ML19273B415

LER 79-014/03L-0 on 790305:U2 Diesel Generator Failed to Start on First & Fifth Attempts.Caused by Bendix Gear Failure to Engage & Failure of Air Start Solenoid to Energize.Solenoid Was Replaced

ML19273B415
Person / Time
Site:	Dresden
Issue date:	03/30/1979
From:	Chan J COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A726	List: ML17173A725 ML19273B415
References
LER-79-014-03L-01, LER-79-14-3L-1, NUDOCS 7904060324
Download: ML19273B415 (1)

Text

LICENSEE EVENT REPORT

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION!

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0 l 5DATEl 7 l 9 }@l 0l REPORT 74 75 3l 3lOATE0l 7l 9l@ 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 l With Unit 2 at steady operation, U2 D/G failed to start on first attennt. It then [

started properly three times before it failed again on the fifth start. Safety sig-nificance minimal because redundant diesel was available. Similar occurrences as l referenced in R.O. #50-237/1979-50, R.O. #50-237/1977-11, I #-12-2-72-9, I #-12-2 26, I #-12-2-75-39.

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3/ 4a 42 43 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l One of :.ne Bendix gears failed to engage properly on first start attempt. On fifth l i i l attempt the air start solenoid was not heard to enercize. The solenoid was replaced I and tested, but no fa.it was found. Diesel successfully started more than 5 times  ;

during trouble shooting and twice since. The multiple start nodification which will [

be installed shortly will help eliminate air start motor problem.  ;

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