ML20006F000
| ML20006F000 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/13/1990 |
| From: | Storz L TOLEDO EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| DSS-90-15016, NP33-89-021, NP33-89-21, NUDOCS 9002270060 | |
| Download: ML20006F000 (2) | |
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%a b-EISON EOlSON PLAZA 300 MAOISON AVENUE TOLEOO. OHIO 43652 0001 February 13, 1990 NP33-89-021 DSS-90-15016 Docket No. 50-346 License No. NPF-3 i
United States Nuclear Regulatory Commission Document Control Desk Vashington, D. C.
20555
'Gentlement
Subject:
Voluntary Report of the Failure to Immediately Assemble the Fire Brigade On December 15, 1989, at 1203 hours0.0139 days <br />0.334 hours <br />0.00199 weeks <br />4.577415e-4 months <br />, the Control Room received a fire suppression alarm for the Service Water Pump Room followed shortly by an alarm for the start of the Electric Fire Pump. Contrary to the requirements in the Fire Procedure, DB-0P-02529, the Fire Brigade was not immediately assembled.
Upon receipt of the alarms, an equipment operator was dispatched to the_ room.
The Control Room-operators verified, via the computer summary, that the r
service water pumps' bearing temperatures were normal. The equipment operator found water spraying above Service Water Pump 1-1 but found no fire. The sprinkler vas. isolated at 1209 hours0.014 days <br />0.336 hours <br />0.002 weeks <br />4.600245e-4 months <br />. The Electric Fire Pump was shutdown at 1213' hours. The alternate Service Vater Pump was started and the sprayed down pump was shutdown. The loads on a nearby sprayed down motor control center vere switched to an alternate bus. No permanent damage resulted from the water. The damaged sprinkler head was replaced and the sprinkler-placed back
.in' service.
The Shift Supervisor failed to take appropriate action by not immediately assembling the Fire Brigade upon receipt of the redundant, diverse indications. The decision not to assemble the Fire Brigade was based on a
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prompt verification that no smoke or fire detector alarms accompanied the sprinkler alarm and the confirmation of normal bearing temperature on all service water pumps. Therefore, the Shift Supervisor concluded that the event was limited to a sprinkler system failure.
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Docket No. 50-346
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License No. NPF-3 f
_NP33-89-021-Page 2 Toledo Edison submitted its' final response to a notice of violation for not immediately assembling the fire brigade upon receipt of any fire alarm in the Control Room-by letter dated September'30, 1989 (Serial No. 1-893). This response identified the circumstances for which Toledo Edison determined immediate assembly-of the Fire-Brigade vas warranted.
One of the criteria committed to vas that the Fire Brigade would be immediately assembled upon receipt in.the control Room of redundant, diverse indications of a fire.
This criteria was intended to eliminate diagnosis times and to assure prompt response of the Fire Brigade under actual fire conditions even if occasional assembly under non-fire conditions occurred. The safety significance of this failure to immediately assemble the Fire Brigade was minimal since no actual fire did occur.
However had there been an actual fire and a failure in the detection zone circuitry preventing the alarming, the delay in assembling the Fire Brigade could have been more significant.
The Shitt Supervisor involved and/or the Superintendent of Operations has discussed the event and the proper response, per procedure, with each operating shift.
Very truly yours, L. F. Storz
. Plant Hanager JCS/plf cc: 'A. B. Davis Regional Administrator Region III l
P. Byron NRC Senior Resident Inspector l.
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