ML20084M385

Telecopy AO 3-72-8:on 721216,battery Charger Input Transformer 3 Overheated & Small Fire Occurred.Investigation in Progress

ML20084M385
Person / Time
Site:	Turkey Point
Issue date:	12/17/1972
From:	Schmidt A FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20084M372	List: ML20084M371 ML20084M376 ML20084M385
References
AO-3-72-8, NUDOCS 8306020132
Download: ML20084M385 (1)

Text

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847A EST DEC 17 72 AC035 Q TELTEX ATLA 00l(0631)

E MZAB34l2306)(2-041215E551)PD 12/16/72 2305 ICS IPMBNGZ CSP '

ZCEC 3052472557 NL TDBN MIAMI FL 12-16 Il05P EST PMS DIRECTOR REGION 2 DIRECT 0 ATE OF, REGULATORY OPERATION '

US ATOMIC ENERGY COMMISSION SUITE 21N 230 PEACHTREE ST NORTHWEST ATLANTA GA [. Q f . hp (Olc - 4/'O S, , '

Qw) j,bl.]J / C' FROM FLORIDA POWER AND LIGHT COMPANY TURXEY POINT

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PLANT MI AMI FL FLORIDA POWER AND LIGHT COMPANY TURXEY POINT REPORTS ABNORMAL OC CU RE N C E # 3 3 ---

AT 757AM, DEC 16, 1972, WHILE AT COLD SHUTDOWN, THE #3 BATTERY CHARGERINPUT'TRANSFORMEROVERHEATEDANDASMALLFIREOCCURED IN THE TRANSFORMER WINDING INSULATION APPARENTLY AS A RESULT _ , y-t f 0F A SHORT CIRCUIT IN WINDING. THE #3 BATTERY CHARGER WAS ISOLATED, 3 THE FIRE EXTINGUISHED AND THE #3S BATTERY CHARGER WAS PLACED IN SERVICE.

THERE WERE NO SAFETY IMPLICATIONS UNDER THE CIRCUMSTANCES OF THIS OCCURENCE IN THAT THE r 1RE , WHICH WAS READILY EXTINGUISHED, WAS LIMITED TO THE IMMEDI ATE AREA 0F THE TRANSFORMER INSULATION AND THE REDUNDANI BATTERY CHARGER WAS OPERABLE. C HOWEVER, THERE ARE INDICATIONS THAT THE #3S AND #4 BATTERY CHARGER IMPUT TRANSFORMERS ARE OPERATING AT HIGHER THAN NORMAL TEMPERATURES -

WHICH IMPLIES THE PROBLEM MAY BE GENERIC IN NATURE.

A THOROUGH INVESTIGATION IS IN PROGRESS v A D SCHMIDYDIRECTOR OF POWER RESOURCES

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