05000311/LER-1982-005, Forwards LER 82-005/03L-0.Detailed Event Analysis Encl

Forwards LER 82-005/03L-0.Detailed Event Analysis Encl

ML20049H769
Person / Time
Site:	Salem
Issue date:	02/19/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20049H770	List: 05000311/LER-1982-005, Forwards LER 82-005/03L-0.Detailed Event Analysis Encl 05000311/LER-1982-005-03, /03L-0:on 820121,during Performance of M3T Maint Surveillance Test Undervoltage Relay on 2C Vital Bus Actuated at 5.5 Volts Instead of 77.3 Volt Trip Setpoint Value.No Defects Found.Relay Recalibr
References
NUDOCS 8203030540
Download: ML20049H769 (3)

LER-1982-005, Forwards LER 82-005/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111982005R00 - NRC Website

text

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O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station February 19, 1982 Mr.

R.

C. Haynes N

Regional Administrator to USNRC

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Region 1 631 Park Avenue R E: '.,..

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King of Prussia, Pennsylvania 19406

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Dear Mr. Haynes:

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LICENSE NO. DPR-75

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DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-05/03L Pursuant to the requirements of Salem Generating Station Unit No. 2, Technical Specifications, Section 6.9.1.9.a, we are submitting Licensee Event Report for Reportable Occurrence 82-05/03L.

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

Sincerely yours, kl f H.

J.

Midura General Manager -

Salem Operations FD:al CC:

Distribution 8203030540 820219 PDRADOCK05000g S

,p The Energy People

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. Report Number:

82-05/03L Report Date:

02-19-82 l

Occurrence Date:

01-21-82 Facility:

Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

2C Vital Bus Undervoltage Relay - Inoperable.

This report was initiated by Incident Report 82-017.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 94% - Unit Load 1090 MWe DESCRIPTION OF OCCURRENCE:

On January 21, 1982, during the performance of the M3T maintenance surveillance test, it was discovered that the undervoltage relay on the 2C Vital Bus was actuating at 55.5 volts instead of the 77.3 volt trip setpoint value.

The relay was placed in the tripped condition, and-at 2050 hours0.0237 days <br />0.569 hours <br />0.00339 weeks <br />7.80025e-4 months <br /> Action Statement 3.3.2.a Action 14 was entered.

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

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The undervoltage relay actuated at 55.5 volts instead of the 77.3 volt trip setpoint value.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.3.2.a Action 14 requires:

With the number of operable channels one less than the total number of channels, operation may proceed until performance of the next required channel functional test, provided the inoperable channel is placed in the tripped condition within one hour.

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I

LER 82-05/03L 4

CORRECTIVE ACTION

Due to a similar occurrence with the same relay two months earlier, it was inspected by both the Relay Department and the Energy Lab.

No defects were found.

The relay was recalibrated and tested satisfactorily.

The M3T surveillance test was satisfactorily performed.

At 1040 hours0.012 days <br />0.289 hours <br />0.00172 weeks <br />3.9572e-4 months <br />, January 23, 1982 Action Statement 3.3.2.a was terminated.

FAILURE DATA:

General Electric Co.

Disc-operated Relay IAV-74A Prepared By F.

Dickey kk-V

[/ General Manager -

Salem Operations SORC Meeting No.

82-20