Semantic search
| Entered date | Event description | |
|---|---|---|
| ENS 43653 | 20 September 2007 14:46:00 | (The information below concerns a) September 19, 2007 NPDES Reportable Occurrence verbiage/Notification to the Ohio Environmental Protection Agency. This notification was made on September 20, 2007. Time of discharge is unknown. Cloudy water was discovered in 'Major Stream' diversion (also referred to as 'Red Mill Run') at approximately 1525 hours on September 19, 2007. The amount of discharge is unknown. At the time of discovery, approximately 10 to 15 gallons of water, per minute, were observed discharging from the storm drain. On September 20, 2007, the observed discharge from the storm drain was approximately 1 to 2 gallons of water per minute. The pH of the stream was 11.2 standard units (SU) at 1650 hours on September 19, 2007 with white powdery deposition on the stream bed. At 1000 hours on September 20, 2007, a sample taken for pH indicated 8.48 SU. A number of small stressed fish were observed at time of discovery, along with approximately 5 to 10 small dead fish. No frogs, crayfish, or other local aquatic life forms were observed to have been negatively impacted. Initial analysis of the sediment from the stream bed indicated the main constituents were inorganic calcium & oxygen (possible materials include but not limited to calcium oxide, calcium carbonate, calcium hydroxide). The source of the high pH and white sediment is unknown at this time and an investigation is in progress. The affected area (has been inspected) and recommendations for clean-up remediation (provided). The recommendations are currently being evaluated. This event is being reported in accordance with Appendix B to the Operating License (The Environmental Protection Plan) which requires reporting of any occurrence of an unusual or important event that indicates or could result in significant environmental impact causally related to plant operation (An example includes 'fish kills'). This event is also being reported in accordance with 10CFR50.72(b)(2)(xi). 'Any event or situation, related to the health and safety of the public or on-site personnel, or protection of the environment, for which a news release is planned or notification to other government agencies has been or will be made. Such an event may include an on-site facility or inadvertent release of radioactively contaminated materials'. The NRC Resident Inspector and applicable State authorities have been notified. |
| ENS 44945 | 30 March 2009 23:04:00 | 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. This event is being reported in accordance with 10 CFR 50.72(b)(3)(xiii) as a condition that results in a major loss of emergency offsite communications capability. A follow-up notification will be made when the equipment is restored. The NRC Resident Inspector has been notified." The unit is currently defueled.
Last evening, power was restored to ERDS following maintenance. ERDS is capable of performing its intended function. Notified R3DO(Orth) |