05000282/FIN-2009003-11
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Technical Specification 3.8.3.D states that the emergency diesel generators shall be declared inoperable immediately if the stored diesel generator fuel oil supply for Unit 2 is less than 65,000 gallons. Technical Specification 3.8.1.E states that if both emergency diesel generators are inoperable, one emergency diesel generator must be returned to an operable status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. Technical Specification 3.8.1.F states that if one emergency diesel generator cannot be returned to an operable status within two hours, the reactor must be placed in Mode 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in Mode 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. Contrary to the above, between February 16, 2009, and February 18, 2009, the licensee failed to declare the D6 EDG inoperable when the stored diesel generator fuel oil supply dropped below 65,000 gallons. Although the licensee had removed the D5 EDG from service for maintenance, they were unaware that the clearance order activities associated with this maintenance had resulted in rendering the D6 EDG inoperable. Because the condition of the D6 EDG was not known, the licensee failed to return an EDG to an operable status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />. In addition, actions were not taken to place Unit 2 in Mode 3 and Mode 5 as required by the TSs. The licensee initiated CAP 1169735 to document this issue and submitted LER 05000306/09-001. The finding was determined to be of very low safety significance due to the short amount of time that both of the EDGs were inoperable and because the probability of an external flood in mid-February was extremely low. Corrective actions included returning the D6 EDG to an operable status, revising the clearance order tagging sheet, providing additional oversight for complicated electrical clearance orders, and providing additional electrical print reading training to selected operations personnel |
| Site: | Prairie Island  |
|---|---|
| Report | IR 05000282/2009003 Section 4OA7 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | D Betancourt J Giessner J Neurauter K Stoedter M Phalen P Zurawski R Jones |
| INPO aspect | |
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Finding - Prairie Island - IR 05000282/2009003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Prairie Island) @ 2009Q2
Self-Identified List (Prairie Island)
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