ML20084U260

LER BFRO-50-296/763:on 760713,eight Alarms Received from Smoke Detectors in Spreading Room B.Caused by Increased Sensitivity Due to Flamemastic Spraying & Low Voltage. Detectors Cleaned

ML20084U260
Person / Time
Site:	Browns Ferry
Issue date:	08/11/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-296-763, NUDOCS 8306280384
Download: ML20084U260 (2)

Text

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LICENSEE' EVENT REPORT CONTf40L DLOCK:l l l l l l LEASE Pattaf ALL REOutnED INrc'tP1AY10N)

M, ' . 1 6 LClfer.t tvlNi LICf NSEC LCENSE NUVALA TYPt t vet NAt/t jlAl1.IBlalr13I14 I oI ol--Io.l. ol 91 o I o I-I o ! o25i I 4I i l 1I ii 30il I of 31 31 32 J9 15 26 (VENT CATC F=f >03*f CA t t CAftCOAY TP OOCrti NUMDf A i lol7Islalvisi I I I I I i I i iCONT I I I lt. J Lt.l l o i s i ol-l o l2 19 1 61 74 75 63 57 50 59_ 60 61 68 US EVENT OESCR PTION

1. l

!From July 13, 1976 to July 31, 1976. eight alarms were received from smoke deer.ctnr= 03 in spreading room B, due to increased sensitivity. The detectors involved were I cu

'i l cleaned or replaced and returned to service, RFRO-50-296 /76't l 40 9

I I E2 9  !

l .so U pn:us systru COMputatNr CC'.*M .t'a CAuSE utwscWEH vioLAtua CODE CODE COMPordif47 CODE St#w(n l AlB l (E_) (IlNISiTlRIUl17 (_L_l 43 44

[KI1!210I47 b40 9 10 11 12_

CAUSE GESCR.PTION

' { Kidde smoke detectors needed cleaning or re2_a_cemggt. 1 The inrce amnnne afflamemnatic..J u3 9

lrpraying in progress in spreadinn room B_probably ennet.ihneert en ek. o t s ,,, e c0 9

is i eo b.

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FAca>T y METHOO OF OTHER STATUS ONCOstav OrSCOvtAY OtSC4P*:Of4 ,

Status  % POWER

'i d I ol of of 1 MA Ik45 i Alarm received in control roqm___

00 '-

l (0 4

9 10 12 13 44 46 FOAM OF AMOUNT OF ACTivrtY LOCATCN OF AELEASE 05 EL ASE

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Lt htD ta_J lil I na l I = l[

1 9 10 11 44 45 . tiOl PERSONNEL EXPOSURES NUMBEH TYPE OLSCRIPTON I

~) I olo I o I l-aj l NA -

tiO t3 0 11 12 13 9 PERSONNEL INJURIES NUM0tR OLSCA. PION 1

1101 olo 11 l 12 I n 60 0D OFFSITE CONSEQUENCES NA I

.jl CO UU LOSS OR DAMAGE TO FACIUTY 8306280384 760811 -

TvPt Otsene:CN PDR ADOCK 05000296 NA S PDR l 21Le 69 I

to PUBLICITY I NA LG l.

eo ADDITIONAL FACTORS

} l Also the detector voltage was found slight.1L ,.,03_And _

1 raised to normn L Bradua1. .. ..!..o j

El!accumulationofforeignmaterialcausesincreasedsmokedetectorsensitivity.

.a i, y C =- e~a cone-._ .

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40 *"04 4 C's g[jg._,

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g TENN*ISSEE VALLEY AUTHORITY -s -

4g CHATTANOOGA. TENNESSEE 374ot it to g COPTl We.w16 August 11, lW6 Hr. Nor.nn C. licacicy, Director U.S. Iluclear Regulator / cn niscion Ro$on II 230 Peachtreo stract, Iu., 6th Floor Atlanta, ocor;ia 30303  !

i Doar Mr. Hooclcy:

T 2EIIU3EE VALII"I A172IORITI - B1011D FI'RtY IiUCI2:AR FIAllT EIIT 3 -

DOCIGi:T N0. 50-2% - l'ACILITI OPI21ATIIU LICEIDE D.R REPontAnLE oCCuanarcE REroaT Dino-50-2W/763 Bio enclosed report is to provide details concerning cidit alarcs vhich vero roccived fro.2 JuW 13,1976, to July 31, lW6, frots ar.oko detectors in apreadits roo.a D due to scnaitivity. 211a report in cuir.itted in accordanco with Apped E to Regulator /

Guido 1.16, acvision l+, Aucuat 1//5 311a event occurred on Browns Ferry Huclear riant unit 3 Vor/ truly youra, 9' %

N Ti2iNE3 GEE VAIJrl AUDDRITI -

s gMpg H. D. Ibx L- v Director of Fover Production 4-

/ /.

Enclosuro (3)

CC (Enclosuro): ,

Director (3)

Offico of lunaccuent Infor.mtion and frogreta Control U.3. Haclear 11cculatory Coi. :issiori Washiruton, D.C. 20555 1

nivoctor (110) I Offico of Inspection and Enforecaent U.S. Nuclear Regulatory Cou.aission Washington, D.C. 2cS55 COPY SENT REGION ,, - - .

An Equal Oppos tunity Employer

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