ML17252B035

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Letter Confirming a 06/04/1974 Conversation Concerning an Apparent Failure of the (D) Main Steamline High Radiation Monitor - Dresden Unit 3
ML17252B035
Person / Time
Site: Dresden Constellation icon.png
Issue date: 06/04/1974
From: Stephenson B
Commonwealth Edison Co
To: O'Leary J
US Atomic Energy Commission (AEC)
References
Download: ML17252B035 (1)


Text

Regulatory .,Docket *File

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U5AEC HQS GTWN

/ lLXA179 WAE235<1_756><1-038694C155002>PD 06/04/74 17.40 ICS IPMVEIC MVN 1974 JUN 4 PM 9 4$

03~31 TOVE MORRIS IL'.JJ7 06-0,4 215P.CDT P~S .J F o.t LEARY DIRECTOR DIRECTORIATE OF LieENSING 5 o*~ 2 4 9

. U5_~TOMIC ENERGY COMMISSION

. wux ':' :~~241)

WASHINGTON_ DC . 60137

/

I SUBJECT DPR-25~ DRESDEN NUCLEAR POWER STATION UNIT 3.

lliIS WILL CONFIRMATION CONVERSATION_ WITH F. MAURA OF YOUR

-~FIC~At 1330 HOURS THIS DATE CONCERNI~G AN APPARENT *

  • ,.*F'A.lLURE OF THE CD> MAIN STEAMLINE HIGH RADIATION MONITOR DISCOVERED DURING WEEKLY SURVEYLANCE TESTING. THE CD>

MC\JN STEAML1IN HIGH RADIATION MONITOR FAILED TO l~IP WHEN

~SIMULATED HIGH RADIATION SIGNAL WAS INJECTED* AN

" INVESTIGATION IS CURRENTLY 'UNDERWAY TO DETERMINE IF IT IS A MONITOR FAILURE .

OR MERELY A FAILURE OF THE JEST CIRCUIT.

ADQITIONAL DETAILS AND THE RESULTS OF THE INVESTIGATION WILL BE FORTHCOMING IN THE FORM OF A 10 DAX LETTER IN *

~CORDANCE WITH SECTION 6.6.B*l*A OF THE. TECHNICAL SPECIFICATIONS.

B B STEPHENSON SUPERINTENDANT

.DR.ESDEN NUCLEAR POWER ' STATION COMMONWEALTH EDISON COMPANY RR # 1

~ORRIS ILLINOIS 60450

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U5AEC HQS GTWN

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