05000334/LER-1980-018-01, /01T-0:on 800326,plant Operators Were Testing Temporary Fire Pump When Section of Fire Main Failed.Caused by Piping Failure.Failed Section of Piping Replaced

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/01T-0:on 800326,plant Operators Were Testing Temporary Fire Pump When Section of Fire Main Failed.Caused by Piping Failure.Failed Section of Piping Replaced
ML19305D797
Person / Time
Site: Beaver Valley
Issue date: 04/08/1980
From: Werling J
DUQUESNE LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19305D782 List:
References
LER-80-018-01T, LER-80-18-1T, NUDOCS 8004150534
Download: ML19305D797 (2)
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LER-1980-018, /01T-0:on 800326,plant Operators Were Testing Temporary Fire Pump When Section of Fire Main Failed.Caused by Piping Failure.Failed Section of Piping Replaced
Event date:
Report date:
3341980018R01 - NRC Website
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60 61 QOCnETsyv8ER 64 69 EVENT DATE J4 15 REPORT OATE 40 EVENT DESCRIPTION AND PRO 8ABLE CONSEQUENCES h l Plant operators were testing the temporary fire pump when a section of the fire main [

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l pressure never rose above 120 psig during a half-hour testing period prior to 1620 l i

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lo 171 l {FP-P-31 was running prior to and during this surveillance test.

Between the time I i o is l l period of 1610 hours0.0186 days <br />0.447 hours <br />0.00266 weeks <br />6.12605e-4 months <br /> to 1620 hours0.0188 days <br />0.45 hours <br />0.00268 weeks <br />6.1641e-4 months <br />, while testing was in (continued on attached)l 80 SYSTEM CAU$E

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l 34 35 06 31 40 en 42 43 44 47 33 CAUSE OESCRIPTION AND CORRECTIVE ACTIONS h i i ; o i l The cause of the incident was piping failure. The piping section will be lab y l tested for further insight into the failure mode. This is the second failure of l this type. The failed section of piping has been replaced.

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'O J. A. Werling 412-643-1258 2

NAME OF PREPARER _

PHONE:

800D 5053L

Attachment To LER 80-18/01T Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 Event Description And Probable Consequencesprogress, system pressure dropped to 95 psig, causing Diesel Driven Fire Pump [FP-P-2] to start. The system pressure increased and the Diesel Pump (FP-P-2] was throttled back, again, system pressure dropped. The operator then increased the speed of {FP-P-2] again and, at approximately 1620 hours0.0188 days <br />0.45 hours <br />0.00268 weeks <br />6.1641e-4 months <br />, the system pressure dropped to 25 pounds. This is the point at which the fire main failed. There was a minimal safety hazard because the operators were aware of the failure and had it isolated in eight minutes.

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