ML20084F061

Telecopy Ao:On 720203,while Conducting Biweekly Surveillance,Power Range High Flux Set Points Found to Be 110%.Caused by Negative Power Supply Voltage Drifting Out of Spec.Setpoints Realigned

ML20084F061
Person / Time
Site:	Ginna
Issue date:	02/03/1972
From:	Platt C ROCHESTER GAS & ELECTRIC CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20084F052	List: ML20084F049 ML20084F061
References
NUDOCS 8304200029
Download: ML20084F061 (2)

Text

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kele raiti 41gP EST FEB 3 72 PA205 MA141 M RHA099 ML PDF 1 EMRA ROCHESTER NY 31119A EST ,

JAh!ES P 0'REILLY DIRECTOR REGION 1 DIVISION OF COMPLIANCE

,_ USAEC 970 BROAD ST NEWARK NJER . ._

THIS IS TO CONFIRM MY CONVERSATION AT 0920 HOURS THIS DATE WITH WALTER BAUNACK OF YOUR OFFICE IN REGARDS TO AN ABNORMAL n OCCURENCE AT GINNA STATION. ,

AT 0135 HOURS ON FEBRUARY 31972 THE OPERATORS WERE CONDUCTING y Jg YtE BI-WEEKLY PT6 3 SURVEILLANCE TEST THE POWER RANGE HIGH ,

OE' FLUX TRIP SET POINTS ON NUCLEAR POUER N-41 VAS FOUND TO BE g h

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AT 110 PERCENT.

THE CHANNEL VAS CHECKED AND THE NEGATIVE POWER SUPPLY VOLTAGE h

mD DRIFTED OUT OF ITS SPECIFICATION. IT WAS REALIGNED TO VITHIN' '

SPECIFICATION AND RETESTED USING PROCEDURE PT6 3 IT WAS FOUND q m

fg 10 BE OPERATING N0ftMALLY 2 0178 v mam CHARLES E PLATT SUPERINTENDENT GINNA STATION ROCHESTER GAS l 8M Lopyh?ntPDR S

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