ML17266A369

LER 80-058/03L-0:on 801019,target A-16 Alarmed (Diesel Generator 1B Failure to Start).Caused by Open Feeder Breaker to PP-112.Feeder Breaker Closed

ML17266A369
Person / Time
Site:	Saint Lucie
Issue date:	11/18/1980
From:	Pace P FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17209A399	List: ML17209A398 ML17266A369
References
LER-80-058-03L, LER-80-58-3L, NUDOCS 8012020567
Download: ML17266A369 (3)

Text

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~o~ fai lure to tar Ourin investi ation the OG lockout alarm wa i found'eenergized.

actuated. The lockout alarm was reset and the diesel was started to verify ooerabi lit . While troubleshootino the rom l feeder breaker from MCC-187 was found o en. MCC-which supplies power to various corn onents. The feeder breaker wa l

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                                                                                                                                        /0AM)ud.           SVPPUSA 05.'S MANUPACTUAPA IIJaIaI-'G CAUSE OESCAIPTIO I AIVO CQAREC' }VE.ACTIONS Q)7 The. open                   feeder breaker to PP-112 has been attributed to backfit work beina oerformed i                                                                                                        0    erabilit of
                  ,diesel was not affected.                                               This is the                 first LER            of this            t     oe.

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Reportable Occurrence 335-80-58 Licensee Event Report Pa e- Two Loss of power to PP-112 resulted in the loss of several auxiliaries to the 1B'iesel. These included the exhaust differential temperature alarm, the fuel supply shutoff, valve I-SE-17-1B, and both water heater banks. Loss of the water heater banks would represent a problem only in a Iong term situation. I-SE-17-1B is. a solenoid valve which fails shut on loss of. power; It is located between the diesel oil storage tanks: and the day tanks.. It is controlled. by level sensing limit switches that maintain the level in the day tanks. Each day tank is capable of supplying each diesel at full load. for 100 minutes. There are high and low level alarms. to alert operators to abnormal day tank level These alarms will allow sufficient. time for operator action to restore. fuel oil to the day tanks and therefore maintain the diesels. running. Loss of power to PP-112 did'ot affect any diesel instrumentation systems.

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