ML20084S078

Telecopy Ro:On 740726,seat Matl of Air Operated Primary Containment Isolation Valve AO3-1601-22 Failed.Cause Not Stated.Preparations Underway to Reconfirm Leak Tightness of Other Valves Which Provide Pressure Boundary

ML20084S078
Person / Time
Site:	Dresden
Issue date:	07/26/1974
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084S054	List: ML20084S051 ML20084S076 ML20084S078
References
NUDOCS 8306160140
Download: ML20084S078 (2)

Text

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ICS IPMVEIC MVN Nbr. L k. .-~ _ , f J/)Ci" ~ g g,f ( 0324? TDVE MORPIS IL 10907DUt402.P_CDf,) N un. i.y PMS JAMES G KEPPLER REG INAL D hkto de 1-[r , er gy) ' ( n , D IRECTORATE OF REG ULATORY O PEDH Tr"' CM Tn *: X U'YX 'fF ATOMIC ENEPGY - g COMM 799 ROOSEVELT RD , GLEN ELLYN IL 60137

  , ~p g        SUBJECT DPR-25 DRESDEN NUCLEAR POWER STATION UNIT 3.
      $a.       THIS VILL CONFIRM A CONVERSATION WITH F. MAURA 0F YOUR OFFICE AT 1445 HOURS THIS DATE CONSERNING A FAILURE OF THE SEAT ab        M ATER I AL OF A IR OPPER ATED ISCL ATION VALVE A0 1601-21. THIS l

Y o8 V ALVE WHICH IS IN SEP1ES f WITH THE PREVIOUSLY REPORTED i o A0-3-160122 VALVE WA3 DISCOVERED TO HAVE SEAT DEGREDATION BY ' d(

     -                                                    ,                                                                                                                  ,' v t g ' LOCAL LEAK R ATE TESTING AT 2300 HOURS JULY 26, 1974. A REACTOR i
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s.tn SHUTDOWN WAS COMMENCED AND THE REACTOR WAS IN COLD SHUTDOWN AT 0900 JULY 27 1074. ADDITIONAL DETAILS IN THE F0DM OF A TEN TF-1201 (mus)}}