05000272/LER-1981-003, Forwards LER 81-003/03L-0

Forwards LER 81-003/03L-0

ML18085A788
Person / Time
Site:	Salem
Issue date:	02/05/1981
From:	Uderitz R Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18085A789	List: 05000272/LER-1981-003, Forwards LER 81-003/03L-0 05000272/LER-1981-003-03, /03L-0:on 810109,component Cooling Water Heat Exchanger 12 Removed from Svc.Caused by Repair of Leaking Pipe Nipple at Weld Connecting Svc Water Drain Valve 12SW124 W/Heat Exchanger Tube Sheet.Nipple Replaced & Weld Reworked
References
NUDOCS 8102100624
Download: ML18085A788 (2)

LER-1981-003, Forwards LER 81-003/03L-0

Event date:
Report date:
2721981003R00 - NRC Website

text

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Public Service Electric and Gas Company 80 Park Place Newark. N.J. 07101 Phone 201430-7000

• Mr. Boyce H. Grier Director of USNRC February 5, 1991 Off ice of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 81-03/03L Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 81-03/03L.

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

~ CC:

Sincerely yours,

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R. A. Uderi?z General Manager -

Nuclear Production Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies)

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Report Number:

81-03/03L Report Date:

February 5, 1981 Occurrence Date:

1/09/81 Facility:

Salem Generating Station, Unit l Public Service Electric & Gas company Hancocks Bridge, NJ 08038 IDENTIFICATION OF OCCURRENCE:*

Loss of No. 12 Component Cooling Loop CONDITIONS PRIOR TO OCCURRENCE:

Model -

Rx Power 96%

~Unit Load 1100 MW.

Valve 12 SW124 was tagged out at 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> January 9, *1981 DESCRIPTION OF OCCURRENCE:

During normal operations at 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br /> ori January 9, 1981, Service Water Valve l2SW124 (Drain Valve on No. 12. CCWHX) was tagged out for a leaking connecting nipple.

At 0800 hours0.00926 days <br />0.222 hours <br />0.00132 weeks <br />3.044e-4 months <br />, the No. 12 CCWHX was tagged out of service leaving only one Component Cooling Water Loop operable.

Action Statement 3.7.3.l was* entered at this time.

IAW Technical Specifications, at least two loops must be restored to operable.status within 7 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or the reactor must be in at least the hot standby mode 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 />.

This occurrence resulted irt operation in* a. degraded* mode IAW Technical Specification 6. 9. l. 9. b.

DESIGNATION OF. APPARENT CAUSE OF OCCURRENCE:.

The weld between the Heat Exchanger Tube Sheet *and the'connecting nipple for Valve l2SW124 had failed.

ANALYSIS.OF OCCURRENCE:

The Heat Exchanger Tube Sheet is made of Monel metal. *The nipple is carbon steel.

The leak was found to be at the weld bonding these dissimilar metals.

CORRECTIVE ACTION

The original.nipple was replaced and the welded connection completely r*eworked.

The original valve was reinstalled.

A Design Change Request has been initiated which will replace the carbon steei nipple with one made of Monel metal which will allow a better fusion of the weld.

The Action Statement was terminated at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> on January.11, 1981.

FAILURE DATA:

Not Applicable Prepared By W. J. Steele Manager - *Sale Gen~rating Station SORC Meeting No.

81-05

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