05000311/LER-1981-125, Forwards LER 81-125/03L-0.Detailed Event Analysis Encl

Forwards LER 81-125/03L-0.Detailed Event Analysis Encl

ML20040B199
Person / Time
Site:	Salem
Issue date:	01/01/1900
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20040B200	List: 05000311/LER-1981-125, Forwards LER 81-125/03L-0.Detailed Event Analysis Encl 05000311/LER-1981-125-03, /03L-0:on 811209,dc Alarm Produced on Auxiliary Alarm Typewriter.Caused by Internal Component Failure in 125-volt Dc Breaker.Breaker Replaced
References
820106-02, 820106-2, NUDOCS 8201250262
Download: ML20040B199 (3)

LER-1981-125, Forwards LER 81-125/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111981125R00 - NRC Website

text

O PSEG PutAc %rece E'ectnc ar d Gas Cortpany P O Box : 68 Hancocks Bridae New Jersey 08038 January 6, 1982 Mr.

R.

C.

Ilaynes

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Director of USNRC

~'h,*.f Office of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

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Dear Mr. Haynes:

cr, A ff

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LICENSE NO. DPR-75 O

~'

DOCKET NO. 50-311

'e REPORTABLE OCCURRENCE 81-125/03L Pursuant to the requirements of Salem Generating Station Unit No.

2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 81-125/03L.

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

Sincerely yours,

+V H.{d.Midura General Manager -

Salem Operations CC:

Distribution O hhdOh PDR Tne Energy Pccpie ff-

Report Number:

81-125/03L Report Date:

01-06-82 Occurrence Date:

12-09-81 Facility:

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

No. 21 Containment Spray Pump - Inoperable.

This report was initiated by Incident Report 81-494.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 70% - Unit Load 790 MWe DESCRIPTION OF OCCURRENCE:

On December 9, 1981 the No. 21 Containment Spray Pump 125 Volt D.C.

alarm was produced on the Auxiliary Alarm Typewriter.

It was verified that the 125 Volt D.C.

power switch was in the ON position.

The control operator attempted to start No. 21 Containment Spray Pump from the control room, unsuccessfully.

At 0400 hours0.00463 days <br />0.111 hours <br />6.613757e-4 weeks <br />1.522e-4 months <br />, No. 21 Containment Spray Pump was declared inoperable and Action Statement 3.6.2.1 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:

Investigation revealed that internal component failure in the 125 Volt D.C.

breaker caused the contacts to open without tripping the external switch.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.6.2.1 requires:

With one containment Spray System inoperable, restore the inoperable spray system 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 />; restore the inoperable spray system to operable status within the next 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be 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 />.

l

LER 81-125/03L

CORRECTIVE ACTION

The 125 Volt D.C. breaker was properly replaced and tested satisfac-torily.

At 1109 hours0.0128 days <br />0.308 hours <br />0.00183 weeks <br />4.219745e-4 months <br />, No. 21 Containment Spray Pump was declared operable and Action Statement 3.6.2.1 was terminated.

During the time No. 21 Containment Spray Pump was inoperable, the plant was adequately protected by Nc. 22 Containment Spray Pump.

FAILURL DATA:

General Electric Co.

125 Volt D.C.

Breaker Catalog No. TP1260TS Prepared By,

F.

Dickey I

AV j//

GeneraY Manager -

v Salem Operations SORC Meeting No.

82-02

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