ML18081A865

Forwards LER 78-035/03L-0

ML18081A865
Person / Time
Site:	Salem
Issue date:	07/20/1978
From:	Librizzi F Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18081A856	List: ML18081A855 ML18081A857 ML18081A858 ML18081A859 ML18081A860 ML18081A861 ML18081A862 ML18081A863 ML18081A864 ML18081A865 ML18081A867
References
NUDOCS 8001080541
Download: ML18081A865 (3)

Text

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Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07iD1 Phone 201/622-7000 July 20, 1978 Mr. Boyce H. Grier Director of USNRC Off ice of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 78-35/03L Pursuant *to the requirements of Salem Generating Station Unit No. 1 Technical Specifications~ Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 78~35/03L. This report is required ~ithin thirty (30) days of the occurrence.

Sincerely yours,

), . .

F* P *~b".

. Li rizz1 General Manager -

Electric Production CC: Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies) 8001080 5 '-f I

. /

Report Number: 7'-35/03L Report Date: 7/20/78 Occurrence Date: 6/30/78 Facility: Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Loss of No. 2 Station Power Transformer (Interconnect between offsite transmission network and onsite Class lE).

• CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 1 - Reactor Power 90%

DESCRIPTION OF OCCURRENCE:

At 1453 hours0.0168 days <br />0.404 hours <br />0.0024 weeks <br />5.528665e-4 months <br />, the Gas Turbine was being placed in service when the control operator noticed that there was no electrical output from this unit. The operator stopped the gas turbine. When the gas turbine 13kV output breaker opened, *the 13kV Bus Section 4-5 breake~ also opened causing a ~oss of p9wer to No. 2 Station Power Transformer. Vital buse:

swapped over to No. 1 Station Power Transformer. Action Statement 3.8~1.l.a was implemented. At 1716 hours0.0199 days <br />0.477 hours <br />0.00284 weeks <br />6.52938e-4 months <br />, power was restored to No. 2 Station Power Transformer and applicable Action Statements were terminated.

DESIGNATION OF APPARENT CAPSE OF OCCURRENCE:

The cause of this occurrence was operator error. The 13kV Gas Turbine output breaker was found to be in the test position rather than fully racked in. Opening of this breaker in this condition caused relay operation resulting *in opening of the 13kV Bus Section 4-5 Br~aker and loss of power to the No. 2 Station Power Transformer.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.8.1.1.a allows 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to restore an inoperable offsite circuit to operable status. The No. 2 Station Power Transformer was returned to operable status within 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />, therefore, the Technical Specifications were not violated.

CORRECTIVE ACTION:

Following the loss of power to No. 2 Station Power Transformer, maintenance personnel found the 13kV Gas Turbine output breaker in the test position. Investigation showed no equipment damage and power was restored to No. 2 Station Power Transformer.

To prevent reoccurrence of this type of event, the responsible operator was reinstructed on the proper method of breaker operation.

• . 'LER* 78-35/03L

• f> e- FAILURE DATA:

N/A

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Prepared by__~T_.--'L_.~S~p~e~n~c_e~r------~

SORC Meeting No. 46-78

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