05000315/LER-1985-034, :on 850726,inner & Outer 612-ft Elevation Airlock Doors Opened Simultaneously.Caused by Door Malfunction.Doors Immediately Closed,Restoring Containment Integrity.Door Latching Mechanism Restored to Status

:on 850726,inner & Outer 612-ft Elevation Airlock Doors Opened Simultaneously.Caused by Door Malfunction.Doors Immediately Closed,Restoring Containment Integrity.Door Latching Mechanism Restored to Status

ML20137F896
Person / Time
Site:	Cook
Issue date:	08/23/1985
From:	Alland J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML20137F864	List: 05000315/LER-1985-033, :on 850725,during Insp of Containment,Senior Reactor Operator Noticed Condensation Backed Up Due to Open Floor Drain Valve.Caused by Employee Error.Valve Immediately Closed 05000315/LER-1985-034, :on 850726,inner & Outer 612-ft Elevation Airlock Doors Opened Simultaneously.Caused by Door Malfunction.Doors Immediately Closed,Restoring Containment Integrity.Door Latching Mechanism Restored to Status ML20137F861
References
LER-85-034, LER-85-34, NUDOCS 8508270120
Download: ML20137F896 (1)

LER-1985-034, on 850726,inner & Outer 612-ft Elevation Airlock Doors Opened Simultaneously.Caused by Door Malfunction.Doors Immediately Closed,Restoring Containment Integrity.Door Latching Mechanism Restored to Status

Event date:
Report date:
3151985034R00 - NRC Website

text

e mac Fwe 30s U.S. h0CLELA KEGULt. TORY COMMLE8804 APdtOVEO OMB ho 3150-0104 LICENSEE EVENT REPORT (LER)

FACILITV NAME (1)

DOCKET NUMSER (2J PAGEIJA D. C. COOK NUCLEAR PLANT - UNIT 1 o ls l o lo l o l 3l1 l5 1 loFl 0l 1 TITLE 444 BREACH OF CONTAINMENT INTEGRITY EVENT DATE (El LER NUMBER 18)

REPORT DATE (7)

OTHER FACIL8 TIES INVOLVED (89 MONTH DAY YEAR YEAR II Ab y-MONTH DAY YEAR 7 Acstarv nAMas DOCKET NUMBERist 0 15101010 1 I l 0l7 2l6 8 5 8l 5 0l 3l 4 0l0 0l8 2l3 8l 5 0 p5 1 0 10 1 0 i l I

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THIS REPORT t$ BUSMITTED PURSUANT TO THE REQU)REMENTS OF 19 CPR I: (Chore one er met ef N fonswepJ nt)

MODE (9) 6 20.402M 30.400(el M.7hH2 Hist

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LICENSEE CONTACT POR THIS LER (12)

NAME TELEPMONE NUMBER AREA COOE J. D. ALLARD - MAINTENANCE SUPERINTENDENT 6;1,6 4g 6,5 g ;5g9; 0;1 COMPLETE ONE LINE FOR EACH COMPONENT FAILURE DESCRf8EO IN TMit REPORT (13b 0*

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ON EY 26, 1485 AT APPROXIMATELY 1100 HOURS L!!111 DIE UNIT IN MODE 6 (REFUELING), AN AIR: CK DOOR MALFUNCTION ALLOWED BOTH THE IWR AND OUTER 612 FOOT ELEVATION AIRLOCK Dm-TO Bl: OPENED SIMULTANEOUSLY. THE AIRI OCK DOOR OPERATOR, WHO WAS IN THE PROCESS IOSlb FITE OUTER DOOR WHEN '~iiE INNER DOOR WAS NENED, ACTED IMMEDIATELY AND CLOSED TTER AIRLOCK DOOR WHICH RE.5TORED CONTAINMENT INTEGRITY.

SINCE CONTAINMENT U. l l hM ITY WAS ONLY VIOLATED FOR A MATTER OF SECONDS, THE ACTIONS REQUIRED BY TECHNICAL

' GN.':lFICATION 3.9.4 WERE NOT APPLICABLE. UNDER AN EMERGENCY JOB ORDER THE AIRLOCK DOOR

' A lnt tNG MECHANISM WAS RESTORED TO AN OPERABLE STATUS AT 1600 HOURS.

CONSIDERING THE SHORT DURATION OF THE CONTAINMENT INTEGRITY VIOLATION, ALONG WITH THE IMMEDIATE ACTIONS TAKEN BY THE AIRLOCK DOOR OPERATOR, IT IS CONCLUDED THAT THERE WERE NO ADVERSE SAFETY CONSEQUENCES DUE TO THIS EVENT.

PREVIOUS OCCURRENCES OF A SIMILAR EVENT INCLUDE: 50-315/81-031, 50-315/79-004.

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