ML20073R008
| ML20073R008 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 04/18/1983 |
| From: | Wells R DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, EF2-62624, NUDOCS 8305030369 | |
| Download: ML20073R008 (1) | |
Text
Donald A. Wells V r.get 03,My AvAne e 41 h 237 M' Ecison sEE==
April 18, 1983 EF2-62624 Mr. James G. Keppler, Regional Adninistrator
[Q' Region III
/
U.S. Nuclear Regulatory Ccmnission 799 Roosevcit Road Glen Ellyn, Illinois 60137
Subject:
Report of Potential 10CFR50.55(e) Item on ITE 4160V Breaker Puffer Pisten Shaft (#91)
I
Dear Mr. Keppler:
On March 21, 1983, Detroit Edison's Mr. D. Ferencz, Acting Supervisor - Con-i struction Quality Assurance, telephoned Mr. H. Wescott of NRC Region III to report on a potential problan with ITE 4160V breaker puffer piston shafts at the Fermi 2 site.
A potential pr)blem exists on several ITE 4160V circuit breakers. The plastic puffer piston connecting shafts have developed cracks. Several i
breakers have been examined, and one (1) actual failure was observed. The cracking and failure has occurred at the linkage connecting pin on the shaft. The puffer piston provides a gust of air to the main contact area to extinguish the arc during the open cycle.
Another report on this item, either interhn or final, will be sent when fur-ther infonnation is available. If you have questions concerning this matter, please contact Mr. G.M. Trahey, Assistant Director - Project Quality Assur-ance.
Very truly yours, O.
f A2aauAs.
DAW /DF/pn ec: Mr. Richard DeYoung, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Ccmnission Washington, D.C.
20555 Mr. Bruce Little, Senior Resident Inspector U.S. Nuclear Regulatory Ctanission k
6450 North Dixie Highway Newport, Michigan 48166
?
8305030369 830418 DR ADDCK 05ooo APR 2 7 1983