05000311/LER-1981-108, Forwards LER 81-108/03L-0.Detailed Event Analysis Encl

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Forwards LER 81-108/03L-0.Detailed Event Analysis Encl
ML20032D548
Person / Time
Site: Salem PSEG icon.png
Issue date: 11/06/1981
From: Midura H
Public Service Enterprise Group
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20032D549 List:
References
NUDOCS 8111170245
Download: ML20032D548 (3)
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LER-1981-108, Forwards LER 81-108/03L-0.Detailed Event Analysis Encl
Event date:
Report date:
3111981108R00 - NRC Website
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text

-O PSEG Pabhc Service Electri>c md Gas Compar,y P.O. Box 168 Hancocks Bridge, New Jersey 08038 Salem Generating Station gkl N

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NOV161981*g November 6,-1981 ' (8) gegena, (y

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's/ t Mr. R. C. Haynes Director of USNRC Office of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE-81-108/03L 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 81-108/03L.

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

Sincerely yours,

,/,

thNW H.

J. Midura General Manager -

Salem Operations CC:

Distribution

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e Report Number:

81-108/03L Report Date:

11-6-81 Occurrence Date:

10-9-81 Facility:

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

Individual Rod Position Indicators - 2Cl and 2D2 - Inoperable.

This report was initiated by Incident Reports81-404 and 81-405.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 76% - Unit Load 840 MWe DESCRIPTION OF OCCURRENCE:

On October 9, 1981 the operator noticed that Individual Rod Position Indicator (IRPI) for Rod 2Cl was pegged high.

At 1715 hours0.0198 days <br />0.476 hours <br />0.00284 weeks <br />6.525575e-4 months <br />, IRPI 2Cl was declared inoperable and Action Statement 3.1.3.2.1.a was entered.

On the same date, after IRPI 2Cl was repaired and declared operable, the IRPI and Control Rod Bank Demand Indicator for Rod 2D2 were in disagreement by greater than + 12 steps.

At 2109 hours0.0244 days <br />0.586 hours <br />0.00349 weeks <br />8.024745e-4 months <br />, October 9, 1981, IRPI 2D2 was declared inoper-able and Action Statement 3.1.3.2.1.a 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:

IRPI 2Cl had a failed operational amplifier in the Rod Position Indicator.

IRPI 2D2 required a hot calibration with new input data to bring it in specification.

4ER.81-108/03L.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.1.3.2.1 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 />.

CORRECTIVE ACTION

The. operational amplifier in the Rod Position Indicator for.

IRPI 2Cl was replaced and IRPI 2Cl was tested satisfactorily.

At 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br />, October 9, 1981, IRPI 2Cl was declared operable and Action Statement 3.1.3.2.1.a was termineted.

The Rod Position Indicator and Signal' Conditioning Module

- for IRPI 2D2 were recalibrated, but IRPI 2D2 indication would not come into specification.

Flux mapping was performed to verify-rod position, and a hot calibration was performed using new-input data.

IRPI 2D2 was tested satisfactorily, and at 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, October 16, 1981, it was declared operable l

and-Action Statement 3.1.3.2.1.a was terminated.

FAILURE DATA:

Bailey Instrument Co.,

Inc.

Bailey Edgewise Indicator Model RY2 Operational Amplifier LM-307H Magnetics, Inc.

Signal Conditioning Module Type E2786 Prepared By F.

Dickey

/

h Wd General Manager -

Salem Operations SORC Meeting No.81-115 1

d 0.

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