05000206/LER-1981-015, Forwards LER 81-015/03L-0.Detailed Event Analysis Submitted

Forwards LER 81-015/03L-0.Detailed Event Analysis Submitted

ML20030B191
Person / Time
Site:	San Onofre
Issue date:	07/22/1981
From:	Haynes J SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20030B192	List: 05000206/LER-1981-015, Forwards LER 81-015/03L-0.Detailed Event Analysis Submitted 05000206/LER-1981-015-03, /03L-0:on 810630,during Monthly Operability Test Number 2 Diesel Generator Tripped.Caused by Lube Oil Draining Through Tygon Tubing.Installation of Tubing Was Design Deficiency.Tubing Removed & Lube Oil Added to Tank
References
NUDOCS 8108060211
Download: ML20030B191 (2)

LER-1981-015, Forwards LER 81-015/03L-0.Detailed Event Analysis Submitted

Event date:
Report date:
2061981015R00 - NRC Website

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Region V 1990 North California Boulevard Suite 202, Walnut Creek Plaza 9-U DG 0519g4 Walnut Creek, California 94596 2

Attention: Mr. R. 'i. Engelken, Director D

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J No. 50-206 NOFRE - UdIT 1

Dear Sir:

This letter describes a reportable occurrence involving leakage of diesel generator lubricating oil.

Submittal is in accordance with the reporting requirements of Section 6.9.2.b of Appendix A to Provisional Operating License DPR-13.

On June 30, 1981, during the monthly diesel generator operability test, the No. 2 diesel generator tripped.

Local operator inspection revealed a low oil level in the diesel engine lube ' oil storage tank. As a result, the No. 2 diesel was declared inoperable.

In accordance with Technical Specification requirementr, the No.1 diesel generator and at least two offsite transmission lines were verified cperable within one hour and every eight hours thereaf ter until the diesel was returned to service.

Subsequent investigation into the cause of the low oil level revealed lube oil draining from the tank to a floor drain through a piece of tygon tubing attached to a valved drain line. The drain valve was not fully closed, apparently due to personnel error, allowing the oil to leak from the tank. The tygon tubing was being used for local lube oil tank level indi cation.

Lube oil was added to the tank to replace that which was lost. The tygon tubing was removed and the valved drain.line capped to p.-event recurrence of this event.

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8108060211 810722 PDR ADOCK 05000206 l

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l U. S. fluclear Regulatory Commission Page # 2 There was no detectable damage to the diesel generator as a result of this incident.

If you have any questions, or desire further information on this matter, please contact me.

Very trul yours, J. G. Hayss Manager of Muclear Operations GRM:dh:74U Enclosure: Licensee Event Report 81-015 L. Miller (HRC Resident Inspector - San Onofre Unit 1) cc:

Director, Office of fianagenent Infornation A Program Control g

Director, Huclear Safety Analysis Center