ENS 44945: Difference between revisions
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| event date = 03/30/2009 18:43 EDT | | event date = 03/30/2009 18:43 EDT | ||
| last update date = 03/31/2009 | | last update date = 03/31/2009 | ||
| title = Emergency Response Data System (Erds) Out | | title = Emergency Response Data System (Erds) Out of Service | ||
| event text = On March 30, 2009, at approximately 1843 hours EDT, the control room reported a loss of power to non-safety 480 volt busses F1C and F1D. Initial investigation revealed an instantaneous ground over-current (50G) relay had actuated. This relay actuation resulted in the supply breaker tripping and all associated loads being de-energized. This resulted in a loss of 120 VAC non-essential electrical power to a portion of the Emergency Response Data System (ERDS). | | event text = On March 30, 2009, at approximately 1843 hours EDT, the control room reported a loss of power to non-safety 480 volt busses F1C and F1D. Initial investigation revealed an instantaneous ground over-current (50G) relay had actuated. This relay actuation resulted in the supply breaker tripping and all associated loads being de-energized. This resulted in a loss of 120 VAC non-essential electrical power to a portion of the Emergency Response Data System (ERDS). | ||
In the event of an emergency, plant parameter data will be orally transmitted to the facilities through the status Board Ring Down circuit with back-up by the Private Branch Exchange, Off Premise Exchange, and various redundant intra-facility circuits throughout the emergency facilities. The ability to open and maintain an open line using the Emergency Notification System will not be affected and will be the primary means of transferring plant data to the NRC as a contingency until the ERDS can be returned to service during the period of unavailability. | In the event of an emergency, plant parameter data will be orally transmitted to the facilities through the status Board Ring Down circuit with back-up by the Private Branch Exchange, Off Premise Exchange, and various redundant intra-facility circuits throughout the emergency facilities. The ability to open and maintain an open line using the Emergency Notification System will not be affected and will be the primary means of transferring plant data to the NRC as a contingency until the ERDS can be returned to service during the period of unavailability. | ||
Latest revision as of 22:12, 1 March 2018
| Where | |
|---|---|
Perry  Ohio (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+0.35 h0.0146 days <br />0.00208 weeks <br />4.7943e-4 months <br />) | |
| Opened: | Tom Stec 23:04 Mar 30, 2009 |
| NRC Officer: | Joe O'Hara |
| Last Updated: | Mar 31, 2009 |
| 44945 - NRC Website
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