ML20085G274

AO BFAO-7325T:on 731005,HPCI Sys Failed.Caused by Leaking Ruptured Diaphragm.Surveillance Test Initiated Immediately But RCIC Turbine Governor Failed.Rcic Governor Adjusted & Tested

ML20085G274
Person / Time
Site:	Browns Ferry, 05000258
Issue date:	10/05/1973
From:	Green H TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20085G265	List: ML20085G263 ML20085G274
References
BFAO-7325T, NUDOCS 8308240751
Download: ML20085G274 (1)

Text

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REGION 2 DIRECTORATE OF REGULATORY OPERATIONS 230 PEACHTREE ST NORTHWEST ATLANTA GA 30303 )

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BFAO-7325T AT 545AM ON OCTOBER 5 1973 DURING PERFORMANCE TEST OF THE HPCI SYSTEM THE HPCI FAILED TO OPERATE PROPERLY. THE HPCI SYSTEM ISOLATED AUTOMATICALLY DUE TO A LEAKING EXHAUST 1 RUPTURED DIAPHRAM. THE REACTOR WAS OPERATING AT APPROXIMATELY 5 PERCENT POWER AT 1000 PSIG PRESSURE. SURVEILLANCE TEST OF REDUNDANT CORE COOLING SYSTEM VAS BEGUN IMMEDIATELY. DURING )

SURVEILLANCE TEST OF THE RCIC SYSTEM AT 745AM THE RUIC TURBINE GOVERNOR t%LFUNCTIONED CAUSING OVERSPEED TRIP. REACTOR SHUTDOWN VAS STARTED IMMEDIATELY. AFTER SLIGitT RCIC GOVERNOR ADJUSTMENT  ;

THE RCIC VAS RETESTED AND DECLARED OPERABLE AND REACTOR SHUTDOWN VAS TERMINATED INVESTIGATION OF THE HPCI RUPTURED DIAPHRAM DISCONTINU ING  ;)

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