05000272/LER-1981-096, Forwards LER 81-096/01T-0.Detailed Event Analysis Encl

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Forwards LER 81-096/01T-0.Detailed Event Analysis Encl
ML20033B594
Person / Time
Site: Salem PSEG icon.png
Issue date: 11/18/1981
From: Midura H
Public Service Enterprise Group
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20033B595 List:
References
NUDOCS 8112010552
Download: ML20033B594 (3)
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LER-1981-096, Forwards LER 81-096/01T-0.Detailed Event Analysis Encl
Event date:
Report date:
2721981096R00 - NRC Website
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text

O PSEG Public Service Electric and Gas Company P.O. Box 168 Hancocks Bridge, New Jersey 08038 Salem Generating Station November 18, 1981 Mr.

R. C.

Haynes a

jN Director of USNRC f

Office of Inspection and Enforcement Region 1 d

631 Park Avenue p-King of Prussia, Pennsylvania 19406 NOV3 01981-3 l]E-v.s. gna g s,w ost

Dear Mr. Haynes:

i

/ pr Q LICENSE NO. DPR-70

/~

DOCKET NO. 50-272 REPORTABLE OCCURRENCE 81-96/0lT Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1.8.c, we are submitting Licensee Event Report for Reportable Occurrence 81-96/0lT.

This report is required within fourteen (14) days of the occurrence.

Sincerely yours, fb.

I ft H.

J.

Midura General Manager -

Salem Operations CC:

Distribution 8112010552 811118' M'L' PDR ADOCK 05000272 S

PDR j6 3 The Energy People 942189(12 9 )1140

s Report Number:

81-96/01T Report Date:

11-18-81 Occurrence Date:

11-7-81 Facility:

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

Containment Fan Coil Units - Service Water Leaks.

This report was initiated by Incident Report 81-443.

CONDITIONS PRIOR TO OCCURRENCE:

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

On November 7, 1981, during a containment inspection in response to an increase in leakage to the containment sump, an operator discovered service water leaking from the second from top primary coil on No. 11 Containment Fan Coil Unit (CFCU), and from the bottom primary and bottom secondary coils on No. 15 CFCU.

The leaks were immediately isolated upon discovery.

In accordar.ce with NRC IE Bulletin 80-24, the NRC was notified of the Service Water Leak in Contain-ment by telephone, with written confirmation transmitted within the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

At 0345 hours0.00399 days <br />0.0958 hours <br />5.704365e-4 weeks <br />1.312725e-4 months <br />, CFCU Nos. 11 and 15 were declared inoperable and Action Statement 3.6.2.3.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 service water leak was due to leaks in the second from top primary coil on No. 11 CFCU, and the bottom primary and bottom secondary coils on No. 15 CFCU.

LER 81-96/0lT.

e AhALYSIS OF OCCURRENCE:

Technical Specification 3.6.2.3.b requires:

With two groups of the required Containment Cooling Fans inoperable, and both Containment Spray Systems operable, restore at least one group of cooling fans 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 /> and in cold shut-down within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

Restore both above required groups of cooling fans to operable status within 7 days of initial loss 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 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 />.

CORRECTIVE ACTION

The leaks in the bottom primary and bottom secondary cooling coils on No. 15 CFCU were satisfactorily repaired with Belzona metal filler.

The second from top primary coil on No. 11 CFCU was isolated from the remainder of the coils by installing a blank flange insert between the service water inlet and outlet flanges.

As per engineering analysis, it is possible to isolate an individual cooler in this manner while retaining acceptable efficiency of the cooler.

However, in order to maintain the number of blanked-off coils in a unit at no more than three, the top secondary coil on No. 11 CFCU, previously blank flanged, was unblanked and satisfactorily repaired with Belzona metal filler.

No. 11 and No. 15 CFCU were tested satisfactorily and returned to service.

At 1815 hours0.021 days <br />0.504 hours <br />0.003 weeks <br />6.906075e-4 months <br />, November 7, 1981, No. 11 and No. 15 CFCU were declared operable, and Action Statement 3.6.2.3.b was terminated.

These coolers will be replaced during a future outage; however, no supplementary report will be issued.

FAILURE DATA:

Westinghouse Coil Cooler Spin No. RCMECF Prepared By F.

Dickey

& 1@

/

General Manager -

Salem Operations SORC Meeting No.

81-119B

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