ML20085G601

Telecopy AO BFAO-734T:on 730808,refueling Zone Vacuum Increased to Approx 0.8 Inch.Caused by Static Pressure Control Modulating Dampers Failure.Fuel Handling Operations Immediately Suspenede & Region II Notified

ML20085G601
Person / Time
Site:	Browns Ferry
Issue date:	08/09/1973
From:	Green H TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20085G594	List: ML20085G601 ML20085G621
References
BFAO-734T, NUDOCS 8308290206
Download: ML20085G601 (2)

Text

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PEFERENCE BFAO-734I O AT APPCOXIMATELY 9 AM ON AUGUST 3 19 73 ',ilLE CO NDUCT IllG S"rVE IL A r10 E TESTS ON UNIT ONE TO DETEPi4INE T-iE CAPAB ILITY OF T'iE SECON7 Any 0 . -_-

CONTAINMENT T3 MAINTAlfl AI LEAST ONE QUA4TEo INCH 3F 'qTED "A c r " M $

AFTER f1031FICATIONS TO SECON9AC Y CONTAINMENT BOUNDA ( 100cS U --

TdE REFUELING ZONE VACULM INCPEASES TO APPP0XIPATFLf 0.3 INC'i m UATER SEE TECHNIC AL SPEC IFIC A TI0.1S TABLE 3.2.

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INVES TIG A TI J N 9EVEALE7 T.iAT T4E REFUELING ZONE STATIC PFESStPE 312:1 (Rs-se) p ,

CONTROL MODULA TING OA NPE RS H A 7 F A ILE D TO PE 970 ofd THEIo INTENDE7 '

s FUNCTION. 'iE t0 3UI. A TI NG DAMPEoS WERE ACTUATE 7 4T ONE NALF INCH WATE9 VACUUti THE IR RESPONSE TI!*E TO C:iANG ING UACifUM CON 7ITION3 -

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UAS TOO SLOW TO PREVENT C1.0SUC 0F tie IN SERIES IS01. AT ION D A FPE"S ..

SET AT 3/3 INCd WATER VACUUM. CLOSURE OF THE ISOLATION uAt'.eZS d -

ALLOVED VACUUM TO INCREASE A9ouE ONE HALF INCH WATED. Ft.tEL MAN 9tIqn ' 7-OPERATIONS WERE SUSPENDED PEN 7ING ESOLUTION OF T'{Is P00nt.Er. O -

REG I 31 TWO INSPECT 00 NO T IF IE 9 BY P lJNE AtJGUST 8 19 73 -

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DR Central Files Regulatory Stande.rds (3)

Directorate of Licensing (13)

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