05000272/LER-1981-017, Forwards LER 81-017/03L-0.Detailed Event Analysis Encl

Forwards LER 81-017/03L-0.Detailed Event Analysis Encl

ML18085B129
Person / Time
Site:	Salem
Issue date:	03/25/1981
From:	Uderitz R Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18085B130	List: 05000272/LER-1981-017, Forwards LER 81-017/03L-0.Detailed Event Analysis Encl 05000272/LER-1981-017-03, /03L-0:on 810223,RHR Pump 12 Declared Inoperable to Perform Test Per IE Bulletin 81-01.Caused by Defective Snubber Due to Intermittent Seizing of Balls in Race from Internal Corrosion.Snubber Replaced
References
NUDOCS 8104020597
Download: ML18085B129 (2)

LER-1981-017, Forwards LER 81-017/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2721981017R00 - NRC Website

text

L PS~G Public Service Electric and Gas Company 80 Park Plaza Newark, N.J. 07101 Phone 201/430-7000 Mr. Boyce H. Grier Director of USNRC March 25, 1981 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 81-17/03L 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 81-17/03L.

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

Sincerely yours,

.<=-..,

4?:~~?-

R. A. Uder.itz General Manager -

Nuclear Production

Report Number:

Report Date:

Occurrence Date:

Facility:

81-17/03L March 25, 1981 2/23/81 Salem Generating Station -

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

Failed Snubber on No. 12 RHR Pump CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 -

Rx Power 100% - Unit Load 1130 MW DESCRIPTION OF OCCURRENCE:

During normal operations at 1130 hours0.0131 days <br />0.314 hours <br />0.00187 weeks <br />4.29965e-4 months <br /> on February 23, 1981, the No. 12 RHR Pump was declared inoperable in order to perform Engineer-ing Test DCR No. 1ET1153 IAW NRC Bulletin 81-01, "Surveillance of Mechanical Snubbers".

Action Statement 3.5.2 was entered at this time.

The snubber mounted on the top of the pump motor was found to be defective.

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

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The apparent cause of the snubber failure appears to be the result of internal corrosion that caused intermittent seizing of the balls in the race.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.5.2 requires that 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 />.

CORRECTIVE ACTION

The defective snubber was replaced in kind with one that was tested satisfactory.

The Action Statement was terminated at 1620 hours0.0188 days <br />0.45 hours <br />0.00268 weeks <br />6.1641e-4 months <br /> on February 24, 1981.

FAILURE DATA:

International Nuclear Safeguards Corporation Mechanical Shock and Vibration Arrestor Model MSVA-2 T.T.-4 A.T. -

+ 1-1/2 Prepared By W. J. Steele SORC Meeting No.

81-19 Station