ML20126B330

RO 80-11:on 800227,during Routine Surveillance Testing, Diesel Generator 21 Did Not Achieve Rated Speed in Less than 10-s.Adjustments to Governor Control Sys Required.Details Re Cause & Corrective Actions Will Be Provided in 14-day Rept

ML20126B330
Person / Time
Site:	Calvert Cliffs
Issue date:	02/28/1980
From:	Denton R BALTIMORE GAS & ELECTRIC CO.
To:
References
NUDOCS 8003110365
Download: ML20126B330 (1)

Text

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February 28, 1980 TO:

Mr. E. C. McCaoe 0.s. tiuc1 war Regulatory Ca i ission FRON:

R. E. Denton Dal tinore Gs & Electric Ccmipany

SUBJECT:

Failure of d21 Diesel heterator to carach rated socad in 10 sacands The inforu4 tion included herein confinns our pi.one conversation of FeDruary 27, l'Jdo, oil tsie sais.e suoj=ct.

While pe'rforming routina surveillance testing on #21 Diesel unerator at 2:10 p.m. on February 27,1980, i t was, 4:scovered ena t tne diesel did not acnieve rated speed in less cnaa 10 seconds.$s requts o 'vo Technical Spect fication 4.8.1.1.2.a.4.

A follow-up case was perfumed i

at 2:48 p,d.; rated speed and vol tage was achieved in 16 seconds.

During this time, #21 LPSI pump was tagged out of service to i=rforn coupling aligranent checus due to higner-tniso normial v tbratlan (vibratiovi in the " alert

• range).

This puup had been out of servtce since 7:00 a.m. c4 February 25, 1980, Since 421 Diesel Cenerator provides emergency power to 422 LPSI ptmap the operebility require *=nts (Twennical Specification 1.6) were not fully satisfieo for this poing.

Subsequent to the test perfonned at 2:28 p.m.

1. 21 Otesel Generator was lef t running and aligned to 4 KV Unit dus 24 to assure an 4.ocenency po6ser source to /22 LPSI pupp.

During the entire tii.., bo th norual sources of off-stra A.C. power were avai tavle.

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At 6:30 p.m., #21 LPSI pump was returvied to service.

Subsequently.

d21 Diesel was rwnuved frces service to allow trauole snootin<t, At this time, ic appears. tnat adjustmerits to the govervior control systani are required; these adjusaaents are in progress.

Hoew details regarding tne cause end corrective Actions will be provided in the 14-day report..

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