05000272/LER-1981-111, Forwards LER 81-111/03L-0.Detailed Event Analysis Encl

Forwards LER 81-111/03L-0.Detailed Event Analysis Encl

ML20038D012
Person / Time
Site:	Salem
Issue date:	12/02/1981
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20038D013	List: 05000272/LER-1981-111, Forwards LER 81-111/03L-0.Detailed Event Analysis Encl 05000272/LER-1981-111-03, /03L-0:on 811106,containment Fan Coil Unit 11 Failed to Start in Low Speed Mode After Safety Injection Signal.Caused by Failure of Automatic Trip Shutter on Low Speed Circuit Breaker to Close When Breaker Racked in
References
NUDOCS 8112140340
Download: ML20038D012 (3)

LER-1981-111, Forwards LER 81-111/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2721981111R00 - NRC Website

text

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O PSEG Pub!ic Service Electric and Gas Company P.O. Box 168 Hancocks Bridge, New Jersey 08038 Salem Generating Station December 2, 1981 Mr.

R.

C. Haynes Director of USNRC

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Office of Inspection and Enforcement

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Dear Mr. Haynes:

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<,x LICENSE NO. DPR-70 N'/ O, I,,'

DOCKET NO. 50-272 REPORTABLE OCCURRENCE 81-lll/03L Pursuant to the requirements of Salem Generating Station Unit No.

1, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable occurrence 81-111/03L.

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

Sincerely yours,

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H.

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Midura General Manager -

Salem Operations CC:

Distribution DR D

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Report Number:

81-lll/03L Report Date:

12-2-81 Occurrence Date:

11-6-81 Facility:

Salem Generating Station, Unit 1 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Containment Fan Coil Unit - Inoperable.

This report was initiated by Incident Report 81-450.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 3 - Rx Power 0% - Unit Load 0 MWe DESCRIPTION OF OCCURRENCE:

On November 6, 1981, during recovery actions from an inadvertent safety injection, the No. 11 Containment Fan Coil Unit (CFCU) failed to start in low speed mode in response to a safety injection signal.

The No. 11 CFCU was declared inoperable and Action Statement 3.6.2.3.a was entered at 1411 hours0.0163 days <br />0.392 hours <br />0.00233 weeks <br />5.368855e-4 months <br />.

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

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The reason the No. 11 CFCU did not start was that the automatic trip shutter on the low speed circuit breaker had failed to close when the breaker was racked in by the operator causing the breaker to trip every time it was reset.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.6.2.3.a requires:

With one group of the required containment cooling I

fans inoperable and both Containment Spray Systems operable, restore the inoperable group of cooling fans to operable status within 7 days 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 j

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 I

LER 81-111/03L -

CORRECTIVE ACTION

The automatic trip shutter on the No. 11 CFCU circuit breaker was manually closed and the breaker was tested satisfactorily.

Action Statement 3.6.2.3.a was terminated at 2110 hours0.0244 days <br />0.586 hours <br />0.00349 weeks <br />8.02855e-4 months <br /> on November 6, 1981.

Equipment operators will be advised of correct procedures for verification of breaker operability.

FAILURE DATA:

I.T.E. Co.

Circuit Breaker Model K-600 Prepared By K. Whitcomb

/M 0t[$-

Gener61 Manager -

Salem Operations SORC Meeting No.81-123