ENS Event | |
|---|---|
18:01 Aug 23, 2011 | |
| Title | Notification of an Unusual Event Due to a Seismic Event |
| Event Description | At 1401 hrs. EDT on 8/23/11, TMI (Three Mile Island) declared an Unusual Event due to a threshold seismic condition (HU5) earthquake. The earthquake was felt at the plant. No equipment damage has been identified.
No personnel injuries were reported. The licensee has notified the NRC Resident Inspector and state and local authorities.
The Unusual Event declared at 1401 EDT due to the ground motion felt at the site has been terminated at 1730 EDT. Walkdowns have been performed and no equipment damage has been identified. The plant remains in a stable condition at 100% power. Offsite power and diesel generators were verified to be unaffected by the event. The licensee has notified the NRC Resident Inspector and state and local authorities. Notified R1 IRC (Dentil), IRD (Gott), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner). |
| Where | |
|---|---|
Crane  Pennsylvania (NRC Region 1) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.63 h-0.151 days <br />-0.0216 weeks <br />-0.00497 months <br />) | |
| Opened: | Tara Snyder 14:23 Aug 23, 2011 |
| NRC Officer: | Eric Simpson |
| Last Updated: | Aug 23, 2011 |
| 47190 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 514552015-10-06T01:15:0006 October 2015 01:15:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Alert Declaration Due to Fire in the Auxiliary Building ENS 471902011-08-23T18:01:00023 August 2011 18:01:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of an Unusual Event Due to a Seismic Event ENS 437802007-11-13T11:32:00013 November 2007 11:32:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Unexpected Reactor Vessel Water Level Change During a Refueling Outage with Irradiated Fuel in the Core 2015-10-06T01:15:00 | |