ML20084U034

LER BFRO-50-296/7619:on 761126,during Scheduled Maint Test, Diesel Generator 3D Start Circuit 1 Found Inoperable.Caused by Relay Failure in Start Circuit 1 Speed Sensing Circuit. Relay Replaced

ML20084U034
Person / Time
Site:	Browns Ferry
Issue date:	12/14/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-296-761, NUDOCS 8306270023
Download: ML20084U034 (2)

Text

.

LIC$EE EVENT REPORT O -

[plEASE PRINT f.LL REQUIRED INFORMATION) l CONTROL BLCCK:l l l l l l l .. _

1 6

tcENSE Nuwa(n . ME TvN

{7 l89Al Ll Bl Rl Fl314l l0 ANE l0 l-l 0l 0l 0l 0l 0l-l0 l 025l l4l1l1l1l1l 26 30 l 0l 3l 31 32 l 15 l EVENT CATE REPCAT OA*i 1 CATEGopf f PE S E OCCxtf NuuSEA l l l l l' l Ll ySO l0 l 5 l0 l-\ 0 l 2 l 9 l 6l l1 l1 l2 l6 l7 l 674l l l l l l 60 QCorrT l57 58 59 61 68 69 75 7 8 EVENT DESCRfPTION start circuit 1 of D/G 3Dwas}

M [ During the performance of a scheduled maintenance test, 60 7 89 ne l

@ l found inoperable because of a relav failure in the speed sensine circuit. 60 7 8g- The relay was replaced. (BFRO-50-296/7619) l g l redundant start circuit 2 was operable. 60 7 89 I Ql 7 89 60 hl 7 89 pa,uf 60 M EA 00LAfoN O7 l El B] lEj COCE COMACNENT CCCE lRlElLlAlYlX]17 l Nl lEl1l6l0l47 44 lNl 48 12 43 7 89 10 11 CAUSE DESCRIPTION l l

@ l An Electromotive Division model 8327263 relay failed in start circuit I speed 60 7 89 l '

09 l sensing circuit, preventing the circui'. from sensine diesel soeed. The relav 60 7 89 l 1n l was replaced and the test in progress was completed. 50 C SCovE AY OisCOvfRY CEECA.PTCN

% POWER OTHEA STATUS STA us l 1

d l 0l 4l 5l l NA 44 l W45 l

46 NA 60 7 8 9 10 12 13

• LCCATCN OF DELEASE AucuNr er ACtrvirY l E ItS'EYs'Ea d (_2] os E/Ast l NA 44 l

45 l NA 60 7 8 9 10 11 '

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PERSONNEL EXPOSURES NuMecn type cEScapTCN NA l 1 l 0l 0j 0] l 5] l 60 7 89 11 12 13 PERSONNEL INJbRES N W BER OESCAtAtCN  !

EE l0l0l0l11 12l NA 80 7 89 OFFSITE CONSECUENCES ,

l NA hl 7.89 60 LOSS OR OAMAGE TO FACILITY TYPE CESCRIPTCN I uA -

60 DE Lal I 7 89 10 PUBUCITY 8306270023 761214 .'

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PDR ADDCK 05000296 PDR l

1 l S 60 4

7 89 ADDITIONAL FACTORS l

E l This was a random failure and no additional action is recuired.

7 89

., , 60

'.7 89 PHONE:

_ NAME: GPC 481 667

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owiso, O O l T 9 TENNESSEE VALLEY AUTHORITY D COPX CH ATTANOOGA. TENNESSEE 374ot .

'??6 198 December 14, 1976 Mr. Norcan C. Itoseley, Director U.S. I!uclear Regulatory Co= mission Office of Inspection and Enforcement [,

Region II , a ; ?, ~'

a 230 Peachtree Street,fiW., 8th Floor c. O,tL ^, 2 " " ' _. .

Atlanta, Georgia 30303

h. a . ';~ 2 ' ' ~

~ '

Dear Mr. Moseley:

TCCIESSEE VALLEY AUTHORITY - BROT.".iS FERRY !;UCLEAR PLM!T UNIN 3 -

DOCI'IT NO. 50-296 - FACILITY OPPRATI!!C LICCISE DPR REPCRTABLE OCCURREIICE REPORT BFR 0-296/76D The enclosed report in to provide details concerning start circuit 1 of D/C 3D that was found inoperable becauce of a relay failure in the a speed sensing circuit during the performance of a scheduled maintenance test. This report is submitted in accordance with Browns Ferry Technical Specifications Section 6. This event occurred on Brouns -

-Ferry Nu-Jen- Plont unfe 3.

Very truly yours, _

TE!!NESSEE VALLEY AUTIIORITY .

/

.- II. S. Fox <- ,

Director of Power Production f vgw REGION

/

Enclosure (3) >

CC (Enclosure):

Director (3)

Office of !!anagement Information and Program Control I

U.S. 1uclear Reguintory Connicsion Washington, I.C. 20555 nirecenr (40)

Office of Inspection and Enforcement U.S. !!uclear Regulatory Co=:aission Washington, D.C. 20555 I l

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c'hY.(

i An Equal Opportunity Employer

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