ML20084L744

Telecopy Ro:On 740726,during Visual Insp,Excessive Leakage Confirmed on Reactor Breaker to Torus Vacuum Breaker 2-1601-31A.Caused by Cracked Rubber Seat.Surveillance of Breaker Valve Initiated

ML20084L744
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
ML20084L740	List: ML20084L739 ML20084L741 ML20084L744 ML20084L755
References
NUDOCS 8305230679
Download: ML20084L744 (2)

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VEE 467(1846)(1-044725C207)PD 07/26/74 1844 i ICS IPNVEIC MVN 03275 TDVE MORRIS IL 162 07 6 430P CDT i PMS PR JAMES G XEPPLER REGIONA DIRECTOR ^

j DIRECTORATE OF REGULATORY OPER ATIOgSLheRA S (OTHEP, THAN EONEY ttRDERS '

REGION 3 ,,,.,3 catcgtive,yrea.uaee. _ ,(ysa-Ac b WUX EENT SE;TICN ""* " ' ' OTl '

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SUBJECT DPR-19 DRESDEN NUCLEAR POWER STATION UNIT 2.

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of THIS WILL CONFIRM THE CONVERSATION WITH F MAURA 0F YOUR.([l OFFICE g

< AT 1630 HOURS THIS DATE CONCERNING EXCESSIVE LEAXAGE P AST DRY WELL ' '

SE e o.03 PURGE INLET VALVE A0-2-1601-22. VISUAL INSPECTION REVEALD CR ACKED L,E< v i RUBBER SEAT. LOCAL LEAX RATE XEPT CONFIRMED EXCESSIVE LEAXAGE.

,,,,,,gTI ATED REQUIRED SURVEILLA NCE ON A0-2-1601 -21. INITI ATE WORK R E-(

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QUEST AT 2l00 24 JULY 1974 ROUTINE SURVEILLANCE DISCOVERED DRIFT PS2389B WHICH ISOLATE HIGH PRESSURE. HPCI SYSTEM WOULD HAVE BEEN 5 AVAILABLE ON DECREASING PRESSURE TO THE LOW 90 PSI REACTOR L~l PRESSURE BUT ON STARTUP IT WOULD NOT HAVE BEEN AVAILABLE UNTIL y y 96 PFI WHICH EXCEEDS TECH SPEC LIMIT OF 90 PFI. f;

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EXCESSIVE LEAXAGE.PST A0-2-1601-31 A TORUS TO RX BUILDING VACUUM BREAXER DISCOVERED AT 1400 26 JULY 1974 INITIATED SURVEILLANCE OF 1601-20A VALVE

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B B STEPHENSON SUPERINTENDENT DRESDEN NUCLEAR POWER STATION t

7 COMMONWEALTH EDISON CO r RR1 s MORRIS IL 60450 JUL 3 1 1974 C ar-noiU38 -j

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