ML20206M934

Forwards Rept of SG Tube Plugging During Unit 2 Cycle 9 Refueling Outage,As Required by TS 4.4.5.5.a.ISI of Unit 2 SG Tubes Was Completed on 990503

ML20206M934
Person / Time
Site:	Sequoyah
Issue date:	05/10/1999
From:	Salas P TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9905170084
Download: ML20206M934 (4)

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Iennessee variey Aumonty Post OHice Boxc7 ddy Daisy Tennessee 37379 l

l May 10, 1999 U.S. Nuclear Regulatory Commission i ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen: l In the Matter ) Docket No. 50-328 Tennessee Valley Authority )

SEQUOYAH NUCIJZAR PLANT (SQN) - UNIT 2 STEAM GENERATOR (SG)

TUBE PLUGGING REPORT AND NOTIFICATION OF UNIT 2 SG TUBE INSPECTIONS - UNIT 2 CYCLE 9 REFUELING OUTAGE

! As required by SON Technical Specification (TS) 4.4.5.5.a, this submittal provides a report of SG tube plugging during l

the Unit 2 Cycle 9 refueling outage. The report is included l in the enclosure. The in-service inspection (ISI) of the Unit 2 SG tubes was completed on May 3, 1999.

Pursuant to the reporting requirements of TS 4.4.5.5.c, NRC was notified of the SG tube inspections that fell into Category C-3. Notification of these results was made during l a telephone conference call on May 3, 1999. In accordance l with SON TS 3/4.4.5, SG No. 2 U-Bend inspections were l classified as Category C-3. The initial Row 1 and 2 U-Bend }

Plus-Point examination samples were 157 tubes. There were j three tubes in SG 2 that were determined to be degraded. I These tubes are located in Row 1. These tubes were removed from service by plugging. Since 100 percent of the Row 1 and 2 tubes were examined, no expansion was necessary.

4G TS 4.4.5.5.c also requires a written follow-up report. TVA 2 plans to provide this information in conjunction with SON's 90-day alternate plugging report.

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'7 9905170084 990510 PDR ADOCK 05000328 G PDR

U.S. Nuclear. Regulatory Commission Page 2' May 10,.1999 4

.Please direct questions concerning this issue to me at (423) 843-7170.or J. D. Smith at (423) 843-6672.

I Sincerely,

, A

((((5

" Pedro Salas Site Licensing and Industry Affairs. Manager Enclosure cc (Enclosure):

Mr. R. W. Hernan', Project Manager Nuclear Regulatory Commission

- One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 NRC Resident Inspector Sequoyah Nuclear Plant

, 2600 Igou Ferry Road Soddy-Daisy, Tennessee. 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region II-Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, Georgia 30303-3415 i

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l ENCLOSURE STEAM GENERATOR 15-DAY PLUGGING REPORT SEQUOYAH UNIT 2 CYCLE 9 l

SG ROW COL INDICATION 1 1 59 SAI 1 1 76 SAI i 1 4 83 PVN 1 17 37 PVN 1 33 59 40 1 34 53 40 1 36 33 SAI i l 1 44 34 52 l l

l Total Number of Tubes i l

l Plugged Thic Generator: 8 l

l SG ROW COL INDICATION 2 1 35 SAI l 2 1 37 SAI 2 1 60 SAI 2 2 20 SAI 2 4 55 SAI 2 8 55 SAI 2 8 77 SCI

, 2 12 35 SVI l 2 12 71 SAI l 2 22 76 UAI I 2 31 14 47 l 2 32 16 SVI 2 37 21 50 2 40 34 PVN 2 42 31 47 l 2 44 33 41 l 1

Total Number of Tubes l Plugged This Generator: 16 i

1 s

STEAM GENERATOR 15 DAY PLUGGING REPORT SEQUOYAH UNIT 2 CYCLE 9 l

SG ROW COL INDICATION 3 12 40 SCI 3 13 31 SCI 3 13 41 SCI 3 13 61 PVN 3 19 25 SCI 3 22 36 SAI 3 23 23 SAI l

3 31 33 SAI ,

l 3 34 21 SAI 3 38 73 40

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Total Number of Tubes Plugged This Generator: 10 l SG ROW COL INDICATION 4 12 64 SAI I 4 31 15 59 4 44 61 41 Total Number of Tubes 1

Plugged This Generator: 3 J

Total Number of Tubes Plugged This Unit: 37 SAI = Single Axial Indication SCI = Single Circumferential Indication SVI = Single Volumetric Indication PVN = Permeability Variation

1. indicated the percent through wall l

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