05000272/LER-1981-091, Forwards LER 81-091/03L-0.Detailed Event Analysis Encl

Forwards LER 81-091/03L-0.Detailed Event Analysis Encl

ML20011A947
Person / Time
Site:	Salem
Issue date:	10/21/1981
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20011A948	List: 05000272/LER-1981-091, Forwards LER 81-091/03L-0.Detailed Event Analysis Encl 05000272/LER-1981-091-03, /03L-0:on 810929 & 1001,Channel 3 Pressurizer Level Read Higher than Other Channels.Caused by Transmitter Drifting Out of Calibr.Transmitter Recalibr
References
NUDOCS 8111030398
Download: ML20011A947 (3)

LER-1981-091, Forwards LER 81-091/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2721981091R00 - NRC Website

text

m Lif O PSEG Pub!;c Service Electric and Gas Company P.O. Box 168 Hancocks Bridge, New Jersey 08038 Salem Generating Station October 21, 1981 Mr.

R. C. Haynes Director of USNRC

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Office o! Inspection and Enforcement

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631 Park Avenue d

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C NOV0 21981*

Dear Mr. Haynes:

sowument LICENSE NO. DPR-70

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DOCKET NO. 50-272 4

REPORTABLE OCCURRENCE 81-91/03L a

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 81-91/03L.

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

Sincerely yours, jf f ) FIN H.

J.

Midura General-Manager -

Salem Operations CC:

Distribution i

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8111030398 811021 PDR ADOCK 05000272 S

PDR 9s 2isa n2fl4r ife The Energy People

Report Number:

81-91/03L Report Date:

10-21-81 Occurrence Date:

9-29-81 and 10-1-81 Facility:

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

Pressurizer Level Channel 3 - Inoperable.

This report was initiated by Incident Reports81-392 and 81-394.

CONDITIONS PRIOR TO OCCURRENCE:

9-29-81 Mode 1 - Rx Power 97% - Unit Load 1030 MWe 10-1-81 Mode 1 - Rx Power 98% - Unit Load 1040 MWe DESCRIPTION OF OCCURRENCE:

On two separate occasions, September 29, 1981 and October 1, 1981, an operator noticed that the Channel 3 Pressurizer Level was reading higher than the other two channels.

At 0720 and 0835 hours0.00966 days <br />0.232 hours <br />0.00138 weeks <br />3.177175e-4 months <br />, respectively, the channel was declared inoperable, and limiting condition for operation (LCO) 3.3.1.1, Action 7 was entered.

These occurrences constituted operation in a degraded mode in accordance with technical specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The Channel 3 transmitter had drifted out of calibration.

ANALYSIS OF OCCURRENCE:

LCO 3.3.1.1 Action 7 requires:

With the number of operable channels one less than the total number of channels, start-up and/or power operation may proceed until performance of the next required channel functional test provided the in-operable channel is placed in the tripped condition within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

CORRECTIVE ACTION

On both occasions the Channel 3 Pressurizer Level bistable was placed in the tripped condition within one hour.

On September 29 the transmitter was recalibrated, tested satisfactorily, and returned to service.

On October 1 the transmitter was backfilled to renove trapped air, recalibrated, 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 />, September 30, 1981 and 2210 hours0.0256 days <br />0.614 hours <br />0.00365 weeks <br />8.40905e-4 months <br />, October 3, 1981, respectively, LCO 3.3.1.1 Action 7 was terminated.

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LER 81-91/03L

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FAILURE DATA:

'Barton Instrument'Co.

Differential Pressure Transmitter Model 386/351 l:

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Prepared By F.

Dickey

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E Manager - S61em Generating. Station i

SORC Meeting No.

81-109b i

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