ML20084U026

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LER BFRO-50-260/771:on 770101,alarm Sounded from Smoke Detector in Reactor Bldg & Would Not Clear.Caused by Increased Sensitivity.Alarm Replaced
ML20084U026
Person / Time
Site: Browns Ferry Tennessee Valley Authority icon.png
Issue date: 01/28/1977
From: Fox H
TENNESSEE VALLEY AUTHORITY
To: Moseley N
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
LER-BFRO-50-260-771, NUDOCS 8306270009
Download: ML20084U026 (2)


Text

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UCENSEE EVENT REPORT CONTROL 8 LOCK:l l

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l (PLEASE PRINT ALL REQUIRED INFORMATION) 1 6

ifAVE LCENSE NUMBER PE TYPE l A l L l Bl Rl Fl 2l l 0l ol-l ol 0 l 0 l n l n !-l nl n!

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7 89 14 15

' 25 26 30 31 32 CA16 GORY

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$7 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION Q ]During normal operation, a false alarm which would not clear was received from a l

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3[ l smoke detector in the reactor bide.. elevation 565.

The detecene una ran1ncaa-e 80 7 09 EE lThis is a renetitive nrnh1,,_

(BFRO-50-260/771).

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CODE COMPONENT CODE SUPPUER R

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7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION Q ] Kidde Walter Co., model 1201, smoke detector caused a false alarm in the control 7 89 80

' MG l room due to increased sensitivity.

7 89 80 DE I I

Facory METHOO OF status

% POWER OTHER STATU3 OrSCOvtAv OISCOVERY DESCAtPTON 3

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Alarm received in control room l

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10 12 13 44 45 46 80 A ES OF AMOUNT OF ACTh,tTV LOCATON OF AELEASE E

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10 11 44 45 80 PERSONNEL EXPOSURES NUMBEA TYPE DESCA@ TON I

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na 7 89 11 12 13 80 PERSONNEL INJURIES NUMBE R DE SCRIPT ON lo l ol ol I l

14 ni 7 88 11 12 80 OFFSITE CONSEOUENCES Hl NA l

7 89 80 LOSS OR DAMAGE TO FACILITY T v eE DESCAiPTON E [Hj l

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8306270009 770128 7 89 1

80 PDR ADOCK 05000 PUCLICITY DE I NA S

l 7 60 80 ADDITIONAL FACTORS l

HI nA 7 89 80 E

l 7 8 'l 80 NAME:

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TENNESSEE VALLEY AUTHORITY CHATTANOOG A. TENNESSEE 37401

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/s January 28, 1977

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Mr. Norman C. Moseley, Director m omen, g

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U.S. Nuclear Regulatory Conssission

'ag' Office of Inspection and Enforcement

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Region II 230 Peachtree Street, NW., Suite 1217 Atlanta, Georgia 30303

Dear Mr. Mcseley:

TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UNIT 2 -

DOCKET NO. 50-250 - FACILITY OPERATING LICENSE DPR REPORTABLE OCCURRENCE REPORT BFRO-50-260/771 The enclosed report is to provide details concerning a falas alarm which would not clear that was received from a smoke detector in the reactor building, elevation 565, during normal operation. This report is submitted in accordance with Browns Ferry Technical Specifications 1

Section 6.

This event occurred on Browns Ferry Nuclear Plant unit 2.

Very truly yours, TENNESSEE VALLEY AUTHORITY i

E. S. Fox

' Director of Power Production

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Enclosure (3)

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Director (3) j s

Office of Management Information and Program Control U.S. Nuclear Regulatory Commission l

Washington, D.C.

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Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.

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