ML19253C960
| ML19253C960 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 12/07/1979 |
| From: | Fahrner W DETROIT EDISON CO. |
| To: | |
| References | |
| EF2-50-657, NUDOCS 7912120437 | |
| Download: ML19253C960 (1) | |
Text
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Detroit Ecison FEE!=-
December 7, 1979 EF2-50,657 Mr. James C. Keppler Regional Director Directorate of Regulatory Operations Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Subj ect: Report of 10CFR50.55(e) Item on Closure Springs for Fire Dampers
Dear Mr. Keppler:
On November 8,1979, Detroit Edison's Site Project Quality Assurance Engineer, Mr. H. A. Walker, submitted a telephone report to Mr. F. J. Jablonski regarding Closure Springs for Fire Dampers installed in the Reactor Building HVAC System at the Fermi 2 Site.
These springs were manufactured by the Vulcan Company and were supplied to Detroit Edison by Air Balance Incorporated.
Some of the springs have been failing for no apparent reason. The failures could prevent isolation of the Reactor Building Control Room from a fire started external to the control room.
A. review is presently being conducted by Detroit Edison to determine whether this type of Closure Spring is installed in other areas at the Site. Edison's Engineering Research Department is conducting metallurgical tests to determine the reason for the failures. A final report will be submitted to the NRC by April 7, 1980.
If you have any questions on this matter, please contact our Site Project Quality Assurance Engineer.
Sincerely, ML W. J. Fahrner Project Manager Enrico Fermi 2 cc:
Mr. John G. Davis Acting Director Office of Inspection and Enforcement Division of Reactor Inspection Programs k }h 2 U.S. Nuclear Regulatory Commission Washington D.C. 20555
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