05000315/LER-1979-017-03, /03L-0 on 790312:spent Fuel Pit Exhaust Ventilation Unit Flow Failed to Meet Acceptance Criteria. Caused by Slight Closing of Intake Grills Due to Sys Vibration.Grill Damper Linkage Securely Fastened

/03L-0 on 790312:spent Fuel Pit Exhaust Ventilation Unit Flow Failed to Meet Acceptance Criteria. Caused by Slight Closing of Intake Grills Due to Sys Vibration.Grill Damper Linkage Securely Fastened

ML17317B070
Person / Time
Site:	Cook
Issue date:	04/03/1979
From:	Beilman T INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17317B068	List: 05000315/LER-1979-016-03, /03L-0 on 790304:two Manual Containment Isolation Valves Were Inadvertantly Left Open Following Routine Sample of Instrument Room.Caused by Personnel Oversight.Both Valves Were Returned to Their Normally Closed Positions 05000315/LER-1979-017-03, /03L-0 on 790312:spent Fuel Pit Exhaust Ventilation Unit Flow Failed to Meet Acceptance Criteria. Caused by Slight Closing of Intake Grills Due to Sys Vibration.Grill Damper Linkage Securely Fastened ML17317B067
References
LER-79-017-03L, LER-79-17-3L, NUDOCS 7904090190
Download: ML17317B070 (2)

LER-1979-017, /03L-0 on 790312:spent Fuel Pit Exhaust Ventilation Unit Flow Failed to Meet Acceptance Criteria. Caused by Slight Closing of Intake Grills Due to Sys Vibration.Grill Damper Linkage Securely Fastened

Event date:
Report date:
3151979017R03 - NRC Website

text

U. S. NUCLEAR REGULATORY COMMISSION NRC FORM 366 LICENSEE EVENT REPOR r+

CONTROL BLOCK:

Qi (PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

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LICENSEE CODE 14 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T

~oi REPoRT ~LQB 0

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9 0 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES ~10 DURING A ROUTINE SURVEILLANCE TEST IT WAS DISCOVERED THAT THE SPENT FUEL PIT EXHAUST VENTILATION UNIT FLOW FAILED TO MEET THE ACCEPTANCE CRITERIA IDENTIFIED IN T.S. 4.9.12

~OB

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8 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LERiRP EY+NT+EAR REPORT NO.

CODE TYPE NO.

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21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDQ PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER

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Qzs 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS &27 THROUGH INVESTIGATION THE CAUSE LNS DETERMINED TO BE THE UNIT'S INTAKE GRILLS WHICH APPEARED TO HAVE CLOSED SLIGHTLY DUE TO SYSTEM VIBRATION.

THE GRILLS WERE REOPENED AND THE TEST WAS PERFORMED WITH SATISFACTORY RESULTS.

TO PREVENT MOVEMENT.

4 80 7

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FACILITY STATUS NP POWER OTHER STATUS Q 5

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29 NA METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32

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10 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION +39 7 ~00 0

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11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTION 41 3

~00 0

Q43 NA 7

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11 12 LOSS OF OR DAMAGETo FACILITY 43 TYPE

DESCRIPTION

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10 PUBLICITY ISSUED

DESCRIPTION

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10 80 NA 80 44 45 80 80 80 NRC USE ONLY o

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0 68 69 616-465-5901 T.

P.. Bei1man NAME OF PREPARER RECURRENCE, THE GRILL DAMPER LINKAGE WAS SECURELY FASTENED TO PROHIBIT INADVERTANT 3

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