ML18153A489

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Forwards Summary Rept for SG Tube Inservice Insp Performed During 1996 Refueling Outage
ML18153A489
Person / Time
Site: Surry  
Issue date: 02/10/1997
From: Sarver S
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
97-085, 97-85, NUDOCS 9702180383
Download: ML18153A489 (14)
v • d • e


Text

,_,

e VIRGINIA ELECTRIC ~D POWER COMPANY RICHMOND, VIRGINIA 23261 February 10, 1997 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 Serial No.97-085 NL&OS/GDM RO Docket No.

50-280 50-281 License No.

DPR-32 DPR-37 ANNUAL STEAM GENERATOR INSERVICE INSPECTION

SUMMARY

REPORT Pursuant to Technical Specification 4.19.F.b, Virginia Electric and Power Company is submitting the 1996 Steam Generator lnservice Inspection Summary Report for Surry Power Station Units 1 and 2.

During the May 1996 refueling outage for Surry Unit 2, the tubes in the "C" steam generator were examined. The information in Attachment 1 is a summary of the results of those examinations.

These results include the number and extent of the tubes examined, location and characterization of each indication of an imperfection, and identification of tubes that were plugged. is a tubesheet map that indicates the locations of the plugged tubes, and Attachment 3 provides a glossary of terms used in the report. Since Unit 1 did not have a refueling outage in 1996, no steam generator tube inservice inspections were performed on that Unit.

This letter does not establish any new commitments. Should you have any questions or require additional information, please contact us.

Very truly yours, S. P. Sarver, Acting Manager Nuclear Licensing and Operations Support Attachments 1

cc:

U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W. Suite 2900 Atlanta, Georgia 30323 Mr. R. A. Musser NRG Senior Resident Inspector Surry Power Station

Summary Report for the Steam Generator Tube lnservice Inspections Performed During the 1996 Unit 2 Refueling Outage

May 1996 Unit 2 Refueling Outage SIG "C" Eddy Current Examination Summary In Steam Generator "C", all available tubes were inspected full length with bobbin probes.

A 670 tube sample was tested with Rotating Pancake Coil (RPC) probes in the hot leg transition (TSH +/- 3") region. Supplemental examinations were also performed using RPC probes where additional confirmatory or other data was desired. The following eight tubes were plugged:

Row 43 38 38 31 34 35 1

1 Column 31 29 31 27 73 68 59 36 This steam generator contains a total of nine plugged tubes. See the attached list for details.

Surry Unit 2, Steam Generator "C" May 1996 Refueling Outage Row Column Indication Location Remarks 1

1 16 TSC 1

1 14 TSC 12 6

18 6H 12 7

14 6H 4

10 16 7H 16 13 10 7H 25 13 26 TSC 25 13 PIT TSC 20 14 17 6C 25 14 12 6H 27 14 19 7C 30 14 14 BPC 4

16 17 7C 7

16 15 2H 33 19 12 6H 23 23 15 2H 31 27 SAA TSH plugged*

38 28 14 AV3 1

29 18 2C 38 29 13 AV2 plugged**

38 29 37 AV3 plugged 38 29 32 AV4 plugged 38 29 PIO AV3 plugged

e Surry Unit 2, Steam Generator "C" May 1996 Refueling Outage Row Column Indication Location Remarks 17 30 10 4H 37 30 20 AV2 37 30 21 AV3 37 30 PIO AV3 10 31 16 TSC 38 31 17 AV1 plugged**

38 31 18 AV2 plugged 38 31 29 AV3 plugged 38 31 PIO AV3 plugged 43 31 24 AV1 plugged 43 31 25 AV2 plugged 43 31 29 AV3 plugged 43 31 42 AV4 plugged 43 31 PIO AV4 plugged 10 32 18 TSC 23 32 18 BPC 40 32 16 6C 23 33 19 4H 23 33 10 4C 40 33 16 AV2 40 33 17 AV3 20 34 13 6C 24 34 18 4H 38 34 12 AV1 38 34 21 AV2 38 34 24 AV3

_ __J

e Surry Unit 2, Steam Generator "C" May 1996 Refueling Outage Row Column Indication Location Remarks 38 34 18 AV4 38 34 PIO AV3 1

36 RST TEH plugged***

12 40 19 6H 37 40 12 AV3 43 40 22 AV2 43 40 PIO AV2 27 41 17 6C 42 41 15 2C 39 42 27 6C 23 43 16 TSC 42 45 15 1H 9

49 12 TSC 28 49 19 AV4 5

51 19 TSC 16 54 18 SC 35 54 14 AV2 40 54 23 AV3 40 54 11 AV4 40 54 PIO AV3 34 55 15 6H 39 55 14 AV3 39 55 10 AV4

4

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Surry Unit 2, Steam Generator "C" May 1996 Refueling Outage Row Column Indication Location Remarks 40 57 16 AV1 5

58 16 4C 32 58 18 TSC 32 58 13 TSC 1

59 RST TEC plugged***

26 60 18 6H 21 61 13 4C 44 61 12 4C 5

62 16 2C 12 63 10 2C 40 63 14 AV3 40 63 13 AV4 22 64 15 4C 1

65 18 TSC 10 66 16 1C 12 66 18 6H 35 68 MAA TSH plugged*

35 68 ORI TSH 19 71 14 6C 37 71 13 2C 34 73 SM TSH plugged*

I Row 28 31 31 24 8

8 8

8 8

21 3

12 12 13 2

2 Surry Unit 2, Steam Generator "C" May 1996 Refueling Outage Column Indication Location Remarks 75 19 TSC 75 11 AV3 75 11 AV4 79 10 4C 83 10 BPC 83 12 TSC 83 10 TSC 83 15 TSC 83 14 TSC 84 14 6C 88 13 BPC 92 15 TSC 92 16 TSC 92 13 TSC 94 16 2C 94 10 2C

- Anomalous indication, preventively plugged

- Anti-Vibration Bar wear, preventively plugged

- Restricted

ATTACHMENT 2 SURRY UNIT 2, STEAM GENERATOR "C" 1996 REFUELING OUTAGE TUBESHEET MAP

X: 8 TUBES PLUGGED SG -

C TUBES PLUGGED a: 1 TUBE PLUGGED PREVlOUSL Y Surry Unit 2 05-22-1996

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Glossary of Terms e

Glossary of Terms

1.

ROW, COL - COLUMN - Tube identifier numbers - an X-Y coordinate system.

2.

IND - INDICATION - Character codes and numerics that represent the analysis results of the data for that tube, e.g., SAA, 25%, etc.

3.

LOCN - LOCATION - The location in the tube of the INDICATION called.

4.

PIO - POSITIVE 1.0. utilized to verify the tube/ID of an indication from a tube containing an indication that was tested previously during the same inspection.

5.

MAA - MULTIPLE AXIAL ANOMALY - Describes multiple axially oriented anomalies that are called from Rotating Pancake Coil probe data to allow future monitoring.

6.

ORI - DISTORTED ROLL TRANSITION INDICATION - A possible tube wall loss condition that is unquantifiable with a numeric percent call due to the signal characteristics and is located at the roll transition - often retested with RPC probe.

7.

PIT - A small volumetric RPC indication that has been detected at Surry above the top of the tubesheet on the cold leg that is not cracklike and has essentially the same axial and circumferential extent.

8.

RST - RESTRICTED -

Indicates that the probe listed in the record would not physically pass the location specified.

9.

55 - A number in the indication column that shows the % through wall depth of the indication.

10.

TSH - Top of Tubesheet Hot Leg.

11.

TSC - Top of Tubesheet Cold Leg.

12.
  1. C, #H - (#=number) of Support Plate Hot or Cold Leg, e.g., 3H, 6H, 7C.
13.

AV1, AV2, AV3, AV4 - Anti-Vibration Bars 1 through 4.

14.

BPH, BPC - BAFFLE PLATE HOT AND COLD

15.

TEH - Tube End Hot Leg

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16.

TEC - Tube End Cold Leg Glossary of Terms

17.

SAA - SINGLE AXIAL ANOMALY - Describes a single axially oriented anomaly.

that is called from Rotating Pancake Coil probe data to allow future monitoring.

Note: Where no comment appears in the remarks column the tube is still in service.

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