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Letter Confirming a 07/19/1974 Conversation Concerning Discovery of HPCI High Steam Flow Isolation Switch DPIS 3-2352 to Be Out of Flex - Dresden Unit 3
	ML17252A516
Person / Time
Site:	Dresden
Issue date:	07/19/1974
From:	Stephenson B; Commonwealth Edison Co
To:	O'Leary J; US Atomic Energy Commission (AEC)
References
	Download: ML17252A516 (1)
	v • d • e

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03258 TOVE MORRIS IL 112 07-19 1137A CDT PMS J F O'LEARY DIRECTOR WUT-.

DIRECTORATE OF LICENSING' US ATOMI.C ENERGY COMISSION

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WASH DC 20 545 so-249

~BJECT DPR-25.DRESDEN NUCLEAR POWER STATION UNIT 3. THIS WILL

CONFIRM A CONVERSATION WITH F MAURA QF.YOUR OFFICE 1050 HOURS lliIS DATE CONCERNING HPCI HIGH STREAM FLO~ ICELATION SWITCH

~IS 3-2352 FOUND OUT OF FLEX. AS FriUND SET'POINt 6URING ROUTEIN~

~LIBRATION WAS 283 INCHES OF WATER WHICH IS GREAT THAN ALLWED

~TABLE 3.2.1. TF THE TECHNICAL SPECI~ATIONS. THE SWITCH WAS IMMEDIATELY RESET TO OPERATE AT 146* 5 INCHES OF WATER INCREASE

~IS 3-2353 WAS ALSO CHECKED AND FOUND\\ TO OPERATE WITH IN ITCHNICAL SPECIFICATION LIMITS* ADDITIONAL DETAILS ARE FORTH COMING*

IN _THE FORM OF A 10 DAY LETTER B B STPHENSON SUPERINTENDENT

~ESDEN NUCLEAR POWER STATION COMMONWEALTH NUCLEAR EDISON CO RR 1 MORRIS IL 60450 MINN 431P EDT+

USAEC HQS GTWN WU WSH 66*45

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ML17252A516