05000311/LER-1982-025, Forwards LER 82-025/03L-0.Detailed Event Analysis Encl

Forwards LER 82-025/03L-0.Detailed Event Analysis Encl

ML20071J896
Person / Time
Site:	Salem
Issue date:	04/13/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20071J898	List: 05000311/LER-1982-025, Forwards LER 82-025/03L-0.Detailed Event Analysis Encl 05000311/LER-1982-025-03, /03L-0:on 820402,after Closing RHR Pump 22,pump Supply Breaker Opened Due to Phase a Overcurrent Rendering Pump & Related ECCS Subsystem Inoperable.Cause of Breaker Overcurrent Trip Unknown.Pump Tested Satisfactorily
References
NUDOCS 8204270401
Download: ML20071J896 (3)

LER-1982-025, Forwards LER 82-025/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111982025R00 - NRC Website

text

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Public Service Electric and Gas Company P.O. Box E Hancocks Bridge, New Jersey 08038 Salem Generating Station April 13, 1982 CD O

Mr.

R. C. Ilaynes k)-\\\\

Regional Administrator p

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USNRC Region 1 APR 2 G 1982> 1 631 Park Avenue S-g g,.,,gy,7g King of Prussia, Pennsylvania 19406 t.:Au w.m n 12 Ice M'

Dear Mr. Ilaynes :

f 4 l ro LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-25/03L 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 82-25/03L.

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

Sincerely yours, II.

J.

Midura General Manager -

Salem Operations

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Distribution 82042to%)

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Report Number:

82-25/03L Report Date:

04-13-82 Occurrence Date:

04-02-82 Facility:

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

No. 22 Residual Heat Removal Pump - Overcurrent Trip.

This report was initiated by Incident Report 82-067.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 100% - Unit Load 1150 MWe.

DESCRIPTION OF OCCURRENCE:

On April 2, 1982 the Control Room Operator started No. 22 Residual Heat Removal (RHR) Pump for an operability check.

A few seconds after closing, the pump supply breaker opened due to phase A overcurrent.

At 0105 hours0.00122 days <br />0.0292 hours <br />1.736111e-4 weeks <br />3.99525e-5 months <br /> No. 22ERHR Pump and the related ECCS subsystem were declared inoperable, and Action Statement 3.5.2.d 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:

An investigation of the occurrence revealed no apparent cause for the breaker overcurrent trip.

The pump checked satisfactorily for free rotation and winding resistance-to-ground.

Breaker contact resistance and over-current relay setpoints were satisfactory.

A strip chart re-cording of phase currents during pump operation showed no abnormalities.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.5.2.d requires:

With one ECCS subsystem inoperable, restore the inoperable subsystem 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 hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

- s

LER 82-25/03L.

CORRECTIVE ACTION

No. 22 RHR Pump was satisfactorily tested, and Surveillance Procedure SP4.0.5(P) was satisfactorily performed.

The pump and ECCS subsystem were declared operable at 1525 hours0.0177 days <br />0.424 hours <br />0.00252 weeks <br />5.802625e-4 months <br />, April 2, 1982, and Action Statement 3.5.2.d was terminated.

A program of increased surveillance was instituted for No. 22 RilR pump to extend through the end of this month.

A Supplemental LER will be submitted upon completion.

FAILURE DATA:

Not Applicable.

//h Prepared By R.

Frahm a

Gen 6 ray Manager -

Salem Operations SORC Meeting No.

82-41