05000348/LER-1978-060-03, /03L-0 on 780827:diesel Generator 2c Would Not Respond to Governor Motor Switch or Voltage Regulator Switch.Caused by Instrument Noise & Failure of Motor Pot.Pot & Fuses Replaced

/03L-0 on 780827:diesel Generator 2c Would Not Respond to Governor Motor Switch or Voltage Regulator Switch.Caused by Instrument Noise & Failure of Motor Pot.Pot & Fuses Replaced

ML19241A953
Person / Time
Site:	Farley
Issue date:	09/26/1978
From:	ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19241A943	List: 05000348/LER-1978-059-03, /03L-0 on 780830:during Rapid Load Reduction from 100% Power,Tavg Exceeded Tech Spec Limits.Caused by Attempt to Maintain Axial Flux Differential within Target Band. Control Rods Driven in 05000348/LER-1978-060-03, /03L-0 on 780827:diesel Generator 2c Would Not Respond to Governor Motor Switch or Voltage Regulator Switch.Caused by Instrument Noise & Failure of Motor Pot.Pot & Fuses Replaced ML19241A942
References
LER-78-060-03L, LER-78-60-3L, NUDOCS 7907110465
Download: ML19241A953 (1)

LER-1978-060, /03L-0 on 780827:diesel Generator 2c Would Not Respond to Governor Motor Switch or Voltage Regulator Switch.Caused by Instrument Noise & Failure of Motor Pot.Pot & Fuses Replaced

Event date:
Report date:
3481978060R03 - NRC Website

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'S REPORT DATE tio EVENT OESCRIPTION AND PROB A8LE CONSEQUENCES h

] l On 8/27/78 a spurious low-low noud level signal started the IC. 2C diesel zenerators g l(D/G). The 2C D/G frequency was observed to be 58 Hz.

It was discovered that the 2C

] D/G would not reapond to the governor motor switch or volta.le regul

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] [or manual.

T/S 3.8.1.1 requires two separate indeoendent diesel generator sets to be g l operable.

The 2C D/G was declared inoperable at 2340 on 8/27/78. and was restored to

] lan operable status at 0455 on 8/28/78. T/S 3.8.1.1 action statement requirements wer met.

The Health / Safety of the general public were not affected.

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] lThe spurious low-law pond level sianal was attributed to instrument noise.

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] jof the 2C D/G to res-)ond to voltage /soeed control was due to failure of the motor one g jpot. (MOP) and motor oper. trans. (MOT) which caused the 125V DC suppl, fuses to ble-

] l The MOP and MOT / fuses were replaced. The 2C D/G was tested satisfactorily.

'Itere ha y been no sim!lar occurrences.

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