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| Entered date | Event description | |
|---|---|---|
| ENS 48708 | 31 January 2013 09:28:00 | On January 31, 2013, at approximately 0210 hours (EST), the ability to transfer plant parameter data via the Emergency Response Data System (ERDS) was lost. ERDS capability was restored at 0701 hours (EST). The cause is under investigation. In the event of an emergency while ERDS was unavailable, contingency plans were in place to transmit plant parameter data, This event is being reported in accordance with 10 CFR 50.72(b)(3)(xiii), The NRC Resident Inspector has been notified. |
| ENS 48413 | 16 October 2012 19:56:00 | An Unusual Event was declared at 1920 EDT, HU1 - Earthquake felt in the plant (Control Room), and confirmed by calling the Manchester Dispatch Office. Post event walkdowns indicate no reports of damage at the station. Walkdowns of station structures and systems continue. Plant is stable in Mode 5 planned refueling outage. No adverse impacts to shutdown cooling. The station seismic monitor is currently out of service for a scheduled calibration. The licensee is exiting a refueling outage. The earthquake was felt by the site at 1914 EDT. The United States Geological Survey website indicates that an earthquake of magnitude 4.0 centered 3 miles west of Hollis Center, Maine occurred at this time. The licensee is currently in a Train 'B' system outage. All Train 'A' systems are functioning as required. The licensee has notified the NRC Resident Inspector and State authorities. No media or press release is anticipated at this time. The Headquarters Operations Officer has notified other FEDS (FEMA, DHS, DHS NICC and Nuclear SSA via email). * * * UPDATE FROM SEAN RILEY TO PETE SNYDER AT 0212 ON 10/17/12 * * * The Unusual Event was terminated at 0149 EDT. Initiating condition was HU-1 due to the earthquake felt at the plant and confirmed by calling Manchester Dispatch Office. Information obtained by seismic monitoring system confirmed no additional escalation warranted. Site walkdown of key systems revealed no damage from the earthquake. All systems required for the current mode of operation were not adversely affected and remain in operation. The licensee will notify the NRC Resident Inspector. Notified R1DO (Welling), NRR (Bahadur), IRD (Grant) and other FEDS (FEMA, DHS, DHS NICC and Nuclear SSA via email). |