PNO-III-85-095C, on 851212,diesel Generator 14 Tripped on Low Lube Oil Pressure During Test Run.Bearing Failure & Erratic Behavior of Svc Water Pump Under Investigation as Possible Causes.Generator Will Be Monitored

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PNO-III-85-095C:on 851212,diesel Generator 14 Tripped on Low Lube Oil Pressure During Test Run.Bearing Failure & Erratic Behavior of Svc Water Pump Under Investigation as Possible Causes.Generator Will Be Monitored
ML20138L131
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 12/12/1985
From: Chrissotimos N, Wright G
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
PNO-III-85-095C, PNO-III-85-95C, NUDOCS 8512190173
Download: ML20138L131 (1)


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l> rh8 PRELIMINARY NOTIFICATION OF EVENTLOR UNUSUAL.0CCURRENCE--PNO-III-85-95C_ Date D cemb;r 12, 1985 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety i :cr public interest significance. The information is as initially received without xv:rification or evaluation, and is basically all that is known by the Region III staff on this date.

Facility: Detroit Edison Company Licensee Emergency Classification:

1 Fermi 2 Nuclear Power Station Notification of an Unusual Event Newport, MI 48166 Alert <

Site Area Emergenc Docket No: 50-241- General Emergency g XX Not Applicable

Subject:

DAMAGE-T0 DIESEL GENERATOR DURING TESTING (THIRD UPDATE)

Dinsol Generator #14 was nine hours into a scheduled 100-hour test run when it tripped on low lube oil pressure at 8:45 a.m. (CST), December 12, 1985. Both Diesel Generators

-#13 and #14 had'recently experienced bearin ~

repairs. .(See PNO-III-85-95, 95A, and 958)g problems and were in a test run following The licensee is investigating two possible causes for the latest problem: bearing failure and the erratic behavior of #14's service water pump. The licensee reported that at about 7 a.m., the service water pump tripped off for about 19 seconds and then came back on.

' It later tripped for about 4 minutes. Shortly after it came back on,-the #14 diesel generator tripped.-

-Diesal Generator _#13 testing is in progress while diesel generators #11 and #12 are being reassembled following inspection and repair.

' Regi;n III (Chicago) and the Office of Nuclear Reactor Regulation continue to monitor the diesel generator problems. The impace of this most recent problem on plant availability for restart is unknown at this time.

The State of Michigan will be notified.

Region III received this updated information at 9:45 a.m. (CST), December 12, 1985. This

.information is. current as of 11:45 a.m., (CST), December 12, 1985.

~ CONTACT: G. Wrig t N. ri sotimos FTS 388-5695 FTS 388-5716 DISTRIBUTION:

H. St. . EDO NRR E/W Willste Mail: ADM:DMB Chairman Palladino PA IE NMSS D0T:Trans only Comm. Zech ELD OIA RES Conn. Bernthal AE0D Comm.- Roberts Comm. Asselstine SP dD A Regional Offices ACRS SECY INP0 d Dt) NSAC O. M CA RIII Resident Office PDR- Licensee: 3D(s (Corp. Office-ReactorLic.Only) ,

0512190173 851212 7gy L N-BIUcGD-@D9 PDR __ d'9IONIII