ML20134F574
| ML20134F574 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/04/1996 |
| From: | Galeazzi D, Nuding M AFFILIATION NOT ASSIGNED |
| To: | Hodge V NRC |
| References | |
| REF-PT21-96 NUDOCS 9611060282 | |
| Download: ML20134F574 (4) | |
Text
..
Fax:9194461134 Nov 4 '96 17:48 P.01 M2 /3 qE$I BNGINE SYSTEMS,INC.
jJ=~]
l 1220 South Washington St.
Rocky Mount, NC 27801
%_h,.5 $1..-
1 Phone: (919)977-2720
- i i
Fax:
(919)446-1134 f
lg - 41996 )
I i
l TELEFAX j"'
)
DATE:
November 4,1996 i
COMPANY:
Office of Nuclear Reactor Regulation l
FAXNUMBER:
301/415-1887 i
ATTENTION:
Vern Hodge
REFERENCE:
Report 10CFR21-0074 FROM:
MichaelNuding Dear Sir.
Attached is our report 10CFR21-0074 for a 10CFR21 icpereble 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.
l m..ek, a{,\\.J, Michael Nuding, 3
Manager, Quality Assurance 9611060 yooh19
()
PDR A
PDR 4
~l
Fax:9194461134 Nov 4 '96 17:48 P.02 l
~
Report No.10CFR21-0074 NOVEMBER,4,1996
- i a
10CFR21 REPORTING OF DEFECTS l
AND NON-COMPLIANCE COMPONENT: "EXC" Contactor, EMD #9562575 SYSTEM:
EMD MP-45 diesel generator control systems CONCLUSION: Defect is Reportable in Accordance with 10CFR21 i
s a
5 2
5 PREPARED BY:
- ,b
- M' DATE:
Donald D. Gpl6azzi Engineering' Manager REVIEWED BY:
//A L s / / d DATE:
/m y / 99 <,
Michael Nuding
/
General Manager, Quality Assurance
._m.
i Fax:9194461134 tbv 4 '96 17:49 P.03 1
a REPORT NO.10CFR21-0074 l
PAGE: 10F 2 i
SUMMARY
l I
i Engine Systems, Inc. (ESl) received notification on 10/22/96 from GPU Nuclear about i
problems with EMD contactor #9562575. ESI had further discussions with GPU (Mr.
l John Rogers) on 11/4/96. The problems reported by GPU are as follows:
- 1. A wire jumper was installed between one of the contactor coil terminals and one of the contactor auxiliary contact terminals. This jumper is normally supplied with the l
contactor from EMD; however, it is not required for the wiring configuration in the j
GPU diesel generator control system. If left connected on the contactor when i
installed in the GPU control system, a short circuit is created in the DC control i
power supply when the contactor is energized (causing the auxiliary contact to close). This condition was present on all four of the contactors supplied by ESI.
l
- 2. The connection of the stationary contact arm on the auxiliary contact block was
{
loose. This condition was present on two of the four contactoss supplied by ESI.
I The contactor is designated "EXC" (excitation contactor) and is energized to provide excitation to the generator.
1 I
l COMPONENT EMD contactor #9562575.
CUSTOMERS AFFECTED.
i l
GPU Nuclear, Oyster Creek is the only user of this contactor is nuclear safety related i
service.
4 i
DEFECT i
i
- 1. A wire jumper was installed between one of the contactor coil terminals and one of the contactor auxiliary contact terminals. This jumper is normally supplied with the contactor from EMD; however, it is not required for the wiring configuration in the GPU diesel generator control system. If left connected on the contactor when installed in the GPU control system, a short circuit is created in the DC control power supply when the contactor is energized (causing the auxiliary contact to j
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.
4 I
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.