ML20247K133
| ML20247K133 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 09/15/1989 |
| From: | Michael Ray TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 89-08, 89-8, NUDOCS 8909210085 | |
| Download: ML20247K133 (2) | |
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- E TENNESSEE VALLEY AUTHORITY CHATTANOOGA TENNESSEE 37401 SN 1578 Lookout Place SEP 15:1989 U.Si Nuclear Regulatory Commission 4
~ATIN:. Document Control Desk Washington, D.C. '20555 s
" Gentlemen:
1
. TENNESSEE VALLEY AUTHORITY - SEQUDYAH NUCLEAR PLANT UNIT 1 - DOCKET NO.
50- 327 FACILITY OPERATING LICENSE DPR-77 '- SPECIAL REPORT 89-09 y
jThe' enclosed special report pvvMes details concerning: a' fire barrier being
- nonfunctional for an interva? jrs ater than seven days. This event is reported g
in accordance with Action Statement (a) of Limiting Condition for Operation 3.7.12 If you' have: any questions concerning this submittal, please telephone -
M. A. Cooper at (615) 843-6651.
Very truly yours, TENNESSEE VALLEY AUTHORITY Manage, Nuc1 censing and Regulatory Affairs Enclosure cc:(Enclosure):
Ms. S. C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. B. A. Wilson, Assis' tant Director for Inspection Programs TVA Projects Division U.S. Nuclear: Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 NRC Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 N#1 kObb C
7
,i An Equal opportunity Employer
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ENCLOSURE SPECIAL REPORT 89-09 UNIT 1 Description of Event On August 25, 1989, with Units 1 ard 2 in Mode 1, at 100 percent power, 2,235 pounds per square inch gauge, 578 degrees Fahrenheit, two fire barriers (Fire Doors A-25 and A-28) were nonfunctional for an interval greater than seven days.
Fire Door A-25 is on auxiliary building Elevation 669 serving the Turbine-Driven Auxiliary Feedwater Pump (TDAFWP) 1A-A room.
Fire Door A-28 is in the same building location serving the Centrifugal Charging Pump (CCP) 1A-A room. The two fire doors were breached on August 17, 1989, to run a temporary hose line from a leaking room cooler in the CCP room to the floor drain in the l
TDAFWP room. As required by the action statement of LCO 3.7.12, a roving fire watch was established, and fire detectors in the area were verified operable within one hour.
Cause of Event The floor drain in the CCP room leads to the tritiated drain collector tank (TDCT), while the TDAFWP room floor drain leads to the turbine building sump.
The CCP room cooler is leaking essential raw cooling water (ERCW) from its cooling coils.
Because ERCW is simply river water, it is not prudent or cost-effective to treat it as radiological waste.
Thus, the decision was made to run a temporary hose line from the CCP room cooler through the two fire doors to the TDAFWP room floor drain.
The temporary hose line will remain in place until the CCP room cooler is replaced.
Analysis of Event This event is being reported in accordance with the requirements of Action Statement (a) of LCO 3.7.12.
A roving fire watch has been established to inspect the CCP room and TDAFWP room area on an hourly basis as required by the action statement of LCO 3.7.12.
The existing fire detection and fire suppression system for the affected area is operable and would actuate in the event of a fire.
Therefore, there is no danger to safety-related equipment.
Corrective Action The roving fire watch will remain in effect until the CCP room cooler is replaced, the temporary hose line removed, and the fire barriers restored to functional status.
It is anticipated that this work will be completed by September 20, 1989.
Commitment None.
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