ML20062G468
| ML20062G468 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 08/03/1982 |
| From: | Tramm T COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 4647N, NUDOCS 8208130027 | |
| Download: ML20062G468 (2) | |
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N Commonwealth Edison
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v sg Chicago, tMinois 60690 August 3, 1982 Mr. James G. Keppler, Regional. Administrator Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137
Subject:
Byron Station Units 1 and 2 Fusible Links in Curtain Type Fire Dampers NRC Docket Nos. 50-454 and 50-455
Dear Mr. Keppler:
On July 1, 1982, Commonwealth Edison notified Mr. D. W.
Hayes of your office of a potential deficiency reportable pursuant to 10 CFR 50.55(e) regarding curtain type fire dampers at Byron Station.
For yot.it tracking purposes this deficiency is numbered 82-03.
This letter fulfills the 30-day reporting requirement.
Description of Deficiency Our sheet metal contractor, Reliable Sheet Metal Works, Inc., has been informed by one of their suppliers, American Warming and Ventilating Inc., that certain curtain fire dampers supplied for Byron may not close when the fusible link separates.
These dampers were shipped from American Warming and Ventilating between July 6, 1979 and March 24, 1981.
They have type "C" fusible links which have been formed into a channel cross sectin with the legs of the channel being about 900 to the main body of the fusible link.
When the link separates, the blade stack does not always fall into place.
Analysis of Safety Implications These dampers are installed to prevent the spread of fire through the ventilating ducts.
The deficiency reduces the effectiveness of the fice barriers.
Corrective Action Taken All curtain type fire dampers with "C" type fusible-links will be reworked prior to fuel load.. The links will be. replaced and the support straps reworked in accordance with the instructions supplied by the manufacturer, American Warming and Ventilating.
8208130027 820803 PDR ADOCK 05000454 S
PDR 4627
c..
J. G. Keppler August 3, 1982 Please address any questions regarding this matter to this office.
Very--truly yours, ke /4 "
T. R. Tramm
' Nuclear Licensing Administrator lm cc:
Director of Inspection & Enforcement
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