ENS 47138: Difference between revisions
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| event date = 08/10/2011 01:00 CDT | | event date = 08/10/2011 01:00 CDT | ||
| last update date = 08/12/2011 | | last update date = 08/12/2011 | ||
| title = Potential Loss | | title = Potential Loss of Tsc Operability While Performing Planned Maintenance | ||
| event text = A planned maintenance evolution at the Duane Arnold Energy Center (DAEC) will have the potential to remove the plant computer systems (Plant Process Computer, Intranet, and Internet) from service. The TSC would be rendered non-functional with the loss of all computer systems. The replacement and testing of the automatic power transfer relay is expected to de-energize the computer systems for less than 20 minutes at any time. | | event text = A planned maintenance evolution at the Duane Arnold Energy Center (DAEC) will have the potential to remove the plant computer systems (Plant Process Computer, Intranet, and Internet) from service. The TSC would be rendered non-functional with the loss of all computer systems. The replacement and testing of the automatic power transfer relay is expected to de-energize the computer systems for less than 20 minutes at any time. | ||
If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures. Maintenance will be terminated and power will be restored to the plant computer systems. The restoration of power to all computer systems is estimated to take less than one hour. | If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures. Maintenance will be terminated and power will be restored to the plant computer systems. The restoration of power to all computer systems is estimated to take less than one hour. | ||
Latest revision as of 22:06, 1 March 2018
| Where | |
|---|---|
Duane Arnold  Iowa (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | |
| Time - Person (Reporting Time:+-3.9 h-0.163 days <br />-0.0232 weeks <br />-0.00534 months <br />) | |
| Opened: | Jeff Miell 02:06 Aug 10, 2011 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Aug 12, 2011 |
| 47138 - NRC Website
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