ML20084T539

Telecopy Ro:On 721119,during Calibr of Main Steam Line Low Pressure Switches,All Four Pressure Switches Had Trip Settings Below Tech Spec Limits.Cause Not Stated.As Left Calibr Settings Changed

ML20084T539
Person / Time
Site:	Dresden
Issue date:	11/20/1972
From:	Worden W COMMONWEALTH EDISON CO.
To:	Giambusso A US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20084T542	List: ML20084T539 ML20084T545 ML20084T548
References
NUDOCS 8306230254
Download: ML20084T539 (1)

Text

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• ltIS WILL CQNFlxM A CONVEkd4TivN W I l ti dr< n DANCE OF YOUR OFFICE AT 1100 nuuRS Trils OAlE CCNCEhNING HEAClONS LOW PHESSURE SWITCHES r41 NU OUT'0F CALiddhATLON. UN 11/1v/7d WHILi UNIT 3 WAS SHUT s0WN.

A C ALi de. HAT I ON wA5 XADE ON MAIN S1dAA LINE LOW PRESSURE Sw! TCnES.

0;uLE 3.a.1 OF THr T ECrtNIC AL St<dC IFIC AT I ONS ST ATE inAT THE TRIP LEVEL SETTING ON TnESE SWITCHES SHOULO dd EQUAL TO OR GREATER TH AN 6 50 PSI G. ALL FOUR PRESSUHi SWITCnds riAD TRIP SETTINGS dELOW 650 PSlu. rsRESSURE SWITCnES 3-d61-30A AND 30H nAD SETTING F e47 AND 64e PSIb. PHESSURE SWITCHES 3-a61-30C AND 3 f' O rA D SETTINGS OF 649 AND #48 PSIb. IN ORDER-1O ELIMINAT6 T ai I S PROBLEM IN lite FUTUHi THE "AS LEFT" CALluinATION SETTING GN Trt ES E SV11CnEd' n AS uddN CH ANuio Fh0M e 3d PLUS 0H AINUS RSIG TO A6, p ,

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