ML19326A161

LER 78-007/03L-0:on 780109,during Monthly Surveillance Test ST 5081.01,diesel Generator 1-1 Tripped on High Crankcase Pressure.Caused by Dirty Crankcase Vent Oil Collector.Vent Oil Collector Disassembled & Cleaned

ML19326A161
Person / Time
Site:	Davis Besse
Issue date:	02/02/1978
From:	Beeler T TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19326A157	List: ML19326A155 ML19326A161
References
LER-78-007-03L, LER-78-7-3L, NUDOCS 8002030033
Download: ML19326A161 (2)

Text

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AC FORM 66  ;

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L.lCENSEE EVENT REPORT p /

G CONTROL BLOCK:. l l l l l l lh (PLEASE PRINT OR TYPE A.. REQUIRED INFORMATl!N) l l@

lR lD lB lS l1 Ql0 l0 l- l0 l0 lN lP lF l- l0 l3 l@l UCEN3EE CODE 14 15 UCENSE NUMBER 2S 26 UCENSE4l TYPE 1l J01l 1l57GATSd 1l@l

ON T olil 8

@u',"c ILl@l01510l-101314 16 @l01110(917 (8 l@l01210f217I8l 60 61 COCKET NUMSER od 69 EVENT DATE 14 75 REPORT DATE do EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h ST 5081.01. "Diesei Gener,- 1 o i 21 l At 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br /> on 1/9/78 when performine Surveillance Test At 1015 l o l a l ltor Monthly Test", Diesel Generator 1-1 tripped on high crankcase pressure.

ST 5081.01, was conoleted at 1255 I o 14 l l hours, the trip was reset and the Surveillance Test 1

oi5Ilhours on 1/9/78. This did not place the unit in the Action Statement of Tech Spee oniv one Diesel Generator to l o (s i 13.S.1.2 because the olant was in Mode 5 which recuires l

ol7j lbe operable for Modes 5 and 6. There was no daneer to the health and safety of the I

.o6al Ipublic or to unit personnel. (NP-33-78-09) 80 COMPONENT CCDE SLB ode SU CE E COE S SC Z 10l9l l El El@ l El@ l D j@ l E l N l C lI l N l E lh l Zl@ J @

13 18 19 23 9 10 11 12 REVIslON 7 8 CCOU R R ENCE REPORT SEQUENTIAL TYPE No.

REPORT No. CCOE gg g,.Ro EVENT YEAR I 01 01 71 W 10 13 I I Ll I-I lo l g @% ,asg u 1718I

,,,,. 21 22 b23 24 26 27 28 29 30 33 32

"' #u"#CTUJER fT $"2ETHO' " HOURS O22 ^UE"TTE' Pc"J it.. 'Tu"4 Sir l42Y l@ l4 Al@ l3l4i8l5l@

O Gl200 'ACW lZl@ lZ{@ l 0 ( 0 J 0 l1 l @@ u 47 33 E lgl34Gl@ 35 26 33 4 el 27 CAUSE DESCRIPTION AND CORRECTIVE ACTICNS crankesse vent I i i ) o l lThe Cause for the hi;;h pressure crankcase trio is attributed to a dirty Under Maintenance Work Order (MWO)78-135, Diesel Generator (DG) 1-1 1 i #iiloil collector.

DG 1-2 will be cleaned I

, , # 21 lcrankcase vent oil collector was disassembled and cleaned.

recurrence the cleaning of the crankcase vent oil col- l

,,3i junder MWO 77-2708. To prevent I

r- pq l lector has been added to the quarterly DG preventive maintenance program.

• 7 a s 01 C Y OtScoVERY DESCRIPTION

% POWER oTHER STATUS ST ST 5081.01 l l t 151 dh l 0 l 0 l 0 lhj NA , 44 l [5l@lSurveillanceTest 45 de s0 12 11 7

s4 ig, LOCATION OF RELEASE RELEASED OP RELEASE AMOUNT OF ACTIVITY l l l NA Ii is 1 7 8 9 IZ l @ l10Z l@l NA tt 44 45 BC PERSONNEL EXPOSURES NUM8ER TYPE D ESCRIPTION l

l i l 71 le 10 to j@l Zl@l NA "

' ' ,ERSON~a',N2u'J ES

NuvsER oESCRiPTioN@ l 10 10 10 l@l 12NA it 80 7

LusJlZl@lN^

T E DESCR PT ON 80020303} 80 l

7 8 9 10 8

DE CRIPTION i i i i i i i i i i uj i i

i ns i 'S$UEf81NA iN a ., sc. ,

Tom Beeler PHONE: (419 ) 250-900 St . 253 {

am u..E oc PacoAnc.

~ TOLEDO EDISON COMPANY N DAVIS-BESSE UNIT ONE iiUCLEAR POWER STATION SUPPLEMENTAL INFORMATION FOR LER NP-33-78-09 l

DATE OF EVENT: January 9, 1978 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Diesel Generator 1-l' tripped on high crankcase i pressure.

4 m Conditions Prior to Occurrence: The unit was in Mode 5, with Power (MWT) = 0, and Load (MWE) = 0.

Description of Occurrence: At 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br /> on January 9,1978 when performing Surveil-lance Test ST 5081.01, " Diesel Generator Monthly Test", Diesel Generator 1-1 tripped  ;

on high crankcase pressure. At 1015 hours0.0117 days <br />0.282 hours <br />0.00168 weeks <br />3.862075e-4 months <br />,,the trip was reset and the Surveillance l Test ST 5081.01, was completed at 1255 hours0.0145 days <br />0.349 hours <br />0.00208 weeks <br />4.775275e-4 months <br /> on January 9, 1978.

l This did not place the unit in the Action Statement of Technical Specification 3.8.1.2 because the plant was in Mode 5 which requires only one Diesel Generator l co be operable for Modes 5'and 6.

i

. Designation of Apparent Cause of Occurrence: The cause for the high pressure crank-case trip is attributed to a dirty crankcase vent oil collector. I Analysis of Occurrence: There was no danger to the health and safety of the public or to unit personnel. The Diesel Generator was not required for emergency power during the period of time it was inoperable. Diesel Generator 1-2 was operable had emergency power been required.

• 1 Corrective Action: Under Maintenance Work Order MRO 78-135, Diesel Generator 1-1

] crankcase vent oil collector was disassembled and cleaned. Diesel Generator 1-2

~

l will be cleaned under Maintenance Work Order 77-2708. To prevent recurrence, cne cleaning of the crankcase vent oil collector has been added to the quarterly diesul generator preventive maintenance program.

Failurs Data: There have been no previous reportable failures of the Diesel Genera-cars caused by high crankcase pressure.

LER #78-007

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