05000311/LER-1982-012, Forwards LER 82-012/03X-1.Detailed Event Analysis Encl

Forwards LER 82-012/03X-1.Detailed Event Analysis Encl

ML20063N935
Person / Time
Site:	Salem
Issue date:	09/22/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20063N936	List: 05000311/LER-1982-012, Forwards LER 82-012/03X-1.Detailed Event Analysis Encl 05000311/LER-1982-012-03, /03X-1:on 820209,steam Generator Level Channel 2 Displayed Erratic Behavior,Indicating Drift.Apparently Caused by Intermittent Ground on Signal Lead.Ground Eliminated by Lifting Leads While Troubleshooting Problem
References
NUDOCS 8210070371
Download: ML20063N935 (3)

LER-1982-012, Forwards LER 82-012/03X-1.Detailed Event Analysis Encl

Event date:
Report date:
3111982012R00 - NRC Website

text

_ _ _ _ - _ _ _ _

'O PSEG Public Service Electric and Gas Company P.O. Box E Hancocks Bridge. New Jersey 08038 Salem Generating Station September 22, 1982 Mr.

R. C. Haynes Regional Administrator USNRC Region 1

- 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Haynes:

LICENSE NO. DPR-75 DOCKET NO. 50-311 REPORTABLE OCCURRENCE 82-012/03X-1 SUPPLEMENTAL REPORT Pursuant to the requirements of Salem Generating Station Unit No. 2 Technical Specifications, Section 6.9.1.9.b, we are submitting supplemental Licensee Event Report for Reportable Occurrence 82-012/03X-1.

Sincerely yours, l

5t<f5 H.

J. Midura General Manager -

Salem Operations RF:ks

//

CC:

Distribution

'iMi10070371 820922~

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PDR ADOCK 05000311 di-PDR The Energy People g*

05 2189 (20tA) 1181

we Report Number:

82-012/03X-1 Report Date:

09-22-82 Occurrence Date:

02-09-82 Facility:

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

No. 21 Steam Generator Level Channel 2 - Inoperable.

This report was initiated by Incident Report 82-032.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 96% - Unit Load 1090 MWe DESCRIPTION OF OCCURRENCE:

At 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br />, February 9, 1982, No. 21 Steam Generator Level Channel 2 displayed erratic behavior, rapidly drifting high to 65%, causing feed flow to drop, dropping actual level to 30%.

The operator immediately switched the feed regulator valve to manual control and regained proper steam generator level.

Channel 2 drifted back to normal.

A strip recorder was hooked up to the channel and noise discovered on the signal lead.. The problem was assumed to be in the transmitter, and it was isolated in preparation for replacement.

The channel was declared in-operable, and at 2310 hours0.0267 days <br />0.642 hours <br />0.00382 weeks <br />8.78955e-4 months <br />, Limiting Condition for Operation-3.3.1 Action 7 was entered.

This occurrence constituted ope 2 stion in a degraded mode in' accordance with Technical Specification 6.9.1.9.b.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The transmitter was replaced, but the noise persisted.

During further investigation for the source of the noise, the signal lead shields were alternately lif ted at the terminal strip junction between the transmitter and instrument.

In both cases, the noise was eliminated by lifting the lead.

The problem re-appeared shortly after. replacing the lead to the. transmitter;.

the noise was permanently eliminated when the lead to the_instru-ment was replaced.

The problem was therefore assumed to involve-an intermittant ground on the signal. lead at the terminal strip; lifting and replacing the shield connections during troubleshooting apparently' eliminated the-problem..

...r

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r LER 82-012/03X-1==.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.3.1 Action 7 requires:

With the number of operable channels one less than the total number of channels, startup and/or operation may proceed until performance of the next required channel functional test provided the inoperable channel is placed in the tripped condition within one hour.

CORRECTIVE ACTION

The channel bistable was placed in the tripped condition within one hour.

With the noise eliminated, the channel was returned to operation, recalibrated and satisfactorily tested.

No. 21 Steam Generator Level Channel 2 was declared operable at 0131 hours0.00152 days <br />0.0364 hours <br />2.166005e-4 weeks <br />4.98455e-5 months <br />, February 10, 1982, and Action Statement 3.3.1 Action 7 was terminated.

FAILURE DATA:

Not Applicable Prepared By R.

Frahm

/

$W Gener61 Manager -

SORC Meeting No.

82-85 kl