05000311/LER-1981-121, Forwards LER 81-121/03L-0.Detailed Event Analysis Encl

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Forwards LER 81-121/03L-0.Detailed Event Analysis Encl
ML20039C069
Person / Time
Site: Salem 
Issue date: 12/16/1981
From: Midura H
Public Service Enterprise Group
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20039C070 List:
References
NUDOCS 8112280373
Download: ML20039C069 (3)
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LER-1981-121, Forwards LER 81-121/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3111981121R00 - NRC Website
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Pubhc Serwce E;ectric and Gas Company P O Box #168 Hancocks Bndge. New Jersey 08038 December 16, 1981 4)

Mr.

R.

C.

Haynes Director of USNRC D

Office of Inspection and Enforcement RECEFED Region 1 g'

DEC 2419815 4 eg 631 Park Avenue

( u emr;mr en King of Prussia, Pennsylvania 19406

f wm vaan a b

Dear Mr. Haynes:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 81-121/03L Pursuant to the requirements of Salem Generating Station Unit No.

2, Techni;al f'ecifications, Section 6.9.1.9.b, we are submitting Licer.saa Event Report for Reportable Occurrence 81-121/03L.

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

Sincerely yours,

}l ll'e h

  • Ltd H.

J.

Midura General Manager -

Salem Operations CC:

Distribu'. ion

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??S?[3egghyy SL \\

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The Energy People

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PDR w na mn

Report Number:

81-121/03L Report Date:

12-16-81 Occurrence Date:

11-18-81 Facility:

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

Individual Rod Position Indication - 2SB2 - Inoperable.

This report was initiated by Incident Reports81-466 and 81-467.

CONDITIONS PRIOR TO OCCURRENCE:

11-18-81 Mode 1 - Rx Power 86% - Unit Load 1000 MWe 11-19-81 Mode 1 - Rx Power 91% - Unit Load 1040 MWe DESCRIPTION OF OCCURRENCE:

On two occasions, November 18 and November 19, 1981, the Control Operator noticed that the Individual Rod Position Indicator (IRPI) and Control Rod Bank Demand Indicator for rod 2SB2 were in dis-agreement by greater than + 12 steps.

The Individual Rod Position Indicator was declared inoperable at 0815 and 0050 hours5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br />, respectively, and Action Statement 3.1.3.2.1.a 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.

On November 18 the cause of the disagreement between the IRPI and the demand indicator was that the meter movement in the IRPI had drifted out of calibration.

The cause of the disagreement on November 19 was that the meter movement had failed.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.3.2.1.a requires that in modes 1 and 2 with a maximum of one rod position indicator per bank inoperable either:

1.

Determine the position of the non-indicating rod (s) indirectly by the movable incore detectors at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> and immediately after any motion of the non-indicating rod which exceeds 24 steps in one direction since the last determination of the rod's position, or 2.

Reduce thermal power to less than 50% of rated thermal power within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

LER 81-121/03L

CORRECTIVE ACTION

On November 18 the meter movement in the IRPI for control rod 2SB2 was recalibrated, tested satisfactorily, and returned to service.

On November 19 the meter movement was replaced, recalibrated, tested satisfactorily, and returned to service.

The IRPI was declared operable, and at 1320 and 0415 hours0.0048 days <br />0.115 hours <br />6.861772e-4 weeks <br />1.579075e-4 months <br />, respectively, Action Statement 3.1.3.2.1.a was terminated.

FAihURE DATA:

Bailey Instrument Co.,

Inc.

Bailey Edgewise Indicator Model RY2 Meter Movement Prepared By F.

Dickey

/

e General Manager -

Salem Operations SORC Meeting No.81-127 4

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