ML20244B843
| ML20244B843 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/08/1989 |
| From: | Michael Ray TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8906140001 | |
| Download: ML20244B843 (3) | |
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7, e TENNESSEE VALLEY AUTHORITY CHATTANOOGA, TENNESSEE 37401 SN 157B Lookout Place
'JUN 081989 4
U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Hashington, D.C.
20555 Gentlemen:
In the Matter of
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Docket Nos. 50-327 Tennessee Valley Authority
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50-328 SEQUOYAH NUCLEAR PLANT (SQN) UNITS 1 AND 2 - NRC INSPECTION REP,,d NOS. 50-327/88-12 AND 50-328/88 RESPONSE TO UNRESOLVED ITEM (URI) 88-12-01
References:
1.
NRC letter to TVA dated June 24, 1988, " Inspection Report Nos. 50-327/88-12 and 328/88-12" 2.
TVA letter to NRC dated March 2, 1988, "Sequoyah Nuclear Plant (SQN) - Resolution of Open Inspection Issues" This letter provides TVA's response to URI-88-12-01 that was transmitted to TVA in Reference 1.
The enclosure provides TVA's response to this URI and further delineates TVA action plans to resolve this issue previously responded to in Reference 2.
No new commitments are contained in this submittal.
Please direct questions concerning this issue to B. S. Schofleid at (615) 843-6172.
Very truly yours, TENNESSEE VALLEY AUTHORITY
\\lY O
Manager, Nuclear Lucensing and Regulatory Affairs Enclosure cc: See page 2
$gol 8906140001 890608 PDR ADOCK 05000327 t
Q PDC An Egual Opportunity Employer
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_U.S. Nuclear Regulatory Commission M 08 E89 cc (Enclosure):
Ms. S. C.: Black, Assistant Director for Projects i
TVA Projects Division j
.U.S. Nuclear Regulatory Commission One White Flint, North' i
11555 Rockville Pike.
i Rockville, Maryland 20852 a
Mr. B. A. Wilson, Assistant Director for-Inspection Programs
' i TVA Projects Division-U.S.' Nuclear Regulatory Cod. mission Region II 101 Marietta Street, NW, Suite 2900 l
Atlanta, Georgia 30323 1
Sequoyah Resident Inspector 3
Sequoyah Nuclear Plant j
2600 Igou Ferry Road Soddy Daisy, Tennessee' 37379
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ENCLOSURE 1 UNRESOLVED ITEM (URI) 88-12-01 TITLE:
THERMAL MONITORING OF SUPPORTS ITEM DESCRIPTION:
"TVA's use of strain gage measurements to qualify supports 2-H63-2, 2-H63-3, 2-H63-4 and 2H63-5 to the long-term pipe support design criteria SQN-DC-V-24.2 is not acceptable unless TVA performs an evaluation of the entire piping analysis problem to obtain the correct distribution of loads for the qualification of all supports in the analysis.
TVA should provide a response which specifies the method used to qualify these four supports to long term criteria."
RESPONSE
TVA has initiated reanalysis of the affected piping problems for both units and will modify the supports as necessary to meet long-term qualification Design Criteria SQN-DC-V-24.2.
The reanalysis and modification work will be complete before the end of the Cycle 4 outage for each unit.
The above actions are tracked presently under Corporate Commitment Tracking System (CCTS) Item NCO-88-0048-001 for Unit 1 and NC0-88-0048-004 for Unit 2 with completion dates of Units 1 and 2 Cycle 4 outages, respectively.
The commitment was made in TVA's March 2, 1988, letter to NRC to qualify the support affected by this URI in accordance with long-term support Design Criteria SQN-DC-V-24.2 or to modify the support.
The completion of these actions will complete work required for the CCTS item and this URI.
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