05000311/LER-1981-016, Forwards LER 81-016/03L-0.Detailed Event Analysis Encl

Forwards LER 81-016/03L-0.Detailed Event Analysis Encl

ML18086A617
Person / Time
Site:	Salem
Issue date:	05/28/1981
From:	Uderitz R Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18086A618	List: 05000311/LER-1981-016, Forwards LER 81-016/03L-0.Detailed Event Analysis Encl 05000311/LER-1981-016-03, /03L-0:on 810430,operator Noticed Control Wires Glowing in 2B Diesel Exciter Cabinet.Caused by Sticking of Field Flashing Relay.Relay Cleaned & Field Flashing Resistors Replaced
References
NUDOCS 8106040415
Download: ML18086A617 (3)

LER-1981-016, Forwards LER 81-016/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111981016R00 - NRC Website

text

(~~ PS~G Public Service Electric and Gas Company 80 Park Plaza Newark, N.J. 07101 Phone 201/430-7000 Mr. Boyce H. Grier Director of USNRC May 28, 1981 Off ice of Inspection and Enforcement Region 1 631 Park Avenue King of Pruss~a, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 81-16/03L Pursuant to the requirements of Salem Generating Station Unit No. 2 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 81-16/03L.

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

Sincerely yours, n~ZA;;;p

~.-A. ~p General Manager -

Nuclear Production CC:

Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies) in-:: EnerO\\* PeopiE-jloo}.

.s J/!

Report Number:

Report Date:

Occurrence Date:

Facility:

81-16/03L May 28, 1981 4/30/81 Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Electrical Power System Shutdown CONDITIONS PRIOR TO OCCURRENCE:

Mode 5 -

Rx Power 0% - Unit Load O MW DESCRIPTION OF OCCURRENCE:

While taking readings, an operator noticed control wires glowing in the 2B Diesel Exciter Cabinet.

The No. 4 Breaker in 2BBDC cabinet was tagged out de-energizing the affected wiring and making 2B Diesel inoperable.

The 2C Diesel was tagged out at this time.

At 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> on April 30, 1981, Action Statement 3.8.1.2.b was entered.

This occurrence constituted operation in a degraded mode in accordance with Technical Specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

Equipment Failure -

The field flashing relay was sticking.

ANALYSIS OF OCCURRENCE:

The sticking field flashing relay caused an overcurrent in the field flashing circuit which necessitated removing 2B Diesel from service thereby rendering two diesels inoperable.

Technical Specification 3.8.1.2 requires with less than two diesels operable, suspend all operations involving core alterations 0r positive reactivity changes until the minimum required AC electrical power sources are restored to operable status.

CORRECTIVE ACTION

The field flashing resistors were replaced as a preventive measure, the field flashing relay was cleaned, and the field flashing circuit was tested satisfactorily.

At 1458 hours0.0169 days <br />0.405 hours <br />0.00241 weeks <br />5.54769e-4 months <br /> on April 30, 1981, Action Statement 3.8.1.2.b was terminated.

LER 81-16/03L FAILURE DATA:

Four Field Flashing Resistors Ohinite 5-200 w Type T47-270-225P-46 Prepared By J. J. Espey SORC Meeting No.

81-39 2 -

5/28/81