05000311/LER-1981-097, Forwards LER 81-097/03L-0.Detailed Event Analysis Encl

Forwards LER 81-097/03L-0.Detailed Event Analysis Encl

ML20031B849
Person / Time
Site:	Salem
Issue date:	09/28/1981
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20031B850	List: 05000311/LER-1981-097, Forwards LER 81-097/03L-0.Detailed Event Analysis Encl 05000311/LER-1981-097-03, /03L-0:on 810901,operator Found Individual Rod Position & Control Rod Bank Indicator for Rod 2D2 in Disagreement by Greater than 12 Steps.Caused by Calibr Drift of Position Indicator.Position Indicator Recalibr
References
NUDOCS 8110060148
Download: ML20031B849 (3)

LER-1981-097, Forwards LER 81-097/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111981097R00 - NRC Website

text

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m O PSEG Public Service Electric and Gas Company P.O. Box 168 Hancocks Bridge, New Jersey 08038 Salem Generating Statim September 28, 1981 y-1

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Mr.

R.

C.

Haynes i

L Director of U.3NRC Of fice of Inspection and E'1forcement g

00 g jggjp '~g Region 1 631 Fark Avenue mL King of Prussia, Pennsylvania 19406 N

Dear Mr. Haynss:

4 LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 81-97/03L 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 81-97/03L.

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

Sincerely yours,

/.

k wf IU J. Midura Manager - Salem Generating Station CC:

R. A.

Uferitz General Manager - Nuclear Production Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies) f seh 8110060148 810928 The Energy People gDRADOCK05000g 9s2is9 02wn t eo

O Report Number:

81-97/03L Report Date:

9-28-81 Occurrence Cate:

9-1-81 Facility:

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

Individual Rod Position Indication - 2D2 - Inoperable.

This r9 port was initiated by incident Report 81-356.

CONDITIONS PRIOR TO CCCURRENCE:

Mode 1 - Rx Power 50% - Unit Load 550 MWe DESCRIPTION OF OCCURRENCE:

On September 1, 1981, the control operator noticed that the individual rod position indicator and control rod bank demand indicator for rod 2D2 were in disagreement by greater than + 12 steps.

The individual rod position indicator was declared inoperable at 1940 hours0.0225 days <br />0.539 hours <br />0.00321 weeks <br />7.3817e-4 months <br /> and action statement 3.1.3.2.1 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. The individua. rod position indicator (IRPI) for control rod 2D2 was not in agreement with the control rod bank demand position due to drift in the calibration of the position indicator.

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 />.

(

• LER 81-97/03L J

CORRECTIVE ACTION

The position indicator for control rod 2D2 was recalibrated satis-factorily and returned to service.

Action statement 3.1.3.2.1 was terminated at 2002 hours0.0232 days <br />0.556 hours <br />0.00331 weeks <br />7.61761e-4 months <br />, September 1, 1981.

FAILURE DATA:

Bailey Instrument Co, Inc.

i Bailey Edgewise Indicator

?

Model RY2 Prepared By F.

Dickey

/- /.

//

Manager - Salem-Generating Station D

SORC Meeting No.

81-98 i

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