ML20198H581
| ML20198H581 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 01/16/1986 |
| From: | Woody C FLORIDA POWER & LIGHT CO. |
| To: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-86-035-000 L-86-17, PT21-86-035-000, PT21-86-35, NUDOCS 8601310057 | |
| Download: ML20198H581 (2) | |
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JAN 1 0 1986 L-86-17 Dr. 3. Nelson Grace Regional Administrator, Region 11 U.S. Nuclear Regulatory Commission Suite 2900 101 Marietta Street, N.W.
Atlanta, Georgia 30323 Dear Dr. Grace Re St. Lucie Unit 2 Docket No. 50-389 Special Report - 2B Diesel Generator Failure The attached special report is being submitted pursuant to the St. Lucie Unit 2 Technical Specification 4.3.1.1.3.
Very truly yours, bt$ku'c-t C.o.Wo Group V' e esident Nuclear nergy Cow /SAViss Attachment Document Control Desk, USNRC, Washington, D.C.
cc:
Harold F. Reis, Esquire.
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0601310057 060116 PDR ADOCK 05000309 S
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e SPECIAl, REPORT PSL 2B Diesel Generator Failure On December 19, 1985, with Unit 2 in Mode 1 at normal full power, the 2B Diesel Generator (D/G) was placed out of service for periodic maintenance. Af ter the periodic maintenance on the air start system was completed, the 2B D/G was started at 1353 hours0.0157 days <br />0.376 hours <br />0.00224 weeks <br />5.148165e-4 months <br /> for an operable test run. The 2B D/G failed the test when it took 13.6 seconds to reach rated speed and voltage. (Technical Specification 4.8.1.1.2 requires f10 seconds). The 2B D/G was secured and Electrical Maintenance was contacted.
At 1603 hours0.0186 days <br />0.445 hours <br />0.00265 weeks <br />6.099415e-4 months <br /> on December 19, the 2B D/G was restarted for troubleshooting. (start time 12.41 seconds). It was discovered that only the 12 cylinder engine of the dual engine D/G was supplying power. Due to a failure of the governor's speed changer motor, the 16 cylinder was not receiving any fuel oil. The speed changer motor was replaced. At 1440 hours0.0167 days <br />0.4 hours <br />0.00238 weeks <br />5.4792e-4 months <br />, December 20, the 2B D/G was again declared operable having successfully completed the operable test run.
This is the second failure of the Unit 2 D/G's in the last 100 valid tests. The Unit remained at normal full power during the 27.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> that the 2B D/G was out of service. The 2A D/G was fully operable during the 2B D/G failure.
The current survellianco interval for St. Lucie Unit 2 is not more than 14 days in accordance with Regulatory Position C.2.d of Reg. Guide 1.103.