ML20084H818

Telecopy AO BFAO-7425T:on 740505,HPCI Sys Failed to Deliver Water to Reactor When Initiated on Low Water Level Following Reactor Scram.Apparently Caused by Overspeed Trip.Sys Restarted Manually & Performed Satisfactorily

ML20084H818
Person / Time
Site:	Browns Ferry
Issue date:	05/06/1974
From:	Green H TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20084H813	List: ML20084H811 ML20084H818
References
AO-BFAO-7425T, NUDOCS 8305050433
Download: ML20084H818 (1)

Text

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E US ATOMIC ENERGY COMMISSION REGION 2 O

( DIRECTORATE OF REGULATORY OPERATIONS 230 PEACH TREE ST NORTHWEST ATLANTA GA 30303 2

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f SUBJECT BFA0=7025T AT 843 AM MAY 5 1974 THE HPCI SYSTEM FAILED Q -

n TO DELIVER WATER TO THE REACTOR WHEN INITIATED ON LOW WATER r LEVEL FOLLOWING REACTOR SCRAM OVERSPEED TRIP WAS APPARENT CAUSE 1 IT WAS IMMEDIATELY RESTARTED MANUALLY AND PERFORMED SATISFACTORILY O --

E DURING THE MANUAL SHUTDOWN CYCLE THE INVERTER POWER SUPPLY FUSE E BLEW. IT WAS REPLACED AND THE HPCI DECLARED OPERABLE AT 1230 -

i PH ON THE SAME DATE. INVESTIGATION OF BOTH FAILURES IS CONTINUING H J GREEN BROWNS FERRY NUCLEAR PLANT O "_

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