ML20084L910

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Telecopy Ro:On 740520,during Functional Instrument Test, Instrument Drift Pressure Switch PS2-5048 Actuated at 401 Psi,In Excess of Tech Specs.Cause Not Stated
ML20084L910
Person / Time
Site: Dresden Constellation icon.png
Issue date: 05/20/1974
From: Stephenson B
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084L907 List:
References
NUDOCS 8305240200
Download: ML20084L910 (3)


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PMS JAMES G KEPPLER DIRECTORTDIRECIORATEUDF3 REGULATOR.0PERATIONS REGENT 3 WUS US ATOMIhShpMWISSION-cff&n266 f

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"-: SUBJ ECT : DPR-19 Attempts to deliver (Indicate DA or LY) l3 DRESDEN NUCLEAR POWER ST'ATTON UNIT"2.

O c-co THIS WILL CONFIRM CONVERSATION WITH NR F MAURA 0F YOUR OFFICE AT 1045 HOURS THIS. DATE CONCERNING. INSTRUMENT DRIFT PRESSURE

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SWITCH PS2-504B.WHICH ALLOWS BYPASS AT LESS THAN 450/0~

h RATED STEAM FLOW 0F THE GENERATOR LOAD REJECTION AND. TURBINE STOP.

N VALVE CLOSURE SCRAM. THE SWITCH HAS FOUND TO ACTUATE AT 401 PSI (INCREASING)(LIMIT 395 PSI INCREASIhG ) DURING

,,,,g gCTIONAL~ INSTRUMENT TEST. THIS IS CONTRARY TO SECTION 3 1

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Incident Not ification From : Comonwealth Edison Co.

Docket No. 50-237 g

(Licensee & Docket No. (or License No. )

0 9m Transmittal Date June 5, 1974 S

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