ML20064L273

Final Deficiency Rept 82-02A Re Fusible Links in American Warming & Ventilating,Inc curtain-type Fire Dampers. Initially Reported on 820624.All curtain-type Fire Dampers Will Be Reworked Prior to Fuel Load

ML20064L273
Person / Time
Site:	Braidwood
Issue date:	02/03/1983
From:	Tramm T COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
10CFR-050.55E, 10CFR-50.55E, 5887N, 82-02A, 82-2A, NUDOCS 8302150183
Download: ML20064L273 (2)

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.N Commonwealth ECson f) One First National Pfara. Chicago. Illinois

, V ~) Address R: ply to: Post Office Box 737 Chicago Illinois 60690 February 3, 1983 Mr. James G. Keppler, Regional Administrator Directnrate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Braidwood Station Units 1 and 2 Fusible Links in Curtain Type Fire Dampers NRC-Docket Nos. 50-456-and 50-457 Reference (a): August 3, 1982 letter from T. R. Tramm to J. G. Keppler.

Dear Mr. Keppler:

On June 24, 1982, Commonwealth Edison notified Mr. L.

McGregor of your office of a potential deficiency reportable pursuant to 10 CFR 50.55(e) regarding curtain type fire dampers at Braidwood Station. A similar deficiency was reported at Byron Station on July 1, 1982. The written report on that deficiency was submitted in reference (a). Mention of the Braidwood deficiency was inadvertently omitted from that report but the deficiency is identical. This report is sohmitted to fulfill the requirements for a written report on the Bra.uwood deficiency. For your tracking purposes this deficiency is numbered 82-02A.

Description of-Deficiency The sheet metal contractor, Pullman Sheet Metal Works, Inc. , has been informed by one of their suppliers, American Warming and Ventilating Inc., that certain curtain fire dampers supplied for Braidwood 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 section 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 effective-ness of the fire barriers.

8302150183 830203 PDR ADOCK 05000456 S

d' s e FEB 7 E63 POR

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J. G. Keppler February 3, 1983 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 Warning and Ventilating.

Please address any questions regarding this matter to this office.

Very truly yours,

f. /2,7/w T. R. Tramm Nuclear Licensing Administrator 1m cc: Director of Inspection & Enforcement l

5887N

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