ML17252A984
| ML17252A984 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/23/1973 |
| From: | Worden W Commonwealth Edison Co |
| To: | Anthony Giambusso US Atomic Energy Commission (AEC) |
| References | |
| Download: ML17252A984 (1) | |
Text
R B TWX 90f USAEC HQS GTWN WU WSH 50-249 TLXA195 WAD159C171~)(1-023762Cll3)PD 04/23/73 1711
!CS IPMVEIA MVN 01185 tDVE MORRIS ILL 161. 04-23 344P CST PMS MR A GIAMBUSSO, DEPUTY DIRECTOR FOR REACTOR PROJECT DIRECTORATE OF LICENSING,U S ATOMIC ENERGY COMMISSION.
WUX-WASH DC 20545 SUBJECT DPR-25 DRESDEN NUCLEAR POW~R STATION UNIT 3.
THIS WILL CONFIRM A CONVERSATJO~ WITH MR HUGH DANCE OF YODR OFFICE AT 1300 ~OURS THIS DATE CONCERNI~G A LOSS OF SECONDARY CONTAINMENT INTEGRITY FOR A PERIOD OF APPROXIMATELY 6 HOURS~
ON APRIL 19, 1973 AT APPROXIMATELY 1600 HOURS UNir 3' MAIN STEAM ISOLATION VALVE CMS IV) 3-203-28 W,AS OPE NED FOR INSPECT I ON OF VAL VE I NT ER NA L _S
- S I N CE T HE U N I T 3 T UR i;H NE.ST,0 PP ED VAL \\JES t*J ERE AL S 0 DISASSEMBLED AT THE TIME, A FLOW PASS EXISTED FROM THE TURBINE BUILDING tHROUGH STEAM LINES 3-30018-24 INCH AND THE DISA~SEMBLED 28 MSIV, INTO THE UNIT 3 MAIN'STEAM LINE TUNNEL WHICH IS A PART OF
~~CONDARY CONTAINMENT.
THE THIS CONDITION EXISTED UNTIL APPROXIMATELY 2200 HOURS ON APRIL 19, 19 73 WHEN A BLIND FLANGE WAS CONTAINMENT INTEGRITY.
CHANGE WILL BE ISSUE TO REOCCUR'*! NG INSTALLED ON 28 MSIV RESTORfNG SECONDARY.
A MAINTANENCE PROCEDURE PREVENT THIS TYPE OF INCIDENT FROM W P WORDEN SUPERINTE~DENT DRESDEN NUCLEA POWER STATION COMMONWEALTH EDISON COMPANY ROUTE 1 MORRIS ILLINOIS 632P 04-3-73 USAEC. HQS GTWN 2671-
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