ENS 42400: Difference between revisions
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| event date = 03/09/2006 05:55 EST | | event date = 03/09/2006 05:55 EST | ||
| last update date = 03/09/2006 | | last update date = 03/09/2006 | ||
| title = Technical Specification 3.8.1.1 Entry Due | | title = Technical Specification 3.8.1.1 Entry Due to Loss of Unit 3 Startup Transformer | ||
| event text = While the Unit 3 Startup Transformer was inoperable for planned maintenance, it was discovered that both the 3A and 3B Emergency Diesel Generators were inoperable. The Emergency Diesel Generators were inoperable due to a configuration that resulted in the Emergency Diesel Generators being in the Droop mode versus the Isochronous mode. This configuration was improperly established when offsite power was supplied to Unit 3 via the Main and Auxiliary Transformers (Backfeed). | | event text = While the Unit 3 Startup Transformer was inoperable for planned maintenance, it was discovered that both the 3A and 3B Emergency Diesel Generators were inoperable. The Emergency Diesel Generators were inoperable due to a configuration that resulted in the Emergency Diesel Generators being in the Droop mode versus the Isochronous mode. This configuration was improperly established when offsite power was supplied to Unit 3 via the Main and Auxiliary Transformers (Backfeed). | ||
Upon discovery, jumpers were installed to place both [Unit 3] Emergency Diesel Generators in the proper Isochronous mode correcting this condition at 0615 on March 9, 2006. Unit 4 was identified to be in a condition where one of its required Startup Transformers [from Unit 3] and one of its required Emergency Diesel Generators [from Unit 3] were out of service. Both [Unit 3] Emergency Diesel Generators were restored to an operable condition approximately twenty (20) minutes after discovery. | Upon discovery, jumpers were installed to place both [Unit 3] Emergency Diesel Generators in the proper Isochronous mode correcting this condition at 0615 on March 9, 2006. Unit 4 was identified to be in a condition where one of its required Startup Transformers [from Unit 3] and one of its required Emergency Diesel Generators [from Unit 3] were out of service. Both [Unit 3] Emergency Diesel Generators were restored to an operable condition approximately twenty (20) minutes after discovery. | ||
Latest revision as of 21:19, 1 March 2018
| Where | |
|---|---|
Turkey Point  Florida (NRC Region 2) | |
| Reporting | |
| Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+-1.58 h-0.0658 days <br />-0.0094 weeks <br />-0.00216 months <br />) | |
| Opened: | Michael Murphy 09:20 Mar 9, 2006 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | Mar 9, 2006 |
| 42400 - NRC Website
| |