ML20084T884

LER BFRO-50-259/7618:on 760903,smoke Detector Panel Failed to Operate.Caused by Water Entering Panel from Concrete Drilling Operation.Work Instructions Revised to Ensure Fire Alarm Panels Adequately Protected

ML20084T884
Person / Time
Site:	Browns Ferry
Issue date:	09/29/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-259-761, NUDOCS 8306240242
Download: ML20084T884 (3)

Text

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. LICENSEE e

EVENT REPORT

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. CONTROL D'.CCK. l l l l l l LEAct p;t:NT ALL , fjd . 1JrDt;7pTIOtJ)

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7 o 57 59 59 GO 61 66 69 74 EVENT CESCn:PTION g l A smoke detector panel failed to ooerate after t.:ater fro:n a concrete drilling l 7 uo 83 Q l cperation entered the panel. %c nanel t an dried out and covered to prevert water l

, from enterir.9 it. ((khRO-50-253

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@B I 60 7 89 . pays systtu CAvst councAten CCvPC n .T CCOC C'.J M COMPCNENT CCDE SUPPLiA U.WUFGIL T-EH VCt.ATON M l Al Bl 7 tl 9 10 W 11 12 lI lN lS l Tl Rl Ul 17 l Ll 43 l Kl 1l 2l 0l 44 47 lNl 48 Ct.USE CE3CR91;ON Q l n e panel uns inadeauatelv protected from unter durine tie dri'.line ooeratie,. l

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(_f) 9 l0l0l0l l NA l 44 lAl 45 l Alarm received in coritrDLteen 46 60 10 12 13 FCu;,4 Os 2 (55 0 05 E EASE AMOUNT OF ACIM1Y LOCAllCN OF MELEASE 8

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PERSONNEi. EXPOSURES

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PERSONNEL INJUR:ES Nt.Wi n CCSCr PTON 810 l 01 Ol I NA I l7 t1 D 11 12 BJ OFrStTF. CONSEQUENCES 3l

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__ l ea LOSS On DAMAGE TO FACit TY PDR ADOCK 05000259 Ctsc.tpt ON s PDR l7@63[Tv>f3.]

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O3 td ADDlWeN.it. f/0tOas ,

.h:][Uorkinarrnctions invohed wit.h drillin,a, have been reviced to ennute fira alarn  !

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p 9 TENNESSEE VALLEY AUTHORITY -

CH ATTANOCG A TENNESSEE 374o1 4 e

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%e ..et September 29, 1976 ,

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Mr. Nor=an C. Moseley, Director U.S. Nuclear Regulatory Cocmission

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J Office of Inspection and Enforcement g g g* /3/32 Region II i W 230 Peachtree Street, NW., 8th Floor ks.p;,@ ,,,

Atlanta, Georgia 30303

Dear Mr. Moseley:

. b' TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR FIANT UNIT 1 -

DOCKET NO. 50-259 - FACILITY OPERATING LICENSE DPR REPORTABLE OCCURRENCEREPORTBFROQO-259176183 The enclosed report is to provide details concerning a smoke detector panel that failed to operate after water from a concrete drilling operation entered the panel. This report is subuitted in accordance with Browns Ferry Technical Speci11 cations Section 6. This event occurred on Brovns Ferry Nuclear Plant unit 1 Very truly yours, TENNESSEE VALLEY AUTHORITY f

/

-h +/.

H. S. Fo.x Director of Power Production Enclosure (3)

CC (Enclosure):

Director (3)

Office of Management Infor=ation and Program Control U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Director (40)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Con =ission Washington, D.C. 20555 100E An ECu2? COC0r tyrity E~c cyr GOPY SENT REGION

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LigSEE EVENT REPORT

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CONTROL BLOCK:l l l l l l l [ptEA s PR::JT ALL REEUIREO INFR@ATJpiJ) 6 #

1 Yt. )E tctNSE NUV8EA PE TY E o1 l A l Ll Bl Rl Fl 1l l 0l 0l-l0 l 0 l 0 l 0 l 0l-l 0l 0l l 4l 1l 1l 1l 1l 30 l 0l 3l 32 7 G9 14 15 25 26 31 CATECCRY T7pU $NE DOCKET NUMSEA EVENT CATE RFPORT CATE

[dIIlCON'T l l l W l Ll l 0l 5! 0l-l 0l 2I 5l 9{ l0l 9l 0l 3l 7I 6l 74 l

75 l l l l l_j 80 7 3 57 SS 59 60 61 68 69 EVENT DESCR:PTION

[5iil l A scioke detector pa.tel failed to operate af ter water from a concrete drilling l 7 89 80 EIil l cperation entered the onnel. The canel teas dried' out and covered to orevert water l 7 0S . 60 h,l fren enterins it. (BFRO-50-?59 /7518)

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7 63 IERl l l 7 c. 9 - S3

@l 7 89 . psvas 80 l

E C ! COMPONENT CCCE MANL . L EA vc:J.TCN

@ l Al Bl (A_] lI lN lS l Tl Rl Ul l Ll l K! 1l 2l 0l l Nl 7 dS 10 11 12 17 43 44 47 48 CAUSE DESCR!aT:ON

[ l The panel was inadequate 1v protected from unter durine the drillin? oceratiOm. OO t 7 2O l l 7 03 ,

80

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sA0luf f UETHOD CF l DISCOVErlY DESOR PT. Ore

$?ATL*S  % PCWER OTHER STATUS 0:S00VERY 7 8 1

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l0l0l0l l 10 12 13 NA 44 l d45 l Ala T:t received in control roen 46 60 S O AMOUNT OF ACTrVITY LOCATON OF AELEASE b d $k EA5E l

(,E_j NA l l NA 63

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7 8 9 10 11 44 45 PERSONNEL EXPOSUR:ES NUA*EtR T4 Pi OESCR PTON

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SG PERSONNEL INJUR:ES l NtN6f A DESO A PitCN

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l 0FFO:TE CONSFJUENCES 8l 7 89 NA 60 l

LOSS OR DAMAGE TO FACILITY ,

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PUOLCTY ,/

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)o AcciTIONAL UCICAS .

@] l Work instructions involved with drilling have been revised to ensure fire alarm ,_l ia9 60

('t[j l Dancis are adequately protected. l

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