ML20154L108
| ML20154L108 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 05/19/1988 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8805310160 | |
| Download: ML20154L108 (3) | |
Text
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4 TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 SN 1578 Lookout Place MAY 191988 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Hashington, D.C.
20555 Gentlemen:
In the Matter of f
)
Docket No. 50-328 Tennessee Valley Authority
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SEQUOYAH NUCLEAR PLANT (SQN) UNIT 2 - STEAM GENERATOR (S/G) TUBE PLUGGING f
On April 5, 1988, SQN identified a primary-to-secondary leak on unit 2.
Enclosed is the status of the tubes plugged in each unit 2 S/G. Also noted are the tubes that were previously plugged.
The unit 2 row 1 tubes have been plugged as a preventative measure but may be returned to service after heat treatment and eddy current testing of the S/G tubes in a future outage.
If you have any questions concerning this matter, please call H. R. Harding at
<+
(615) 870-6422.
Very truly yours, TENNESSEE VALLEY AUTH0 PITY p.
R.
- idley, Nuclear Licensing and Regulatory Affairs Enclosure cc:
See page 2 i
8805310160 080519 ADOCK 050 8
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An Equal opportunity Employer f
U.S. Nuclear Regulatory Commission if/lY 19 1988 cc (Enclosures):
Mr. K. P. Barr, Acting Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NH, Suite 2900 Atlanta, Georgia 30323 Mr. G. G. Zech, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Sequoyah Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379
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ENCLOSURE J
SQN Unit 2 S/G Plugged Tubes The following provides a summary of the status of unit 2 S/G tubes that were plugged as corrective and preventative actions taken to ensure S/G integrity.
S/G No. 1
(*)
Row Column Indication % / Test Method Location Reason for Plugging 1
1-94 N/A / N/A N/A Prevent, measure S/G No. 2
(*)
Row Column Indication % / Test Method Location Reason for Plugging 1
1-94 N/A / N/A N/A Prevent. measure S/G No. 3
(*)
i Row Column Indication % / Test Method Location Reason for Plugging 1
3 60/ECT*
U-Bend Req. by TS 1
39 97/ECT U-Bend Req. by TS 100/ Helium leak test 1
48 100/ Helium leak test U-Bend Leaker 1
49 100/ Helium leak test U-Bend Leaker 1
1-94 N/A / N/A N/,A Prevent, measure S/G No. 4 Row Column Indication % / Test Method Location Reason for Plugging 1
1-94 N/A / N/A N/A Prevent. measure (a) The following tubes were previously plugged in S/G No. 1:
RIC7, RIC12, RIC26, RIC29, RIC36, RIC59. RIC61, RIC62, RIC63, RIC66, RIC67 RIC68, RIC69, RIC88, RIC89, and RIC91.
(b) The following tubes were previously plugged in S/G No. 2:
RIC87, RIC88, RIC90, RIC49, and RIC50.
(c)
The following tubes were previously plugged in S/G No. 3:
1 RICl, RIC13, and RIC29.
(*)
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