-1004 51-754 26-504 1-254 ADI 20-6 1

4 30 Page 23 of 56

P lg t

rs

)>" '

R.

G.

Row E.

Col GINNA STATION SG/B MAR91 REPORTABLE INDICATIONS Ind.

4TWD Volts Desc.

Date:.04/23/91 Page:

1 Indication Location 5

11 18 14 18 24ll 7

~

11 17 2

25 11 18 6

27 7

2 8

11 7

11 14 15 24 1

10 11 13 17 33 12 16 24

'7 29 16 17 8

10 11 12 12 13 13 14 14 16 16 17 20 22 22 23 23 23 23 23 24 24 24 24 24 24 25 25 25 25 25 26 26 ADI DRT ODI ODI ADI ODI ODI ADS SAI ODI

. DRI SCC SAI DRT DRT MAI ADS DRT DRI ADS ADI SCC WAS ADI WAS WAS WAS WAS WAS WAS WAS WAS ADS WAS WAS DRT WAS DRI SCC MAI SAI SAI SCC ADS ADI DRI WAS WAS WAS SCC DRI WAS WAS 284 284 29>o 334 274 90>o 954 20%

274 224 234 244 30%

26%

284 23>o 204 23>o 23>

794 92~o 36%

334 344 844'6<

274 2.54 2.83 2.36 2.23 2.38 1.66 2.12 1.59 0.51 2.83 4.01 0.34 0.59 3.00 3.99 0.69 0.93 2.77 4.69 1.76

2. 19

1. 50 3.40

.2. 39 0.83 9.32 2.41 7.95 4.04 0.51 1.58 0.62 1.44 5.56 0.60 1.43

6. 17 2.06 0.46 0.52 0.89 0.90 3.15 4.86 1'7 2.01 3.39 5.27 5.39 1.02 1.62 5.15 3.01 HTS HTS g1 TSP C

51 TSP C

HTS g1 TSP C

g2 TSP C

HTS HTE g1 TSP C

HTS HTS HTE HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTE HTE HTS HTS HTE HTS HTS HTS HTS HTS HTS

. HTS HTS 17.8 19.4 0.1 0.0 13.

7'.0 0.0 17.7 4.0 0.0 19.3

'8.

1 3.2 19.3 19.2 2.6 18.0

19. 1

19. 5

18. 0

'17. 2

18. 4 1.1 17.6 1.5 1.3 1.8 1.6 1.1 1.9 1.0 1.3 2.2 1.3 1.4 19.5 1.3 19.4

14. 1 4.3 14.4 7 '

18.6 17.0 4.5 19.6 1.1 0.6 0.9 18.7 19.2 1.7 1.7 TABLE 2 Page 24 of 56

~

P'a lk P

R.

G.

E.

GINNA STATION SG/B MAR91 REPORTABLE INDICATIONS Date:

Page:

04/23/91 2

Row Col Ind.

4TWD Desc.

Volts Indication Location 18 19 20 22 13 14 17 23 15 28 2

19 26 29 11 17 31 25 39 42 9

19 43 20 40 9

'12 23 25 26 3

26 32 33 57.

26 26 26 26 26 27 27 27 27 28 28 29 29 29 29 30 30 30 31 31 31 32 32 32 33 33 34 34 34 34 34 35 35 35 35 37 37 37 WAS WAS WAS WAS WAS WAS WAS WAS ADS ADS SAI WAS ADI SCC ADS SAI WAS SCC SAI SCC DRI ADS WAS DRT SAI WAS SCC ODI ADS SCC SCC SCC CCI ADS SAI SCC ADI SCC MAI ADI WAS WAS ADS SCC SAI ADS MAI SCC

SAI, OBS ADS DRT MAI 27>o 334 334 21%

344'5%

22%

224 70>o 20%

344'04 28~o 234 79%

31%

864 584 544 984'04'1%

204 54%

654

8. 60 5.63 15.49 13.56 7.02 1.06 5.39 5.80 4.78 3.17 0.40 6.22 3.03 0.57 2.06 0.24 14.33 0.26 0.54 0.55 4.76 5.93 1.18 3.71 1.35 1.15 1.87 3.72 1.86 2.61 0.38 0.60 0.11 5.38 0.23 1.69 5.65 0.36 0.62 2.00 0.61 0.59 1.52 0.21 0.44 2.01 0.39 0.44 0.76 0.00 3.67 6.45 0.98 HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTE HTS HTS HTE HTS HTS HTS HTS HTS HTE HTS HTS CTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTE HTS HTE HTS HTS HTE 1.1 1.5 1.4 1 ~ 3 1.2 1.4 1.1 1 ~ 1 6'. 8 17. 4 4. 3 1 ~ 7 6. 0 10. 3 15

~ 9 5. 8 1. 4 14. 4 7. 4 18. 4 19. 1 17. 0 2 ~ 1 19. 6 2. 7

- 1. 5 18. 4 15. 1 15. 0 19. 2 14. 6 11. 9 3. 0 10. 0 1 1. 5 19. 0 15. 0 7. 0 5. 3 5. 3 1. 3 1. 0 16. 2 17. 8 4. 3 18. 8 3. 0 18. 3 3. 1 0. 0 15. 5 19. 1 2. 4 TABLE 2 Page 25 of 56

Attel ~

R.

G.

E.

GINNA STATION SG/B MAR91 Date:

Page:

04/23/91 3

REPORTABLE INDICATIONS Row Col I'nd.

Desc.

STWD Volts Indication Location 6

38 28 38 24 39 33 39 23 40 24 40 32 40 33 40 2

41 4

41 20 41 23 41 24 41 27 42 6

43 23 43 22 44 18 45 25 45 27 45 20 46 27 46 33 46 39 46 6

47 7

47 21 47 21 48 3

49 22 49 30 49 SCC WAS ODI WAS SCC SAI WAS WAS SCC SAI SCC SAI ADI WAS WAS WAS WAS WAS WAS SCC SCC SCC ADI ADI ADS SAI ODI SCC SCC SAI SCC SCC SCC WAS SCC WAS ADS SAI ADS ADI WAS

'DS MAI CCI SCC ADS SAI SAI SAI SAI SCC

'SCC SAI 48%

2 1~o 214 254 484 21>o 25%

604 424 204 204

.234 254 324 284 734 864 684 224 794 624'7~o 70<

694 394 72%

204 23>o 674 604 744 0.26 6.24 1.94 1.92 0.34 0.70 7.06 1.16 0.42 0.57 0.32 0.84 3.80 5.70 1.52 4.53 4.61 3.11 0.63 0.34 1.00 0.35 3.40 1.95 2.33 0.46 6.79 0.34 0.35 0.75 0.96 0.50 0.66 1.28 1.63 8.15 2.79 0.15 2.30 5.07 0.56 2.77 0.40 0.24 0.46

- 2.63 1.66 0.40 0.43 0.38 0.29 0.18 1.49 HTS HTS CTS HTS HTS HTE HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS CTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTE HTE HTS HTS HTE HTS HTS HTS HTS HTS HTE 17.7 1 ~ 1 0.6 1.1 15.3 5.1 1.4 1.0 6.2.

8.8 18.9 2.8 14.8 0.5 2.6 1.6 1.6 1.1 2 '

18.9 17.0

16. 1

16. 2 5.7 4'. 7 6.2 1.3

18. 1 8.2 6.6 6.

9'.3 7.9 3.2 7.2 1.7 10.8 13.0 16.9 5.6 0.8

13. 1 4.5 1.5 5.7 0 '3;2 1.7 6.0 18.0 17.8 16.8 4.6 TABLE 2 k

Page 26 of 56

E

R.

G.

E.

GINNA STATION SG/B MAR91 REPORTABLE INDICATIONS Date:

Page:

04/23/91 4

Row Col Ind.

4TWD Desc.

Volts Indication Location 33 49 43 49 25 50 27 50 28 50 39 50 40 50 9

51 12 51 14 51 24 51 28 51 17

~

52 23 52 24 52 26 52 27 52 28 52 29 52 9

53 10 53 25 53 26 53 13 54 19 '4 22 54 26 54 ADI SCC WAS WAS WAS ADI SCC SCC SCC SCC MAI ADS ADS SAI SAI ADS MAI SCC WAS SCC ADI SCC MAI DRT SAI ADI SCC SCC SCC.

DRI WAS MAI ADI MAI ADI WAS SCC ADI SCC SAI WAS SCC DRI ADS SAI

" MAI WAS ADS SAI DRI SAI WAS 90>o 334 25>

344 434 394 834 984 764 354 764 744 684 434 774 34>o 204 784 474 37~o 584 21%

234 2.52 1.61 1.68 2.91 0.75 2.77 0.64 0.96 0,90 0.94 0.33 2.06 2.46 1.39 0.49 6.29 0.33 0.77 0.57 1.01 4.18 19.56 0.63 1.71 0.37 1.74 1.26 0.90 3.19 3.97 0.75 0.58 2.78 0.39 1.91 1.21 0.98 1.70 0.34 0.49 0.83 1.88 18.83 2.64 1.03 0.80 9.25 0'1 0.96 1.20 0.96 1.03 HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTE HTE HTS HTS HTS HTS HTS HTS HTS HTE HTS HTE HTS HTS HTS HTS HTS HTS HTE HTS HTE HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTE HTE HTS HTS HTS HTS HTE HTS

16. 0 18.4 3.4 3.0 3.7 16.4 6.2 18.4 18.3 18.2 5.1

16. 5

15. 6 6.1 3.3 16.6 14.9 8.1 3.3 18.4 17.0 11.0 2.5 19.6 4.2 18.1 14.2 15.7 18.2 19.5 3.2 4.8 16.0 4.1 15.3 2.7 19.1 16.7 17.2 4.0 4.3 14.7 19.5 16.2 3.8 2.8 2.2 4.1 4 '

19.7 3.3 F 1 TABLE 2 Page 27 of 56

'h X

Y's 4'

4

R.

G.

E.

GINNA STATION SG/B MAR91 REPORTABLE INDICATIONS Date:

Page:

04/23/91 5

Row Col Ind.

TWD Desc.

Volts Indication Location 18 55 19 55 26 55 28 55 33 55 13 56 20 56 25 56 26 56 27 56 28 56 30 56 1

57 19 58 20 58 25 58 28 58 31 58 2

59 15 59 29 59 39 59 13 60 19 60 24 60 25 60 DRI ODI

WAS, SCC SCC SCC DRI SCC SAI SAI WAS WAS SCC ADS SCC ADS MAI MAI SCI MAI SCI SCC MAI SAI WAS WAS DRI IDV SCC WAS SCC ADS SAI SAI ADI WAS ADI SCC WAS DRT MAI WAS SCC SCC SAI SCC ADI SCC SAI SAI SCC SAI SAI 204 344 66%

754 64%',

454 304 204 464 58>o 68%

27%'94 67%

224 694 234 964 21'7%

82%

514 604 25~o 964 2.95 1.88

l. 19

0. 61

0. 69

0. 53 6.76 0.48 0.38 1.35 0.78 2.29 2.41 0.49 0.68 8.26 1.49 0.80 1.25 0.74 1.92 2.37 0.87 0.96 1.00 0.83 15.45 0.68 0.50 0.86 0.38 3.62 1.22 0.57 3.35 1.54

1. 32" 0.63 0.90 1.13 1.23 0.96 0.82 0.29 0.44 0.41

3. 63, 0.28 0.82 0.79 0.35 0.43 0.47 HTS CTS HTS HTS HTS HTS HTS HTS HTE HTE HTS HTS HTS HTS HTS HTS HTE HTE HTE HTE HTE HTS HTE HTE HTS HTS HTS HTE HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTE HTS HTS HTS HTE HTE HTS HTS HTS

19. 6 2.6 2.0 10.5 5.6 6.7 19.6 14.6 7.9 2.9 3.8 0.9 18.6

17. 1 8.0 17.4 2.7 3.9 2.4 4.6 1.8

12. 5 5.7 2.5 3.6 0.9 19.4 16.2 14.3 2.5 5.2 18.3 5.4 2.2 16.5 0.5 17.3 15.5 1.0

19. 5 2.3 0.4 18.2 15.5 5.5 16.2 7.4 18.2 2.3 7.2 4.7 5.1 7.0 TABLE 2 Page 28 of 56

A

(*

P

R.

G.

E.

GINNA STATION SG/B MAR91 REPORTABLE INDICATIONS Date:

Page:

04/23/91 6

Row Col Ind.

4TWD Desc.

Volts Indication Location 27 26 27 5

21 30 34 3

22 27 28 26 7

23 24 9

36 24 10 12 22 38 13 18 10 19 8

10 25 26 22.

17 19 20 14 60 61 61 62

, 62 62 62 63 63 63 63 64 65 65 65 66 66 67 69 69 69 69 70 72 73 73 74 75 77 78 80 82 82 83 83 83 84 WAS WAS

.MAI ADS ADS WAS WAS ADI SCC SAI WAS WAS WAS WAS SCC SAI WAS WAS WAS ADI WAS ADS SAI DRI

'CC ADS SAI SCC ADI DRI SCC WAS ADS SAI WAS ADS WAS WAS DRT MAI DRT SAI DRT SAI DRT SAI DRT DRT SAI WAS SCC DRT 244 33>o 204 2 3~o 78~o 30%

234 21%

274 81%

21%

244 27%

294 974 474 53%

20%

204 234 234 294 99%'.

54 0.40 0.37 1.58 3.22 0.63 4.43

1. 17 0.48 0.58 6.22 2.87 2.33 5.29 0.41 0.36 1.39 2.39 5.17 3.84 0.77 2'0 0.57 2.30 0.74 1.78 0.80 0.42 3.18 1'7 0.61 2.93 4.26 0.64 2.40 3.39 0.57 1.94 1.90 3.89 2.36 0.87 3.95 2.51 4.76 1.83 5.51 4.39 7.67 0.66 0.62 1.92 HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTE HTS HTS HTS HTS HTS HTS HTE HTS HTS HTS HTS HTS HTE HTS HTE HTS HTE HTS HTE HTS HTS HTE HTS HTS HTS 1.5 1.4 7.5 6.3 13.7 0.8 0.7 18.4 16.3 4.5 2.2 1.7 1.8 1.8 9.8 9.9 2.5 1.5 2.2 16.9 1.8 18.2 3.2 19.4 17.9 7.7 3.2 19.2 17.1

19. 1

18. 1 1.0 17.5 2.9 0.6 9.4 0.8 0.8 19.2 2.7 19.3 2.5 19.5 2.1

20. 3 2.4 19.2 19.6 2.3 0 '

18.9 19.3 TABLE 2 Page 29 of 56

l K

R.

G.

6 E.

Row Col GINNA STATION SG/B MAR91 REPORTABLE INDICATIONS Ind.

4TWD Volts Desc.

Date:

04/23/91 Page:

7 Indication Location 4

90 1

92 ADS ODI ODI 27~o 37%

2.81 HTS 1.44 HTS 2.00 CTS

16. 1

+ 11.6

+ 11.3 NO OF TUBES 198 NUMBER OF INDICATIONS: 318 SCC 76-1004 SCC 51-754 SCC 26 50~o SCC

'1-25~o ADI

,24 31 11 1

25 Page 30 of 56

L l

~l 4r'

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

As in the past, IGA/SCC is much more prevalent in the "B" steam generator with 42 new IGA indications and 37 new IGSCC indications reported.

In the "A" steam generator, 14 new IGA indications and 16 new IGSCC indications were reported.

The majority of the inlet tubesheet crevice corrosion indications are IGA/SCC of the mil-annealed Inconel 600 tube material.

This form of corrosion is believed to be the result of the tubesheet crevices forming an alkaline environment.

This 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 aggres'sive environment that presently exists.

Table 3 shows the steam generator IGA/SCC history.

Page 31 of 56

t

Ginna Steam Generators Crevice Corrosion Indication History Not Sizeable A

B 0-25<

A B

26-50~o A

B 51-754 A

B 76-1004 A

B TOTAL A

B Mar 1979 Dec 1979 Apr 1980 Nov 1980 Apr 1981 Feb 1982 Oct 1982 Apr 1983 Mar 1984 Mar 1985 Feb 1986 Feb 1987 Feb 1988 Mar 1988 Mar 1989 Apr 1990 Apr 1991 0

0 0

19 0

2 0

0 0

1 0

27 3

11 0

5 0

23 2

3 17 82 3

22 0

1 14 150 16 108 14 42 0

15 0

2 0

5 0

7 0

1 0

5 0

6 1

7 0

1 1

9 1

14 3

16 2

7 0

1 2

35 6

8 2

12

.0.

13 14 16 15 27 25 46 79 32 18 0

2 0

11 0

31 0

3 0

14 0

13 1

59 4

51 1

8 2

69 5

52 34 153 7

41 0

6 24 268 38

157 30 79 TOTALS 69 496 29 67 TABLZ 3 18 143 49 282 146 1017

l

4.0 OBSERVATIONS CONT Along with IGA/SCC in.the

crevice, PWSCC at the roll transition appears to have a slight increase in growth during the last operating cycle.

This mechanism was first addressed in 1989 and this year there were 19 PWSCC indications in "B" steam generator and 59 PWSCC indications in "A"

steam generator.

These numbers include tubes that may have PWSCC in combination with IGA or SCC in the crevice.

A large volume, typically <20~

TW, wastage type condition exists just above the tubesheet secondary face of both generators.

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

Several of the tubes did have penetrations

>204 TW.

Two new tubes in the "A" steam generator were listed for corrective action from this condition.

These tubes were essentially unchanged from prior inspections but were repaired as a preventative measure.

It is believed that these wastage indications were caused by the original water chemistry when phosphate was used as a

buffering medium.

Small indications of probable copper deposits were also found in the tubesheet crevice region randomly located throughout each'team generator.

Page 33 of 56

4 g 4

~

4.0 OBSERVATIONS CONT Minor denting has been detected at the tubesheet secondary face for many years in both steam generators, primarily on the inlet side.

Denting was also detected at the 1st, 2nd and 6th tube support plates randomly throughout the generator, and in most cases was of greater magnitude on size than that at the tubesheet secondary side face.

In general, minor distortions

'f most of the tube support signals were seen.

The denting phenomenon and minor distortions at the tubesheet and support plates can be attributed to secondary side corrosion product buildup in the annular region between the tube outside surface and the carbon steel support member.

Comparisons with previous data indicates that a small increase in the extent or magnitude of denting has occurred from what has been detected by previous inspections.

Indications were detected at the support plates in the cold

~ leg of the "B"

steam generator.

These indications were present and recorded in previous years and were programmed as part of the

>20<

TW examination.

Page 34 of 56

I r+,

4 I

0 P ~

V 4)

Ql 1

4.0 OBSERVATIONS CONT MRPC at the gl tube support plate intersections in the Hot Leg of both steam generators showed no indications within the support plates.

This sample included tubes with and without denting at the support intersection.

MRPC at g6 tube support plate intersections with dents in the Cold Leg of both steam generators showed no indications in or near the support plates.

In summary, the "A" Steam Generator had 89 tubes that. were found to have "new" tubesheet crevice indications.

The "B" Steam Generator had 98 "new" tubesheet crevice indications.

There were eight (8) tubes in the "A" Steam Generator and four (4) tubes in the "B" Steam Generator recorded with indications at the anti-vibration bar intersections.

These indications are less than the repair limit. Many of them were recorded in earlier outages and have not changed significantly since previous examinations.

In light of the fact that only a small number of tubes exhibit these indications, AVB fretting wear is not considered to be an active damage mechanism or major concern at this time but will be monitored for any growth during future outages.

Page 35 of 56

I 4'-

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5.0 CORRECTIVE ACTION Table 4

has been generated to identify tubes with crevice indications or with indications which exceed the repair criteria.

This table also shows. the axial location of the indication and what corrective action was taken on these tubes.

Tubes requiring repair due to hot leg tubesheet crevice indications were identified by the appropriate codes:

an absolute drift indication signal (ADI) of the Mix-2 Channel and/or quantifiable IGSCC indications on the. 400 kHz data.

There were 22 tubes deplugged in the "A" generator and 15 tubes deplugged in the "B" generator and returned to service by sleeving.

These tubes were recorded with repairable indications in earlier outages.

A full length examination was performed to insure no indications existed that would prevent them from being returned to service.

The "A" steam generator had a total of 91 new indications and 1 pulled tube that required repair.

The "B" steam generator had a total of 98 new indications and 1 obstructed sleeved tube that required repair.

A Ginna Steam Generator Tube Inspection and Corrective Action History has been tabulated on Table 5.

Page 36 of 56

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30 10 20 Tubes Not Selected Tubes Out of Service Plugged in 1991 Sleeved in 1991 40 50 60 70 80 90 r

Rochester Gas 8 Electr ic Cor p.

Ginna Nuclear Power Station S/G A Hot Leg 04/25/91 Figure 2 ACRI ISIS Tube8

\\j gl

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R.

G.

E.

Component:

SG/A Ginna Station Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

1 Repair Row Col Ind.

%TWD Volts TYpe Desc.

Indication Location Extent Tested plug sleeve 8

3 MAI 21 9

SCC sleeve 7

15 SAI sleeve 8

15 SAI sleeve 9

18 ODI sleeve 13 18 ADI plug 2

19 ADI sleeve 9

19 DRI DRI sleeve 20 19 SCC 95~o 46~o 854

1. 30 HTE 0.53 HTS 1.24 HTE 2.03 HTE 0.36 HTS 1.31 HTE 2.15 HTS 6.01 HTS 4.38 HTS 1.26 HTS

+

2.5

+

1 '

HTE+ 6.0 51 TSP H '

2.6 HTS+ 0.0

15. 1

19. 3 19.6 19.1 g1 TSP H

g6 TSP H

gl TSP H

+

2.2 HTE+ 6.0 18.6 56 TSP H

+

3.0 HTE+ 6.0 sleeve 19 21 SCC SCC MAI sleeve 18 20 SCC SCC ADI 244 80~o 804 94~o

'.29 HTS 0.26 HTS 0.53 HTE 0.34 HTS 0.85 HTS 0.50 HTE 17.5 17.9 3.3 17.9 18.3

+

3.2 gl TSP H

gl TSP H

HTS+ 0.0 gl TSP H

gl TSP H

HTS+ 0.0 sleeve sleeve sleeve plug 7

24 MAI 27 24 ADI 7

25 MAI 8

25 SAI

1. 00 HTE 0.64 HTE 1.48 HTE 1.89 HTE

+

2.4

+

3.3 HTE+ 6.0 HTS+ 0.0

+

2.1 HTE+ 6.0

+

1.8 HTE+ 6.0 sleeve 24 25 ADI ADI ADI 0.54 HTE 0.31 HTS 0.56 HTS

+

5.0

13. 5 19.5 HTS+ 0.0 HTS+ 0.0 HTS+ 0.0 sleeve 6

26 MAI 1.07 HTE

+

2.0 HTE+ 6.0 sleeve 21 26 SCC SCC DRI 56~o 68>o 0.96 HTS 1.54 HTS 3.71 HTS 15.2 16.5 19.4 46 TSP H

g6 TSP H

Page 38 of 56

f ty

~I

G.

E.

Component:

SG/A Ginna Station Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

2 Repair Type Row Col Ind.

TWD Volts Desc.

Indication Location Extent Tested sleeve sleeve sleeve plug sleeve sleeve sleeve sleeve 23, 26 ODI 25 26 SCC 18 27 ODI 2

28 SAI 7

28 DRI 27 29 SCC 15 30 DRI 16 31 ADI 64 >o 954 0.73 HTS 1.01 HTS 82~o

-0.52 HTS 3.66 HTS 1.35 HTS 414 '. 18 HTS 0.50

.HTE 1.98 HTS

+

2

~ 5

¹6 TSP H

18.7

¹6 TSP H

19. 6 8.9 19.4 16.1

¹1 TSP H.

¹1 TSP H

¹6 TSP H

¹1 TSP H

+

3.1

¹6 TSP H

+

2.8 HTE+ 6.0 sleeve 17 31 SCC SCC DRI MAI 194 11%

0.40 0.42 9.02 2.27 HTS HTS HTS HTE 4.9 5.9 19.4

+

2.7

¹6 TSP H

HTS+ 0.0 sleeve sleeve sleeve sleeve sleeve sleeve sleeve plug sleeve sleeve sleeve 34 31 MAI 30 32 DRI 34 32 MAI 7

33 SAI 18 34 ADI 21 34 DRI 23 34 SCC 1

35 DRI 7'5 SAI 17 35 SAI 18 35 ADI ADI 77 o 0.58 HTE 4.80 HTS 0.77 HTE 1.12 HTE 5.48 HTS 3.29

~

HTS 1.81 HTS 7.27 HTS 1.58 HTE 1.21 HTE 7.36 HTS 3.99 HTS

+

1.6 HTE+ 6.0 19.5

+

2.2

+

2.8 9.1 19.6 17.8 19.2

¹6 TSP H

HTE+ 6.0 HTE+ 6.0

¹6 TSP H

¹1 TSP H

3.4

¹6 TSP H

8.4

¹6 TSP H

+

2.7 HTE+ 6.0

+

2.2 HTE+ 6.0 Page 39 of 56

e

4

'J' I

R.

G.

E.

Component:

SG/A Ginna Station Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

3 Repair Row Col Ind.

TWD Volts Type Desc.

Indication Location Extent Tested sleeve sleeve sleeve 21 37 SCC DRI 28 37 MAI 40 37 MAI sleeve 28 40 SAI sleeve 7

41 SAI sleeve 8

41 DRI sleeve 16 38 SCC sleeve 24 38 SAI sleeve 28 39 SAI sleeve 14 40 SAI sleeve 17 40 DRI 82a

7. 21 HTS

7. 21 HTS 1.13 HTE 0.61 HTE 57+o 0'4 HTS 2.03 HTE 1.28 HTE 1.34 HTE 5.33 HTS 2.42 HTE

19. 5 06 TSP H

19. 5 86 TSP H

+

2.9 HTE+ 6.0

+

2.3 HTE+ 6.0 11.4 46 TSP H

+

2.8 HTE+ 6.0

+

3.0 HTE+ 6.0

+

2.2 HTE+ 6.0 19.9 86 TSP H

+

2.8 HTE+ 6.0 0.78 HTE

., +

2.5 HTE+ 6.0 5.12 HTS 19.8 81 TSP H

sleeve 14 41 SCC SCC SAI 90%

0.38 0.32 1.89 HTS

18. 5 51 TSP H

HTE

+

3.5 HTS+ 0.0 HTE

+

2.6 HTS+ 0.0.

sleeve sleeve sleeve sleeve sleeve 18 41 28 41 30 41 14 43 15 44 WAS ODI DRI MAI SCC SCC SCC ADI DRI 47 47~a 1.2 HTS 1.22 HTS 4.06 HTS 0.99 HTE 91%

88~o 0.63 0.45 0.57 2.97 HTS HTS HTS HTS 75~o 0 ~ 70 HTS

+

2.1

+

2.1 g1 TSP H

g1 TSP H

8.3 gl TSP H

2.4 3.4 5.2 19.5 56 TSP H

46 TSP H

HTS+ 0.0 g6 TSP H

19.6'6 TSP H

+

2.8 HTE+ 6.0 sleeve plug 28 45 SAI 16 46 'CC 1.25 HTE 82~o 1 ~ 19 HTS

+

2.2 5.0 HTE+ 6.0 g1 TSP H

Page 40 of 56

l.

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~'

R.

G.

6 E.

Component:

SG/A Ginna Station Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

4 Repa'ir Row Col Ind.

%TWD Volts Type Desc.

Indication Location Extent Tested plug sleeve sleeve plug 6

47 DRI 13 47 DRI 21 47

~

DRI 3

48 ADI 3.61 2.98 1.67 HTS HTS HTS 6.03 HTS

19. 4

19. 6 19.6 17.6

¹1 TSP H

¹6 TSP H

¹1 TSP H

plug 16 48 SCC ADI ADI 67%

0.48 0.78 0.70 HT.S HTS HTE 15.0 14.5

+

5.9

¹6 TSP H

HTS+ 0.0 HTS+ 0.0 sleeve 20 48 SCC SCC plug 2

49 ADI ADI sleeve 14 49 ADI 78a 0.23 HTS 0.37 HTS 2.81 HTS 0.30 HTE 5.33 HTS 7 ~ 1 7.0

13. 4

+

5.6 4.5

¹6 TSP H

HTS+ 0.0

¹1 TSP H

HTS+ 0.0

¹6 TSP H

sleeve sleeve sleeve sleeve sleeve sleeve sleeve plug 19 49 ADI ADI 21 49 DRI MAI 31 49 WAS SAI 24 50 MAI MAI 21 51 SCC 23 51 SAI 30 51 SAI 17 52 SCC SCC ADI 5.34 HTS 5.73 HTS 4.10 HTS 9.09 HTE 12 2.4 2.69 HTS HTE 2.28 HTE 1.06 HTE 96+o 0 51 HTS 1.10 HTE 2.47 HTE 82+o 0 ~ 85 HTS 29~o 0.29 HTS 0.92 HTE 4.2 15.0 19.4

+

2.0

+

0.6

+

1.9

¹6.TSP H

¹6 TSP H

¹1 TSP H

HTE+ 3.0

¹1 TSP H

HTE+ 6.0

+

2.2

+

2.9 HTE+ 3.0 HTE+ 6.0 16.0

¹1 TSP H

17. 0 1 2 ~ 1

+

3.3

¹6 TSP H

HTS+ 0.0

+

2.2 HTE+ 3.0

+

2.3 HTE+ 6.0 Page 41 of 56

t II >

R.

G.

E.

Component:

SG/A Ginna Station Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

5 Repair Row Col Ind.

%TWD Volts TYpe Desc.

Indication Location Extent Tested sleeve 23 52 MAI SCI SCI 4.26 16.00 6.02 HTE

+

HTE

+

HTE

+

3.3 2.0, 2.5 HTS+ 0.0 HTE+ 3.0 HTS+ 6.0 plug sleeve sleeve 45 52 PUL PUL 11 54 MAI 21 55 SAI SAI SAI 999.90 999.90 g6 TSP H+

~ $ 6 TSP C+

0.4 1.8 g6 TSP H

g6 TSP C

2.04 1.53 HTE 4.36 HTE 1.05 HTE

+

2.6

+

2.2

+

3.3 HTS+ 6.0 HTE+ 3.0 HTS+ 0.0 HTE

+

2.9 HTE+ 6.0 plug sleeve 2

56 SCC 3

56 DRI SAI sleeve 56 SAI DRI.

sleeve sleeve 9

56 ADI 17 56 ADI ADI sleeve sleeve sleeve sleeve sleeve sleeve sleeve 23 56 SAI 24 56 DRI 18 57 ADI 19 57 SCC 21 57 DRI 28 57 SAI 27 58 DRI sleeve sleeve 31 59 MAI 8

60 ADI sleeve '7 59 MAI 89~o 0.44 HTS 4'. 23 HTS 2.25 HTE 3.06 HTE 4.19 HTS 1.29 HTE 3.30 HTS 3.16 HTS 0.65 HTE 0.76 HTS 2.97 HTE 10.90 HTS 5.04 HTS 884 0.65 HTS 6.85 HTS 1.27 HTE 8.33 HTS 2.02 HTE 18.6 19.2

+

2.8

+

3.0 19.5

15. 1

+

6.5 1 2 ~ 1 51 TSP H

gl TSP H

HTE+ 6.0 HTE+ 6.0 51 TSP H

gl TSP H

HTS+ 6.0 HTS+ 0.0

+

2.2 HTE+ 3.0 19.3 17.4 18.7 19.5

+

2.4 19.4 g1 TSP H

g6 TSP H

gl TSP H

g6 TSP H

HTE+ 6.0 g6 TSP H

1 7 ~ 2 51 TSP H

+

2.2 HTE+ 6.0

+

2.6 HTE+ 6.0 Page 42 of 56

l yl g \\

R.

G.

E.

Component,:

SG/A Ginna Station Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

6 Repair Row Col Ind.

TWD Volts Type Desc.

Indication Location Extent Tested sleeve sleeve sleeve sleeve sleeve plug 38 61 DRI 27 62 MAI 17 64 ADI 31 64 SAI 8

65 SCC SCC

~

2 66 SAI 70<a 3.30 1.84 3.62 1.03 HTS HTE HTS HTE 1.77 HTE 0.48 HTS 0.31 HTE 19.5 g6 TSP H

14.8

+

1.8 18.9

+

3.5 g1 TSP H

HTE+ 6.0

,g1 TSP H

HTS+ 0.0

+

2.6 HTE+ 6.0

'+

2. 1 HTE+ 6. 0 sleeve 9

67 WAS WAS WAS SAI 25 29 26 3.0 4.3 2.7 1.17 HTS HTS HTS HTE

+

1.4

+

0.9

+

0.7

+

2.0 51 TSP H

51.TSP H

g1 TSP H

HTE+ 6.0 sleeve sleeve sleeve sleeve sleeve sleeve sleeve sleeve sleeve sleeve sleeve sleeve sleeve 14 67 SAI 27 67 SAI 6

68 SAI 9

69 DRI 9

70 SAI 21 71 ADI 16 72 SAI 17 73 ADI 25 74 SAI 28 74 ADI 30 75 MAI 31 75 SAI 12 77

. SCC 76%

2.82 HTS 4.00 HTE 1.80 HTE 1.02 HTS 1.92 HTE 1.54 HTE 1.57 HTE 7.64 HTS 3.12 HTE 4.20 HTS 1.43 HTE 1.44 HTS 3.75 HTE

+

2.6 HTE+ 6.0

+

2.0 HTE+ 6.0

+

1.8 HTE+ 6.0 19.2 56 TSP H

18.2

+

2.1 18.2

+

1.9 18.7

+

1.8 g1 TSP H

HTE+ 6.0 g6 TSP H

HTE+ 6.0

$ 6 TSP H

HTE+ 6.0

+

2.0 HTE+ 6.0 16.2 gl TSP H

+

2.0 HTE+ 6.0 Page 43 of 56

R.

G.

E.

Component:

SG/A Ginna Station Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

7 Repair Row Col Ind.

TWD Volts Type Desc.

Indication Location Extent Tested sleeve 27 77 SAI sleeve 9

78 MAI 2.13 HTE 1.98 HTE

+

2.0 HTE+ 6.0

+

1.7 HTE+ 6.0 sleeve sleeve 7

82 SCC SAI 13 83, SAI 764 0.42 HTS 3.22 HTE 1.78 HTE

19. 1 gl TSP H

+

2.5 HTE+.6.0

+

2.0 HTE+ 6.0 NO OF TUBES:

116 Page 44 of 56

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30 10 20 Tubes Not Selected Tubes Out of Service Plugged in 1991 Sleeved in 1991 40 50 60 70 80 90 Rochester Gas 8 Electric Cor p.

Ginna Nuclear Power Station S/G B Hot leg 04/25/91 Figure 3 ACRI ISIS Tubes

0 ~

R.

G.

E.

Component:

SG/B GINNA STATION Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

1 Repair Row Col Ind.

%TWD Volts Type Desc.

Indication Location Extent Tested plug sleeve plug sleeve sleeve 5

2 ADI 14 6

ADI 2

8 SAI ll 10 DRI 7

11 SCC SAI sleeve sleeve sleeve sleeve sleeve 11 14 6

16 27 16 2

20 17 24 DRI ADI SCC ADI SCC SAI DRI MAI SAI sleeve 17 12 MAI 90<

954 79<

2.54 HTS 2.38 HTS 0.51 HTE 4.01 HTS 0.69 HTE 4.69 HTS 2.19 HTS 1.50 HTS 2.39 HTS 0.46 0.89 2.06 0.52 0.90 HTS HTE HTS HTE HTE 0.34 HTS 0.59 HTE 17.8 1 3

~ 7 N1 TSP H

N2 TSP H

19. 3 18.1

+

3.2

+

2.6 Nl TSP H

N6 TSP H

HTS+ 0.0 HTE+ 6.0

19. 5, C1 TSP H

17 ~ 2 18.4

17. 6

14. 1

+ 14.4 19.4

+

4.3

+

7.2 N6 TSP H

N6 TSP H

g6 TSP H

Nl TSP H

HTS+ 0.0 Nl TSP H

HTS+ 0.0 HTS+ 0.0

+

4.0 HTS+ 0.0 sleeve sleeve sleeve 33 24 12 25 16 25 SCC ADI DRI SCC sleeve sleeve sleeve sleeve sleeve 29 25 17

27 DRI SAI 15 28 ADI 28 28 SCC 2

29 SAI sleeve 27 25 92~o 3.15 HTS 704 0.57 HTS 0.24 HTE 1.07 HTE 2.01 HTS 84 ~o 1 02 HTS 1.62 HTS 0.40 HTE 3.03 HTS 18.6 N6 TSP H

+

4.5 HTS+ 0.0 19.6 18.7 19.2 g1 TSP H

g6 TSP H

Nl TSP H

6.0 10.3

+

5.8 N1 TSP H

46 TSP H

HTS+ 0.0

+

4.3 HTS+ 0.0 Page 46 of 56

l W'1 J

1 lp,

R.

G.

6 E.

Component:

SG/B GINNA STATION Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

2 Repair Row Col Ind.

%TWD Volts TYpe Desc.

Indication Location Extent Tested sleeve 26 29 SCC SAI sleeve 29 29 SCC DRI sleeve 31 30 SAI sleeve 39 31 SCC 3 4~o 604 7 9~o 0.26 HTS 0.54 HTE 0.55 HTS 4.76 HTS 1.35 HTE 1.87 HTS

14. 4

+

7.4 18.4 19.1 N6 TSP H

HTS+ 0.0 51 TSP H

gl TSP H

18.4 41 TSP H

+

2.7 HTE+ 6.0 sleeve 19 32 SCC SCC SCC 86>o 544 584 2.61 HTS 0.60 HTS 0.38 HTS 19.2 11.9 14.6 g6 TSP H

56 TSP H

g6 TSP H

plug 43 sleeve 20 32 CCI 33 SAI sleeve 12 34 SCC MAI sleeve 23 34 ADI sleeve 26 35 SCC SAI sleeve 32 35 MAI sleeve 33 35 SCC SAI sleeve 40 33 SCC sleeve 9

34 ADI 54~o 65~o 0'1 HTS 0.44 HTE 0.39 HTE 0.44 HTS 0.76 HTE O.ll HTE 0.23 HTS 984 1.69 HTS 5.65 HTS 704 0.36 HTS 0.62 HTS 2.00 HTS

+

3.0 11.5

19. 0 15.0 7.'0 5.3 5.3

17. 8

+

4.3

+

3.0

18. 3

+

3.1 HTE+ 3.5 HTS+ 0.0 N6 TSP H

Nl TSP H

gl TSP H

HTS+ 0. 0 41 TSP H

g6 TSP H

HTS+ 0.0 HTS+ 0.0 N6 TSP H

HTS+ 0.0 plUg 5

37 OBS sleeve 26 37 MAI 500mil HTE 0.98 HTE

+ 17.0 HTE+17.0

+

2.4 HTE+ 6.0 sleeve sleeve 6

38 SCC 33 39 SCC SAI 48~o 484

0. 26 HTS 0.34 HTS 0.70 HTE 17 ~ 7 15.3

+

5.1 g6 TSP H

N6 TSP H

HTS+ 0.0 Page 47 of 56

f nw CM h~

1 R.

G.

E.

Component:

SG/B GINNA STATION Outage:

NAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

3 Repair Row Col Ind,.

%TWD Volts Type Desc.

Indication Location Extent Tested sleeve sleeve sleeve sleeve 32 40 SCC SAI 33 40 SCC SAI 2

41 ADI 6

43 SCC SCC SCC 604 4 2~o 73~o 86>o 684 0.42 0.57 0.32 0.84 3.80 0.34 1.00 0.35 HTS HTS HTS HTE HTS HTS HTS HTS 6.2 8.8 18.9

+

2.8 14.8

18. 9

17. 0

~

16. 1 Nl TSP H

HTS+ 0.0 56 TSP H

,HTS+ 0.0 Nl TSP H

N6 TSP H,

N6 TSP H

sleeve 23 43 ADI ADI s leeve 22 44 SAI sleeve 25 45 SCC SCC SAI 79>o 62~o 1.95 3.40 HTS HTS 0.46 HTS 0.34 HTS 0.35 HTS 0.75 HTS 5.7 16.2 6.2

18. 1 8.2 6.6 Nl TSP H

Nl TSP H

HTS+ 0.0 Nl TSF H

Nl TSP H

HTS+ 0.0 sleeve 27 45 SCC SCC SCC 57~o 69~o 704 0.96 0.66 0.50 HTS HTS HTS 6.9 7.9 8.3 g6 TSP H

N6 TSP H

sleeve sleeve sleeve sleeve plug sleeve sleeve 20 46 SCC 33 46 SAI 39 46 ADI 7

47 MAI 21 47 CCI 21 48 SCC 3

49 SAI SAI SAI 72~o 1.63 0.15 HTS HTS 0.43 HTS 1.66 HTE 0.40 HTS 5.07 HTE 0.40 HTE 0.24 HTE 674 0.46 HTS 7 '

N6 TSP H

13.0

+

5.6 HTS+ 0.0 HTS+ 0.0 5.7 6.0

+

3.2 1 ~ 7 g6 TSP H

HTS+ 0. 0 HTS+ 0. 0 HTS+ 0.0

+

4.5 HTS+ 0.0

+

1.5 HTE+ 1.5 sleeve 22 49

. SCC SAI 60%

0.29 HTS 0.38 HTS 17.8 18.0 Nl TSP H

HTS+ 0.0 Page 48 of 56

4 fc Q",p, 4

R.

G.

E.

Component:

SG/B GINNA STATION Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

4 Repair Row Col Ind.

4TWD Volts Tppe Desc.

Indication Location Extent Tested sleeve 30 49'CC SAI sleeve sleeve sleeve sleeve 33 49 ADI 43 49 SCC 27 50 ADI 28 50 SCC SCC sleeve 39 50 SCC sleeve sleeve sleeve sleeve sleeve sleeve sleeve sleeve 40 50 SCC 9

51 MAI 12 51 SAI SAI 14 51 MAI 24 51 SCC SCC 28 51 SCC ADI 17 52 MAI 23 52 SAI ADI sleeve

~sleeve 24 52 SCC SCC

\\

26 52 SCC DRI sleeve 27 52 MAI ADI sleeve 28 52 MAI 7 4~o 0.18 HTS 1.49 HTE 90~o 43~o 39<o 83~o 98~o 2.52 HTS 1.61 HTS 2.77 HTS 0.64 HTS 0.96 HTS 0.90 HTS 0.94 HTS 0.33 HTE 0.49 HTE 1.39 HTE 0.33 HTS 744 19.56 HTS 4.18 HTS 43~o 684 77~o 0.63 HTE 0.37 HTE 1.74 HTS 0.90 HTS 1.26 HTS 3.19 HTS 3.97 HTS

,0.58 HTE 2.78 HTS 0.39 HTE 7 6+o 1 ~ 0 1 HTS 76~o 0.77 HTS 16.8

+

4.6 16.0 18.4 16.4 6.2 18.4

18. 3 18.

2'1 TSP H

HTS+ 0.0

¹1 TSP H

.¹1 TSP H

¹6 TSP H

¹1 TSP H'1 TSP H

+

5.1 HTS+ 0.0

+

3'.3

+

6.1 HTS+ 0.0 HTS+ 0.0

14. 9

18. 4 8.1 11.0 17.0 HTS+ 0.0

¹6 TSP H

+

2.5 HTE+ 6.0

+

4.2 18.1 15.7 14.2 HTE+ 6.0

¹1 TSP H

¹6 TSP H

¹6 TSF H

18. 2

19. 5

+

4.8 16.0

¹6 TSP H

HTE+ 6.0

¹1 TSP H

+

4.1 HTE+ 6.0 Page 49 of 56

I lg v

ll J',

R.

G.

E.

Component:

SG/B GINNA STATION Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

5 Repair Row Col Ind.

4TWD Volts Type Desc.

Indication Location Extent Tested sleeve sleeve ADI 29 52 SCC 9

53 ADI 1.91 784 0.98 1.70 HTS HTS HTS 15.3 19.1 16.7 51 TSP H

$ 6 TSP H

51 TSP H

sleeve sleeve sleeve sleeve sleeve sleeve sleeve 10 53 SCC SAI 26 53 SCC DRI 13 54 SAI MAI 19 54 SA1 22 54 DRI SAI 26 54 DRI 19 55 SCC SCC 47'.34 0.49 584 1.88 18.83 HTS HTE HTS HTS 1.03 0.80 HTE HTE 1.20 0.96 2.95 HTS HTE HTS 754 6 6~o 0.69 0.61 HTS HTS 0.96

, HTS 17 ~ 2

+

4.0

14. 7

19. 5

+

3.8

+

2.8 4.4 g6 TSP H

HTS+ 0.0 56 TSP H

g6 TSP H

HTS+ 0.0 HTS+ 0.0 HTS+ 0.0

19. 7

+

3.3 g1 TSP H

HTE+ 6.0 5.6 10.5 g6 TSP H

g6 TSP H

19.6 46 TSP H

sleeve sleeve sleeve sleeve 26 55 SCC SCC SAI SAI DRI 33 55 SCC 20 56 SCC 25 56 MAI MAI SCI MAI SCI 64 >o 454 464 58 ~o 0.53 0.48 0.38 1.35 6.76 2.41 0.68 0.80 1.49 1.25 0.74 1.92 HTS HTS HTE HTE HTS HTS HTS HTE HTE HTE HTE HTE 6.7 14.6

+

7.9

+

2.9 19.6 18.6 8.0

+

3.9

+

2.7

+

2.4

+

4.6

+

1.8 g6 TSP H

g6 TSP H

HTE+ 6.0 HTE+.6.0 56 TSP H

g1 TSP H

g6 TSP H

HTS+ 0.0 HTS+ 0.0 HTE+ 6.0 HTE+ 6.0 HTS+.0.0 plug 26 56 SCC SAI 68%

2.37 0.96 HTS HTE 12.5

+

2.5 g6 TSP H

HTE+ 6.0 Page 50 of 56

~

+1 l

R.

G.

6(

E.

Component:

SG/B GINNA STATION Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

6 Repair Row Col Ind.

%TWD Volts Type Desc.

Indication Location Extent Tested sleeve 30 56 DRI sleeve 19 58 SCC 67 ~o 0.87 HTE 15.45 HTS 0.50 HTS

19. 4

14. 3 N6 TSP H

N6 TSP H

+

5.7 HTE+ 6.0

- plug 25 58 SCC SAI SAI 69~o 0.38 HTS 0.57 HTE 1.22 HTS 5.2

+

2.2 5.4 Nl TSP H

HTS+ 0.0 HTS+ 0.0 sleeve sleeve sleeve sleeve 2

59 ADI 15 59 SCC 29 59 MAI 39 59 SCC sleeve 28 58 ADI 3.35 HTS 1.32 HTS 964 0.63 HTS 1.23 HTE 824 0.82 HTS 16.5 1 7

~ 3

15. 5 gl TSP H

Nl TSP H

18.2 gl TSP H

+

2.3 HTE+ 6.0 sleeve 13 60 SCC SCC

~SAI 51'0~o 0.29 HTS 0.41 HTS 0.44 HTE 15.5 16.2

+

5.5 Nl TSP H

Nl TSP H

HTS+ 0.0 sleeve 19 60 SCC ADI SAI 254

0.28 HTS 3.63 HTS 0.82 HTE 18.2 7.4

+

2.3 N6 TSP H

N6 TSP H

HTS+ 0.0 sleeve 24 60 SAI 0.79 HTE

+

7.2 HTE+ 6.0 sleeve 25 60 SCC SAI SAI 96~o 0.35 HTS 0.43 HTS 0.47 HTS 4.7 5.1 7.0 gl TSP H

HTS+ 0.0 HTS+ 0.0 sleeve sleeve sleeve sleeve 28 63 SCC SAI 63 SCC

. SAI 27 61 MAI 34 62 ADI 0.37 HTS 1.17 HTS 78~o 0.48 HTS 0.58

- HTE 81%

0.41 HTS 0.36 HTS 7.5 18.4 16.3

+

4.5 9.8 9.9 HTS+ 0.0 N6 TSP H

Nl TSP H

HTS+ 0.0 Nl TSP H

HTS+ 0.0 Page 51 of 56

I

<~ kk

,l4

R.

G.

E.

Component:

SG/B GINNA STATION Outage:

MAR91 REPAIRABLE INDICATIONS Date:

04/24/91 Page:

7 Repair Row Col Type Ind.

4TWD Volts Desc.

Indication Location Extent Tested sleeve sleeve sleeve sleeve sleeve sleeve 7

65 ADI 24 65 SAI 9

66 DRI 36 66 SCC 10 69 SCC SAI 12 69 ADI 3.84 HTS 0.57 HTE 2.30 HTS 97%

0.74 HTS 47+o 0 ~ 42 HTS 0.80 HTE 3.18 HTS 16.9 g1 TSP H

19. 4

17. 9 19.2

+

3.2' 7 ~ 1 gl TSP H

gl TSP H

HTS+ 0.0 gl TSP H

+

3.2 HTS+ 0.0 sleeve 22 69 DRI plug 38 69 SCC sleeve 18 sleeve 25 plug 72 SAI 77 MAI 78 SAI sleeve 26 80 SAI sleeve 17 82 SAI sleeve 17 83 SAI sleeve 20 83 SCC 1.37 HTS 53+o 0 ~ 61 HTS 0.64 HTE 3.89 HTE 0.87 HTE 2.51 HTE 1.83 HTE 7.67 HTE 994 0.62 HTS

19. 1 18.1 g6 TSP H

56 TSP H

+

2.9 HTS+ 0.0

+

2.7 HTE+ 6.0

+

2.5 HTE+ 6.0

+

2.1 HTE+ 6.0

+

2.4 HTE+ 6.0

+

2.3 HTS+ 0.0 18.9 81 TSP H

NO OF TUBES:

117 Page 52 of 56

g, s

~

Cp>

U

CI NBA STEAN CENKRATOR tUSE INSPECTION AND CORRECTIVE ACfION NISTORT DAIE'O. TUBES INSPECTED A

8 Not COLO HOT COLD TOTAL TUBES REGUI R INC CORRECTIVE ACTION A

8 TTPE OF DEGRADATION

>CON REOUI RKD REPAIRS A

8 No.

TUSES PLUGGED A

8 NO.PLUGGED NO.PLUGGED RETURNED RETURNED NO.

TUBES 'fo SERVICE To SERVICE NO SLEKVES NO. PULLED SLEEVED V!TH SLV MITNOUI SLV PLUGGED

'fUSES A

8 A

B TOTAL PLUGGED A

8 TOTAL SLEEVED CCHNENT A

8 IN FACTORT APR 1972 HAR 1974 NOV 197C HAR 1975 JAN 1976 FEB sore APR 1976 APR 1977 JUL 1977 JAN 1978 APR 1978 FEB 1979 DEC 1979 APR 1980 NOV 1980 HAT 1981 FEB 1982 SEP 1982 APR 1983 HAR 1984 NAR 1985 fEB 1986 FES 1987 fEB 1988 NAR 1988 NAR 1989 HAR 1990 APR 1991 1050 3259

$ 16 1701 C30 2174 CC2 0

0 3192 3192 100 0

2003 268 2049 325 2049 325 3139 325 3138 325 3138 325 3137 526 3138 382 3137 633 3137 717 313S 3135 313C 623 3128 0

3122 1517 0

0 3128 1668 2949 663 2945 1093 1098 516 672 39 1931 442 53 0

3247 3247 1025 75 1525 268 300 171C 375 171 C 37S 3182 375 3151 37$

31CI COO 3140 526 3129 893 3096 832 3093 963 3087 3087 3083 770 288C 0

2723 1301 208 0

2805 1486 2437 653 2359 1092 I

0 0

0 19 0

2 0

Cb 11 0

2 39 2

0 15 13 2

o e

0 8

I 1$

o e

0 13 1

31 0

0 0

C 0

18 I

33 4

4 I

I 3

4 6

27 3C 73 7

Cl 0

9 177 CCS 75211 lib 117 MASTAGE MASTACE CRACKINC/MASTACE HASTACE VASTAGE CRACKING VASTACE ID CRACKING CRACKINC/MASTAGE IO CRACKING CRACKING/MAS/ISA ISA/VASTAGE "A"Pl'tflNGI"8"IGA ICA ISA/VASTAGE ISA/HECN.OAN ISA ISA/SCC ISA/SCC ISA/SCC/VASTAGE ICA/SCC/MASfAGE ICA/SCC I GA/SCC IGA/SCC ISA/SCC/PVSCC/VAS ISA/SCCIPVSCCIVAS ICA/SCC/PVSCCIMAS I

0 0

0 19 0

2 0

Cb 11 0

2 39 2

0 15 13 I

0 5

0 8

I 15 0

6 0

13 I

13 0

2 0

6 0

16 I

28 0

23 0

5 3

70 2

C9 17 78 4

18 0

6 21 142 18 70 16 35 I

0 0

0 19 0

2 0

C6 11 0

2 39 2

0 15 13 I

0 5

0 8

1 15 0

6 0

13 I

3C 0

0 0

C 0

18 I

0 I

I C

0 27 10 72 14 58 0

8 36 73 22 20 14 9

0 0

0 0,

0 0

0 5

0 16 0

0 0

0 4

7C 0

9 2

67 6

30 2C 80 0

0 0

0 132 306 56 163 80 93 0

0 0

3 0

0 0

0 9

6C 0

28 22 15 0

0 0

0 8

18 0

0 0

I 0

0 0

3 I

I 0

I 4

5 5

.I I

2 0

0 0

0 2

0 0

0 2

0 0

1 0

0 0

3 0

0 0

0 I

0 0

0 I

0 0

2 0

I 0

0 0

19 0

2 0

Cb 11 0

2 39 2

0 15 13 1

0 5

0 8

I 15 0

6 0

13 3C 0

0 0

4 0

18 I

33 0

4 I

2 2

C 0

24 10 75 15 59 0

9 22

.C 2C

~ 8

-7

-e 0

0 0

0, 0

0 0

0 O

d 0

0 0

5 0

16 0

0 0

0 C

73

~ 0 8

2 67 6

33 2C 77

.I.I 0.I 137 365 51 190 101 106 6

7 8

9 10

'll 12 13 SCb 1098 222 CC2 304 BC3 31 110 8

18 11 15 7

9 190 326 32C 938 TASLE 5

K, J, Vschter 2C-Apr.91 Rcv. 0

~,

c 41 I

I

%li

STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY COMMENTS (FROM TABLE 5)

(1)

Pulled R15 C55 and R17 C41 from the hot leg and R17 C40 from the cold leg to determine IGA conditions in the "B" steam generator.

R17 C41 and ECT indications at all frequencies, R15 C44 had only 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 5

tubes with nickel plated Inconel 600 thermally treated sleeves.

Three tubes had IGA indications, two others were preventatively sleeved.

(3)

Sleeved 16 tubes with co-extruded sleeves, 13 with defects and 3 preventatively.

Pulled Hot Leg tubes R21 C46 with a 100 kHz ECT indication, R7 C45 and R28 C 45 which were clean tubes.

(4)

Recovery from the January 25, 1982 Tube Rupture Event including removing 26 tube sections by EDM and ID cutters along with the one tube pulled from the secondary side.

(5)

The four tubes identified with IGA in the "A" steam generator were sleeved with 22" tubesheet sleeves.

The 78 tubes identified in the "B" steam gene'rator with IGA and/or SCC in the crevice were repaired as follows:

41 9

24 1

1 tubes were sleeved with tubes were sleeved with tubes were sleeved with tube and 2 sleeves were tube R34 C54 was pulled 36" brazed sleeves 28" brazed sleeves 22" tubesheet sleeves plugged for metallurgical analysis (6)

The two tubes identified with IGA in the crevice in the "A" steam generator inlet were sleeved with 20" tubesheet.

sleeves.

One indication >40%

TWD in the U-bend was permanently plugged.

The 70 tubes identified in the "B" steam generator were repaired as follows:

56 10 3

1 1

tubes were sleeved with 20" tubesheet sleeves tubes were sleeved with 36" brazed sleeves tubes were mechanically plugged (CE removable) tube was explosively plugged tube was sleeved with a 36" brazed sleeve due to the domino effect.

4 Page 54 of 56

I II J

4

(7)

The five tubes identified with crevice indications in the "A" steam generator inlet were sleeved with 27" Combustion Engineering (CE)

Sleeves.

One tube identified with an O.D. general indication above the secondary side tubesheet was also sleeved with a 27" CE sleeve.

The 57 tubes identified in the "B" steam generator were repaired as follows:

27 tubes were sleeved with 27" CE 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.

(8)

The 34 tubes identified with crevice indications in the "A" steam generator inlet were repaired as follows:

10 tubes were mechanically plugged (CE removable) 24 tubes were sleeved with 27" CE welded sleeve The 153 tubes identified with crevice indications in the "B" steam generator inlet were repaired as follows:

72 tubes were mechanically plugged (CE removable) 80 tubes were sleeved with 27" CE welded sleeves 1

CE welded sleeve (installed in 1987) was plugged with a CE welded sleeve plug due to rejection of upper weld.

Other repairs required in the "B" steam generator are as follows:

B&W test brazed sleeves (installed in 1980) were plugged due to the loss of the primary to secondary pressure boundary as detected by the Hydro Test.

Westinghouse explosive plugs installed prior to 1987 were removed due to leakage and replaced with CE welded plugs.

CE Mechanical Plug on the cold leg was removed and replaced with a CE Mechanical Plug.

CE welded sleeves (installed in 1987),

are considered aS "leak limiting" due to the marginal acceptance of /he upper welds.

(9)

$ n the "A" steam generator, 15 tubes were plugged as follows:

7 tubes had tubesheet crevice indications 7

tubes for no confirmed AVB support 1

CE sleeve for unverified, upper expansion In "B" steam generator, 61 tubes were plugged as follows:

39 2

8 10 1

8 tribes had.=tubesheet crevice indications tubes were missplugged in the hot leg during 1987 outage tubes to box existing plugs were AVB support could not be verified.

tubes for no confirmed AVB support

'ube for flow peaking consideration due to AVB placement Westinghouse Explosive Plugs were removed and replaced with welded "Top Hat" Plugs Page 55 of 56

J u

'll 4

b'MP'a I

tg

(10)

The "B" steam generator had 9 tubes plugged for the following reasons:

tubes had tubesheet crevice indications identified by a review of the February data.

. These were removed from service with CE mechanical plugs.

tubes had signal changes from February to March.

The tubes were removed from service with CE mechanical plugs.

BGW tubesheet sleeve identified by the hydrostatic pressure test was removed from service with a BGW explosive plug in the hot leg and a CE mechanical in the cold leg.

(ll)

A total of 177 tubes in "A" steam generator were repaired in 1989 as follows:

137 40 2

CE 27" welded sleeves (straight and periphery)

Tube and/or sleeve plugs Previously plugged tubes stabilized (not counted as repaired)

A total of 445 tubes were repaired in "B" steam generator were repaired as follows:

367 78 1

CE 27" welded sleeves (straight and periphery)

Tubes and/or sleeve plugs Previously plugged tube stabilized (not counted as repaired) lI 51 24 CE 27" welded sleeves (straight and periphery)

Tube and/or sleeve plugs (includes pulled tubes R25-C63 and R31-C66)

A total of 211 tubes were repaired in "B" steam generator were repaired as follows:

(12)

A total of 75 tubes in "A" steam generator were repaired in 1990 as follows:,

191 20 CE 27" welded sleeves (straight and periphery) including 28 deplugged tubes Tubes and/or sleeve plugs (includes BGW tubesheet sleeve noted during hydro)

(13)

A total of 116 tubes, including 24 deplugged tubesi in "A" steam generator were repaired in 1991 as follows:

61 CE 27" welded sleeves (straight and periphery) 41 CE 30" welded sleeves (straight) 14 Tube and/or sleeve plugs (includes pulled tube R45-C52 and deplugged tubes R17-C52 and R16-C48)

A total of 117 tubes, including 16 deplugged tubes, in "B" steam generator were repaired as follows:

80 CE 27" welded sleeves (straight and periphery) 28 CE 30" welded sleeves (straight) 9 'Tube and/or sleeve plugs (includes sleeved tube R5-C37, deplugged tube R26-C56 and 2

BGW Explosive plug repairs)

Page 56 of 56

ML17262A469

Contents

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SUMMARY

5.0 INTRODUCTION

SUMMARY

1.0 INTRODUCTION

SUMMARY

Navigation menu

ML17262A469

Text

SUMMARY

5.0 INTRODUCTION

SUMMARY

1.0 INTRODUCTION

SUMMARY

Navigation menu

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