05000311/LER-1981-120, Forwards LER 81-120/03L-0.Detailed Event Analysis Encl

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Forwards LER 81-120/03L-0.Detailed Event Analysis Encl
ML20039B599
Person / Time
Site: Salem PSEG icon.png
Issue date: 12/11/1981
From: Midura H
Public Service Enterprise Group
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20039B600 List:
References
NUDOCS 8112230289
Download: ML20039B599 (3)
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LER-1981-120, Forwards LER 81-120/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3111981120R00 - NRC Website
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text

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~

O PSEG Public Service Electric and Gas Company P.O. Box #160 Ha.ry3cks Bridge, New Jersey 06033 1

December 11, 1981

~ Mr.

R. C.

Haynes 9

Director of USNRC 4

office of Inspection and Enforcement

/, s JRegion 1 O

RECEl'/EN W, \\

631 Park Avenue

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King of Prussia, Pennsylvania 19406 2

DEC 2 21981>,1 O.I$j$% $8[jfd,

Dear Mr. Haynes:

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/,\\' 7 f'N LICENSE NO. DPR-75 r-TW DOCKET NO. 50-311 REPOPTABLE OCCURRENCE 81-120/03L Pursuant to the requirements of Salem Generating Station Unit No.

2, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 81-120/03L.

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

Sincerely yours, l

,17bl4-H.

J. Midura General Manager -

Salem Operations CC:

Distribution O

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fDR S

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The Energy People

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e memai m n

Report Number:

81-120/03L Report Date:

12-11-81 Occurrence Date:

11-13-81 Facilitv:

Salem Generating Station, Unit 2 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Solid State Protection System - Train B - Logic Failure.

This report was initiated by Incident Report 81-458.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 100% - Unit Load 1150 MWe DESCRIPTION OF OCCURRENCE:

On November 13, 1981, while performing a surveillance test on the Solid State Protection System, Train B, the logic system for the reactor coolant loop flow failed the logic test.

At 1105 hours0.0128 days <br />0.307 hours <br />0.00183 weeks <br />4.204525e-4 months <br />, Train B was declared inoperable and Action Statements 3.3.1 Action 1 and 3.3.2.b Action 13 were 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:

The cause of the logic test failure was the failure of an A303 universal circuit board.

Since this particular circuit was not called upon to perform its intended function prior to the surveillance test, it is assumed the circuit was inoperabir; however, the reactor was adequately protected by Train A.

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LER 81-120/03L ANALYSIS OF OCCURRENCE:

Technical Specification 3.3.1 Action 1 requires:

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With the number of channels operable one-less than're-l quired by the minimum channels operable requirement, be in hot standby within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />; however, one channel may be bypassed for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing

.per' specification 4.3.1.1 provided the other channel is.

operable.

Technical Specification 3.3.2 b Action 13 requires:

l With the number of operable channels.one less than the total number of channels, be in at least hot standby within 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 />; however, one channel may be bypassed for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing per specification 4.3.2.1 provided the other channel is operable.

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CORRECTIVE ACTION

The failed A303 universal circuit board was replaced and tested satisfactorily.

Train B surveillance test was satisfactorily performed, and at 1118 hours0.0129 days <br />0.311 hours <br />0.00185 weeks <br />4.25399e-4 months <br /> Action Statements 3.3.1 Action 1 and 3.3.2.b Action 13 were terminated.

This was an electronic failure and not repetitive in nature.

l FAILURE DATA:

Westinghouse Electric Corporation l

Universal Circuit Board A303 Prepared By F.

Dickey

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V

(

Generdl Mahager -

l alem Operations SORC Meeting No.81-126 l

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