ML20031C283

RO 76-08:on 760516,diesel Generator Supplying Load to Buses 1A & 2B Tripped on High Cooling Water Temp.Caused by Scored Cooling Pump Shaft.Shaft Replaced.Inlet Screen Partially Plugged.Discharge Canal Flushed

ML20031C283
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	06/09/1976
From:	Sewell R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
RO-76-08, NUDOCS 8110070021
Download: ML20031C283 (2)

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@ l Diesel generator was supplying load M ^' E to buses lA and 2B following an over-l 7 eU 80 g l load tripping of breaker 52-2A. vhen the diesel tripped ^on high cooling vater teme. l 7 89 80 o

l werature. Remote manual switching restored required loads and the cooling defi-l 7 89 80 Q l cieneles were subsequent]y corrected and th'e unit tested with fire pu=p load.

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8 9 (RO-8-76) - Shmiinr and reIAted to R0-4-76, reported h/15/76.

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y lC l1l 7l0 l 7 89 10 11 12 17 43 44 47 48 CAUSE CESCMTON l The ecd': ytje shaft was found scored and was replaced. The inlet screen was l

e 7 89 60 l partiall;, ylu,'ged,anddhe discharge Cml vcs flushed after removing stop logs to l

09 7 e9 80 g l clear debris frem the ' discharge canni. bay..

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7 89 11 12 13 60 PERSCNNEL INJUP'ES NuustR ctscasrtoes l 0l 0l 0l l NA 14 l

7 89 11 12 80 PROBABLE CONSEQUENCES 15 l None; the plant was in cold shutdown mode.

l 7 89 80 LOSS DA DAMACE TO FACIUTY DE l

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POW 8r Company OS D i[I WW u

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June 9, 1976

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l Mr James G. Keppler

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IS Nuclear Regulatory Co=ission g

799 Roosevelt Road g

Glen Ellyn, IL 60137 G

DOCKET 50-155, LICE'iSE DPR-6 BIG ROCK POINT PIMIT, LER - RO-8-16 Attached is a reportable event (RO-8-76) which describes the tripping of the emergency diesel generator on high cooling water temperature.

R. B. Sewell (Signed)

R. B. Seve n

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Nuclear Licensing Administrator t

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