Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
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 ***
