ENS 45218: Difference between revisions
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| event date = 07/21/2009 09:30 EDT | | event date = 07/21/2009 09:30 EDT | ||
| last update date = 07/21/2009 | | last update date = 07/21/2009 | ||
| title = Ability | | title = Ability to Activate Emergency Sirens Temporarily Lost | ||
| event text = At 0930 on 7/21/09, during routine backup diesel generator surveillance testing of the Princeton Radio Tower, the automatic electrical power transfer switch failed in an intermediate position [during] restoration to its normal electrical alignment. The Turkey Point Plant Alert Notification System is located at the Princeton Tower. The failure of the automatic transfer switch in the intermediate position resulted in a temporary loss of power to the Alert Notification System repeaters. The remote telemetry monitoring at the Tower functioned as designed and provided prompt notification of the situation to FPL personnel. An FPL Radio technician was promptly dispatched to assess the condition. The Alert Notification System (redundant activating transmitters) was deemed unavailable during this time. The Princeton Radio Tower electrical power transfer switch was manually positioned to align the Alert Notification System repeaters to their normal power supply at 1035 on 7/21/09, restoring availability. The ability to manually transfer the Alert Notification System repeaters' electrical power supply was not impacted by this failure. The Alert Notification System was tested satisfactory once the system was returned to service. An investigation to determine the failure of the automatic transfer switch is ongoing. | | event text = At 0930 on 7/21/09, during routine backup diesel generator surveillance testing of the Princeton Radio Tower, the automatic electrical power transfer switch failed in an intermediate position [during] restoration to its normal electrical alignment. The Turkey Point Plant Alert Notification System is located at the Princeton Tower. The failure of the automatic transfer switch in the intermediate position resulted in a temporary loss of power to the Alert Notification System repeaters. The remote telemetry monitoring at the Tower functioned as designed and provided prompt notification of the situation to FPL personnel. An FPL Radio technician was promptly dispatched to assess the condition. The Alert Notification System (redundant activating transmitters) was deemed unavailable during this time. The Princeton Radio Tower electrical power transfer switch was manually positioned to align the Alert Notification System repeaters to their normal power supply at 1035 on 7/21/09, restoring availability. The ability to manually transfer the Alert Notification System repeaters' electrical power supply was not impacted by this failure. The Alert Notification System was tested satisfactory once the system was returned to service. An investigation to determine the failure of the automatic transfer switch is ongoing. | ||
The failure of this system is considered a major loss of offsite communications capability and is reportable under 10 CFR 50.72(b)(3)(xiii). | The failure of this system is considered a major loss of offsite communications capability and is reportable under 10 CFR 50.72(b)(3)(xiii). | ||
Latest revision as of 22:11, 1 March 2018
| Where | |
|---|---|
Turkey Point  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+3.2 h0.133 days <br />0.019 weeks <br />0.00438 months <br />) | |
| Opened: | Tim Seilkop 16:42 Jul 21, 2009 |
| NRC Officer: | Bill Huffman |
| Last Updated: | Jul 21, 2009 |
| 45218 - NRC Website
| |