05000327/LER-1981-011-03, /03L-0:on 810130,vital Inverter & Vital Instrument Power Board 1-I Declared Inoperative.Caused by Severance of Conduit & Cable B30I Supplying Power to Inverter.Cable & Conduit Replaced

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/03L-0:on 810130,vital Inverter & Vital Instrument Power Board 1-I Declared Inoperative.Caused by Severance of Conduit & Cable B30I Supplying Power to Inverter.Cable & Conduit Replaced
ML20003E869
Person / Time
Site: Sequoyah Tennessee Valley Authority icon.png
Issue date: 04/10/1981
From: Maddox S, Mcgriff J
TENNESSEE VALLEY AUTHORITY
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003E867 List:
References
LER-81-011-03L-02, LER-81-11-3L-2, NUDOCS 8104170411
Download: ML20003E869 (1)


LER-1981-011, /03L-0:on 810130,vital Inverter & Vital Instrument Power Board 1-I Declared Inoperative.Caused by Severance of Conduit & Cable B30I Supplying Power to Inverter.Cable & Conduit Replaced
Event date:
Report date:
3271981011R03 - NRC Website

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' EVCfor DESCntPfiON AND PROS ASLE CONSECVENCES h gl At 1250 (c) on 1/30/81, cable B30I was cut while core drilling per Workplan 89R1.

ml This cable supplies' battery pcwor to vital inverter'l-I. This rendered vital instrument ITTTl I power board 1 i inoperative. There was no effect on public health or* safety. Previots fo,3j [ occurrences on all'eight vital instrument power boards - 15. The inverter and'instru-gl ment tower board 1-1 were declared operabic at 1740 (c) on 1/30/81, within the Lt0 [o jij l action statement time limit.

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i o l The' conduit and cable (B30T) sunnivint: power to vital inverter'l 1 was cut'.

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ihe exact location of this g,i,jl cmbedded conduit was not specified on the workplan drawings since it was field routed i,;3; l conduit.

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