ML20084T753

Telecopy Ro:On 720922,during Three Month Calibr Test on High Flow Isolation Switches,All Four Switches Set Points Found Greater than Tech Spec Limit.Switches Reset.As Left Settings on Switches Will Be Changed to Lower Value

ML20084T753
Person / Time
Site:	Dresden
Issue date:	09/25/1972
From:	Worden W COMMONWEALTH EDISON CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084T730	List: ML20084T738 ML20084T743 ML20084T753
References
NUDOCS 8306240089
Download: ML20084T753 (1)

Text

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BOYCE GRIER, DIRECTOR DIVISION Or COMPLIANCE i REGION 3 U.S. ATOMIC ENERGY COMMISSION 7';9 F003 EVE! T ROAD GLEN El. LYN !LLINOIS E0137 SUBJECT DPR-?S DRESDEN NU LEAR POV.ER STATION UNIT 3 THI S UILL C0f tF IRi' THE CONVERSAT ION V. l TH H. DANCE OF YOUR CFFICE AT 0915 hCURS THIS EATE CONCERN!.NG HIGH FLOL EV!! TC iES ON THE ISOLATION CC': DENSER EFING OUT OF CALIBRATION. ON 9 22 72 A FOUTINE THREE MONTH CALIBRATION LAS PEFFORMED ON THE HIGH FLOW ISOLATION SWITCHES. ALL FCUR SWITCHES SET POINTS ViERE FOUfJD 3REATER THAN THE LIMIT IN TABLE 3.2.1. OF ThE TECHNICAL SPECIFICATIONS.

THE H I GH STE AM FLOW 55.'I TCHES , EP I S :-13 50 AEB, WERE FCUND JET AT 4d;.5 AND 435.5 INCHES OF V ATER. THE LINIT k )

WU 12011R 5-691 IN TABLE 3.2.1. CORRESPONDS TO 425 INCHES OF WATEF THE HICH CO DENSATE FLOW SWITCHES, CPIE :-1349 ALB, WERE FOLND SET AT 33.2 AND 33.5 lNCHES CF WATER. THE LIMIT IN TABL 3.2.1 IN 32 INCHES OF WATER.

Rll TCHES DPI S 3-1350 A&B '!ERE RE3t:T TO '16.5 AND 417.5 g INCHES OF i;ATEF. SWITCHES DPlS 3-1349 AEI WERE RESET nirva 29.0 AND 30.1 INCHES OF ".ATER. PRESENT PLAT' Af.E TO

$8 . T) CHANGE THE AS LEFT SETTINGS CN THESE EWITCHES TO A LOWER R@ VALUE / ~ THE NEXT CALiBRAT10N. ,,,.,

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