ML18152B549

Forwards Results of SG Tube Insp Performed During 1998,per TS 4.19.F.b.Ltr Does Not Establish Any New Commitments

ML18152B549
Person / Time
Site:	Surry
Issue date:	02/12/1999
From:	Mccarthy J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
99-087, 99-87, NUDOCS 9902240436
Download: ML18152B549 (14)

Text

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• e VIRGINIA. ELECTRIC A]S"D POWER COMPANY RICHMOND, VIRGINIA 23261 February 12, 1999 United States Nuclear Regulatory Commission Serial No.: 99-087 Attention: Document Control Desk NLOS/MM Washington, DC 20555-0001 Docket Nos.: 50-280 50-281 License Nos.: DPR-32 DPR-37 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 ANNUAL STEAM GENERATOR INSERVICE INSPECTION

SUMMARY

REPORT Pursuant to Technical Specification 4.19.F.b for Surry Power Station Units 1 and 2, Virginia Electric and Power Company is submitting the results of the steam generator tube inservice inspections performed during 1998. The steam generator tube inspections conducted on Unit 1 during the Fall 1998 refueling outage are included in Attachment 1. There are no Unit 2 inspection results for 1998, since there was no corresponding refueling outage for Unit 2 in 1998 and no steam generator tube inspections were conducted.

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

Very truly yours, port Attachment cc: U. S. Nuclear Regulatory Commission Region II Atlanta Federal Center 61 Forsyth Street, SW, Suite 23 T85 Atlanta, GA 30303-3415 n () 110 ,, t; Mr. R. A. Musser ,..- .~ \ ' 1 ~:.. v NRC Senior Resident Inspector Surry Power Station

( 9902240436 990212 - ~ - ~ :

PDR ADOCK 05000280

• I G PDR

• Attachment 1 Abstract of Examinations Eddy Current Examinations Nonferromagnetic Steam Generator Tubing Surry Unit 1 Steam Generator "B" In Steam Generator "B," 3334 tubes were inspected full length with bobbin probes to test for general degradation. The plan also consisted of the following:

1. Hot leg top of tubesheet testing of 680 tubes with rotating pancake coil (RPC) to detect cracking;

2. Row 1 U-bend RPC testing of 19 tubes to detect cracking;

3. Plus point inspection of 4 tubes for characterization of anomalous signals; and

4. Ultrasonic (UT) inspection of 5 tubes for characterization of anomalous signals.*

Steam generator "B" had eight (8) plugged tubes at the beginning of the inspection, and six (6) tubes were plugged as a result of this inspection. Three tubes (Row 1-Column 58, Row 1-Column 59, and Row 1-Column 60) were preventively plugged due to restrictions which prevented complete inspection. The following tubes (Row 32-Column 14, Row 32-Column 16, and Row 33-Column 16) were preventively plugged due to indications at the hot leg side baffle plate. The indications were sized based upon bobbin results after they were characterized with a RPC probe as volumetric. In addition, one of these tubes (Row 33-Column 16) was further characterized with a rotating UT probe. The results of sizing of these indications, based on a qualified bobbin wear standard, shows all of these indications to be between 21 %-26% through wall.

No indications were reported that are significant to tube integrity. However, the following indications were reported during the inspection:

Row Column Indication Location Remarks 8 4 MBM 5C 12 5 MBM 1H 13 6 MBM 1H 15 6 MBM 4C 14 7 MBM* 1C 20 7 MBM BPH 23 7 MBM 1H 8 8 MBM TSC

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Row Column

-- Indication Location

• Remarks Page 2 8 9 MBM 5H 16 10 MBM 1C 11 11 MBM 3H 14 11 MBM 1H 22 11 MBM BPC 2 13 MBM 5H 4 14 MBM 1H 4 14 ONT 7H 21 14 MBM 6H 14 15 MBM 1C 21 15 MBM 5C 27 15 MBM TSC 8 16 MBM 5H 12 16 MBM 5C 33 16 MBM 2C 33 16 26%TW BPH Preventively plugged 33 16 ONT 2H 33 16 ONT 2H 13 17 MBM 3H 13 17 MBM 5H 21 19 MBM BPC 33 19 MBM 2H

Row Column Indication Location

• Remarks Page 3 35 19 MBM 6 5 20 MBM 3 24 20 MBM 3H 27 20 MBM BPH 31 20 MBM BPH 35 20 MBM 1H 17 22 MBM TSC 24 22 MBM 2H 35 22 MBM 2C 35 22 MBM BPC 17 22 MBM 3C 17 23 MBM 3C 17 23 MBM 2C 24 23 MBM BP 24 23 MBM 4H 24 23 MBM 5H 30 23 MBM 2C 26 24 MBM 3H 33 24 MBM 6H 33 24 MBM 6H 39 24 MBM AV2 39 24 MBM AV2

Row e

Column Indication Location

• Remarks Page4 21 25 MBM 5H 29 25 MBM 2C 9 26 MBM 4H 21 26 MBM BPC 3 27 MBM TSH 38 27 MBM 1H 1 28 MBM TSC 19 28 MBM 1C 22 29 MBM 5H 30 29 MBM 6H 13 30 MBM 5H 42 30 MBM 1C 39 31 MBM 6C 8 32 MBM 3H 39 32 MBM AV1 3 33 MBM 5H 11 33 MBM TSH 11 33 MBM 1H 25 33 MBM 3H 39 34 MBM 6H 42 34 MBM 2C 9 35 MBM 3C

Row e

Column Indication

• Location

• Remarks Page 5 20 35 MBM 3H 23 35 MBM BPH 31 35 MBM 2H 31 35 MBM 2H 22 37 MBM 5H 39 37 MBM 2H 43 37 MBM 7H 24 38 MBM 6C 27 38 MBM 2H 27 38 MBM 4C 31 38 MBM 4H 42 38 MBM 5C 34 39 MBM 3H 37 40 MBM 2H 43 40 MBM 3H 29 41 MBM 5C 28 42 MBM 6C 29 42 MBM 1H 7 43 MBM 3C 16 43 MBM AV3 32 43 MBM 3H 44 43 MBM BPH

e e Page 6 Row Column Indication Location Remarks 42 44 MBM 6H 44 44 - MBM 3H 24 46 MBM 1H 25 46 MBM AV3 34 46 MBM BPC 4 47 MBM 5H 12 47 MBM TSC 42 47 MBM 3C 44 47 MBM 1C 6 48 MBM 5C 6 48 MBM 4C 34 48 MBM 5H 28 49 MBM 5C 3 50 MBM 5C 5 50 MBM 4H 31 51 MBM 3C 19 52 MBM 5C 40 52 MBM AV4 6 53 MBM 1H 12 53 MBM 3C 12 53 MBM TSC 21 54 MBM TSH

e e Page 7 Row Column Indication Location Remarks 21 54 MBM 1H 21 54 MBM 4C 44 55 MBM 4C 35 56 MBM 5C 34 57 MBM 1C 37 57 MBM 2H 39 57 MBM AV4 45 57 MBM 1H 45 57 MBM AV2 22 58 MBM 5C 13 59 MBM 1C 26 59 MBM 5C 33 59 MBM 5H 33 59 MBM 5H 18 60 MBM 6C 5 63 MBM 2H 19 67 MBM 6C 26 68 MBM BPH 17 69 MBM BPH 19 70 MBM 6H 25 70 MBM TSH 28 70 MBM AV1

e e Page 8 Row

- Column Indication Location Remarks 39 70 MBM 5C 6 71 MBM 1C 31 72 MBM 1H 26 73 MBM 6H 19 74 MBM 4C 19 75 MBM 5C 34 76 MBM 6H 34 76 MBM 6C 34 76 MBM 6C 13 77 MBM 3H 23 77 MBM 6C 22 78 MBM 3H 30 78 MBM 1C 29 80 MBM 3H 29 80 MBM 3H 29 80 MBM 1C 29 80 MBM 1C 29 80 MBM 1C 7 81 MBM 1H 7 81 MBM 3H 29 82 MBM 3C 31 82 MBM 2H

Row e

Column Indication Location

• Remarks Page 9 3 83 MBM 1C 21 84 MBM 6H 19 85 MBM BPC 13 86 MBM 1C 4 88 MBM BPC 21 88 MBM BPH 26 75 MBM TSH 26 75 ONT 2H 14 90 MBM 1C 1 58 RST TSH Preventively plugged 1 59 RST TSH Preventively plugged 1 60 RST TSH Preventively plugged 32 14 22%TW BPH Preventively plugged 32 16 21%TW BPH Preventively plugged 9 2 ONT 6H 16 4 ONT AV4 18 5 ONT QV4 18 5 ONT 6C 18 5 ONT 6C 1 6 ONT 7C 19 7 ONT 6C 4 12 ONT 7H

Row e

Column Indication Location

• Remarks Page 10 9 14 ONT 5C 31 14 ONT 6C 8 15 ONT 7H 2 17 ONT 7H 7 21 ONT 6C 11 22 ONT 7H 4 29 ONT 6H 15 32 ONT 6C 45 41 ONT QV4 42 43 ONT BPH 11 49 ONT 6C 10 49 ONT 7H 11 50 ONT 7H 19 51 ONT 4H 19 51 ONT 6H 19 51 ONT 1C 43 54 ONT 2C 1 58 ONT TSC 17 58 ONT 2H 1 59 ONT TSC 10 60 ONT TSH 10 60 ONT 1C

Row Column Indication Location e

Remarks Page 11 6 63 ONT 3H 6 67 ONT 4C 4 68 ONT 1C 34 69 ONT 3H 36 70 ONT AV2 21 76 ONT 1C 1 78 ONT 7H 27 80 ONT 6H 4 83 ONT 7H 20 83 ONT 2H 1 87 ONT 7H 20 87 ONT 2H 18 89 ONT 7C 19 89 ONT 7C 20 89 ONT 7C 20 89 ONT 7C 4 90 ONT 6H 16 90 ONT 7C 17 90 ONT 1H 17 90 ONT 7C 18 90 ONT 7C 18 90 ONT 7C

• J Row Column Indication Location

• Remarks Page 12 15 91 ONT 7C 16 91 ONT 7C 16 91 ONT 7C 4 92 ONT 7H Glossary of Terms ONT: Dent - A tube deformation resulting in a non-circular tube shape with areas of reduced diameter.

MBM: Manufacturing Buff Mark - A shallow tube wall loss due to manual buffing of minor surface imperfections during steam generator construction.

RST: Restricted tube.

%TW: Percent through wall reduction of tube.

Row-Column: Tube identifier numbers based on an X-Y coordinate system.

Location: The location (in the tube) of the indication. *

• Examples of locations are as follows:

AV (1 through 4): Anti-vibration bars located on the top radius of the tubes.

H (1 through 7): Tube support plates on the hot leg of the steam generator.

C (1 through 7): Tube support plates on the cold leg of the steam generator.

TSH: Top of tube sheet on the hot leg of the steam generator.

TSC: Top of tube sheet on the cold leg of the steam generator.

THE: Tube end on the hot leg of the steam generator.

TEC: Tube end on the cold leg of the steam generator.

. ' \

• d*

' w BPH:

• Page 13 Baffle plate on the hot leg of the steam generator.

BPC: Baffle plate on the cold leg of the steam generator.

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