ML17301A150
| ML17301A150 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 01/21/1985 |
| From: | Williams J FLORIDA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| L-85-39, NUDOCS 8502210303 | |
| Download: ML17301A150 (2) | |
Text
85JAN29 pP
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FLORIDAPOWER & LIGHTCOMPANY January 21, 1985 L-85-39 Mr. James P. O'Reilly Regional Administrator, Region II U.
S. Nuclear Regulatory Commission Suite 2900 101 Marietta Street, NW
- Atlanta, GA 30323
Dear Mr. O'Reilly:
Re: St. Lucie Unit 2 Docket No. 50-389 Special Report - Diesel Generator The information in this special report is submitted in accordance with Technical Specification 4.8. 1.'1.3 for St. Lucie Unit 2.
j On December 20, 1984, during a surveillance run of the 2B Diesel Generator (D/G) while the plant was shutdown, the operator noted a problem at one of the radiator cooling fans and. stopped the D/G.
The investigation showed that set screws securing the fan hub and its key to the shaft had loosened, the hub was
- loose, and the hub had a circumferential crack.
Since a new fan hub had to be fabricated, a plant change/modification was issued to enhance its design to eliminate the possibility of the set screws coming loose.
The PCM was incorporated on the 2B D/G 12 cylinder engine fans only.
All other fans were checked and found satisfactory for continued use, however, the new hubs are to be installed on the remaining Unit 2 D.G fans as a reliability enhancement.
This is the second problem with the 28 Diesel Generator in the last 100 valid tests.
The 2B D/G was out of service for 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> as a result of this event.
The plant remained shutdown during the period the D/G was out of service.
The current surveillance interval for the St. Lucie Unit 2 Diesel Generators is not more than 7 days in accordance with Regulatory Position C.2.d. of Reg.
Guide 1.108.
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Nr. James P. O'Reilly January 21, 1985 Page 2
Should you or your staff have any questions on this information, please contact us.
Very truly yours, J.
W. Williams, Jr.
Group Vice President Nuclear Energy JWW/PLP/js Attachment cc: Harold F.
Rei s, Esquire P NS-LI-85-040-1