United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9611060282

ESI

ENGINE SYSTEMS, INC.

1220 South Washington St.
Rocky Mount, NC 27801
Phone: (919) 977-2720
Fax: (919) 446-1134

                                TELEFAX

DATE:          November 4, 1996

COMPANY:       Office of Nuclear Reactor Regulation

FAX NUMBER:    301/415-1887

ATTENTION:     Vern Hodge

REFERENCE:     Report 10CFR21-0074

FROM:          Michael Nuding

Dear Sir:

Attached is our report 10CFR21-0074 for a 10CFR21 reportable defect with
four excitation contactors (EMD #9562575) supplied by ESI to GPU nuclear.
GPU is the only user affected by this notification.

Should you have any questions, please let us know.

Sincerely,

Engine Systems, Inc.

Michael Nuding,
Manager, Quality Assurance

                                             Report No.  10CFR21-0074
                                             NOVEMBER, 4, 1996

                      10CFR21 REPORTING OF DEFECTS
                           AND NON-COMPLIANCE

COMPONENT:     "EXC" Contractor, EMD #9562575

SYSTEM:        EMD MP-45 diesel generator control systems

CONCLUSION:    Defect is Reportable in Accordance with 10CFR21

PREPARED BY:                                           DATE:
               Donald D. Galeazzi
               Engineering Manager

REVIEWED BY:                                           DATE:
               Michael Nuding
               General Manager, Quality Assurance

                                        REPORT NO. 10CFR21-0074
                                        PAGE: 1 OF 2

SUMMARY

Engine Systems, Inc. (ESI) received notification on 10/22/96 from GPU
Nuclear about problems with EMD contractor #9562575.  ESI had further
discussions with GPU (Mr. John Rogers) on 11/4/96.  The problems reported
by GPU are as follows:

1.   A wire jumper was installed between one of the contractor coil
     terminals and one of the contractor auxiliary contact terminals.
     This jumper is normally supplied with the contractor from EMD;
     however, it is not required for the wiring configuration in the GPU
     diesel generator control system.  If left connected on the
     contractor when installed in the GPU control system, a short circuit
     is created in the DC control power supply when the contractor is
     energized (causing the auxiliary contact to close).  This condition
     was present on all four of the contactors supplied by ESI.

2.   The connection of the stationary contact arm on the auxiliary
     contact block was loose.  This condition was present on two of the
     four contactors supplied by ESI.

The contractor is designated "EXC" (excitation contractor) and is
energized to provide excitation to the generator.

COMPONENT

EMD contractor #9562575.

CUSTOMERS AFFECTED:

GPU Nuclear, Oyster Creek is the only user of this contractor is nuclear
safety related service.

DEFECT

1.   A wire jumper was installed between one of the contractor coil
     terminals and one of the contractor auxiliary contact terminals.
     This jumper is normally supplied with the contractor from EMD;
     however, it is not required for the wiring configuration in the GPU
     diesel generator control system.  If left connected on the
     contractor when installed in the GPU control system, a short circuit
     is created in the DC control power supply when the contractor is
     energized (causing the auxiliary contact to close).  This condition
     was present on all four of the contactors supplied by ESI.

2.   The connection of the stationary contact arm on the auxiliary
     contact block was loose.  This condition was present on two of the
     four contactors supplied by ESI.

                                                  REPORT NO. 10CFR21-0074
                                                  PAGE: 2 OF 2

CORRECTIVE ACTION

1.   GPU has removed the jumper and tightened the connection screws of
     the auxiliary contact station arm on all four contactors.

2.   ESI has revised the component dedication report to require removal
     of the jumper and to require checking the auxiliary contact arm
     screws for tightness.

GPU is the only user affected by this notification.  All contactors
supplied to GPU have been corrected; therefore, no further corrective
action is required.

*** END OF DOCUMENT ***

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