05000269/LER-1981-003-03, /03L-0:on 810125,dc Input Fuse in 1DID Vital Inverter Blew,Causing Inverter to Lose Power source.1DIB Inverter Tripped When Ac Output Breaker Apparently Opened. 1DID Trip Caused by Blown Fuse.Cause of 1DIB Trip Unknown

/03L-0:on 810125,dc Input Fuse in 1DID Vital Inverter Blew,Causing Inverter to Lose Power source.1DIB Inverter Tripped When Ac Output Breaker Apparently Opened. 1DID Trip Caused by Blown Fuse.Cause of 1DIB Trip Unknown

ML20005A804
Person / Time
Site:	Oconee
Issue date:	02/24/1981
From:	Jackie Jones DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20005A800	List: 05000269/LER-1981-003, Forwards LER 81-003/03L-0.Detailed Event Analysis Encl 05000269/LER-1981-003-03, /03L-0:on 810125,dc Input Fuse in 1DID Vital Inverter Blew,Causing Inverter to Lose Power source.1DIB Inverter Tripped When Ac Output Breaker Apparently Opened. 1DID Trip Caused by Blown Fuse.Cause of 1DIB Trip Unknown
References
LER-81-003-03L, LER-81-3-3L, NUDOCS 8107010283
Download: ML20005A804 (1)

LER-1981-003, /03L-0:on 810125,dc Input Fuse in 1DID Vital Inverter Blew,Causing Inverter to Lose Power source.1DIB Inverter Tripped When Ac Output Breaker Apparently Opened. 1DID Trip Caused by Blown Fuse.Cause of 1DIB Trip Unknown

Event date:
Report date:
2691981003R03 - NRC Website

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io,2i I On January 25. 1981. D. C. inout ruse in 1DID vital inverter blew, causing the g fTTT1I inverter to lose its power source.

The 1DIB inverter tripped when A. C. out-g ITf71I out breaicer was aooarentiv opened while personnel were working on 1DID inverter, fTTTI l A second trio of IDID inverter occurred when personnel mistakenly opened A. C. :

i o #, i f outout breaker while de-energizing 1DID.

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'.'r3*.'.D vere lotrlI de-enereiz'ed, they were not simultaneous.

Thus the health and safety of the t26eiI oublic were not endangered.

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t i 6 o 1 I The ftrs-trio of 1DID was caused by blown fuses.

The cause of the 1D13 trip ii e i i l is not exactly known.

1DID tripped again as a resul,t of the A. C. output m I breaker mistakenly being opened.

Fuses were replaced, inverters were returned,

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