ML20043G764

Part 21 Rept Re Potential Defect W/Speed Transmitter in Diesel Engine Control Panel of Dsrv Standby Diesel Generator.Estimate of Completion of Corrective Actions Not Possible,Since Correction Made by Other Companies

ML20043G764
Person / Time
Site:	Mcguire, Catawba, Grand Gulf, McGuire
Issue date:	05/22/1990
From:	Guntrum B COOPER BESSEMER CORP.
To:	NRC
References
REF-PT21-90 NUDOCS 9006210103
Download: ML20043G764 (2)

Text

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, hDb b L

r ENERGY SERVICES GROUP azzi  !

May 22, 1990

' Director, Office of Inspection & Enforcement

, U. S. NUCLEAR REGULhTORY COMMISSION .l Washington, D. C. 20553

Reference:

Report #153

Dear Sir:

W In accordance with_the requirements of Title 10, Chapter 10, Code of Federal Regulations, Part 21, Cooper Industries, Inc.,

Enterprise Engine Services, hereby notifies the Commission of a.

i potential defect in a component of a DSRV Standby Diesel Generator. There exists a potential problem with the speed transmitter in the Diesel Engine Control Panel.

Cooper Industries has supplied DSRV engines with this potential defect to System Energy Resources, Inc., Grand Gulf Nuclear

-Stationi engine model DSRV-16-4, engine serial numbers 74033 add 74034.

1 The subject speed transmitter senses engine speed from an engine mounted magnetic pickup and transfers that intelligence into control system commands at predetermined engine speeds. This transmitter provides the specific primary commands of field flash to the Static' Exciter Voltage Regulator and ready to load signal to'the load sequencer.

Failure of the speed transmitter to operate as designed will (

result in a loss of generator voltage output and an inability to  ;

auto-load-the generator. The failure mode is a passive one with no visible evidence of failure in a standby engine condition.

This speed transmitter is manufactured by Dynalco and was supplied to SERI by Cooper Industries on a retroactive' basis'for components no longer manufactured. The Cooper Industries part number is F-594-065-05.

Duke ~ power notified Cooper Industries in March 1990 of a potential misapplication of this same speed transmitter relative to their installation and the output contacts voltage rating.

.-Based on'this inquiry, Cooper Industries performed individual functional cycle tests that, tG the best of our knowledge, simulated site applications for both' Duke Power and SERI.

ENTERPRISE ENGINE SERVICES O Box 16 San Leandro, CA 94577 PDC ,

(415)' 614 74 @ Fax: (415) 614-7409

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In summary, the test results showed that the speed transmitter operated satisfactorily for the Overspeed Protection Circuitry at Duke Power; though our results did indicate a' limited cycle life under accelerated test conditions.

The test results for SERI, however, reveal that the load of the control devices described in paragraph 3 of this letter, caused an inability of the transmitter to operate within the full specified voltage range.

Cooper Industries recommends that SERI not install these transmitters if not already installed. We further recommend that SERI perform a functional test to verify suitable operation within their specified voltage range. It is important to duplicate the as-installed circuitry in the control panel. A failure to operate will require immediate replacement with a qualified component.

For the application at Duke Power, Cooper Industries will respond.

separately to their specific inquiry.

Since action is to be performed by others, we cannot estimate when corrective action will be completed.

A copy of this letter will be forwarded to the affected sites, as indicated by the copyholders list below.

Our evaluation of this matter was concluded on May 21, 1990.

Since 1y, t

. Bru . Guntrum Manager, Quality Assurance BCG/dp ENERGY SERVICES GROUP e ,

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cc: Duke Power Company l P. O. Box 33189 \

Charlotte, NC 28242 Attn: Mr. W. T. Robertson, JR. \

V. P. Procurement, Services & Materials l System Energy Resources, Inc.

P. O. Box 756 Port Gibson, MS 39150 Attn: Mr. C. R. Hutchinson .

General Manager, SERI j P. O. Box 429 _{

Port Gibson, MS 39150 1 Attn: Mr. Fred Titus Nuclear Plant Engineering ,

P. O.' Box-31995 ,

Echelon One 1340 Echelon Parkway Jackson, MS 39286-1995 Attn: Mr. T. H. Cloninger V. P. Nuclear Engineering & Support ENERGY SERVICES GROUP wem .

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