05000311/LER-1981-068, Forwards LER 81-068/03L-0.Detailed Event Analysis Encl

Forwards LER 81-068/03L-0.Detailed Event Analysis Encl

ML20030C997
Person / Time
Site:	Salem
Issue date:	08/19/1981
From:	Uderitz R Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20030C998	List: 05000311/LER-1981-068, Forwards LER 81-068/03L-0.Detailed Event Analysis Encl 05000311/LER-1981-068-03, /03L-0:on 810720,individual Rod Position Indicator & Control Rod Blank Demand Indicator for Rod 2D3 Found in Disagreement by Greater than Plus or Minus 12 Steps.Caused by Equipment Failure.Equipment Recalibr & Returned to Sv
References
NUDOCS 8108310252
Download: ML20030C997 (3)

LER-1981-068, Forwards LER 81-068/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111981068R00 - NRC Website

text

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O PSEG Public Service Electric and Gas Company 80 P:rk Plaza Newark, N.J. 07101 Phone 201/430-7000 August 19, ?.981 Mr. Boyce H.

Grier Director of USNRC Office of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 81-68/03L 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 81-68/03L.

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

Sincerely yours, ff)UYLEtb] f-R. A.

Uderint General Manager -

Nuclear Production CC:

Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Q

Information and Program Control (3 copies)

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I Report Number:

81-68/03L Report Date:

August 19, 1981 Occurrence Date:

7-20-81 Facility:

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

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Individual Rod Position Indication - 2D3 - Inoperable.

This report was initiated by Incident Report 81-266.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 48% - Unit Load 450 MWe DESCRIPTION OF OCCURRENCE:

On July 20, 1981, the control operator noticed that the individual rod position indicator and control rod bank demand indicator for rod 2D3 were in disagreement by greater then + 12 steps.

The individual rod position indicator was declarel inoperable at 1800 hours0.0208 days <br />0.5 hours <br />0.00298 weeks <br />6.849e-4 months <br /> and action statement 3.1.3.2.1 was enteted.

This occurrence constituted operation in a degraded mode in accordance with technical specification 6.9.1.9.b.

DESIGNATION OF AFPARENT CAUSE OF OCCURRENCE:

Equipment failure. The individual rod position indicator (IRPI) for control rod 2D3 was not in agreement with the control rod bank demand j

position due to drift in the calibration of the IRPI and the signal conditioning module.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.1.3.2.1 requires that in modes 1 and 2 with l

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 8ahours.

F LER 81-68/03L 8/19/81

CORRECTIVE ACTION

The IRPI and signal conditioning module for control rod 2D3 were recalibrated satisfactorily and returned to service.

Action state-ment 3.1.3.2.1 was terminated at 1445 hours0.0167 days <br />0.401 hours <br />0.00239 weeks <br />5.498225e-4 months <br />, July 21, 1981.

FAILURE DATA:

Magnetics, Inc.

Signal Conditioning Module Type E2786 Bailey Instrument Co.,

Inc.

Bailey Edgewise Indicator Model RY2 Prepared By F.

Dickey

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bt Manager - Salem' Generating Station SORC Meeting No.

81-77 i

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