ML20206M934
| 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) | |
Text
.
1 Iennessee variey Aumonty Post OHice Box 7 c ddy Daisy Tennessee 37379 May 10, 1999 U.S.
Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C.
20555 Gentlemen:
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 2
TS 4.4.5.5.c also requires a written follow-up report.
TVA plans to provide this information in conjunction with SON's
))0 90-day alternate plugging report.
'7 9905170084 990510 PDR ADOCK 05000328 G
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
i k~
l ENCLOSURE STEAM GENERATOR 15-DAY PLUGGING REPORT SEQUOYAH UNIT 2 CYCLE 9 l
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 Total Number of Tubes i
l Plugged Thic Generator:
8 l
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 1
Total Number of Tubes Plugged This Generator:
16 i
1 s
STEAM GENERATOR 15 DAY PLUGGING REPORT SEQUOYAH UNIT 2 CYCLE 9 l
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 Total Number of Tubes Plugged This Generator:
10 l
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
- indicated the percent through wall