05000250/FIN-2010004-02
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Technical Specification 3.8.1.1.b requires restoration of an inoperable diesel generator to operable status within 14 days or be in at least hot standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Contrary to the above, during the period July 28, 2009 thru August 12, 2009, a period in excess of 14 days, the Unit 4 B emergency diesel generator was inoperable because of a faulty fuel strainer and Unit 4 was not placed in hot standby as required. When identified by the licensee during a surveillance test, the licensee entered the issue in the corrective action program as CR 2009-13740 and corrected the condition by replacing the entire fuel strainer assembly. A regional Senior Reactor Analyst performed a Phase III evaluation under the Significance Determination Process. The dominant internal events accident sequence was a single unit loss of offsite power followed by the common cause failure of all the emergency diesel generators with a failure to recover offsite power or an emergency diesel generator before core damage two hours later. Assumptions of the evaluation included that common cause would be considered and, recovery of the failed diesel generator would not be considered. The exposure time for the evaluation was 14.3 days. Based upon this evaluation the performance deficiency was characterized as a finding of very low safety significance (Green). Further corrective actions to modify the strainer were planned. |
| Site: | Turkey Point  |
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| Report | IR 05000250/2010004 Section 4OA7 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | C Fletcher R Chou R Carrion W Rogers M Barillas S Stewart D Rich |
| INPO aspect | |
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Finding - Turkey Point - IR 05000250/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Turkey Point) @ 2010Q3
Self-Identified List (Turkey Point)
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