ML19319E432

AO-50-313/75-9:on 751120,during Diesel Generator 2 Test,Oil Leak Developed at Oil Cooler Outlet Flange.Caused by O-ring Gasket Failure.Gasket Replaced & Diesel Generator 2 Tested to Verify Operability & Gasket Tightness

ML19319E432
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/05/1975
From:	David Williams ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19319E431	List: ML19319E430 ML19319E432
References
NUDOCS 8004100710
Download: ML19319E432 (4)

Text

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O Abnormal Occurrence Report No. 50-313/75-9'

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Occurrence Date: November 26, 1975

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2. Report Date: December 5, 1975

4. Facility: Arkansas Nuclear Onc-Unit 1 Russellville, Arkansas

5. Identification of Occurrenec:

Number 2 Diesel Generator (K4B) lube oil cooler outlet flange Icak. 4

6. Conditions Prior to Occurrence:

2542 blWth X Reactor Power Steady-State Power 836 blNe Not Output llot Standby Percent of Full Power 99 Cold Shutdown -

n Load Changes During Rou.tinc Refueling Shutdown _

Pouer Operation _

, Routine Startup -

Operation Routino Shutdown Operation Other (specify) i'

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7. Description of Occurrence: '

During th'e testing of No. 2 Diesel Generator'(K4B) flange. Theat test 0930 was on 11/26/75, an oil leak developed at the oil cooler outlet ,

being conducted in order to remove No. 1 Diesel Generator (K4A) from service for the performance of routine maintenance. .

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NSP ID, itev. 2

' Pat:c 2 of 4 R reh al,1975 .

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\ Ab%rmal Odcurrence. Report ko. 50-313/75-9

8. Desip, nation of Apparent Cause of Occurrence:

Design Procedure .

Skniufacturc . IJnusual S$rvice Condition ~~

Including linvi ronmenta1 Installation /

Construction Component Failurc X ,

. Operator Other (specify) ,

Apparent 0-ring gasket failure.

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, 9. Analysis of Occurrence:

Number 2 diesel generator was inoperable from 0930 until 1430 for gasker.

' replacement. The remaiping diesel generator (No.1) was verified operabic at 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br />. Since the remaining diesel generator was verified dperable, a

there was no hazard to the health and safety of the public. ,

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'Sbrch 4, 1975 NSP-10,Itev. 2 Page 3 O l' l l 6

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i Abnormal Occurrence Report No. 50-313/75-9

, 10. Corrective Action:

0-ring gasket was replaced and No. 2 diesel generator tested to verify operability and gasket leak tightness.

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11. Failuro Data: .-

l l No previous failures of this type. - (

l i l Equipment identification: (

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) Stewart 6 Stevenson 5 i 2750 KW

. . GM Diesel i

Electric Products Generator i

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Kirch 4, Ib75 NSP-10, Rev. 2 Panc 4 of 4 ..

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