05000311/LER-1982-067, Forwards LER 82-067/03L-0.Detailed Event Analysis Encl

Forwards LER 82-067/03L-0.Detailed Event Analysis Encl

ML20062L495
Person / Time
Site:	Salem
Issue date:	08/04/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20062L498	List: 05000311/LER-1982-067, Forwards LER 82-067/03L-0.Detailed Event Analysis Encl 05000311/LER-1982-067-03, /03L-0:on 820720,during Channel Testing,Control Room Operator Discovered That Steam Generator 24 Feedwater Channel 2 Flow Indication Was Operating Erratically.Caused by Failure of Flow Transmitter.Transmitter Replaced
References
NUDOCS 8208190127
Download: ML20062L495 (3)

LER-1982-067, Forwards LER 82-067/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
3111982067R00 - NRC Website

text

f O PSEG Public Service Electric and Gas Company - P.O. Box E Hancocks Bridge, New Jersey 08038 '

Salem Generating Station August 4, 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 82-067/03L 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 82-067/03L.

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

Sincerely yours, 49;>g-s~

H.

J.

Midura General Manager -

Salem Operations ff(jp RH:ks CC:

Distribution

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8208190127 820804 PDR ADOCK 05000311 v

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PDR The Energy People

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Report Number:

82-067/03L Report Date:

08-04-82 Occurrence Date:

07-20-82 Facility:

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

No. 24 Steam Generator Feedwater Channel 2 -

Reactor Trip System - Inoperable.

This report was initiated by Incident Report 82-188.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 1 - Rx Power 82% - Unit Load 890 MWe.

DESCRIPTION OF OCCURRENCE:

On July 20, 1982, during channel testing, the Control Room Operator discovered that No. 24 Steam Generator Feedwater Channel 2 Flow Indication was operating erratically.

At 2230 hours0.0258 days <br />0.619 hours <br />0.00369 weeks <br />8.48515e-4 months <br />, the channel was declared inoperable, placed in a tripped condition, and Limiting Condition for Operation 3.3.1 Action 7 was entered.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The cause of the loss of feedwater flow indication was failure of the flow transmitter.

I ANALYSIS OF OCCURRENCE:

i l

The Steam Generator Feed Flow signal is utilized in the Reactor Trip System.

An excessive Steam /Feedwater Flow Mismatch signal l

coincident with a Low Steam Generator Level signal initiates a l

reactor trip to prevent power operation without a proper heat l

sink.

The trip is redundant to the Steam Generator Water Level Low Low trip.

This function is necessary to insure core thermal j

limits are not exceeded.

Due to operable redundant channels, j

however, no risk to the health or safety of the public was involved.

As such, the occurrence constituted operation in a degraded mode permitted by a Limiting Condition for Operation, i

and is reportable in accordance with Technical Specification l

6.9.1.9.b.

[

LE'R 82-067/03L ANALYSIS OF OCCURRENCE:Limiting Condition for Operation 3.3.1 Action 7 requires:

With the number of operable channels one less than the total number of channels, startup and/or power 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

As noted, No. 24 Steam Generator Channel 2 bistables were placed in the tripped condition at 2230 hours0.0258 days <br />0.619 hours <br />0.00369 weeks <br />8.48515e-4 months <br />, July 20, 1982.

The feedwater flow transmitter was replaced and the new one was calibrated satisfactorily.

At 1017 hours0.0118 days <br />0.283 hours <br />0.00168 weeks <br />3.869685e-4 months <br />, July 21, 1982, the channel was declared operable and Limiting Condition for Operation 3.3.1 Action 7 was terminated.

FAILURE DATA:

A similar occurrence of a malfunction of No. 24 Steam Generator Channel 2 Flow Transmitter occurred on March 4, 1982, as documented in LER 82-018/03L.

At that time the problem was diagnosed at a failed force motor in the flow transmitter.

The transmitter was repaired and calibrated and put back into service.

Fischer and Porter Co.

Differential Pressure Flow Transmitter Model 10B 2495 Prepared By R.

Hell'er

,l!

Mcwd tr General' Manager -

Salem Operations SORC Meeting No.

82-73 l

t l

L l