ML20046A684
| ML20046A684 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 07/23/1993 |
| From: | Fenech R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 93-10, NUDOCS 9307290215 | |
| Download: ML20046A684 (3) | |
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Tennessee Vahey Autherny. Pcst 0%ce Box 2000. Soddy-Daisy. Tennessee 37379-2000 Robert A. Fenech Vce Presiaent, Sequoyan tbxtear Piant July 23, 1993 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:
In the Matter of
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Docket No. 50-327 Tennessee Valley Authority
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SEQUOYAH NUCLEAR PLANT (SQN) - UNIT 1 - FACILITY OPERATING LICENSE DPR TECHNICAL SPECIFICATION (TS) 3.7.12 SPECIAL REPORT 93-10 The enclosed special report provides details concerning two fire barriers that were nonfunctional for a period of time greater than the TS allowable timeframe. This report is being submitted in accordance with TS 3.7.12 Action Statement (a).
l If you have any questions concerning this submittal, please telephone C. H. Whittemore at (615) 843-7210.
Sincerely, hd A
Robert A. Fenec'.
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Page 2 July 23, 1993 l
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Mr..D. E.:LaBarge, Project Manager 1
U.S. Nuclear Regulatory Commission
.One White Flint, North 11555 Rockville Pike l
Rockville, Maryland 20852-2739 j
NRC Resident Inspector'
.Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region II
-i 101 Marietta Street, NW, Suite 2900
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ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 1 SPECIAL TEPORT 93-10 t
In support of the Unit 1 Cycle 6 refueling outage activities, the following two fire barriers were intentionally breached.
1.
Penetration Mark No. 20 2.
Penetration Mark No. 1287 i
These conditions are being reported in accordance with Technical Specification Action Statement 3.7.12.a.
PENETRATION MARK No. 20 Description of Condition On June 19, 1993, a apare mechanical penetration (mark No. 20) was breached.
The penetration is located in the auxiliary building and penetrates the shield building wall. The penetration was breached to route electrical sensor cables and pressure sensor lines into-the Unit 1 annulus area in support of the containment integrated leak-rate test (CILRT) to be performed.
The CILRT activity is not expected to be completed until late September, near the end of the Unit 1 outage.
Corrective Action In accordance with LCO 3.7.12 Action Statement (a), the fire detectors on-one side of the breach were verified operable; a roving fire watch was established. The fire watch will be maintained until the breach is removed and the fire barrier is reestablished.
PENETRATION MARK NO. 1287 Description of Condition On June 19, 1993, a mechanical penetration (mark No. 1287) was breached.
The penetration is located in the auxiliary building and penetrates the wall between the containment purge air supply fans and equipment room and the auxiliary building gas treatment system (ABGTS) room.
The penetration was breached to route inatrument cables into the ABGTS room in support of the CILRT to be performed. The CILRT activity is not expected to be completed until late September, near the end of the Unit 1 outage.
Corrective Action In accordance with LCO 3.7.12 Action Statement (a), the fire detectors on one side of the breach were verified operable; a roving fire watch was established. The fire watch will be maintained until the breach is-removed and the fire barrier is reestablished.