05000366/LER-1981-064-03, /03L-0:on 810626,while Performing Diesel Generator Manual Start Surveillance Procedure on 2P43-5001A Generator, Speed Adjust Switch Found Inoperable.Caused by Synchronizing Motor.Motor Disassembled,Cleaned & Returned to Svc

/03L-0:on 810626,while Performing Diesel Generator Manual Start Surveillance Procedure on 2P43-5001A Generator, Speed Adjust Switch Found Inoperable.Caused by Synchronizing Motor.Motor Disassembled,Cleaned & Returned to Svc

ML20009E767
Person / Time
Site:	Hatch
Issue date:	07/17/1981
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009E757	List: 05000366/LER-1981-064, Forwards LER 81-064/03L-0 05000366/LER-1981-064-03, /03L-0:on 810626,while Performing Diesel Generator Manual Start Surveillance Procedure on 2P43-5001A Generator, Speed Adjust Switch Found Inoperable.Caused by Synchronizing Motor.Motor Disassembled,Cleaned & Returned to Svc
References
LER-81-064-03L, LER-81-64-3L, NUDOCS 8107280424
Download: ML20009E767 (2)

LER-1981-064, /03L-0:on 810626,while Performing Diesel Generator Manual Start Surveillance Procedure on 2P43-5001A Generator, Speed Adjust Switch Found Inoperable.Caused by Synchronizing Motor.Motor Disassembled,Cleaned & Returned to Svc

Event date:
Report date:
3661981064R03 - NRC Website

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h t o 121 10n 6-26-81. whil e oerformi no diesel aenerator manual start surveillancel lo 131 I procedure on 2R43-S001 A diesel oenerator the speed adjust switch was I

'l o 141 I found inocerative.

Tech Soecs 3.8.1.1.5 which reauire 3 separate and I

lo Isl 1 independent diesel generators could not be met.

Tech Specs surveillancel l o is i i reuni rements 4.8.1.1.1.a and 4.8.1.1.2.a.4 were oerformed.

This is a I

lo 171 I nonrecetitive event.

There were no effects upon public health and safe-l ll o la I I tv due to this event.

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33 34 3b 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 11 1011 The speed adj us t swi tch mal function was attributed to the synchronizing l li t i l I motor, a part of the diesel governor.

The motor was disassembled, foundt li l 21 I to be di rty, cleaned, and returned to service.

The diesel generator I

tilalI manual start procedure was satisfactorily completed and the diesel gen-I

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li141lerator returned to service.

No further action or reporting is required.l 7

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% POWER OTHER$TATUS DIS OV RY DISCOVERY DESCRIPTION 11 IsIlEl@ l0l9l2l@l NA l

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NAME OF PREPARER C_ l_ C000in. 94nt. P1t. Fnn-9prv. PHONE:

1 LER #:

50-366/1981-064 Licensee:

Georgia Power Company Facility Name:

Edwin I. Hatch Docket #:

50-366

. Narrative Report i

for LER 50-366/1981-064 On 6-26-81, while performing Diesel-Generator Manual Start surveillance procedure on 2R43-S001A diesel generator, it was discovered that the speed adjust switch would not raise or Iower diesel speed.

The failure of the speed adjust switch precluded matching the frequency of the diesel generator to J

the system-prior to synchronization.

Diesel generator 2R43-S001A was declared inoperable.

Tech Specs 3.8.1.1.6 which requires 3 separate and independent operable diesel generators 2

could not be met.

Tech Specs surveillance requirements 4.8.1.1.1.a and '4. 8.1.1. 2. a. 4 were performed to demonstrate operability of remaining AC sources.

l The problem with the speed adjust switch was attributed to the synchronizing

motor, a

part of the diesel governor.

The t

synchronizing motor, a split field,. series wound, reversible type, is used to remotely position the speed adjusting gear.

The motor was disassembled for in:,pect~ ion and the brushes found to be dirty.

After cleaning the motor was reassembled and returned to. service.

The diesel generator manual start surveillance procedure was reperformed with satisfactory results.

The unit is now in full com'liance, and no further p

reporting is required.

This is a nonrepetitive event.

There were no effects upon public health and safety due to this event.