Text

Rev 0 to Final Exam Rept for 1995 SG Eddy Current Insp at Ginna Nuclear Power Station,
	ML17264A105
Person / Time
Site:	Ginna
Issue date:	05/04/1995
From:	Davison M, Saporito M; ROCHESTER GAS & ELECTRIC CORP.
To:	;
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ML17263B116	List: ML17263B115; ML17264A105;
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	NUDOCS 9507170169
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ROCHESTER,GAS AND ELECTRIC CORPORATION 89 East Avenue, Rochester, NY 14649 MATERIALSENGINEERING AND INSPECTION SERVICES FINALLAMINATIONREPORT FOR THE 1995 STEAM GENI9tATOR EDDY CURRENT INSPECTION AT R. E. GINNA NUCLEAR POWER STATION REVISION 0 May 3, 1995 PREPARED BY:

Michael J. Dav' Engineering Assistant - NDE, Laboratory and Inspection Services APPROVED BY:

Michael J.

Sap ito Supervisor, Technical Services Laboratory and Inspection Services DATE: ~ V 9507170169 950710 PDR ADOCK 05000244 PDR

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TABLEOF CONTENTS 2.0 DAT A

ITION PR RAM 3.0 DATA ANALY IS R T

UMMARY 10 5.0 RRE TIVE A TI N Figure 1 Figure 2 Figure 3 Table 1-A Table 1-B Table 2-A Table 2-B Table 3 Table 4-A Table 4-B Table 5 13 29 41 49 55 61

LO I~IDODO TIOD The followingis a summary report of the results of the multifrequency eddy current examination performed during the 1995 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 MillAnnealed 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 1994 examination.

Particular attention was given to the detection of:

1)

Intergranular attack (IGA)and intergranular stress corrosion cracking (IGSCC) within the inlet tubesheet crevice region.

2) 3)

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

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

4)

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

5)

Pitting and wastage between the tubesheet and first support plate.

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I 6)

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

7)

Denting at tube support intersections.

8)

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

9)

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

The examination was performed by personnel from Rochester Gas and Electric (RG&E) and ABB-Combustion Engineering (ABB-CE).

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 H for data analysis.

All examination activities were performed in accordance with MEIS NDE-500-17. 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 accordance with Revision 3 of the Electric Power Research Institutes (EPRI) "PWR Steam Generator Inspection Guidelines".

The data analysis was performed by two independent teams.

For bobbin data evaluation, the primary analysis was performed manually utilizing the 2 of 66

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Zetec EDDYNET Data Analysis System and the secondary analysis

was, performed utilizing the Computer Data Screening (CDS) capability of the EDDYNET system.

Primary and secondary analysis of all other data (i.e.,

MRPC, Rotating Crosswound, Plus-Point, etc.)

was performed. manually utilizing the EDDYNET Data Analysis System.

The results of all primary and secondary analyses were compared for discrepancies using the EDDYNET compare program.

The typical data flow chart is shown on Figure 1 (Page 5).

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

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

Any indication spanning the repair limit, (39% vs. 41%).

Any difference of >

1 inch in the axial location of a flaw.

Any tube which was analyzed by one analyst but not the other (may have been missed or improperly entered by one analyst).

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.

Any tube reported as restricted by one analyst but not the other (may have been missed or improperly entered by one analyst).

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

o AllRoll Transition Indications reported by one analyst but not the other.

In addition to the above, gll tubes requiring repair whether reported by one or both analysts were reviewed by the resolvers.

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

'Lead Analyst personnel.

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Typical Data Flow Chart BOBBIN DISCREPANCY RESOLUTION FLOW CHART Pr )nor M Analjrs).

orrCAIIIIAIM

+re tge lS (COG>

Yee Oo Ar'c,r ~ I rr AOr e<<'ie)ll NO Frrr ghrrr Hc,t ion Reeo jrrt rrrrr fer r+wr rr F<<edbrrck/Sort Rev to Ion Arnor r LAB K>N re"r".

fr-o,rsr Figure 1

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2.0 DATA A SITI N PR RAM The initial eddy current examination of the "A" and "B" steam generators was performed utilizing a standard bobbin coil technique with data acquisition being performed with the EDDYNET Acquisition System.

The frequencies selected were 400,

200, 100 and 25 kHz. The examination was performed primarily from the 1st tube support through the tubesheet region to examine open crevice, roll transition regions, and the area between the top of the inlet tubesheet to the 1st tube support plate.

20% of all open tubes were also examined throughout the full length of tubing.

Additional eddy current examinations of the "A" and "B" steam generators were performed utilizing the Zetec 3-coil Motorized Rotating Pancake Coil (MRPC) probe to examine the roll transition region, and selected crevices.

The frequencies used for these examinations were 400,

300, 100, and 25 kHz. Allrow 1 and 2 U-bends were also examined with MRPC. Allsleeve examinations (except for the B&W brazed and old style explosive sleeves) were performed using the Zetec "Plus-Point" probe.

The B&W brazed sleeves and the old style explosive sleeves were examined using a saturation bobbin technique due to the magnetic permeability of the sleeve material.

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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 through the. first tube support plate, along with 20%

r of these tubes being selected and examined for their fulllength (20% random sample as recommended in the Electric Power Research Institute (EPRI) guidelines) with the bobbin coil. In addition, 20% of each type ofsleeve was examined'and the remaining tube examined full length.

All Row 1 and Row 2 U-bend regions were examined with the Motorized Rotating Pancake Coil (MRPC) between the 06H and 06C from the cold leg side.

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

Tables 1-A and 1-B are breakdowns, by steam generator, of all tubes programmed for, examination, numbers examined and the extent examined.

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STEAM GENERATOR "A" 1995 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION Total Tubes Out of Service Sleeved Tubes Open Unsleeved Tubes 3260 215 810 2235 REQ'D nm'UMBER NUMBER PERCENT PRO GM'D INSPT'D COMPLETE Hot Leg to 1st TSP 2235 Sleeves Full Crevice-MRPC B&W Explosive Plugs 216 36 Full Length (20% Random 772 plus previous indications)

Roll Transition MRPC

. 2235 U-Bend MRPC (Rows 1% 2) 157 2235 772 2235 157 216 36 Table 1-A 2235 772 2235 157 216 36 100.0%

100.0%

'er Appendix B requirement.

4 Complete

= Tubes Inspected/Required Minimum.

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'TEAMGENERATOR "B" 1995 EDDY CURRENT INSPECTION EXTENTS PRIOR TO CORRECTIVE ACTION Total Tubes Out of Service Sleeved Tubes Open Unsleeved Tubes 3260 314 1388 1558 REQ'D MIN'UMBER NUMBER PERCENT P~RD M'D IIIEPP'D C~MPLE

'ot Leg to 1st TSP 1558 1558 1558 100.0%

U-Bend MRPC (Rows 1 & 2) 133 Sleeves Full Crevice MRPC B&WExplosive Plugs 627 84 19 Full Length (20% Random plus previous indications) 984 Roll Transition MRPC 1558 984 1558 133 627 84 19 984 1558 133 627 84 19 100.0%

100.0%

Table 1 -B

'er Appendix B requirement.

4 Complete

= Tubes Inspected/Required Minimum.

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3.0 DATA ANALYSISR TS UIVIMARY The data analysis was performed using the Zetec EDDYNET System (Version 27).

For the MRPC examinations, all data was reviewed by displaying the 400 kHz or 300 kHz pancake coil data in the lissajous dsiplay along with the vertical component of the pancake and axial sensitive coils in strip chart form.

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

No depth sizing was performed with the MRPC

'ata.

Any tube containing a fiaw detected by the MRPC examination was repaired.

For the bobbin coil examination,'ll data was reviewed by displaying the 400 kHz in the lissajous display along with the vertical component of the differential and absolute mix outputs in strip chart form (where applicable).

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

All recordable indications were logged into the computer and stored on optical disk. The final report form summarizing all indications ) 20% TW (including IGA and PWSCC which is assumed to be

>20%) for each generator can be found in Tables 2-A and 2-B.

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

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LI F )20%

ICATI N AND REVI E INDICATI N NOMEN LAT E

T fLi. Information ROW -

ROW number from the tube identification, COL -

Column number from the tube identification.

VOLTS-IND.DESC.-

Amplitude of the measured indication signal response.

Type of damage mechanism.

% TWD -

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

INDICATION LOCATION-Reference point from which the indication was measured along with axial distance from that reference point.

Inform tion Under IND DESC.

ADI-ADS-Absolute DriftIndication Signal which is indicative of IGA.

Absolute DriftSignal which may be indicative of IGA.

CRI -

Circumferential Roll Transition Indication CPI -

Circumferential Plug Indication (B&WPlugs)

MAI-Multiple Axial Indication - MRPC identified or verified crevice indication(s).

MBS-MultipleAxialIndication below roll transition - Non-repairable MRPC signal below the roll transition Multiple Roll Indication - MRPC identified or verified axial roll transition indication(s).

NBI -

No braze in upper joint of B&Wsleeve NQI -

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

Non-Quantifiable Indication - Differential signal which may be indicative of SCC.

PI'F -

Parent Tube Flaw SAI -

Single Axial Indication - MRPC identified or verified crevice indication.

SVI -

Repairable Sleeve Indication (Plus-Point Probe)

SVS -

Non-Repairable Sleeve Indication (Plus-Point Probe)

Single Roll Indication - MRPC identified or verified axial roll transition indication.

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I F )20% INDI ATION AND REVICE INDI ATION N MEN LA E CON'T Information nder % TWD XX% -

The measured percent TW depth of the indication.

Inform tion nder INDI ATIONLOCATI N TEH -

Hot Leg Tube End (Bottom).

TSH -

Top of inlet tubesheet.

TSP-Tube Support Plate TEC -

Cold Leg Tube End (Bottom).

TSC -

Top of outlet tubesheet.

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

-XX.X-Axialdistance below the secondary face of the tubesheet or support plates where the indication is located.

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

OXH -

Tube Support Plate Location Hot Leg 1-6 OXC -

Tube Support Plate Location Cold Leg 14 12 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 3

1 12 5

11, 7

12 18 14 18 8

19 7

20 11 20 37 20 7

21 8

21

'10 21 11 21 13 21 15 21 16 21 10 22 11 22 SRI SRI MRI NQS SAI NQS ADS SAI 29 33

~o NQS CRI 23

>o 39 25

>o 32

>o 22 32

~o 23 22

~o 20 29 27

>o TEH + 2.7 TEH + 2.7 TEH + 2.9 TEH +11.2 TEH +13.3.to 14.5 TEH + 4.6 TEH + 6.3 TEH + 7.1 TSH + 2.6 TSH + 1.9 TEH + 5.3 TEH + 2.7 TSH + 1.7 TSH + 2.0 TSH + 1.2 TSH + 2.0 TSH + 2.3 TSH + 1.4 TSH + 1.1 TSH + 3.0 TSH + 1.9 TSH + 2.4 TSH + 2.9 Table 2-A Page 13 of 66

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S/G A 95MAR II GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 12 22 14 22 23 22 25 22 10 23 11 23 12 23 13 23 14 23 22 23 25 23 10 24 11 24 12 24 13 24 25

>o 26 4

25 29 20 NQI CRI MAI 26 20 4

26

>o 25 37

>o 20

~o 27

~o CRI NQS MAI 26 24

~o 26 4 23

~o 27 34

>o TSH + 2.3 TSH + 2.1 TSH + 2.8 TSH + 0.5.

TSH + 1.3 TEH + 4.9 TEH + 3.0 TEH + 4.1 TSH + 1.3 TSH + 2.7 TSH + 2.1 TSH + 2.1 TSH + 3.0 TSH + 2.3 TSH + 2.8 TEH + 3.0 TEH + 3.2 TEH + 3.1 to 4.7 TSH + 2.0 TSH + 2.0 TSH + 2.6 TSH + 2.9 TSH + 2.4 TSH + 2.9 Table 2-A Page 14 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 23 24 12 25 13 25 14 25 17 25 23 25 25 25 24 26 2

27 17 27 22 27 23 27 24 27 23 28 25 28 29

~o 26

>o 33 37 34

>o 22

~o ADS NQS 35

CRI, SRI MAI SAI SRI 32

~o 30

~o 20 27

~o 29

~o 23

~o 27

~o 25 26

~o 33 26 TEH +

TSH +

TEH +

3.6 to 1.1 2.6 2.7 3.1 to 6.3 to

14. 7 3.9 6.7 TEH + 2.7 TSH + 2.3 TSH + 3.0 TSH + 1.3 TSH + 2.1 TSH + 2.6 TSH + 1.8 TSH + 1.5 TSH + 1.5 TSH + 2.0 TSH'+ 2.3 TSH + 0.9 TSH + 1.5 TSH + 2.1 TSH + 2.4 TSH + 2.6 TSH + 2.2 TSH + 1.3 TEH + 3.7 to 12.4 Table Z-A Page 15 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 14 29 15 29 24 29 35 29 23 30 24 30 25 30 27 30 14 31 23 31 ADS 27 26 SRI 30

~o 22

~o 37

>o 20 SRI ADS ADS 34 4

33

'EH + 4.0 TSH + 3.0 TSH + 1.4 TEH + 2.9 TSH + 1.5 TSH + 2.0 TSH + 1.6 TSH + 1.3 TEH + 2.7 TEH + 3.2 to 5.5 TEH +13.3 to 16.1 TSH + 1.8 TSH + 2.4 26 31'0 32 22 32 20

~o 36

~o 35 34

>o TSH + 0.8 TSH + 2.6 TSH + 1.4 TSH + 2.0 23 32 27

~o 31

~o TSH + '1.9

-TSH + 2.4 26 32 21 33 22 33 28 20

~o 27

~o 34 TSH + 0.6 TSH + 1.5 TSH + 2.0 TSH + 2.1 Table 2-A Page 16 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 23 33 26 35

~o TSH + 1.9

'SH

+ 2.3 24 33 25 33 11 34 25 34 33

~o ADI 27

~o SAI ADI MAI 31

>o SAI TSH + 1.7 TEH + 4.4 TSH + 0.7 TEH + 3.6 to 4.1 TEH + 3.7 to 6.7 TEH + 4.0 to 5.0 TSH + 1.6 TEH + 4.4 to 4.7 26 34 12 35 20 35 21 35 23 35 26 35 4

36 12 36 20 36 23 36 SRI ADS MAI SAI SAI 24

~o 20 20 28 31 20 4

ADS SAI 21 23

~o SAI TEH + 3.4 TEH, + 3. 7 to

10. 3 TEH + 3.8 to 10.4 TEH +12.8 TEH +15.6 TSH + 2.2 TSH + 1.0 TSH + 2.1 TSH + 2.3 TSH + 1.3 TSH + 2.5 TEH + 3.2 to 8.2 TEH + 6.0 TSC + 3.0 TSH + 2.8 TEH + 4.2 to 4.6 Table 2-A Page 17 of 66

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S/G A 95MAR GINNA STATION Row 'ol REPORTABLE INDICATIONS Indication Location 26 36 38 36 3

37 12 37 22 37 23 37 25 37 42 37 36

~o MRI ADS ADS MAI 24

~o 20 23

~o 36 21

~o NQS TSH + 0.2 TEH + 3.1 TEH + 3.5 to 5.5 TEH + 4.0 to 5.7 TEH + 3.1 to 4.2 TSH + 1.6 TSH + 1.3 TSH + 2.3 TSH + 1.1 TSH + 2.2 TEH +17.5 to 10.9 10 38 ADS SAI TEH + 6.3 to 9.5 TEH + 9.2 to 10.1 19 38 22 38 23 38 25 38 26 38 18 39 26 20

~o MRI 21

>o 21

~o 27

~o 34

>o 21

~o 28

~o 23

>o TSC + 3.0 TSH + 2.3 TEH + 3.1 TSH + 1.7 TSH + 2.2 TSH + 0.3 TSH + 1.2 TSH + 1.5 TSH + 2.1 TSH + 2.6 Table 2-A Page 18 of 66

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- S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 25 39 26 39 31 39 8

40 18 40 24 40 26 40 35 40 19 41 22 41 24 41 25 41 26 41 29 41 34

'41 42 41 3

42 23

~o 20

>o 20

>o 24 4

26

>o SRI SRI 30 27

~o 23 20 SRI NQS MAI 23

~o 26

>o 31

~o 23

~o 27

~o 26

>o 21 SAI ADS ADS TSH + 0.9 TSH + 1.4 TSH + 2.0 TSH + 1.5 TSH + 2.5, TEH + 3.0 TEH + 2.8 TSH + 2.3 TSH + 1.6 TSH + 2.2 TSH + 2.8 TEH + 3.0 TEH + 4.6 to 7.7 TEH + 3.2 to 5.8 TSH + 0.9 TSH + 1.7 TSH + 1.1 TSH + 2.0 TSH + 1.6 TSH + 2.0 TSH + 2.6 TEH + 4.7 TEH + 5.6 TEH + 3.6 to 6.1 Table 2-A Page 19 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 16 42 CRI TEH + 2.6 25 42 26 42 27 42 29 42 20 4

20

~o 26

>o 21

~o 21

>o 27

>o 20

>o TSH + 0.8 TSH + 1.6 TSH + 1.8 TSH + 1.6 TSH + 2.2 TSH + 1.2 TSH + 1.8 37 42 21 43 25 43 33 43 34 43 42 43 22 44 33 44 38 44 40 44 41 44 21

~o 38 4

31 27

~o 20 ADS SRI SRI SRI NQS SRI SAI SRI MRI SRI SRI AV1 0.2 AV2 0.1 AV3 0.1 AV4 0.1 TSC + 2.1 TEH + 8.3 TEH + 3.0 TEH + 3.0 TEH + 3.0 TEH + 4.4 TEH + 2.7 TEH + 4.4 TEH + 2.8 TEH + 2.8 TEH + 3.1 TEH + 3.0 Table 2-A Page 20 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 4

45 12 45 19 45 25 45 29 45 NQI SAI 35

>o 34 21

>o 30

>o 34

>o TEH + 3.9 TEH + 3.6 to 4.1 TSH + 2.0 TSH + 3.4 TSH + 1.3 TSH + 0.2 TSH + 0.8 TSH + 1.3 31 45 35 45 1

46 25 46 26 46 24 47 31 47 32 47 24 48 28 48 NQI SAI PTF SRI ADS 26 SAI 37

~o 23

>o SAI 20 NQS CRI PTF ADS 21

~o 29

>o TEH +

4 '

TEH + 4.0 to 4.7 TEH +17.1 TEH + 3.1 TEH + 3.9 TSH + 1.0 TEH + 4.3 to 4.8 TSH + 1.1 TSH + 1.9 TEH + 3.2 to 3.5 TSH + 0.5 TEH + 5.5 TEH + 2.4 TEH +17.0 TEH + 3.4 to 6.9 TSH + 0.5 TSH + 1.4 Table 2-A Page 21 of 66

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S/G A 9 5MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 34 48 28 49 NQS 21 27

~o

'TEH + 6. 3 TSH + 0.3 TSH + 1.4 42 49 27 50 28 50 19 51 28 51 29 51 2

52 13 52 11 53 16 53 2

55 15

~ 55 16 55 17 55 27 55 28 55 ADS 23

~o 27

>o 29 26

~o NQS 21

~o 23

~o CRI 32

~o CRI 20

>o CRI SRI 28

~o CRI 26'o 21 0

27

>o SRI TEH + 4.2 to 6.4 TSH + 0.4 TSH + 1.3 TSH + 1.2 TSH + 1.6 TEH + 6.8 TSH + 1.0 TSH + 0.8 TEH + 3.4 TSH + 1.6 TEH + 3.1 TSH + 4.6 TEH + 3.4 TEH + 3.3 TSH + 3.9 TEH + 3.2 TSH + 4.1 TSH + 1.4 TSH + 1.9 TEH + 2.7 Table 2-A Page 22 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 35 55 37 55 13 56 16 56 29 56 22 57 1

58 7

58 12 58 19 58 22 58 23 58 24 58 31 58 10 59 15 59 18 59 24 59 25 59 MRI SRI CRI CRI 21

~o 27

~o ADS MRI CRI 28

~o 24

>o 31

~o 24

~o SRI CRI SAI 20

>o 23

~o 28

~o 20

~o TEH- + 3. 3 TEH + 3.0 TEH + 3.2 TEH + 3.3 TSH + 0.8 TSH + 1.4 TEH + 4.4 to 10.6 TEH + 3.4 TEH + 3.1 TSH + 1.7 TSH + 1.5 TSH + 1.4 TSH + 1.4 TEH + 2.9 TEH + 3.3 TEH + 4.0 TSH + 2.4 TSH + 1.5 TSH + 1.0 TSH + 1.3 Table 2-A Page 23 of 66

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,S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 28 59 3

60 15 60 9

61 15 61 16 61 17 61 19 61 27 61 15 62 19 62 28 62 13 63 18 63 19 63 26 63 2

64 14 64 18 64 ADS MAI SRI 23

~o 21 23 34

~o 24 29

~o MRI 21 23

~o SRI 24

~o 20 23

>o NQS ADS 26 21 TEH + 3.0 to 7.9 TEH + 2.9 to 5.3 TEH + 2.9 TSH + 2.0 TSC + 0.3 TSH + 2.0 TSH + 1.9 TSH + 1.5 TSH + 1.4 TEH + 2.6 TSH + 1.8 TSH + 1.9 TEH + 2.8 TSH + 2.1 TSH + 1.4 TSH + 1.5 TEH + 5.3 TEH + 2.7 to 10.3 TSH + 1.5 TSH + 1.4 Table 2-A Page 24 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 19

~ 64 20 64 6

65 10 65 15 65 24 65 25 65 7

66 10 66 11 66 14 66 18 66 19 66 22 66 28 66 10 67 11 67 13 67 32 21 29

~o SRI 24 34 SRI MAI MRI 20 26

~o 21 21 29 21 20 ADS SAI MAI 24 20 4

29 TSH + 1.2 TSH + 1.5 TSH + 1.3 TEH + 2.7 TSH + 0.6 TSH + 1.6 TEH + 2.8 TEH + 4.1 to 4.8 TEH + 2.9 TSH + 0.4 TSH + 0.8 TSH + 1.0 TSH + 1.6 TSH + 1.8 TSH + 1.6 TSH + 1.7 TEH + 3.8 to 10.3 TEH + 4.6 to 5.7 TEH + 3.0 to 4.6 TSH + 1.0 TSH + 1.2 TSH + 1.7 Table 2-A Page 25 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 18 67 22 67 27

~o MAI PTF TSH + 2.0 TEH + 3.6 to 4.6 TEH +18.9 28 67 8

68 11 68 12 69 19 69 SAI ADS SAI SAI SAI 21

~o 24

~o 20

~o CRI TEH + 3.3 to 3.7 TEH + 3.0 to 7.8 TEH + 3.8 to 4.0 TEH + 3.1 to 3.8 TEH +.4.8 TSH + 1.6 TSH + 1.6 TSH + 0.8 TEH + 3.0 22 69 11 70 14 70 27 70 4

71 13 71 16 71 5

72 8

72 NQS CRI MAI 20 21

~o SRI SRI 21

~o SVS 21

~o 23

~o 31

~o TEH + 4.0 to 10.4 TEH + 2.3 TEH + 3.6 to 6.8 TSH + 1.2 TSH + 1.8 TEH + 2.8 TEH + 2.3 TSH + 1.8 TEH +25.3 TSH + 0.6 TSH + 1.0 TSH + 1.6 Table 2-A Page 26 of 66

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S/G A 95MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 12 72 15 72 19 72 25 72 6

73 8

73 12 73 16 73 23 73 28 73 8

74 12 74 4

75 10 75 12 75 18 75 2

76 12 76 15 76 20 SRI SAI SRI 20 24 30 CRI MRI SAI 26

>o 29 0

24 SRI

.20

>o CRI NQI SAI SAI 23

~o SRI TSH + 1-1 TEH + 2.6 TEH + 3.8 to 4.5 TEH + 2.6 TSH + 0.7 TSH + 0.9 TSH + 1.3 TEH + 2.8 TEH + 3.2 TEH + 3.3 to 4.5 TSH + 0.7 TSH + 0.6 TSH + 1.2 TEH + 2.2 TSH + 1.1 TEH + 2.3 TEH + 3.8 TEH + 4.0 TEH + 2.6 to 3.9 TSH + 0.5 TEH + 2.9 Table 2-A Page 27 of 66

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S/G A 95MAR GINNA STATION

'I Row Col REPORTABLE INDICATIONS Indication Location 23 76 28 79 9

87 18 87 1

89 15 90 11 91 SRI ADS SRI ADS 31

~o ADS 28

'EH + 2.8 TEH + 4.8 to 4.3 TEH + 2.9 TEH +13.5 TSH +11.4 TEH + 5.2 to 3.5 TSH + 0.9 Number of Tubes:

259 Number of Indications:

356 Table 2-A Page 28 of 66

R.

G.

& E;

~

S/G 95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 7

9 2

15

,10 15 3

16 5

16 28 16 7

17 8

17 10 17 11 17 14 17 21 17 24 17 3

18 24 18 29 18 5

19 6

19 MAI SVS NQS SAI NQI MAI PTF NQS SAI PTF NQI MAI NQS MAI NQI SRI SAI MAI PTF 22 22 NQS SAI MAI ADS ADS SVS SVS NQI NQS TEH + 4.3 TEH +24.1 TEH + 6.3 TEH + 6.3 to 6.8 TEH + 4.3 TEH + 3.8 to 4.9 TEH +18.5 TEH + 4.0 TEH + 3.8 to 4.9 TEH +18.1 TEH + 3.3 TEH + 2.6 to 3.6 TEH + 3.3 to 6.7 TEH + 3.2 to 4.6 TEH + 4.1 TEH + 2.9 TEH + 3.4 to 3.7 TEH + 4.0 to 4.4 TEH +18.0 TSH + 0.7 TSH + 0.6 TEH + 4.3 TEH + 4.1 TEH + 3.3 to 3.9 TEH + 3.1 to 6.4 TEH + 4.0 to 5.4 TEH +21.3 TEH +21.8 TEH + 3.3 to 8.2 TEH + 5.0 Table 2-B Page 29 of 66

R. *G.

& E.

~

Row Col 8

19 14 19 24 19 31 19 33 19 5

20 10 20 11 20 12 20 14 20 16 20 19 21 8

22 12 22 19 2.2 5

23 11 23 15 23 16 23 S/G 95 MAR REPORTABLE INDICATIONS Indication CRI NQI MAI SAI SVS NQS MAI 23 NQS MAI 20 ADS MAI ADS ADS SAI SAI ADS MAI NQI 22 ADS CRI 34 20 25 Table 2-B Page 30 of 66 GINNA STATION Location TEH +,2. 9 TEH + 3.1 to TEH + 3.0 to TEH + 3.1 to TEH +21.8 TEH + 4.3 TEH + 3.9 TSH + 1.4 TEH + 5.3 TEH + 5.0 to TSH + 1.0 TSH + 1.0 TEH + 3.1 to TEH + 3.1 to TEH + 3.1 to TEH + 3.5 to 4.3 5.2 5.2 7.2

'6.5 4.9 6.5 5.2 TEH + 4.1 to 4.9 TEH + 4.8 TEH + 3.2 to TEH + 3.2 to TEH + 7.3 7.3 7.5 TSH + 4.0 TEH + 3.2 'to TEH + 2.3 6.9 TSH + 1.0 TSH + 1.7 TSH + 0.9

R.

G.

& E.

S/G B

95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 19 23 22 23 26 23 12 24 15 24 20 24 21 24 22 24 5

25 13 25 20 25 21 25 22 25 16 26 17 26.

18 26 19 26 20 26 21 26 24 26 26 26 6

27 ADS MAI SRI CRI 22

>o ADS 21

~o 21

>o ADS SAI 28

~o NQI CRI 21

>o 28 30

<o.

29 32

>o 25 MRI 35 SRI 26

~o 20

~o H

TEH + 3.5 to 5.7 TEH + 2.7 to 4.5 TEH + 2.5 TEH + 2.6 TEH + 3.2 to 4.8 TEH + 3.7 to 4.8 TSH + 1.1 TEH + 2.5 to 6.0 TSH + 1.4 TSH + 0.3 TEH + 3.5 to 7.7 TEH + 3.8 to 5.0 TSH + 1.2 TEH + 4.8 TEH + 2.5 TSH + 1.3 TSH + 1.0 TSH + 1.4 TSH + 1.2 TSH + 1.2 TSH + 1.2 TEH + 3.7 TSH + 1.2 TEH + 2.6 TSH + 0.9 TSH + 0.2 Table 2-B Page 31 of 66

R.

G.

& E.

S/G B

95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 8

27 23 27 27 27 27 28 23 29 1

30 17 30 21 30 6

31 34 31 9

32 12 32 18 32 3

33 1

34 7

34 40 34 42 34 3

35 6

35 7

35 12 35 NQI 31

~o NQI CRI SAI 26 4'2

~o ADS 21

~o SRI NQS NQI MAI SRI MAI.

ADS ADS ADS MAI ADS MAI SAI ADS SRI ADS 89

<o TEH + 5.4 TEH + 4.4 to TEH + 2.3 TEH. + 4.1 to TEH + 5.0 to 4.9 4.9 8.2 TEH + 6.7 to 8.2 TEH + 2.4 to 5.1 TEH + 3.1 to 4.4 TEH + 2.5 to TEH + 2.8 to TEH'

3. 2 TEH + 2.5 to TEH + 2.3 TEH + 7.5 TEH + 2.5 4.3 3.9 8.3 TEH + 6.2 TSH + 1.5 TEH + 4.4 TEH + 2.4 TEH + 3.9 TSH + 0.6 TSH + 1.3 TEH + 4.4 to 9.4 TSH + 2.1 TEH + 3.2 TEH + 3.5 t'o 11.3 Table 2-B Page 32 of 66

R.

G.

& E.

~

S/G B

95 MAR GINNA STATION Row Col REPORTABLE. INDICATIONS Indication Location 20 35 NQS MAI TEH + 8.7 to TEH +11.5 to 13

~ 3

14. 1 9

36 22 36 22 37 5

38 7

38 24 39 45 39 8

40 13 40 24 40 25 40 34 40 4

41 23 41 24 41 2

42 4

42 5

42 6

42 CRI SVS SRI SRI SAI NQI 27

~o 33 ADS MA1 SRI ADS 27

>o 25

~o SVI 22

~o 21

~o I

39 ADS ADI MAI SAI ADI TEH + 2.6 TEH +23.9 TEH + 2.6 TEH + 2.3 TEH + 3.8,to 5.3 TEH + 3.5 TSH + 0.8 TSH +42.1 TEH + 3.8 to TEH + 3.9 to TEH + 2.5 TEH + 2.8 to TSH + 1.2 10.6 11.1 8.4 TEH + 3.2 to TEH + 3.0 -to 6.5 4.8 TEH + 4.2 TEH + 3.5 to 6.9 TSH + 2.3 TEH +24.4 TSH + 0.4 TSH + 1.5 TSH + 0.9 TSH + 1.4 TEH + 2.4 to 11.6 25 42 NQS TEH + 3.0 to 8.7 Table 2-B Page 33 of 66

R.

G.

& E.

S/G B

95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 25 43 27 44 5

45 3

46 13 46 10 47 25 48 36 48 38 49 39 49 25 '0 SAI 22

~o ADS MAI MRI NBI SAI 24 NQS MAI ADS SAI ADS NQS 26

~o TEH + 3.8 TSH + 2.3 TEH + 5.4 TEH + 2.8 to TEH + 2-5 TEH +34.5 TEH + 4-4 TSH + 3.4 TEH + 3.2 to TEH + 3.1 to TEH + 3.6 to TEH + 3.3 to TEH + 3.9 to TEH + 3.1 to TSH + 3;2 9.6 7.0 8.2 6.5 4.2 6.6 6.7 43 50 2

51 6

51 7

51 8

52 33 52 36 52 37 52 41 52 ADS SVS 21

~o SRI 20

>o ADS MAI NQI MAI NQI CRI ADS TEH +22; 5 TSH + 0.3 TEH + 2.7 TSH + 0.4 TEH + 3.4 to TEH + 3.0 to TEH + 3.3 to TEH + 3.7 TEH + 5.6 TEH + 2.7 TEH + 3.8 9.1 10.0 4.9 TEH + 3.2 to 4.7 Table 2-B Page 34 of 66

0 0

0

R.

G.

& E; S/G B

95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 43 52 5

53 7

53 12

- 53 25 53 36 53 41 53 42 53 1

54 31 54 38 54 18 55 37 55 ADS SAI NQS SAI SRI SAI 22

~o NQS SRI SRI OBS 94 OBS NQS 39

>o MAI NQI TEH + 3.0 to 3.7 TEH + 3.3 TEH + 8.0 TEH + 4.8 TEH +

TEH +

TSH +

2.9 5.1 to 5.3 4.0 TEH + 4.4 TEH + 2.9 TEH + 2.9 TEH + 2.7 TEH + 5.7 TSH + 1.8 TEH + 4.6 to 7.4 TEH + 3.3 to 12.1 37 56 39 56 1

57 16 57 37 57 30 58 2

59 NQI NQS "OBS NQS NQS CRI SVI 5

56 MRI 36 56 NQI TEH + 2.5 TEH + 3.3 to 7.1 TEH + 3.6 to 8.9 TEH + 8.4 TEH +11.3 TEH + 3.1 to 6.1 TEH + 2.8 TEH +22.6 Table 2-B Page 35 of 66

e

R.

G.

& E.

~

S/G B

95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 11 59 37 59 16 60 30 60 34 60 36 60 3

61 5

61 14 61 16 61 NQI NQI NQS CRI

, SAI CRI NQI NQI ADS ADS NQS SAI ADS TEH + 4.7 TEH + 6.8 TEH + 3.8 to 4.9 TEH + 3.1 to 6.8 TEH + 6.8 TEH + 7.1 TEH + 4.7 to

'7.4 TEH + 2.3 TEH + 5.0 TEH + 2.9 TEH + 3.4 to 4.4 TEH + 3.5 to 4.9 TEH + 3.4 to 9.1 5

62 20 62 21 62 13 63 22 63 23 63 29 63 ADS ADS MAI ADS MAI NQS 22 21 MRI ADS 20 MAI TEH + 3.3 to TEH + 7.1 to TEH + 7.3 to TEH + 7.3 to TEH + 7.1 to TEH + 5.6 TSH + 1.8 TSH + 2.0 TEH + 2.7 TEH + 4.9 to TSH + 1.2 TEH + 4.9 to 9.4 15.3 14.7 9.9 9.6 9.1 9 '

37 63 15 64 26 64 ADS ADS 24 TEH + 4.9 to TSH + 1.9 8.9 TEH + 5.4 to 10.2

. Table 2-B Page 36 of 66

R.

G.

& E.

S/G B

95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 37 64 5

65 14 65 ADS ADS NQS SAI TEH + 6.7 TEH + '3.6 to TEH + 4.9 TEH + '4.4 to 7.9 5.0 22 65 38 65 16 66 19 66 22 66 26 66 18 67 20 67 23 67 29 67 21 68 29 69 4

70 2

71 13 71 16 71 19 72 MRI NQI MAI ADI MAI NQI MAI ADS SAI SAI NQS NQI SRI NQI MRI ADS SVS NQI ADS ADS MAI TEH + 2.8 TEH + 3.5 TEH + 3.4 to TEH + 3.8 to TEH + 3.2 to TEH + 3.9 to TEH + 4.3 to TEH + 3.3 to 4.2 15.7 4.9 7.3 4.6 5.3 TEH + 3.7 to 4.3 TEH + 5.9 TEH +11.0 to 17.6 TEH + 2.5 TEH + 4.5 TEH + 3.1 TEH + 2.9 to 7.1 TEH +24.7 TEH + 4.9 TEH + 3.8 to 6.9 TEH + 3.5 to TEH + 3.7 to 16.6 9.9 TEH + 3.5 to 4.1.

Table 2-B Page 37 of 66

S/G B

95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 16 74 24 74 29 74 6

75 10 75 1

76 15 76 32 76 33 76 23 77 5

78 10 78 5 '9 4

80 6

80 21 81 11 82 6

83 7

83 8

83 ADS CRI SAI ADS ADS ADI 20

>o ADS SAI NQS SAI SAI ADS ADS ADS ADS MAI ADS SAI ADS ADS ADS ADS SAI NQS ADS SAI TEH + 4.7 TEH + 2-9 TEH + 3.9 to '.1 TEH + 3.2 to 6.0.

TEH + 4.5 TEH + 4.9 to 7.4 TSH + 0.7 TEH + 3.6 to 11.3 TEH + 3.5 to 4.3 TEH + 4.6 to 8.9 TEH + 4.9 to 6.0 TEH + 3.4 TEH + 5.5 TEH + 7.0 TEH + 3.2 to 7.2 TEH + 3.2 to 9.0 TEH + 3.4 to 9.4 TEH + 3.1 to 6.3 TEH + 3.0 to 7.9 TEH +11.0 TEH + 3.5 to 6.0 TEH + 7.8 TEH + 3.5 to 5.7 TEH + 2.8 TEH + 3.5 to 15.1 TEH + 4.8 to 11.9 TEH + 9.9 to 10.7 Table 2-B Page 38 of 66

e

R.

G.

& E.

~

S/G B

95 MAR GINNA STATION Row Col REPORTABLE INDICATIONS Indication Location 18 84 8

88 12 88 13 88 14 88 15 88 16 88 17 88 14 89 4

90 8

91 1

92 6

92 ADS ADS MBS MBS MBS MBS MBS MBS MBS ADS ADS 25

~o 29

>o TEH + 5.5 to 12.4 TEH + 4.1 to 20.2 TEH + 0.4 to 1.2 TEH + 0.5 to 1.5 TEH + 0.3 to TEH + 0.3 to 1.3 1.3 TEH + 0.2 to 1.0 TEH + 0.0 to TEH + 0.5 to 1.4 1.3 TEH + 3.7 to 6.8 TEH + 7.2 to 22.0 TSH +10.8 TSH + 5.9 Number of Tubes:

217 Number of Indications:

280

, Table 2-B Page 39 of 66

4.0 QBBRRVATI N'he 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 80 new crevice indications reported.

In the "A" steam generator, 35 new crevice indications were reported, The majority of the inlet tubesheet crevice corrosion indications are IGA/SCC I

'I of the Mill Annealed Inconel 600 tube material.

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

This environment has developed over the years as deposits and active species such as sodium and phosphate, have reacted, changing a neutral or inhibited crevice into the aggressive environment that presently exists.

Table 3 shows the steam generator IGA/SCC history.

Page 40 of 66

0

Ginna Steam Generators Crevice Corrosion Indication History Not Sizeable A PPj@Bj 1-25%

A

~'."',.".-"',:.',>B";

26-50%

51-75%

A;.>,::g.B';

76-100%

A '".:',~";.i!BJ TOTAL A P~~.,;g6B';

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 IVIar 1989 Apr 1990 Apr 1991 Apr 1992 Mar 1993 IVlar 1994 Mar 1995 0 gee:4':.! 0<

0 'l" >':~'~>0' k(<q&:.,23~>

17:,'"',:"".,'.:;:":jg82-':.'

j$!!::::x,'22 16

~),":.:,.1 08'4 2,,<~,:j<<42;"

33

";;:i-,:.1 0'4':;

114

&","..',"(1::10",

160;';:~!132:.

88

(';:;: 106;:

0,<>>;..;)..p1 p <<<<.)::<>dp>

1

~j:;:::.',:.';:;:;3~j

<@:.': <<'.><9 (

p j>g<<<.'...i >0"'.

0:,'g,':",:.-;,',i:Q '.

p

~@2~,.AQ'>

0 i:,.-:-!;';;1;.

'4>.<<

P

.> 4:;'.:",.>0 <

,: ,:,; ~'.,

Q

<<Cj'-":>>.,'P>pg p i <>'< ~"'0<<

0 P '(','0!

>>,x O <<:-;.";:.:,':1-';

0;--;";;';9;1 5',',

Q::

<<'><6.i p

..<<.gi?'<] )

o

'-:.'::.':."::.,.,:iI,::

0

<<"',.'::,::.>",.'jO)

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<<>.'::.".":,4'.;.

3 '"':-::'"8I

, )

0;

~ '.'-:".6 p

j'."::<:,'n'<<Q'<.'

-.':'::,">',i:,0:.

o

='-,.-',,'"...;.:.'-o'~

Q <<<<<,./2 0--

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0:",-';:::::,;:.1~

0 'i'< ".6~

0

<<'.,',:.";:~,6;"::

p,.r,., p,]p 1 $,.-':.'=::i::;:;9)'

<<".";().,;:;,1'4.'.';!..',

"1'6;::;

2 "">iM:,'":7<'

g,':.':.,".,",'""..:,1 ~

6

~'":.':.:,"';:<8',:.

2 '.".:

.':12<

';"'::<<s~>'<>3x

,.:,:>< ~',"',

0 <<.',,.,',;,,0$

P@'><<":.

1 Nj-';274 13 i~",'P46I 2

"<.:.,:,@i1;1i<

0 g~w:.':,.:4':(

14 7:;,',"',,;1>8,

1 ":"""'12'"

rj>)':>>>$)Q 24:.",',~i;>,;268j 38 i~w:.:;".-'.,:1 57'0,,.,;...,,,79.

34

(:::,",."$

1:,18'?'"

".1 23:

',: I:.".:133;',

',": :,:j<<1,0$'.

121 161 88

~',

0 i<<<..:.':'.:,'.:..'!."':::>2I 0

~~j';'::::":::;:,1'1j~

O I~""""'3'-

Q I X.<<j<,;Y<<1'3 $

34 k.:.::,.":;:::;-::;:153:<

7

<<~:;:,":::::,".-".:..."."'41I:::

0 TOTALS:

464 3<.',~948'.:

5 pq,',"-.-,:.-',..29r 5 ';.-'.".68';

TABLE 3 21

<<..'.-1'49.

55

<~"'.::)303j 550

(:;-.";;1',"497,,',: "

Page 41 of 66

Along with IGA/SCC in the crevices, there appears to have been a slight decrease in PWSCC at the roll transition during the last operating cycle. This mechanism was first addressed in 1989 and this year there were 32 Roll Transition (PWSCC) indications in "B" steam generator and 60 Roll Transition (PWSCC) indications in "A" steam generator.

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

A large volume, typically (20% TW, wastage type condition exists just above the tubesheet secondary face of both generators.

A small percentage of the I

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

A number of these tubes did have penetrations )20% TW but have not shown an increase in the growth rate for several cycles.

It is believed that th'ese wastage indications were caused by the original water chemistry when phosphate was used as a buffering medium.

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

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 Page 42 of 66

generator, and in most cases was of greater magnitude in size than that at the tubesheet secondary side face.

In general, minor distortions of most of the tube support signals were seen.

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

Comparison with previous data indicates no changes in the denting have been observed since previous inspections.

Eleven (11) indications in the CE welded sleeves (1 in S/G "A"and 10 in S/G "B") were reported as a consequence of the use of the Zetec, Inc. "Plus-Point" probe.

This probe provides improved resolution characteristics which enable the data analysis personnel. the capability of readily determining the existence of degradation in either the parent tube or the sleeve.

The indications in question resembled blowhole type indications which had been previously reported at Zion during early 1995.

Subsequent visual examination of the indications verified two (2) blowholes, one of which (the indication in S/G "A")

was left in service due to the fact that it was located in the upper region of the weld. Eight (8) of the remaining indications in S/G "B" were determined to be a result of "weld tail-off" when examined visually. The indication in Row 34, Column 40 was found to be a result of an "arc strike" and an incomplete Page 43 of 66

weld in the upper expansion zone.

(Subsequent review of the "Plus-Point"

)

eddy current data confirmed the absence of a heat affected zone).

As a result of the discovery of the incomplete weld in Row 34, Column 40, additional visual and ultrasonic examinations were performed on an expanded sample of CE welded sleeves.

One (1) additional sleeve (Row 41, Col 42) was found with an incomplete weld and six (6) sleeves were determined by ultrasonics to contain welds with incomplete fusion. The result of the expanded inspections was that a total of ten (10) CE welded sleeves were plugged. In addition, two (2) B&W brazed sleeves were repored with PWSCC indications at the lower joint and one (1) BLW brazed sleeve was found to be without a braze in the upper joint.

In summary, the "A"Steam Generator had 88.tubes that were found to have "new" tubesheet crevice'indications (60 PWSCC, 35 IGA/SCC, 7 both IGA/SCC and PWSCC).

The "B" Steam Generator had 106 "new" tubesheet crevice indications (32 PWSCC, 80 IGA/SCC, 6 both IGA/SCC and PWSCC).

Additionally 14 sleeved tubes were plugged (3 obstructed, 2 with PWSCC, 1

"blowhole", 2 unwelded and 6 unfused), accounting for a total of 120 repairs in the "B" Steam Generator.

A Non-Conformance Report (NCR) was written on the ABB-CE.sleeves containing incomplete welds or incomplete fusion and a 10CFR50.59 Safety Page 44 of 66

Evaluation was performed.

This evaluation coupled with structural analysis and mechanical testing data provided by ABB-CE determined that the absence of a complete weld or complete fusion in the subject sleeves did not constitute a substantial safety hazard and did not require reporting pursuant to 10CFR50.72.

Additional information regarding this condition is contained in NCR's95-029 dated 4/15/95.

Page 45 of 66

5.0 RRECTIVE A TI N

~

Table 4 has been generated to identify tubes with crevice indications or with indications which exceed the repair criteria.

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

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

a) quantifiable and non-quantifiable IGSCC indications on the 400/100 kHz differential mix data b) roll transition or crevice indications as identified from the MRPC examination The breakdown of corrective action (repairs) performed are as follows:

The A steam generator had a total of 88 tubes with indications identified by eddy current, providing a total of 88 repairs.

The B steam generator had a total of 106 tubes with indications identified by eddy current.

Three (3) sleeved tubes were obstructed, two (2) sleeved tubes had eddy current indications representative of PWSCC, one (1) sleeved tubes had a blowhole indication in the lower portion of the weld, two (2) sleeved Page 46 of 66

t tubes had incomplete welds and six (6) sleeved tubes had welds with incomplete fusion and all were subsequently plugged.

A total of 120 repairs were made in B steam generator.

A Ginna Steam Generator Tube Inspection and Corrective Action History has been tabulated on page 68 as Table 5.

Page 47 of 66

ROW

~

~ lt ~

~

~ g

~

~ g

~

~ g

~

~ Q

~

39 g

~

X..

~

X X

~

~ X oXXX.

~

~ B o

~

~ X ~

~

~ B

~

~ X ~

~

~ X

~

X

~

~ '

~

~ X ~

~

~ X

~

X X

~

~ X

~

~ X

~

X

~

~ X ~

~

~ X ~

~

~ X X ~

~

~ X ~

~

XX

~

~ X ~

~

~ X ~

~

~ X

~ I

~

~ X ~

'X

~

FAX

~

~ X ~

~

X

~

~ X B ~ X.

~

~ X ~

~

X ~

~

~ X ~

~

29

~

~ X

~

~ X

~

X

~

X'

~

XX X

~

X X

~

~ X ~

~

~ X

~

~ X ~

~

~ X ~

~

X'X X ~

~

~ X

~

~ X ~

~

X

~

~ X ~

~

~ X ~

~

N

~

~ X ~

~

~ X ~

~

'X

~

~ X ~

~

~ X

~

~ X

~

~ X

~

12

~

~ X ~

~

~ X ~

~

~ X ~

~

l1

~

~ X ~

~

X.

~

~ X

~

~ X ~

~

~ ~: ~

~

X

~

X

~

72 BB COL 98 84 78 18t CE Mechanical Plugs W:

8>

CE Welded Plugs X:

75:

BSW Explosive Sleeves B:

3!

BSW Sleeve Plugs 68 54 48 42 36 Rochester Gas 8 Electric Corp.

Ginna Nuclear Power Station SiG - A.

85184/95 Inlet FIGURE 2 ACRI ISIS Tubes

R.

G.

& E.

~

S/G A 95MAR GINNA STATION Row Col REPAIRABLE INDICATIONS Indication Location Repair 3

1 12 5

11 7

12 18 8

19 7

21 25 22 SRI SRI MRI SAI SAI CRI NQI CRI MAI TEH + 2.7 TEH + 2.7 TEH + 2.9 TEH +13.3 to 14.5 TEH + 7.1 TEH + 2.7 TEH + 4.9 TEH + 3.0 TEH + 4.1 CE Mech Pl CE Mech Pl CE Mech Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve 22 23 25 23 24 26 CRI MAI CRI SRI MAI SAI TEH + 3.0 TEH + 3.1 to TEH + 2.6 TEH + 2.7 TEH + 3.1 to TEH + 6.3 to 4.7 3.9 6.7 B&W Sleeve B&W Sleeve B&W Sleeve 2

27 35 29 27 30 25 33 11 34 SRI SRI SRI ADI SAI ADI MAI TEH + 2.7 TEH + 2.9 TEH + 2.7 TEH + 4.4 TEH + 3.6 to 4.1 TEH + 3.7 to 6.7 TEH + 4.0 to 5.0 B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve 25 34 26 34 SAI SRI TEH + 4.4 to 4.7 TEH + 3.4 B&W Sleeve B&W Sleeve Table 4-A Page 49 of 66

0

R.

G.

& E.

~

S/G A 95MAR

,GINNA STATION REPAIRABLE INDICATIONS Row Col Indication Location Repair 12 35 4

36 l

23 36 38 36 12 37 10 38 22 38 31 39 8

40 35 40 19 41 34 41 16 42 33 43 34 43 42 43 22 44 33 44 38 44 MAI SAI SAI SAI SAI MRI MAI SAI MRI SRI SRI SRI MAI SAI SAI CRI SRI SRI SRI SRI SAI SRI MRI TEH + 3.8 to 10.4 TEH +12.8 TEH +15.6 TEH + 6.0 TEH + 4.2 to 4.6 TEH + 3.1 TEH + 3.1 to 4.2 TEH + 9.2 to 10.1 TEH + 3.1 TEH + 3.0 TEH + 2.8 TEH + 3.0 TEH + 3.1 to 5.0 TEH + 3.2 to 5.8 TEH + 4.7 TEH + 2.6 TEH + 3.0 TEH + 3.0 TEH + 3.0 TEH + 2.7 TEH + 4.4 TEH + 2.8 TEH + 2.8 B&W Sleeve B&W Sleeve B&W Sleeve CE Mech Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve CE Mech Pl B&W Sleeve B&W Sleeve CE Mech Pl Table 4-A Page 50 of 66

0

R.

G.

& E.

~

S/G A 95MAR GINNA STATION Row Col REPAIRABLE INDICATIONS Indication Location Repair 40 44 41 44 4

'45 SRI SRI NQI SAI

'TEH + 3.1 TEH + 3.0 TEH + 3.9 TEH + 3.6 to 4.1 CE Mech Pl CE Mech Pl B&W Sleeve 31 45 35 45 25 46 24 47 32 47 2

52 11 53 2

55 15 55 16 55 28 55 35 55 37 55 13 56 16 56 7

58 NQI SAI PTF SRI SAI SAI CRI PTF CRI CRI CRI SRI CRI SRI MRI SRI CRI SAI CRI MRI TEH + 4.0 TEH + 4.0 to TEH +17.1 TEH+

3

~ 1 TEH + 4.3 to TEH + 3.2 to TEH + 2.4 TEH +17.0 TEH + 3.4 TEH + 3.1 TEH + 3.4 TEH + 3.3 TEH + 3.2 TEH + 2.7 TEH + 3.3 TEH + 3.0 TEH + 3.2 TEH + 4.2 TEH + 3.3 TEH + 3.4 4.7 4.8 3.5, B&W Slv Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Slv Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve CE Mech Pl B&W Sleeve B&W Sleeve B&W Sleeve Table 4-A Page 51 of 66

0

R.

G.

& E.

~

S/G A 95MAR GINNA STATION REPAIRABLE INDICATIONS Row Col Indication Location Repair 12 58 31 58 10 59 28 59 3

60

,27 61 28 62 6

65 24 65 25 65 7

66 22 66 28 66 22 67 28'7 8

68 CRI SRI CRI SAI MAI SRI MRI SRI MAI SRI SRI MAI MRI SAI MAI MAI PTF SAI SAI SAI SAI TEH + 3.1 TEH + 2.9 TEH + 3.3 TEH + 4.0 TEH + 2.8 to 5.3 TEH + 2.9 TEH + 2.6 TEH + 2.8 TEH + 3.8 TEH + 2.7 TEH + 2.8 TEH + 4.1 to 4.8 TEH + 2.9 TEH + 4.6 to 5.7 TEH + 3.0 to 4.6 TEH + 3.6 to 4.6 TEH +18.9 TEH + 3.3 to 3.7 TEH + 3.8 to 4.0 TEH + 3.1 to 3.8 TEH + 4.8 B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Slv Pl B&W Sleeve B&W Sleeve 19 69 22 69 CRI CRI MAI TEH + 3.0 TEH + 2.3 TEH + 3.6 to 6.8 B&W Sleeve B&W Sleeve Table 4-A Page 52 of 66

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& E.

~

S/G A 95MAR GINNA STATION REPAIRABLE INDICATIONS Row Col Indication Location Repair 27 70 4

71 15 72 19 72 25 72 16 73 23 73 28 73 4

75 12 75 18 75 2

76 15 76 23 76 9

87 SRI SRI SRI SAI SRI CRI MRI SAI SRI CRI NQI SAI SAI SRI SRI SRI TEH + 2.8 TEH + 2.3 TEH + 2.6 TEH +-3.8 to 4.5 TEH + 2.6 TEH + 2.8 TEH + 3.2 TEH + 3.3 to 4.5 TEH + 2.2 TEH + 2.3 TEH + 3.8 TEH + 4.0 TEH + 2.6 to 3.9 TEH + 2.9 TEH + 2.8 TEH + 2 '

B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve, B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve CE Mech Pl Number of Tubes:

88 Number of Entries:

111 Table 4-A Page 53 of 66

ROW

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12 71 COL 89 83 77 Ni 11:

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BLM Explosive Sleeves B!

8:

BSM Sleeve Plugs 65 59 47 41 35 29 23 Rochester Gas 8 Electric Corp.

Ginna Nuclear Power Station S/G - B 85/84i95 Inlet FIGURE 3 ACRI ISIS Tubes

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S/G B

95MAR GINNA 'STATION REPAIRABLE INDICATIONS Row Col Indication Location Repair 7

9 10 15" 3

16 5

16 28 16 7

17 8

17 14 17 21 17 5

19 8

19

'14 19 MAI SAI NQI MAI PTF SAI PTF NQI MAI MAI NQI SRI SAI MAI PTF SAI MAI NQI CRI NQI MAI TEH + 4.3 TEH + 6.3 to TEH + 4.3 TEH + 3.8 to TEH +18.5 TEH + 3.8 to TEH +18.1 TEH + 3.3 TEH + 2.6 to TEH + 3.2 to TEH + 4.1 TEH + 2.9 TEH + 3.4 to TEH + 4.0 to TEH +18.0 TEH + 4.1 TEH + 3.3 to TEH + 3.3 to TEH + 2.9 TEH + 3.1 to TEH +,.3.0 to 6.8 4.9 4.9 3.6 4.6 3.7 4.4 3.9 8.2 4.'3 5.2 B&W Sleeve B&W Sleeve B&W Slv Pl B&W Slv Pl CE Mech Pl B&W Sleeve B&W Slv Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve 24 19 33 19

'I 10 20 14 20 8

22 12 22 19 22 SAI MAI MAI SAI SAI MAI TEH + 3.9 TEH + 5.0 to TEH + 3.1 to TEH + 4;1 to TEH + 4.8 TEH + 3.2 to 7.2 4.9 4.9 7.5 TEH + 3.1 to 5.2 B&W Sleeve CE Mech Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve Table 4-B Page 55 of 66

R.

G.

& E.

~

S/G B

95MAR GINNA STATION REPAIRABLE INDICATIONS Row Col Indication Location Repair 5

23 11 23 19 23 22 23 26 23 12 24 15 24 13 25 21 25 22 25 21 26 24 26 8

27 27 27 21 30 34 31 9

32 12 32 7

34 40 34 42 34 6

35 NQI CRI SRI CRI MAI SAI NQI CRI CRI MRI SRI NQI NQI CRI SAI SRI NQI MAI SRI MAI MAI MAI SAI SRI TEH + 7.3 TEH + 2.3 TEH + 2.7 to 4.5 TEH + 2.5 TEH + 2.6 TEH + 3.2 to 4.8 TEH + 3.7 to 4.8 TEH + 3.8 to 5.0 TEH + 4.8 TEH + 2.6 TEH + 2.5 TEH + 3.7 TEH + 2.6 TEH + 6.2 TEH + 4.4 TEH + 2.4 TEH + 3.9 TEH + 3.2 TEH+ 5 ~ 4 TEH + 4.4 to 4.9 TEH + 2.3 TEH + 4.1 to

'4.9 TEH + 3.1 to 4.4 TEH + 2.8 to 3.9 TEH + 3.2 TEH + 2.3 B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve CE Mech Pl CE Mech Pl B&W Sleeve Table 4-B Page 56 of 66

R.

G.

& E.

~

I S/G B

95MAR GINNA STATION REPAIRABLE INDICATIONS Row Col Indication Location Repair 12 35 20 35 9

36 22 37 5

38 I

7 38 24 39 8

40 13 40 34 40 4,

42 5

42 6

42 31 42 41,42 25 43 5

45 3

46 13 46 10 47 36 48 38 49 7

51 89

>o MAI CRI SRI SRI SAI NQI MAI SRI SVI ADI MAI SAI ADI Inc. Fusion Inc. Weld SAI MAI MRI NBI SAI SAI SRI TEH + 2.5 TEH +11.5 to 14.1 TEH + 2.6 TEH + 2.6 TEH + 2.3 TEH + 3.8 to 5.3 TEH + 3.5 TEH + 3.9 to 11.1 TEH + 2.5 TEH +24.4 TEH + 3.2 to TEH + 3.0 to TEH + 4.2 TEH + 3.5 to 6.5 4.8 6.9 TEH + 2.5 TEH +34.5 TEH + 4.4 TEH + 3.1 to 8.2 TEH + 3.3 to 4.2 TEH + 2.7 Upper Weld Upper Weld TEH + 3.8 TEH + 2.8 to 9.6 B&W Slv Pl B&W Sleeve B&W, Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve CE Weld Pl=

B&W Sleeve B&W Sleeve B&W Sleeve CE Weld Pl CE Weld Pl B&W Sleeve B&W Sleeve II B&W Sleeve B&W Slv Pl B&W Sleeve B&W Sleeve CE Mech Pl B&W Sleeve Table 4-B Page 57 of 66

0

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& E.

~

S/G B

95MAR GINNA STATION Row Col REPAIRABLE INDICATIONS Indication Location Repair 33 52 36 52 37 52 43 52 7

53 12 53 41 53 42 53 1

54 31 54 38 54 18 55 37 55 5

56 36 56 37 56 1

57 13 58 30 58 2

59 11 59 NQI MAI NQI CRI SAI SAI SRI SAI SRI SRI OBS 94

~o OBS MAI NQI MRI NQI NQI OBS Inc. Fusion CRI SVI NQI NQI TEH + 3.0 to 10.0 TEH + 3.3 to 4.9 TEH + 3.7 TEH + 5.6 TEH + 2.7 TEH + 3.3 TEH + 4.8 TEH + 2.9 TEH + 5.1 to 5.3 TEH + 2.9 TEH + 2.9 TEH + 2.7 TEH + 4.6 to 7.4 TEH + 3.3 to 12.1 TEH + 2.5 TEH + 3.3 to 7.1 TEH + 3.6 to 8.9 Upper Weld TEH + 2.8 TEH +22.6 TEH + 4.7 TEH + 6.8 B&W Sleeve B&W Sleeve B&W Sleeve CE Mech Pl B&W Sleeve B&W Sleeve CE Mech Pl CE Mech Pl B&W Slv Pl B&W Slv Pl CE Weld Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Slv Pl CE Weld Pl B&W Sleeve CE Weld Pl B&W Sleeve Table 4-B Page 58 of 66

r

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& E.

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S/G B

95MAR GINNA STATION REPAIRABLE INDICATIONS Row Col Indication Location Repair 16 60

.30 60 34 60 36 60 14 61 3

62 20 62 21 62 23 63 29 63 5

64 14 65 22 65 38 65 16 66 19 66 26 66 18 67 23 67 29 67 21 68 29 69 CRI SAI CRI NQI NQI SAI Inc. Fusion MAI MAI MRI MAI Inc. Fusion SAI MRI NQI MAI ADI MAI NQI MAI SAI SAI NQI

'RI NQI MRI TEH + 2.3 TEH + 5.0 TEH + 2.9 TEH + 3.4 to TEH + 3.5 to 4 '

4.9 TEH + 2.7 TEH + 4;9 to Upper Weld TEH + 4.4 to TEH + 2.8 TEH + 3.5 TEH + 3.4 to TEH + 3.8 to TEH + 3.2 to TEH + 3.9 to TEH + 4.3 to TEH + 3.5 to TEH + 3.7 to 9.7 5.0 4.2 15.7 4.9 7 '4.6 4.1 4.3 TEH +11.0 to 17.6 TEH + 2.5 TEH + 4.5 TEH + 3.1 TEH + 7.1 Upper Weld TEH + 7.3 to 14.7 TEH + 7.1 to 9.6 B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve CE Weld Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve CE Weld Pl B&W Sleeve B&W Sleeve CE Mech Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve Table 4-B Page 59 of 66

'E e

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S/G B

95MAR GINNA STATION REPAIRABLE INDICATIONS Row Col Indication Location Repair 7

71 13 71 19 72 16 74 Inc. Fusion NQI MAI CRI SAI Upper Weld TEH + 4.9 TEH + 3.7 to TEH + 2.9 TEH + 3.9 to 9.9 5.1 CE Weld Pl B&W Sleeve B&W Sleeve B&W Sleeve 6

75 7

75 1

76 15 76 32 76 10 78 5

79 6

83 8

83 ADI Inc. Fusion SAI SAI SAI MAI SAI SAI SAI TEH + 4.9 to 7.4 Upper Weld TEH + 3.5 to TEH + 4.9 to TEH + 3.4 TEH + 3.4 to TEH + 3.0 to 4.3 6.0 9.4 7.9 TEH + 2.8 TEH + 9.9 to 10.7 B&W Sleeve CE Weld Pl CE Mech Pl B&W Sleeve CE Mech Pl B&W Sleeve B&W Sleeve B&W Sleeve B&W Sleeve Number of Tubes:.

120 Number of Entries:

133 Table 4-B Page 60 of 66

GINNA STATION STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY DATE NEL IU3ES NSPECTID A

8 HOT COLD NOT COLO TO'fAL TIDES REOUIOC CORRECTIVE ACIIOM A

8

)40K REOURID RPA$6 A

8 IKL TIRES SLEEVED A

8 NOJNGGR RETIILh$D tO SERVCE A

8 NO. SLEEVES PLICGED A

8 NO. PillED

$$BES A

8 tOTAL(NET)

A B

TOTAl(hP)

SLEEVID A

B N I'ACTORT APR 1972 MAR 1974 NOV 1974 MAR 1975 JAM 1976 FEB 1976 APR 1976 APR 1977 JR.

1977 JAM 1978 APR 1978 FFB 1979 DEC 1979 APR 1980 NOV 1980 MAT 1981 FEB 1982 SP 1982 APR 1983 MAR 1984 MAR 1985 FEB 1986 FEB 1987 F$B i988 MAR 1988 MAR 1989 MAR 1990 APR 199'I APR 1992 MAR 1993 MAR 19 9l MAR

$ 995 1050 3259 516 1701 430 2174 442 0

0 3192 3192 100 0

2003 268 20l9 325 2049 325 3139 325 313 d 325 3138 325 3137 526 3138 382 3137 633 3137 717 3135 3135 313l 623 3128 0

3122 1517 0

0 3128 1668 29l9 663 2945 1093 2748 757 2520 894 2398 646 2235 772 1098 516 672 39 1931 4l2 53 0

32l7 3247 1025 75 1525 268 300 1714 375

$ 714 375 3182 375 3151 375 314'I 400 3140 526 3129 893 3096 832 3093 963 30df 3087 3083 770 288l 0

2723 1301 208 0

2805 1486 2437 653 2359 1092 1998 706 18'I3 723 1690 627 1558 984 0

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9 177 445 75 211 116 117 2ll 218 122 123 Idl 134 88 120 116l 1693 WASTAGE WASTAGE CRACKNG/WASfACE WASTAGE WASTAGE CRACKIC WASTAGE 6 CRACKIC CRACKNG/WASTAGE 0 CRACKNG CRACKNG/WAS/CA CA/WASTAGE "A"PITTNG~IGA IGA CA/WASTAGE CA/LEDLDAM CA CA/SCC CA/SCC CA/SCC/WASTAGE IGA/SCC/WASTAGE CA/SCC IGA/SCC ISA/SCC IGA/SCC/PWSCC/WAS CA/SCC/PWSCC/WAS CA/SCC/Ivt$SCC/WAS CA/SCC/PWSCC/WAS CA/SCC/PWSCC CA/SCC/PWSCC.

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~ Retvrnevl Io Service vvithoul Sleave A=B 8=Id TABLE 5 M. 4 Oavtscrv I-May-95 Rev. 0

STEAM GENERATOR TUBE INSPECTION AND CORRECTIVE ACTION HISTORY COMMENTS (from TABLE5)

(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 C45 which were clean tubes.

(4)

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

(5)

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

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

41 9

24 1

1 tubes were sleeved with 36" brazed sleeves tubes were sleeved with 28" brazed sleeves tubes were sleeved with 22" tubesheet sleeves tube and 2 sleeves were plugged tube R34 C54 was pulled 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 tubes were sleeved with 20" tubesheet sleeves tubes were sleeved with 36" brazed sleeves tubes were mechanically plugged (CE removable) tube was explosively plugged Page 62 of 66

1 tube was sleeved with a 36" brazed sleeve due to the domino effect.

(7)

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

One tube identified ivith an O.D.

general indication above the secondary side tubesheet was also sleeved with a 27" CE sleeve.

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

27 27 3

tubes were sleeved with 27" CE sleeves tubes were mechanically plugged (CE removable)

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

(8)

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

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

72 80 1

tubes were mechanically plugged (CE removable) tubes were sleeved with 27" CE welded sleeves CE welded sleeve (installed in 1987) was plugged with a CE welded sleeve plug due to rejection of upper weld.

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

BOW 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 the upper welds.

(9)

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

I 7

tubes had tubesheet crevice indications 7

tubes for no confirmed AVBsupport 1

CE sleeve for unverified upper expansion Page 63 of 66

In "B" steam generator, 61 tubes were plugged as follows:

39 2

8 10 1

8 tubes had tubesheet crevice indications tubes were misplugged in the hot leg during 1987 outage tubes to box existing plugs were AVBsupport could not be verified.

tubes for no confirmed AVBsupport tube for flow peaking consideration due to AVB placement Westinghouse. Explosive Plugs were removed and replaced with welded "Top Hat" Plugs (10) The "B" steam generator had 9 tubes plugged for the following reasons:

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

'ata.

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.

B&Wtubesheet sleeve identified by the hydrostatic pressure test was removed from service with a B&Wexplosive plug in the hot leg and a CE mechanical in the cold leg, (11) A total of 177 tubes in "A" steam generator were repaired in 1989 as follows:

137'E 27" welded sleeves (straight and periphery) 40 Tube and/or sleeve plugs 2

Previously plugged tubes stabilized (not counted as repaired)

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

I 367 CE 27" welded sleeves (straight and periphery) 78 Tubes and/or sleeve plugs 1

Previously plugged tube stabilized (not counted as repaired)

(12) A total of 75 tubes in "A"steam generator were repaired in 1990 as follows; 51 CE 27" welded sleeves (straight and periphery) 24 Tube and/or sleeve plugs (includes pulled tubes R25-C63 and R31-C66)

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

191 CE 27" welded sleeves (straight and periphery) including 28 deplugged tubes 20 Tubes and/or sleeve plugs (indudes B&Wtubesheet sleeve noted during hydro)

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

Page 64 of 66

0 0

61 41 14

'CE'27" welded sleeves (straight and periphery)

CE 30" welded sleeves (straight)

Tube and/or sleeve plugs (includes pulled tube R45-C52 and deplugged tubes R17-C52 and R16-C48)

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

80 28 9

CE 27" welded sleeves (straight and periphery)

CE 30" welded sleeves (straight)

Tube and/or sleeve plugs (includes sleeved tube R5-C37, deplugged tube R26-C56 and 2 B&WExplosive plug repairs)

(14) A total of 244 tubes, including 16deplugged

tubes, in "A" steam generator were repaired in 1992 as follows:

36 CE 27" welded sleeves (straight) 194 B&Wexplosively welded tubesheet sleeves 14 Tube and/or sleeve plugs (including two tubes stabilized R12-C11 and R13-C11) total of 218 tubes, including 30 deplugged tubes, in "B" steam generator were repaired as follows:

186 8

CE 27" welded sleeves (straight and periphery)

CE 30" welded sleeves (straight)

Tube and/or sleeve plugs (includes two tubes stabilized R11-C46 and R13-C89, deplugged tube R33-C75 and 3 B&WExplosive plug repairs)

(15) A total of 122 tubes in "A" steam generator were repaired in 1993 as follows:

51 62 6

1 2

CE 27" welded sleeves (straight)

B&Wexplosively welded tubesheet sleeves CE mechanical tube plugs B&Wexplosively welded sleeve plug CE welded tube plugs A total of 171 tubes, including 48 deplugged tubes, in "B" steam generator were repaired as follows:

153 B&Wexplosively welded tubesheet sleeves (includes 46 de-plugged tubes) 1 CE welded sleeve plug 17 CE welded tube plug (includes 2 de-plugged tubes)

(16) A total of 164 tubes in "A"steam generator were repaired in 1994 as follows:

143 B&Wexplosively welded tubesheet sleeves Page 65 of 66

0

15 4

1 1

C-E mechanical tube plugs C-E welded tube plugs C-E welded sleeve plug B&Wexplosive sleeve plug A total of 134 tubes in "B" steam generator were repaired in 1994 as follows:

103

.29 1

1 B&Wexplosively welded tubesheet sleeves C-E mechanical tube plugs C-E welded tube plug C-E welded sleeve plug (17) A total of 88 tubes in "A"steam generatro were repaired 75 B&Wexplosively welded tubesheet sleeves 3

B&Wexplosive sleeve plugs 10 C-E mechanical tube plugs A total of 120 tubes in "B" steam generator were repaired 91 B&Wexplosively welded tubesheet sleeves 8 B&Wexplosive sleeve plugs 11 C-E mechanical tube plugs 10 C-E welded sleeve plugs

~Page 66 of 66

S/G FINAL REPORT DISTRIBUTION Bernie Carrick Mike Davison Jim Dunne Gerry Geiken Gary Grant Paul Gorski John Hotchkiss Andy Harhay Ray Henry Ron Jaquin Paul Lewis Rocky Marchionda Tom Marlow Bob Mecredy Tom Moslak or NRC Resident Mike Saporito John F. Smith Mike Smith Bob Smith'ack St. Martin Gene Voci Joe Widay George Wrobel (2 copies)

h 1

I

ML17264A105

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