ML19305D797

LER 80-018/01T-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

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: ML19305D781 ML19305D794 ML19305D797 ML19305D809
References
LER-80-018-01T, LER-80-18-1T, NUDOCS 8004150534
Download: ML19305D797 (2)

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J4 15 REPORT OATE 40 8 8 60 61 QOCnETsyv8ER 64 EVENT DESCRIPTION AND PRO 8ABLE CONSEQUENCES h o 2 l Plant operators were testing the temporary fire pump when a section of the fire main [

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l pi-lTj l f ailed. During performance of the surveillance test on the portable fire pump l l In fact, system l l o 14 l l mentioned above, there was a problem maintaining system pressure. ,

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o s l pressure never rose above 120 psig during a half-hour testing period prior to 1620 l 10 is 1 I hours when the failure occurred. The Hvdropneumatic Pressure Maintenance Pump i 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 CAUSE COMP. VA LV E CODE CODE SUSCOCE COMPONENT CODE ,U8C00E SUSCODE l A lB l@ lE l@ lC l@ lP lI lP lE lX lX l@ 'D ]@ lZ l@ ,

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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

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, 2 l this type. The failed section of piping has been replaced. g I i L.' l.3! I i l

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• bPowER OTHER STATUS Dis O RY DISCOVERY DESCRIPTION STA ITTi'l W@ l 0l 010l@lDesien Change l l B l@l Visual: operator observation l l n w tage 44 45 4e w 8 ,cy,y,7y co'j,,y, 12 l LOCATION of RELEASE I RELEASED OP RELE ASE AMOUNT OF ACTIVlTY i e 3/A I I N/A l 7 8 9 LzJ @ LzJ@l 10 tt 44 45 80 PERSONNEL E RPO5URES NUV8ER TYPE DESCRIPTtON i 7 1010l0l@lZ]@l N/A a

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G45CRiPTION 2 o IN 155UEI81 n/A i i i i i i i i i iiiil1 8 8 9 'O 64 69 30 5 J. A. Werling PHONE:

412-643-1258 2 NAME OF PREPARER _

800D 5053L

Attachment To LER 80-18/01T Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 Event Description And Probable Consequences (continued) progress, 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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