05000272/LER-1980-014, Forwards LER 80-014/03L-0

Forwards LER 80-014/03L-0

ML18081B309
Person / Time
Site:	Salem
Issue date:	03/31/1980
From:	Librizzi F Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18081B310	List: 05000272/LER-1980-014, Forwards LER 80-014/03L-0 05000272/LER-1980-014-03, /03L-0:on 800303,ground Developed on Power Supply Line to Unit 3,resulting in Loss of Station Power Transformer 12.Power Supply Line Replaced & Transformer re-energized
References
NUDOCS 8004040317
Download: ML18081B309 (3)

LER-1980-014, Forwards LER 80-014/03L-0

Event date:
Report date:
2721980014R00 - NRC Website

text

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() PS~G Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /430-7000 Mr. Boyce H. Grier Director of USNRC March 31, 1980 Off ice of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 80-14/03L Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 80-14/03L.

This report is required within thirty (30) days of the occurrence.

Sincerely yours,

);~

F. P. Librizzi General Manager -

Electric Production CC:

Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control

( 3 copies)

Aood.

5 1/1 3004040~\\7 95*2001 (200MJ 2-78

Report Number:

80-14/03L Report Date:

3/31/80 Occurrence Date:

3/03/80 Facility:

Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Loss of Off-Site Power Source CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 Reactor Power 100%

Unit Load 1140 MW DESCRIPTION OF OCCURRENCE:

At 2227 hours0.0258 days <br />0.619 hours <br />0.00368 weeks <br />8.473735e-4 months <br />, a ground occurred on a power supply line to #3 Unit which caused 2T60 breaker to open resulting in #2 Station Power Transformer being de-energized.

The 13 kV breakers #4-5 and #3-4 opened de-energizing #12 Station Power Transformer.

Action State-ment 3.8.1.l(a) was entered at 2227 hours0.0258 days <br />0.619 hours <br />0.00368 weeks <br />8.473735e-4 months <br /> which requires with either an offsite circuit or diesel generator inoperable, the operability of the remaining power sources must be proved within one hour and at least every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter; restore at least two offsite circuits and three diesel generators to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in cold shutdown within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

Repairs were effected to the line and the Action Statement was terminated at 0611 hours0.00707 days <br />0.17 hours <br />0.00101 weeks <br />2.324855e-4 months <br /> on March 5, 1980.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

A ground in the underground cable in the power supply to #3 Unit.

ANALYSIS OF OCCURRENCE:

Upon loss of #2 Station Power Transformer and #4-5 and #3-4 13 kV Breakers, #12 Station Power Transformer was de-energized because

1. 2-3 and #5-6 13 kV Breakers are normally opened to provide two independent circuits.

With #5-6 Breaker normally open and #4-5 Breaker opening on loss of 2T60, all power was lost to #12 Station Power Transformer.

"i.ER 80-14/03L CORRECTIVE ACTION:

A new power supply cable was installed removing the ground allowing 2T?O_to be re-energized.

FAILURE DATA:

Not Applicable Prepared By M. J. Murphy SORC Meeting No.

21-80