ML19282B878
| ML19282B878 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 02/07/1979 |
| From: | Reed C COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| NUDOCS 7903160298 | |
| Download: ML19282B878 (2) | |
Text
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Commonwealth Edison s
One First National Plata. Chicago Iltinois f
Address Reply to Post Office Box 767 Chicago. Ilonois 60690 February 7, 1979
'Mr. James G.
Keppler, Director Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137
Subject:
Quad-Cities Unit 1 Response to IE Bulletin No. 78-05 NRC Docket No. 50-254 Reference (a):
C.
Reed letter to J. G. Keppler dated May 25, 1978
Dear Mr. Keppler:
Reference (a) stated that the G.E. Model CR 105X auxiliary contact devices located at various safety-related 480V motor control centers would be replaced by the end of the next refueling outage for Quad-cities Unit 1.
As a result of procurement, quality assurance, and manpower problems, it is doubtful that these CR 105X devices on Unit 1 safety-related motor control cencers will be replaced during the Unit 1 refueling outage, which began on January 17, 1979.
These devices will be scheduled for replacement at the next refueling outage, currently scheduled for Fall 1980.
To date, none of the CR 105X auxiliary contact mechanisms installed on any 480V motor control centers at Quad-cities have experienced a binding problem of the plunger arm.
No failures have occurred attributable to problems with these devices, and no corrective maintenance has been deemed necessary.
For these reasons, we believe that accelerated replacement of these devices is not warranted.
The existing surveillance test program is adequate to detect the failure of a CR 105X device should it occur.
If a failure is discovered, the device will be promptly replaced and the overall replacement schedule will be re-evaluated.
01979 790316089I
Commonwealth Edison NRC Docket No. 5v-254 Mr. James G. Keppler: February 7, 1979 s
Please address any questions concerning this matter to this office.
Very truly yours, I
Cordell Reed Assistant Vice-President cc:
Director Office cf Inspection and Enforcement