05000315/LER-1985-053, :on 851011,determined That in Event of Actuation of CO2 Suppression Sys Protecting Fire Zones 41 or 45,fire Dampers Not Designed to Close Allowing Gas to Flow Out of Zone.Openings Closed Permanently

:on 851011,determined That in Event of Actuation of CO2 Suppression Sys Protecting Fire Zones 41 or 45,fire Dampers Not Designed to Close Allowing Gas to Flow Out of Zone.Openings Closed Permanently

ML20136E639
Person / Time
Site:	Cook
Issue date:	11/11/1985
From:	Stietzel J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML20136E625	List: 05000315/LER-1985-052, :on 851012,failure of Critical Control Room Power Inverter Resulted in Momentary Loss of 120-volt Regulated Control Room Power.Caused by Shorted Diode & Capacitor & Blown Fuses.Components Replaced 05000315/LER-1985-053, :on 851011,determined That in Event of Actuation of CO2 Suppression Sys Protecting Fire Zones 41 or 45,fire Dampers Not Designed to Close Allowing Gas to Flow Out of Zone.Openings Closed Permanently ML20136E619
References
LER-85-053, LER-85-53, NUDOCS 8511210541
Download: ML20136E639 (1)

LER-1985-053, on 851011,determined That in Event of Actuation of CO2 Suppression Sys Protecting Fire Zones 41 or 45,fire Dampers Not Designed to Close Allowing Gas to Flow Out of Zone.Openings Closed Permanently

Event date:
Report date:
3151985053R00 - NRC Website

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NRC Poem 338 U.S. NUCLEAW LEiULATORY COMMtES#Oes 8M APPROYED OMS NO. 3150-0104

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LICENSEE EVENT REPORT (LER) l F ACILITV NA:#E (11 DOCKET NUMeER (2)

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DONALD C. COOK NUCLEAR PLANT, UNIT 1 0 l5 l 0 l 0 l 01311 15 1 lOFl 011 TITLE les POTENTIALLY INOPERAELE CO,, FIRE PROTECTION SYSTEM EVENT DAf t (Si LER NUMSER (S)

REPORT DATE 171 OTHER F ACILITIES INVOLVED 18)

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MONTM DAY YEAR F ACILif v me AMES DOCKE T NuMBERi$1 MONTH DAY YEAR YEAR D.C. COOK, UNIT 2 0 15101010 I 31116 1l 0 1l 1 8l5 8 l5 0 l5 l3

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0l0 1 l1 1l1 8h o isto io I 0 i l l Tuis REPORT is sueMiTTED PURSUANT TO TwE REOUtREMENTS OF 10 CFR l. ICAwk one or more or tee renow,ngs it13 5

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NAME TELEPHONE NUM8ER ARE A CODE J.F. STIETZEL - QUALITY CONTROL SUPERINTENDENT 6l 1 6 4,6,5 t1 59 1 01 i

i COMPLETE ONE LINE FOR EACH COMaONENT F AILURE DESCRISED IN TMt3 REPORT (13)

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l 1 l l l l SUPPLEMENTAL REPORT EXPECTED (14 MONTH DAY YEAR

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ASSTR ACT ILomst te le00 specne o e, eneronomere'y tutteen song a nonce troeoritten kness (186 ON OCICBER 11, 1985, WITH UNIT ONE IN

'E 5 (COLD SHUIDOWN) AND UNIT 'IND IN MCDE 5 (COID SHUTDOWN) WHILE CDNDUCTING A WALKDOWN OF FIRE PRCffECTION SYSTENS FOR DRAWING VERIFICATION IT WAS DETERMINED THAT THE FIRE DAMPERS (IEEE/BDMP) SEPARATING FIRE ZONES 41 AND 42B (1-HV-SGMC-1) IN UNIT ONE AND FIRE ZONES 45 AND 46B IN UNIT

'I?D (2-HV-SGMC-1) WERE DESIGNED 'IO RELEASE UPCN THE ACIUATION OF THE CO2 SUPPRESSION SYSTEM PROTECTING ZONES 42B OR 46B RBwu.nVELY. IN THE EVENT OF AN ACTUATION OF THE CO2 SUPPRESSICN SYSTEMS PROTECTING FIRE ZONES 41 OR 45 'IEE RESPECTIVE FIRE DAMPERS WERE NOT DESIGNED 'IO HAVE CLOSED ALIDhTING 002 'IO FID OUT OF THE ZONE AND POSSIBL3 REDUCING THE CO2 CONCENTRATION 'IO BEIDW ITS DESIGN BASIS.

AN ENGINEERING EVALUATION INIO THIS DESIGN HAS DETEPMINED 'IHAT FOLIDWING A CO2 l

DISCHARGE IN FIRE ZCNES 41 OR 45 A CO2 CDNCENTRATION IN EXCESS OF 34 PERCENT WOULD l

BE MAINTAINED EUR OVER 6 MINUTES. 'IHIS CONCENTRATION hDUID HAVE BEEN SUFFICIENT 'IO l

EXTINGUISH ANY SURFACE FIRES AND 'IO CONTAIN ANY DEEP SEATED FIRES UNTIL THE FIRE BRIGADE ARRIVED. PRESENTLY THE FIRE DAMPERS IN QUESTION ARE BEING MAINTAINED CIOSED BY ADMINISTRATIVE CONTROL. AISO BECAUSE OF CHANGES IN VENTIIATIN REQUIREMWrS 'IHESE OPENINGS WILL BE CIOSED PERMANINILY.

'IEERE WERE NO ADVERSE CDNSEQUENCES FRCM THIS EVENT.

8511210541 851111 PDR ADOCK 05000315 S

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