Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 50956 | 5 April 2015 19:37:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Alert Declared Due to Fire in Motor Control Center | An Alert was declared due to a fire in a Unit 2 Division 2 Safeguard (250 volt) DC Motor Control Center. This has made the High Pressure Core Injection system inoperable and unavailable. The fire is out. The emergency response organization has been activated and investigation / repair planning will commence. Unit 2 is stable with no other system affects. The fire was extinguished by on-site personnel. No off-site responders were required. The Reactor Core Isolation Cooling system remains operable. A Fire Watch has been stationed to monitor for fire reflash. There were no injuries resulting from this event. There was no effect on Unit 1. The licensee notified the NRC Resident Inspector and State and local government agencies. Notified the following organizations: DHS SWO, DOE Ops Center, FEMA Ops Center, HHS Ops Center, NICC Watch Officer, USDA Ops Center, EPA EOC, FDA EOC, FEMA NWC, and Nuclear SSA.
The Alert was terminated at 1742 EDT. The licensee notified the NRC Resident Inspector and State and local government agencies. Notified R1DO (Kennedy), IRD (Gott), and NRR EO (Morris). Notified the following organizations: DHS SWO, DOE Ops Center, FEMA Ops Center, HHS Ops Center, NICC Watch Officer, USDA Ops Center, EPA EOC, FDA EOC, FEMA NWC, and Nuclear SSA. | Reactor Core Isolation Cooling | |
| ENS 48117 | 18 July 2012 12:15:00 | 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to Flashover in the Load Center Transformer Cabinet | An electrical transformer fault occurred resulting in a loss of both Recirc Pumps. The reactor was manually scrammed from 100% power as required by Plant Procedure OT-112. The electrical transformer was walked down by Operations supervisor. Licensee's assessment was that a flashover occurred, and was confined to the load center transformer cabinet. Based on observed damage, EAL declaration of HU3 was made. HU3 is identified as an explosion within the Protected Area. The licensee has notified the NRC Resident Inspector. Licensee also notified state, local and other government agencies. Notified other agencies (DHS SWO, FEMA, DHS NICC)
Limerick, Unit 1 is terminating from their Unusual Event (HU3) due to the initiating event and conditions no longer being present. The 124A Fault was isolated by the trip of the designed protection features (feeder breaker trip). A walkdown of the area/equipment was completed with no adverse conditions noted. Normal plant shutdown activities are in progress. The area/equipment is quarantined for investigation. The licensee will be issuing a press release. Notified other agencies (DHS SWO, FEMA, DHS NICC) The licensee has notified the NRC Resident Inspector. Notified R1DO (Dimitriadis) and NRR EO (Davis) | 05000352/LER-2012-005 | |
| ENS 47303 | 29 September 2011 15:35:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Notification of Unusual Event Declared Due to Chemical Spill | EAL HU7 was declared at 1135 hrs. (EDT) for a toxic of flammable gas which has been released onsite which could affect plant operations. Current plant conditions do not threaten public safety. Less than 1 gallon of 15% sodium hypochlorite sprayed onto the floor during securing of a completed delivery to the water treatment plant, located within the Protected Area boundary. There have been no injuries to personnel. The licensee has notified the local and state authorities and will be notifying the NRC Resident Inspector.
Limerick is terminating from the Unusual Event (HU7) due to the threat of toxic gas having been terminated. The sodium hypochlorite leak in the water treatment plant has been stopped and clean up activities are in progress. U1 and U2 remain at 100% power. There were no injuries. The licensee has notified state and local authorities and will be notifying the NRC Resident Inspector. Notified R1DO (Doerflein), IRD (Gott), NRR (Thomas), FEMA (O'Connell) and DHS (Flinter). | ||
| ENS 47185 | 23 August 2011 18:15:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Notification of an Unusual Event Due to a Seismic Event | Seismic event occurred resulting in a Notification of an Unusual Event. No plant impact to either unit. Both units are stable with safety systems functional. There were no personnel injuries and no reports of structural damage. The licensee has notified the NRC Resident Inspector.
Limerick is terminating from the Unusual Event (HU5) based on the conditions that originally presented entry to the Unusual Event (HU5) no longer exist and it is unlikely that plant conditions will deteriorate. No emergency conditions exist at this time for either unit. Both Unit 1 and Unit 2 are operating at 100% power and are stable. A walk down of the facility has been completed with no deficiencies identified. No indication of system degradation has been detected. The licensee has notified the NRC Resident Inspector and has notified state and local authorities. Notified R1 IRC (Dentil), IRD (Gott), DHS (Bean), FEMA (Via), USDA (Kraus), and DOE (Turner). | ||
| ENS 40444 | 14 January 2004 00:21:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration | Unusual Event Declared Due to Explosion within Protected Area Boundary | Explosion occurred in a non-safety related transformer at 1908 EST 0n 01/13/04. The transformer became deenergized as a result of the explosion. Licensee declared an Unusual Event at 1921 EST on 01/13/04 due to an explosion resulting in visible damage to a non-safety related transformer in the Turbine Enclosure building. There was no fire or injured personnel, and the site did not require any off site assistance. The transformer explosion resulted in the loss of power to some 480 VAC non-safety related loads (most significant was a non-safeguard DC battery charger). The explosion has not severely impacted Unit 1 operations. The transformer has been inspected, and it appears that the explosion was internal to the transformer and due to an electrical malfunction. Security personnel conducted thorough walk downs of all areas and had no concerns. NRC Management determined that this event did not require entry into the Monitoring Phase of Normal Mode of Incident Response at 2040 on 01/13/04. The licensee notified the state and local emergency management agencies and notified the NRC Resident Inspector.
Notification of reduction in classification status from Unusual Event. Failure of non-safeguards electrical supply determined to be due to cable fault. Plant remains stable at 100% power. No additional equipment damage identified. Blocking and repair planning in progress. The unusual event was terminated by the licensee at 2151 hrs. EST on 1/13/04. The licensee has notified the NRC Resident Inspector and State and County authorities. A media press release will be issued in the morning. Notified DHS (Beal) and FEMA (Caldwell). |