ML20069N360
| ML20069N360 | |
| Person / Time | |
|---|---|
| Site: | Zimmer |
| Issue date: | 11/16/1982 |
| From: | Borgmann E CINCINNATI GAS & ELECTRIC CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, QA-2116, NUDOCS 8212020367 | |
| Download: ML20069N360 (2) | |
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<.o THE CINCINNATI GAS & ELECTRIC COMPANY d
CINCINNATI. OHIO 452o1 November 16, 1982 QA-2116 E. A. BoRGM ANN SENIOR VICE PRESIDENT U. S. Nuclesr Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attention:
Mr. J. G. Keppler Regional Administrator RE:
WM. H. ZIMMER NUCLEAR POWER STATION UNIT 1 10CFR50.55(e), ITEM M-62. FAILURE OF FIRE DAMPERS MANUFACTURED BY AIR BALANCE, INC.
DOCKET NO. 50-358, CONSTRUCTION PERMIT NO.
CPPR-88, W.O. #57300, JOB E-5590 FILE NO. NRC-8, M-62 Centlemen:
This letter constitutes an interim report concerning the subject condition, initially reported to the Commission on October 29, 1982, as a potentially reportable deficiency under 10CFR50.55(e).
Fire dampers, manuf actured by Air Balance, Inc., of Chicago, Illinois, and supplied to the Zimmer Project by Waldinger, Young and Bertke Company, principal HVAC contrac-tor, are located in various safety related systems in the plant.
Catalog data for these dampers show "J" hooks joined by a fusible link. This configuration restrains the damper from closing until ambient temperatures reach 160*F when, by design, the link melts and the hooks fall allowing the damper blade to drop, thus, isolating the associated ductwork.
One damper, lVD04YA, located in the Diesel Generator Venti-lation System, was identified in which the fusible link had melted and the hooks latched onto the damper blade, prohibiting proper closure of the damper. This problem is attributed to the fact that the hooks were installed by the manufacturer with the open ends of the hooks pointed upward toward the blade.
8212020367 821116 PDR ADOCK 05000358 S
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Mr. J. G. Keppler Regional Administrator f
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Region III
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November 16, 1982 1
QA-2116
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This concern is under an engineering evaluation to deter j mine the safety significance of possible damper failures calf appropriate corrective action. A follow-up, report will be sub-r, mitted by January 31, 1983.
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We trust the above will be found accepta'b e sin an interim '
report under 10CFR50.55(e).
Very truly yours, s-
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THE CINCINNATI GAS & ELECTRIC COMPANY 6
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By E. A. BORGLWN SENIOR VICE PRESIDENT
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,j CC: NRC Office of Inspection & Enforcement Washington, D.C.
20555 NRC Senior Resident Inspector Attn:
W. F. Christianson 1
Zimmer Project Inspector q-
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