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 B Commonwealth Edison Co
To:	Keppler J G US Atomic Energy Commission (AEC)
References
Download: ML17252A527 (2)

Text

-.-*.; .. : --. ---'** *., (, ' . ¥-' *-l ,._ UNITED STATES ATOMIC ENERGY COMMISSION DIRECTORATE OF REGULATORY OPERATIONS REGION Ill 799 ROOSEVELT ROAD ____ . 60137 * ------*-A. RO Inspection Report No.------------Transmittal Date Distribution: RO Chief, FS&EB RO:HQ (5) DR Centrar Files Regulatory Standards (3) Licensing (13) RO Files B. RO Inquiry Report No. Transmittal Date Distribution: RO Chief, FS&EB RO:HQ (5) DR Central Files Regulatory Standards (3) Licensing (13) RO Files Distribution: RO Chief, FS&EB RO:HQ (4) L:D/D for Fuels &'Materials DR Central Files RO Files Distribution: RO Chief, FS&EB RO:HQ DR Central Files RO Files C. Incident Notification From: Commonwealth Edison Co. Docket No. 50-249 (Licensee & Docke,t No. (or License No.) Transmittal Date Distribution: RO Chief, FS&EB RO:HQ (4) Licensing (4) DR Central Files RO Files : . July 5, 1974 Distribution: .RO Chief, FS&EB RO:HQ (4) L:D/D for Fuels & Materials DR Central Files RO Files l :it. I ;:-::-,,

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• _____ _ "-_ _ ---\97-'1mr12r1 _6:_ f.? ------------c c ( .*.C c (: *:.*: -----,z; VEA317C 1917> C 05/24/74 1915 * ** lCS. IPMVEIB MVN JA/ t. MORRIS IL 124 os-_24 201P. CDT . ... P"1:; MR uAMES G KEPPLER '. TELEGRAMS (OTHER THAN **o. (r . DlR-CTOR I

• m NEY ORDERS) w "' J:. s PHYSICAL DELrvr.-r. y re . t '" 1b . ...1\ ques ;,w Ld_ (YES-AGENT. NO-ADDRESSEe;,., OF REGULATORY 3 g;_CTION * . . 'M>r. & Name / .. Y.2. US ATOMIC E.NEGRY. dld"'.'e6--.:zq 'I rn:e ci.:.d ?J ii; sYbiQ c\ _ 799 ROOSE\IE.LI nD To be ma1J.ect o.r t:..led 1'+-y_.. ____ ..._ _ _._ . GLEN ELLYN. IL 60137 *. DA or BY) , S.UBJE CT D PR-2 5 DRESDEN NUCLEAR POWER ST AT ---------.:1} THIS WILL CONFIRM A CONVERSATION MAURA OF YOUR OFFICE AT -1345 HOURST THIS DATE CONCERNiNG THE DISCOVERY DUR ING ROUTINE 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 SPECIFICATION *. THIS SWITCH WHICH v-1201 (R5-81r * * *::-:c*:*:.-,* ._:_IS THE SO CALLED .2/3 CORE COvERAGE INTERLOCKS _f_0.L99NI_A)_NMENI COOLING ( c* C. c c c

• c. FOUND TO OPERATE AT 259 INCHES OF WATER DECREASING WHICH IS ABOVE * . . . . THE PREMISSABLE SET POINT OF'257 INCHES OF WATER DECREASING. THE SWITCH RESET TO OPEfiATE AT 254.5 INCHES OF WATER. ADDITIONAL DETAILS WILL BE. FORTHCOMING IN THE. FORM OF A TEN DAY LETTER IN ACCOR*. . . DANCE WITH SECTIONS Of THE TECHNICAL SPECIFICATIONS. BB *STEPHENSON SUPERINTENDENT :,

• DRESDEN NUCLEAR POWER STATION COMMONWELATH EDISON CO RR 1 MORRIS IL 60450 *. NNNN *-* ...... * .. :**. *.: . * .. **-.. ' :.,,* ... " . MAY 3 () 1974 . 1 .* c. &F-12ot (RM9) -* * ** * * * .. *: ;-:.