05000282/LER-1979-032-03, /03L-0:on 791221,during Surveillance Test, Diesel Generator 2 Tripped on High Crankcase Pressure. Apparently Caused by Cooling Water Leaking Into Lube Oil Sys & Accumulating During Shutdown Periods

/03L-0:on 791221,during Surveillance Test, Diesel Generator 2 Tripped on High Crankcase Pressure. Apparently Caused by Cooling Water Leaking Into Lube Oil Sys & Accumulating During Shutdown Periods

ML19257B981
Person / Time
Site:	Prairie Island
Issue date:	01/18/1980
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19257B977	List: 05000282/LER-1979-032, Forwards LER 79-032/03L-0 05000282/LER-1979-032-03, /03L-0:on 791221,during Surveillance Test, Diesel Generator 2 Tripped on High Crankcase Pressure. Apparently Caused by Cooling Water Leaking Into Lube Oil Sys & Accumulating During Shutdown Periods
References
LER-79-032-03L, LER-79-32-3L, NUDOCS 8001220495
Download: ML19257B981 (1)

LER-1979-032, /03L-0:on 791221,during Surveillance Test, Diesel Generator 2 Tripped on High Crankcase Pressure. Apparently Caused by Cooling Water Leaking Into Lube Oil Sys & Accumulating During Shutdown Periods

Event date:
Report date:
2821979032R03 - NRC Website

text

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ISE E8./l U. 5. NUCLE AR REGULATORY COMMISSION NRC FORM 366 (7-77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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8 60 61 DOCK E T NUMBER 68 69 EVENT DATE 74 lb REPOR T DATE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES l o 12 l l During surveillance test, D2 Diese Generator tripped on high crankcase pressure. I Several days of troubleshooting showed that the diesel generator is operable if keitt i o,3 ; ;

rgjl hot.

The diesel is running loaded continuously until repairs can be made.

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lo is1 Redundant diesel generator was operable. Not repetitive. No effect on public 10 is 1 1 hea' th and safety. Tech Spec 3.7.A.5 applies.

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O a I SYSTEM C A USE

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VALVE CODE CODE SU8 CODE COYPONENT CODE SU8 CODE SU8 CODE l E l E l@ W@ l Xl@

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40 41 42 43 44 ef CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h It appears that cooling water leaks into the lube oil system and accumulates dur'.ngt i

o i shutdown periods. The diesel generetor is running and is operable. Further 1

investigations will be done and an update report issued.

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8 9 STA S

% POWE R OTHER STATUS DISCO RY DISCOVERY DESCRIPTION NA I

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s A TivlTY CO TENT HELE ASED OF RE LE ASE AVOUNT OF ACTIV'TY LOCATION OF RELE ASE NA l

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3 9 10 11 44 45 80 PE RSONS.E L E XPOSURES NUVRER TVPE C E SCRIP TION l 0] 0l0 l@[Zj@l NA l

i 7 PE RSONNE L INJU IES NUMeER DE SC rip TION l0]OOl@l NA i a 7

8 9 11 12 80 LOSS OF OR DAMAGE TO F ACILITY TYPE DE SCRIPTION Lz.J@l NA l

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H 9 10 80 PUB L ICI T Y NRC USE ONL Y LN,1 l

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nstad 612-388-4767 NAME OF PREPARER PHONE.

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