ML20084U141

LER BFRO-50-296/766:on 760816,alarms Sounded in Spreading Room B W/No Fire Apparent.Caused by Increased Sensitivity Due to Dirt in Detectors.Foreign Matl Cleaned from Equipment

ML20084U141
Person / Time
Site:	Browns Ferry
Issue date:	09/15/1976
From:	Fox H TENNESSEE VALLEY AUTHORITY
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-296-766, NUDOCS 8306270068
Download: ML20084U141 (2)

Text

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[pLEASE PRINT ALL REQUIRED INFORMATION) np-q 1

6 TPs TypY ifAvf LctNst Nuvern l Al Ll Bl Rl Fl 3l l O! 0l-l 0 l O l 0l Ol O!-l 0l 0l l4 l1 l1'l1l1l l 0 l? l 01 25 26 30 31 32 7 S9 14 15 EVENT DATE REPOAT DATE T7PI SO N DOCKET NUV8EA c 1 Corn l l

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CATECCAY 68 69 74 75 60 7 8 57 58 59 60 61 EVENT DESCR!PTICN

@ l From August 16, 1976 to August 30, 1976, five alarms were received from smoke l

CD 89 The detectors l

7@@ l d::tectors in spreading room B due to increased detector sensitivity.

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7 89 (BFRO-50-296/766) l

@ b nvolved were cleaned or replaced and returned to service.

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BI 80 7 99 pgus R

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• VOLATON C E CODE COMPONENT CODE

@ l Al Bl W lIl N l S l Tl Rl Ul lL l lK l1 l2 l0 l

[tLJ 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION l

Three of the alarms were

@ l Kidde smoke detectors needed cicaning or replacement.

60 7 89 l

renlaced.

h ! from a single detector which was finally 80 7 89 I

8i 80 DISCOVEAY OESCA.PTON STA S

% POWE A OTHER STATUS O SCOVERY l

l Alarm received in control room l

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60 7 8,

9 10 12 13 44 45 46 LoCATON OF RELEASE tLkISED LIASE AMOUNT Or ACTMTV I

OF 8

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NA I

I NA 80 44 45 7 8 9

10 11 PERSONNEL EXPOSURES NUMBE R TYPE DESCRIPTION I

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NA 80 7 89 11 12 13 PERSCNNEL INJURIES I

NUMDE A DESCA'PTON 8 ! 0101 0l l

m 80 7 89 11 12 DrFSITE CONSEQUENCES l

NA DE I 80 7 89 LOSC OR DAMAGE TO FACIUTY l

TYPE DESCR:PTON l

NA 7 80 10 8306270068 760915 PUDUCITY PDR ADOCK 05000296 l

PDR 1

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s 80 7 89 ADDITIONAL FACTORS 3 [ Gradual accumulation of foreign material causes increased smoke detector

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o\\.UTro9 TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374ot

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1. /76 19 N SepteLber 15,1976 p' g,r:c., 7 17 5, f{

Mr. Horean C. Moseley, Director 4 SNgg67 U.S. Ituelcar EcDtory Codanion

,,p Office of Inspection nad Ihforcasent u.s. '

Evt:*

Rocion II W

230 Foachtree Street, Ei., 6th Floor

-s i 1 Atlanta, Goorgia.303?3 6

Dear Hr. Moseley:

/

MESEE VALLEY AUZIORITY - BR0la;S Z2IIY NUCLEAR PIAUT IRTIT 3 -

DOCET UO. 50-2iX5 - FACILITY OT.\\TIIK} LICE:CE DPR RFJORTABLE OCCuiucuC2 IumT n%50-256/766

'Ibe onclosed report in to provido details concernint., fivo alanas that vero receiveCero:2 Aucuni; 16, IV76, to Aucuat 30, Ir/76, from s2oke detectors in aproc.uinI roon B due to increnacd detector sensitivity.

'Ihip. rcroru is uulz:ittod in accorcanco with Browns Ferry Tochnical Spechfications Section 6.

Tbias event occurred on urowns torry nuc1*.e c.Lant unit 3.

Very truly yours, Mr.I33ED VALIEI AITHIORITY II. S. Fox Director of Tovar Production

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Encionure (3)

CC(Encionuro):

Director (3)

Offico of I.nnaccaent Infon.:ation and Procra:a Control

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U.S. Huelcar i tory Camaission Washincton, D.. 20555 i

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~ Director ( M Ofcico of Inarcction and 1:nforcouent i'

U.S. Nucloar Reguintory Coaainsion washincton, D.C.

20555 3

9567 u)M SENP REGION, 1

An Equ.tl Opportunity Lmployer

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