ML20079H952

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Interim Part 21 & Deficiency Rept U-66 Re Failure of Coils in Ite Gould Motor Control Ctr two-speed Starters for Containment Cooling Fan Motors.Util Awaits Bechtel Info on Failure.Final Rept Expected within 90 Days
ML20079H952
Person / Time
Site: Callaway Ameren icon.png
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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. . . . . . . January 6, 1984 = r 'au ' = "'=u a i = = ' **

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/ b?

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 8401240137 840106 )\

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