ML20084U029

LER Bfro 50-259/774:on 770111,alarm Sounded in Spreading Room a Smoke Detector & Would Not Clear.Caused by Increased Sensitivity.Detector Replaced

ML20084U029
Person / Time
Site:	Browns Ferry
Issue date:	02/03/1977
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-259-774, NUDOCS 8306270013
Download: ML20084U029 (2)

Text

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EE EVENT REPORT .

CONrnOt stOCol - 1 l

Upl l l 1 . pocas ,amt Att as: vias 3 =r:rm. riom .

1 6 E TYPE LCENSE NUMBER l 1 ' l1 l1 l1"30l l0l3l NA E ,

o1 lAlLlBlRlFl1l 14 l0 l0 l-l0 l 0 l o l oI n!-l nln l25} A 26 15 31 32 7 89

' - EVENT OATE AEPORT OATE CAff COAY - TIF SOu doc <E T NUM9EA l l l l l l l O CON 11 l l ,d l_LJ l0 l 5l 0 l-l OI2 l 5 l 968l l 69 0 l 1l 11 Il 7l 71 74 75 80 7 6 57 58 59 60 51 EVENT DESCRIPTION

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received rene n l Q [During normal operation, a false alarm which would not clear unn 80 7 89 The detector was l Q l smoke detector in Spreading Room A. This is a vennefrive nenh1 -

80 7 89 l M l replaced (BFR0 50-259/774). 80 7 89  !

$l 7 8g 80 I

@l 7 89 pRuf 00 M R VOLATON CODE COMPONENT CODE M

E lA lB } j l Il NI Sl Tl R l U l 17 d43 44 l Kl 1l 2 l 0l 47 d48 7 89 10 11 12 CAUSE DESCR1PTION gg lThe smoke detector, Kidde Walter Co. , model FT-200. failed due to incronand 7 89 gg l sensitivity causing a false alarm in the control room. The daractnr una vap1araA g 7 89 g 80 DISCOVERY OtSCOVERY DESCAPTON Sta os  % POWER OTHER STATUS 1

W l n! 1l c;l l Unit 2 at 100%

12 13 44 l W45 l Alnrm rocaived in control room 46 80 7 8. 9 10 LOCATOff OF HELEASE ELE EO OF L ASE AMOUNT OF ACTMTV NA l

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9 dl10 11

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80 PE ASONNEL EXPOSURES NUMBER TYPE DESCRPTON I

DE lo lo 101 L2J l ni 80 7 89 11 12 13 PEASONNEL INJURIES . .

NUMBE R DESCaPTION I

8 101 o10111 - 12 7 89 I ui 80 OFFStTE CONSEQUENCES '

l El NA 80 7 89 LOSS OA DAMAGE TO FACILITY TfD6 DESCAPTON l

bdl 7 89 10 NA PtJBLICITY l

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8306270013 770203 ADDITtONAL FACTOPS PDR ADOCK 05000259 S PDR-h(

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& TENNESSEE VALLEY AUTHORITY k f ' CHATTANOOGA TENNESSEE 37401 NEM NIT w . .. . __$ g w- - -

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<./;. February 3,.1r/7 ( 7, i_

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r, , c Mr. Norman C. Moseley, Director g .gg gp *Q

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U.S. Nuclear Regulatory Cotanission ,

Office of Inspection and Enforcement g M s %(mitamIS Region II 8 230 Peachtree Street, NW., Suite 1217 Atlanta, Georgia 30303 @

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Dear Mr. Moseley:

TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UNIT 1 - -

DOCKET No. 50-259 - FACILITY OPERATING LICENSE DPR REPORTABLE OCCURRENCE REPORT BFRO-50-259/774 The enclosed report is to provide details concerning a false alarm which would not cicar that was received from a smoke detector in spreading room A during normal operation. This report is submitted in accordance with b .,

Browns Ferry: Technical Specifications Section 6. , This event occurred on;- .. *a

, Browns Ferry Nuclear Plant unit 1.

Very truly yours, j '

TENNESSEE VALLEY AUTHORITY M. S. Fox Director of Power Production Enclosure (3)

CC (Enclosure):

Director (3)

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Office of Managemeny Information and Program Control U.S. Nuclear Regula ory Commission Washington, D.C. 2 555

, Director (40) _

Office of Inspection and Enforcement . ,

U.S. Nuclear Regulatory Commission Washington, D.C. 20555 9

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/175 l '

An Equal Opportunity Employer i

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