05000317/LER-1979-056-03, /03L-0:on 791001,output Voltage of Diesel Generator 11 Reached 4,800 Volts.Diesel Trip Occurred During Attempt to Lower Voltage.Caused by Loss of Calibr in Voltmeter Resistor.Resistor Replaced & Meter Recalibr

/03L-0:on 791001,output Voltage of Diesel Generator 11 Reached 4,800 Volts.Diesel Trip Occurred During Attempt to Lower Voltage.Caused by Loss of Calibr in Voltmeter Resistor.Resistor Replaced & Meter Recalibr

ML19209D131
Person / Time
Site:	Calvert Cliffs
Issue date:	10/12/1979
From:	Bauer E, Heibel R BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19209D128	List: 05000317/LER-1979-056, Forwards LER 79-056/03L-0 05000317/LER-1979-056-03, /03L-0:on 791001,output Voltage of Diesel Generator 11 Reached 4,800 Volts.Diesel Trip Occurred During Attempt to Lower Voltage.Caused by Loss of Calibr in Voltmeter Resistor.Resistor Replaced & Meter Recalibr
References
LER-79-056-03L, LER-79-56-3L, NUDOCS 7910190436
Download: ML19209D131 (1)

LER-1979-056, /03L-0:on 791001,output Voltage of Diesel Generator 11 Reached 4,800 Volts.Diesel Trip Occurred During Attempt to Lower Voltage.Caused by Loss of Calibr in Voltmeter Resistor.Resistor Replaced & Meter Recalibr

Event date:
Report date:
3171979056R03 - NRC Website

text

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60 61 DOCKET NUM8 ER 68 69 EVENT DATE 74 75 REPORT DATE 80

- EVENT DESCRIPTION AND PROBABLE CONSEOUENCES O'o lDurina a surveillance test of 11 deisel aeneratcr the indicated output voltage o

2 lwent to 4800 volts. While attempting to lower the voltage, the diesel tripped l

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lon undervoltage. #11 diesel generator was removed from service at 1335 10/1/79 and i

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Ireturncd to service at 1810 10/1/79. While'the diesel was inoperative, remaining l

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4 44 47 33 CAUSE JESCRIPTION AND CORRECTIVE ACTIONS h linvestination of the faulty voltreter showed tha+ its A.C. calibratina series I

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