05000324/FIN-2010005-01
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | TS 3.8.1 requires that the EDGs be operable, or if one EDG is inoperable for greater than seven days, then Unit 1 and Unit 2 are required to be placed in mode 3 within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, and mode 4 within the next 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. Contrary to these requirements, on September 12, 2010, EDG #4 was found to have excessive brush sparking. This excessive brush sparking rendered the EDG inoperable. Since EDG #4 was last ran on August 15, 2010, using the t/2 approximation for inoperability time, EDG #4 was inoperable for greater than allowed by TS 3.8.1 with Units 1 and 2 in mode 1. Upon discovery, the licensee cleaned the collector rings and corrected the brush sparking. Longer term corrective actions include replacing the collector rings with a material less susceptible corrosion. The issue was entered into the licensees corrective action program as AR #421264. This finding is of very low significance because the risk analysis inputs of the relatively short exposure time and the licensees estimate of the EDGs ability to run at least six hours prior to failure, along with a model update to reflect changes in the loss of offsite power statistics, resulted in a result that was less than 1E- 6. The finding is Green. |
| Site: | Brunswick  |
|---|---|
| Report | IR 05000324/2010005 Section 4OA7 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Nielsen M Bates G Laska G Johnson R Musser G Kolcum |
| INPO aspect | |
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Finding - Brunswick - IR 05000324/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Brunswick) @ 2010Q4
Self-Identified List (Brunswick)
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