ML19254B322
| ML19254B322 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 09/12/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Koester G KANSAS GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7909270312 | |
| Download: ML19254B322 (1) | |
Text
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o UNITED STATES O 'f na[c,]o p
NUCLEAR REGULATORY COMMISSION
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September 12, 1979 In Reply Refer To:
RIV Docket No.
STN 50-482/IE Bulletin No. 79-23 Kansas Gas & Electric Co.
Atta:
Mr. Glenn L. Koester Vice President-Operations Post Office Box 208 Wichita, Kansas 67201 Gentlemen:
Enclosed is IE Bulletin 79-23 which requires action by you with regard to your power reactor facility with an operating license or a construction permit.
Should you have questions regarding this IE Bulletin or the actions required of you, please contact this office.
Sincerely, Wed$;b '
Karl V. Seyfrit Director
/
Enclosuree:
1.
List of IE Bulletins Issued in the Last Six Months cc: w/ enclosures Messrs. Nicholas A. Petrick, SNUPPS D. T. McPhee, Kansas City Power and Light Company Gerald Charnoff, Shaw, Pittman, Potts & Trowbridge E. W. Creel, Kansas Gas and Electric Company 1046 058 7909270}
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-23 Date:
September 12, 1979 Page I of 3 POTENTIAL FAILURE OF EMERGENCY DIESEL GENERATOR FIELD EXCITER TRANSFORMER Description of Circumstances:
Florida Power and Light Company recently reported a problem encountered during a 24-hour full load test of the emergency diesel generators (EDG) at their Turkey Point facility.
Approximately 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> into the test, the A-EDG tripped due to a differential-relay lockout on B and C phases; the B-EDG uas manually stopped, thus interrupting the test at that point in time.
Subsequent investigation and testing by the licensee revealed a design error on both the A and B EDGs which resulted in overheating of the Exciter Power Transforr.ers (EPTs) at sustained high load operation.
The following nameplate data applies to the equipment installed o? Turkey Point:
Emergency Diesel Generator General Motors (Electro-Motive Division)
Model EMD-999-20 Engine-turbocharged, 2 cycle, EMD design 20-645E4 Generatar-EMD-design Model A-20 Exciter Power Transformer GE-single phase Model-9T24Y1004 Serial-MD Cycles-60 KVA 15 Insulation-4160 V The manufacturer's findings and recommendations regarding the above problem are described below:
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"A potential problem can exist if the the primary windings of the excitatioi DUPLICATE DOCUMENT to as the control power transformer (t Entire document previously entered into system under:
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