05000373/LER-1982-020, Forwards LER 82-020/03L-0.Detailed Event Analysis Encl

Forwards LER 82-020/03L-0.Detailed Event Analysis Encl

ML20054F602
Person / Time
Site:	LaSalle
Issue date:	06/08/1982
From:	Holyoak R COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20054F603	List: 05000373/LER-1982-020, Forwards LER 82-020/03L-0.Detailed Event Analysis Encl 05000373/LER-1982-020-03, /03L-0:on 820512,while Performing LOS-FP-W2,OA Diesel Tripped After Running 2 Mins.Caused by Operator Shorting Out Starter W/Engine Oil Dipstick During Test. Control Circuit Repaired
References
NUDOCS 8206170148
Download: ML20054F602 (2)

LER-1982-020, Forwards LER 82-020/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3731982020R00 - NRC Website

text

,

_N Commonwealth Edison h LtSailsCountyNuctetrStation c.2 f Rural Route #1, Box 220 7 Marseilles, Illinois 61341 v

Q Telephone 815/357 6761 June 8, 1982 James G. Keppler Regional Administrator Directorate of Regulatory Operations, Region t il U. S. Nuclear Regulatory Commission 799 Rooseve1t Road Glen Ellyn, IL 60137

Dear Sir:

Reportable Occurrence Report #82 20/03L-0 Docket #050-373 is being submitted to your office in accordance with LaSalle County Nuclear Power Station Technical Specification 6.6.B.2.(b), conditlons leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limiting condition for operation.

s k.0 R. H. Holyoak Superintendent LaSalle C )unt-Station RHH/GW/djp Enclosure cc:

Director of Inspection & Enforcement Director of Management Information & Program Control V. S. NRC Document Management Branch inpo-Records Center File /NRC

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VUN j 4 $

8206170148 820608 PDR ADOCK 05000373 S

PDR 5WAL

s l.

LER NUMBER:

82-020/03L-0 II.

LASALLE COUNTY STATION:

Unit 1 111. DOCKET NUMBER:

050-373 IV.

EVENT DESCRIPTION

Technical Specification 3 7 5.1.a requires two operable fire suppression diesel driven fi re pumps. With one fire pump inoperable, the inoperable pump is to be restored to operable status within 7 days.

On 5/12/82, while performing LOS-FP-W2 the 0A Diesel tripped after 2 minutes into the run.

The diesel could not be run for greater than two minutes thereaf ter.

V.

PROBABLE CONSEQUENCES OF THE OCCURRENCE During the time that the OA Diesel Fire Pump was 11 operable, the OB Diesel Fire Pump was available to provide fire protection, as was the service water system.

Adequate fire protection was maintained at all times.

VI.

CAUSE

While performing LOS-FP-W2, an operator shorted out the starter on the OA Diesel with the engine oil dipstick. This action caused control circuit damage, rendering the diesel inoperable.

Vll. CORRECTIVE ACTION Work Request L15587 was written to repair the diesel control circuitry.

The work request was completed on 5/13/82 and the diesel was tested and found to be operable.

To prevent future recurrence, the starter connections at the diesel have been insulated with electrical tape.

Other connections having the possi-bility of shorting were also taped on both the OA and the OB Diesels. This work was done under work request L15586.

A