05000315/LER-1985-056, :on 850530,defective Fire Seal Discovered in Control Room Cable Vault Ceiling.Cause Undetermined. Continuous Fire Watch Coverage Established & Seal Repaired & Declared Operable

:on 850530,defective Fire Seal Discovered in Control Room Cable Vault Ceiling.Cause Undetermined. Continuous Fire Watch Coverage Established & Seal Repaired & Declared Operable

ML20137E722
Person / Time
Site:	Cook
Issue date:	11/21/1985
From:	Stietzel J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML20137E660	List: 05000315/LER-1984-036, :on 840717,personnel Access Hatch Remained Open for 1 H & 20 Minutes.Caused by Personnel Negligence. Personnel Made Aware of Tech Spec 3.6.5.5 & Hatch Labeled W/Info Re Tech Spec Requirements 05000315/LER-1985-055, :on 851025,lower Containment Airborne Monitor Particulate Channel Train a High Alarmed,Resulting in ESF Actuation Signal.High Alarm & Alert Alarm Setpoint Readjusted 05000315/LER-1985-056, :on 850530,defective Fire Seal Discovered in Control Room Cable Vault Ceiling.Cause Undetermined. Continuous Fire Watch Coverage Established & Seal Repaired & Declared Operable ML20137E655
References
LER-85-056, LER-85-56, NUDOCS 8511270299
Download: ML20137E722 (1)

LER-1985-056, on 850530,defective Fire Seal Discovered in Control Room Cable Vault Ceiling.Cause Undetermined. Continuous Fire Watch Coverage Established & Seal Repaired & Declared Operable

Event date:
Report date:
3151985056R00 - NRC Website

text

NRC Form 3e0 U S NUCLE A A K E LULt. TORT COndMPSSION G 83l APPROvt0 OMS NC 31to-ct04

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LICENSEE EVENT REPORT (LER)

F ACILITV NAME m DOCKET NUMGER 421 PAGE ty, D.C. COOK PLANT, UNIT 1 0 ] 5 I o Io l 0131 115 1 l0Fl 011 TITLE tes INOPERABLE FIRE BARRIER EVENT DATE tll LE R NUMBE R 161 REPORT DATE 47)

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see.,, -.e.mei m MAY 30,1985, AT 0800 HOUPS WITH UNIT 1 IN ITDE 6 AND NO MEL IN THE CORE, A TECHNICIAN DISCOVERED A Deu;nVE FIRE SEAL (TEF'F/ SEAL) IN TIE UNIT 1 CDNITOL ROCM CABLE VAULT CEILING. THIS CONSTI'IUTED AN INOPERABLE FIRE BARRIER PER TECHNICAL SPECIFICATICN 3.7.10.

THIS EVD7f NAS DEJrEPMINED 'IO BE REPORTABLE ON OC'IOBER 22, 1985, KTIILE INVESTIGATING CONCERNS RAISED DURING TIE ASSOCIATED CONDITION REPCRP CWSEXX7f REVIEW.

CONTINUOUS FIRE WA'IGI COVERAGE WAS ESTABLISIED AT 0820 HOURS, MAY 30, 1985. THE SEAL WAS REPAIRED M'D DECIARED OPERABLE ON MAY 30, 1985, AT 1557 HOURS.

'IHE DEFECT CONSISTED OF AN UNSEALED HOLE OF 3 INCHES BY 4 INCHES BEHIND A CCNTROL ROOM PANEL. 'IHIS PDETRATION IS ON THE 18 MONTH SURVEILIANCE PROGRAM NO WAS CH1Luv LAST ON APRIL 18, 1985. THIS PDCIPATION WAS SATISFACIORY AT THAT TIME.

IT COUID NOT BE DETERMINED kHEN OR kHO RENOVED THIS SEAL.

A SAFETY EVALUATION REVFALED THAT: THE UNIT 1 CCNTROL ROOM VDTTIIATION SYSTEM (CRVS) NOUID HAVE MAINIAINED A POSITIVE PRESSURE IN TIE UNIT 1 CDf7fROL ROCN; AND THE UNIT 2 CRVS NOULD HAVE OPERATED AT A IDER POSITIVE PRESSURE, BUT CAPABLE OF MEETTING OPEPABILITY REQUIRDENTS.

SINCE THE OPEN PENETTRATION WAS LOCATED IN TIE CEILING OF TIE PROTECTED AREA AND WOUID HAVE A MINIMAL urrLT ON 'IHE CO OR HAIDN CONCH 7fRATION WI'IRIN 'IHE AREA, IT IS CCNCLUDED 'IHAT THERE WAS NO APPREC DEGRADATICN OF THE CCNTROL ROOM CABLE VAULT FIRE SUPPRESSION SYSTEM.

PREVIOUS SIMILAR EVENTS INCUJDE: 315/85-24 AND 18, 316/85-6.

8511270299 B51121

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