05000317/LER-1981-064-03, /03L-0:on 810813,diesel Generator 11 Lost Speed Control & Several Control Room Indications During post-maint Testing.Caused by Blown Fuse.Fuse Replaced & Generator Tested

/03L-0:on 810813,diesel Generator 11 Lost Speed Control & Several Control Room Indications During post-maint Testing.Caused by Blown Fuse.Fuse Replaced & Generator Tested

ML20010G657
Person / Time
Site:	Calvert Cliffs
Issue date:	09/11/1981
From:	Junge M, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20010G655	List: 05000317/LER-1981-064, Forwards LER 81-064/03L-0 05000317/LER-1981-064-03, /03L-0:on 810813,diesel Generator 11 Lost Speed Control & Several Control Room Indications During post-maint Testing.Caused by Blown Fuse.Fuse Replaced & Generator Tested
References
LER-81-064-03L, LER-81-64-3L, NUDOCS 8109220366
Download: ML20010G657 (1)

LER-1981-064, /03L-0:on 810813,diesel Generator 11 Lost Speed Control & Several Control Room Indications During post-maint Testing.Caused by Blown Fuse.Fuse Replaced & Generator Tested

Event date:
Report date:
3171981064R03 - NRC Website

text

U.S. NUCLEAR REGULATORY COMMISSION NRC Fp 366 (7 77)

LICENSEE EVENT REPORT CONTROL BLOcct: l l

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60 61 Dutr ET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 l At 0850 during post maintenance testing, #11 Diesel Generator (DG) lost i

IO Ial I speed control and several control room indications. The diesel was l

l O 141 l immediately tripped and placed out of service (T.S. 3.3.1.1).

Redun-l lO Isl l dant AC sources were verified operable at 0915. These redundant sources l

10 i s l l, remained operable throughout the event. The diesel was repaired. tested 1

10 l 7 l l and returned to service at 1243 on 8-14-81.

This is not a repetitive l

I lOIal l occurrence.

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33 34 3b 36 31 40 41 42 43 44 47 CAUSC DESCRIPTION AND CORRECTIVE ACTIONS li lOl l A blown fuse was found to alffect the above conditions. The speed control I

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circuit was checked for shorts and grounds. No faults were found. The I

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maintenance preceeding the test was unrelated. The fuse was replaced and l

lil3l l 11 DG was run at rated capacity for an hour satisfactorily. Weekly DG l

gl starts have shown no recurrences. No preventive action is necessary.

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8 9 A S

% POWER OTHER STATUS IS O RY DISCOVERY DESCRIPTION NA l

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8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE

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I LLL] 10 l 0101@l Z l@l NA PERSONNE L INJURIES NUMBER

DESCRIPTION

l l0l0l0l@l NA 1 8 7

8 9 11 12 80 LOSS OF OR DAVAGE TO FACILITY TYPE

DESCRIPTION

l l Z lhl NA 1 9 8109220366 810911 30 7

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7 8 9 to M. A. Junge/P. G. Rizzo (301) 269-4696/4786 o

NAME OF PREPAHER PHONE:

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