ML17252A527

Letter Confirming a 05/24/1974 Conversation Concerning the Discovery of a Set Point Drift of L.I.T.S. 3-263-72A Beyond the Technical Specification - Dresden Unit 3

ML17252A527
Person / Time
Site:	Dresden
Issue date:	07/05/1974
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler US Atomic Energy Commission (AEC)
References
Download: ML17252A527 (2)

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UNITED STATES ATOMIC ENERGY COMMISSION DIRECTORATE OF REGULATORY OPERATIONS REGION Ill

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799 ROOSEVELT ROAD

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A. RO Inspection Report N o . - - - - - - - - - - - -

Transmittal Date Distribution: Distribution:

RO Chief, FS&EB RO Chief, FS&EB RO:HQ (5) RO:HQ (4)

DR Centrar Files L:D/D for Fuels &'Materials Regulatory Standards (3) DR Central Files Licensing (13) RO Files RO Files B. RO Inquiry Report No.

Transmittal Date Distribution: Distribution:

RO Chief, FS&EB RO Chief, FS&EB RO:HQ (5) RO:HQ DR Central Files DR Central Files

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Regulatory Standards (3) RO Files Licensing (13)

RO Files C. Incident Notification From: Commonwealth Edison Co. Docket No. 50-249 (Licensee & Docke,t No. (or License No.)

Transmittal Date  : . July 5, 1974 Distribution: Distribution:

RO Chief, FS&EB .RO Chief, FS&EB RO:HQ (4) RO:HQ (4)

Licensing (4) L:D/D for Fuels & Materials DR Central Files DR Central Files RO Files RO Files

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c 0~254 ~DVE MORRIS IL 124 os-_24 201P. CDT . -~ ~*~ ...

P"1:; MR uAMES G KEPPLER '. TELEGRAMS (OTHER THAN **o. ~SS-~ (r ~a .

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DlR-CTOR I s PHYSICAL

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DIRECIOR~TE OF REGULATORY ~mf¥6\~0tfEGION 3 WUX"ft~'.fL:;f'.E g;_CTION Y.2. ~ -;:J~ (.~

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?!~:"..'.~~~~dol1vor ~dica'e c .GLEN ELLYN. IL 60137 *.

S.UBJE CT DPR-2 5 DRESDEN NUCLEAR POWER ST AT lON~:-7.'7'l;;:T-:T::-:H-:::R:-::E:-;:E-.-.---------.:1}

DA or BY) ,

THIS WILL CONFIRM A CONVERSATION WII~-F MAURA OF YOUR OFFICE

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AT -1345 HOURST THIS DATE CONCERNiNG THE DISCOVERY DUR ING ***

• (*.*.*.* v-1201 ROUTINE ~UARIERLY CALIBRATION CKECKS OF A SET POINT DRIFT OF L.I .T .s. 3-263-72A BEYOND. THE *PERMISSABLE VALVE GIVEN IN TABLE

• 3,2.2 OF THE TECHNICAL (R5-81r

• SPECIFICATION *. THIS SWITCH WHICH

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• -:c*:*:.-,* ._:_IS THE SO CALLED .2/3 CORE COvERAGE INTERLOCKS _f_0.L99NI_A)_NMENI COOLING

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• w~~ FOUND TO OPERATE AT 259 . .

INCHES OF WATER THE PREMISSABLE SET POINT OF'257 INCHES OF WATER DECREASING. THE DECREASING WHICH .IS ABOVE

• c SWITCH ~AS RESET TO OPEfiATE AT 254.5 INCHES OF WATER. ADDITIONAL DETAILS WILL BE. FORTHCOMING IN THE. FORM . OF A TEN DAY LETTER IN ACCOR*. .

c DANCE WITH SECTIONS 6.6.J3.l~A Of THE TECHNICAL SPECIFICATIONS.

BB *STEPHENSON SUPERINTENDENT :, *

• c DRESDEN NUCLEAR POWER STATION COMMONWELATH EDISON CO

• RR 1 MORRIS IL 60450

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c. &F-12ot (RM9)

MAY 3 () 1974

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