ML19327A024
| ML19327A024 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 07/21/1980 |
| From: | Fiorelli G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Hines E DETROIT EDISON CO. |
| References | |
| NUDOCS 8008010071 | |
| Download: ML19327A024 (1) | |
Text
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aten ettyn,ictinois sos 7 301.2t'sso Docket No. 50-341 The Detroit Edison Company ATTN:
Mr. Edward Hines, Assistant Vice President and Manager Quality Assurance 2000 Second Avenue Detroit, MI 48226 Gentlemen:
Thank you for your final report dated July 3,1980, pursuant to 10 CFR 50.55(e) regarding termination to receptacles for main control room panels. We will complete our review of this matter during a future inspection.
Your cooperation with us is appreciated.
Sincerely, fe%g 4A' Gastoit Fiorelli, Chief Reactor Construction and Engineering Support Branch cc: Director, RCI/II Director, AEQD Chief, OEB/MPA IE Files cc w/ltr dtd 7/3/80:
Central Files PDR Local PDR NSIC Ronald Callen, Michigan Public Service Commission Eugene B. Thomas, Jr.,
Attorney 800801067/
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d roco s cona Av.aue July 3, 1980 Ecison tre;tw= ~>-
EF2-49,017 Mr. James C. Keppler Regional Director Directorate of Regulatory Operations g-Ml l
Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road i
Glen Ellyn. Illinois 60137
Subject:
Final Report on 10CFR50.55(e) Item on Terminations to Receptacles for Main Control Room Panels.
Dear Mr. Keppler:
This letter is submitted as Detroit Edison's final report on the 10CFR50.
55(e) item concerning problems with terminations to receptacles in the Main Control Room Panels 601, 602, and 603 at the Fermi 2 Site.
The problem was initially reported by Mr. H.A. Walker of the Detroit Edison Quality Assurance Department, to Mr. P.A. Barrett, of NRC-Region III, dur-ing a NRC On-Site inspection.
It had been noted at that time by Start-Up, that a number of wire connections to the terminations on the receptacles of some G.E. supplied panels appeared to be loose. Subsequent investigation revealed that both the number 23 and number 16 wire used in the panels were involved. In addition to this, a problem was noted in the cutting and breaking of strands in the number 16 wire.
G.E. has completed their investigation and have concluded that retermina-tion of the wires is required to insure proper operation of the panels.
The apparent cause of the problems was improper crimping.
G.E. has pro-cessed a Field Deviation Disposition Request (FDDR), whose disposition authorizes the work required to reterminate the #16 and #20 AWG wire ter-minations on Panels 601, 602 and 603. The procedure for rework is a part of this FDDR and includes qualification tests for operators, and daily calibration inspections of the crimping tools. Pull tests will be per-formed to assure satisfactory crimps. The rework is scheduled to begin on July 7, 1980.
If you have any questions regarding this matter, please contact Mr. H.A.
Walker, Supervisor - Construction Quality Assurance.
Sincerely, Y.
Af.4.,,,s W.
. Fahrner, Manager Enrico Fermi 2 WF/ HAW /pn g { gg j
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.Mr. James C. Keppler July 3, 1980 Page Two EF2-49,017 cc:
Mr. Victor Stello, Jr., Director Office of Inspection and Enforcement Division of Reactor Inspection Programs U.S. Nuclear Regulatory Commission Washington D.C.
20555 Mr. Bruce Little, Resident Inspector U.S. Nuclear Regulatory Commission Resident Inspectors Office 6450 North Dixie Highway Newport, Michigan 48166 I
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