ML20153G648
| ML20153G648 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 09/02/1988 |
| From: | Shawn Smith TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 88-13, NUDOCS 8809080298 | |
| Download: ML20153G648 (2) | |
Text
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TENNESSEE VALLEY AUTHORITY Sequoyah Nuclear Plant Post Office Box 2000 Soddy-Daisy. Tennessee 37379 September 2, 1988 U. S. Nuclear Regulatory Comission Document Control Desk Washington, DC 20555 e
Centlemen:
TENNESSEE VALLEY AUTHORITY - SEQUOYAH NUC:. EAR PLANT UNITS 1 & 2 - DOCKh"r NOS. 50-327 AND -328 - FACILITY OPERATING LICENSE DPR-77 AND DPR SPECIAL REPORT 88-13 The enclosed special report provides details concerning a fire barrier being nonfunctional for greater thun seven days. This event is being reported in accordance with action statement (a) of Limiting Conditions for Operation 3.7.12.
Very truly yours.
TENNESSEE VALLEY AUTHORITY S
Plant Manar.or Enclocuro cc (Enclosure):
J. Neluon Crace. Regional Administrator U. S. Iluelear Rc5u12 tory Commission Eulte ?900 101 Marietta Street. NW
..t lan t ti. Georgia 30323 Records Centor Instltute of Nuclear Power Operations Suite 1500 1100 circle 75 Parkway Atlanta. Georgia 30339 NRC Inspector. Sequoyah Nuclear Plant
/ @f 8809000298 880902 PDR ADOCK 05000327 S
PNU An Equal Opportunity Employer
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4 SEQUOYAH NUCLEAR PLANT UNIT 1 SPECIAL REPORT 88-13 DESCRIPTION OF EVENT on August 9,1988, with unit 1 in mode 5 (cold shutdown) fire breach permit number 7044, which was issued on August 1, 1988 for fire door A-68 (1B-B residual heat removal (RHR) and containment spray (CS) heat exchanger room on elevation 690 of the Aux 111ery Lullding), exceeded the seven-day limit allowed by Technical Specification (TS) limiting condition for operation (LCO) 3.7.12.
The fire breach (permit No.7044) wcs issued at 1900 EDT on August 11988 and was not closed untti 0200 EDT on August 9,1988.
The fire breach was issued initially to authorize opening of the door for ventilation during surveillance testing activities in the room. Ventilation was required because of undesirable fumes from painting in the room. While the door was breached, work activities were also initiated for wet layup of the IB Containment spray heat exchanger which required a temporary water hose to be routed through the open door. The survelliance testing work activities under SI-260.2.1, "BIT Cold Les Injection Flow Balance Pump Performance and Check Valve Test" were completed at approximately 2131 EDT on August 1,1988, but the hsst exchanger wet layup work continued past the seven day interval.
CAUSE OF EVENT The duration required to completo this work exceeded the seven-day interval allowed by TS 3.1.12 and the breaching permit. The wet layup work requires draining, flushing, refilling and chemical addition to the heat exchanger.
This work also involves a largo quantity of water to be processed and hence required a longer time interval than seven days.
ANALYSIS OF EVENT This event is being reported in accordance with action statement (a) of LCO 3.7.12.
A roving fire watch was established to inspect the 1B-B RHR and CS heat exchanger room on an hourly basis as required by tho associated action statement.
In addition to the fire watch, the existing fire detection and supprossion system for the RHR and CS heat exchanger room was operable during the time the fire door was breached and would have actuated in the event of the fire. Thus, there was no degradation in the overall level of fire protection at the plant.
CORRECTIVE ACTION An hourly fire watch patrol was established inmediately upon breaching the fire door to inspect the RHR and CS heat exchanger room. The fire watch was maintained until the door was returned to operable status at 0200 EDT on August 9, 1988. No further action is required.
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