ML20079H952
| ML20079H952 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 01/06/1984 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-84-256-000 PT21-84-256, PT21-84-256-000, U-66, ULNRC-717, NUDOCS 8401240137 | |
| Download: ML20079H952 (1) | |
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UNION ELECTRIC COM PANY 1908 GRATIOT STREET ST. Louis. MISSOURI maeuma Aoonass:
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- s. o.somsee January 6, 1984
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Mr. James G.
Keppler Regional Administrator U.S.'I4uclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 ULNRC-717
Dear Mr. Keppler:
INTERIM 10CFR50.55 (e)/21 REPORT NO. U-66 CALLAWAY PLANT UNIT 1 On November 23, 1983, Union Electric reported a 10CFR50.55 (e)/21 deficiency to Paul Pelke, NRC Region III.
The deficiency involves the failure of contactor coils in ITE Gould Motor Control Center two-speed starters for Containment Cooling Fan Motors.
The failure involves the slow speed 42S coils, four of which have failed (shorted) after operating for a period between thirty minutes and one hour of service.
Special efforts were made to assure these coil failures were not caused by the mechanical interlock failure reported in Report No. U-65.
Union Electric has requested Bechtel to provide infor-mation on the failure and to determine if a generic problem exists with the contactor coil.
ITE Gould will be contacted to provide information pertinent to the failure.
A final report on this issue is expected to be submitted within 90 days of the date of this letter.
Very truly yours, l/
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Donald F.
Schnell MAC/bjp cc:
J.
E. Konklin, NRC Region III Richard DeYoung, Directar I&E NRC Resident Inspectors. Callaway Plant (2) a Missouri Public Service Commission QL I
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