Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 56745 | 19 September 2023 01:07:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification | The following information was provided by the licensee via email: On 9/18/2023 at 2007 CDT, Clinton reported to the Illinois Emergency Management Agency, National Response Center and DeWitt County a hazardous substance release of 1300 gallons of Sodium Bisulphite. The release was at the site's flume discharge building due to a crack on a fitting inside the building. This release did not exceed any NRC regulations or reporting criteria. This notification is being made solely as a four-hour, non-emergency notification for a Notification of Other Government Agency. This event is reportable in accordance with 10 CFR 50.72(b)(2)(xi). There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. | ||
| ENS 48377 | 4 October 2012 18:01:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Inadvertent Activation of All Emergency Sirens | At 1301 (CDT) on October 4, 2012, during the restoration of a single Farmer City owned siren, DeWitt County Emergency Dispatch Center inadvertently activated all of Clinton Power Station's emergency sirens instead of the Farmer City owned siren. A siren in the Farmer City area had fallen off a pole, and following repairs, instead of testing the individual siren, the Dispatch Center inadvertently actuated all 40 Clinton Power Station sirens. The sirens were actuated for approximately 1 minute and 14 seconds. The Clinton Power Station siren system covers parts of four surrounding counties (DeWitt, Piatt, McLean, and Macon). A spurious actuation of one or more emergency response sirens is reportable under 10CFR50.72(b)(2)(xi) addressing a notification of a government agency related to the health and safety of the public. The NRC Resident Inspector has been notified. All of the affected county Emergency Management Agencies have been notified. The DeWitt County Sheriff has notified various media outlets. | ||
| ENS 44267 | 4 June 2008 23:11:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Flood Watch | On June 4, 2008 at 18:11 hours, Clinton Lake level reached 694 feet 0 inches (mean sea level). Normal lake level is 690 feet 0 inches. Per Clinton Power Station (CPS) procedure 4303.02, 'Abnormal Lake Level,' the CPS Main Dam - Emergency Action Plan requires that a 'Flood Watch' be declared. This resulted in a notification to the DeWitt County Sheriff's Department that occurred at 18:14 hours. Lake level continues to slowly rise due to the heavy rains received in the area for the past several days. Expected peak is approximately (694 feet 6 inches). Mitigating measures are currently being instituted as a precautionary measure in the screen house, per CPS procedures. The licensee notified the NRC Resident Inspector.
The licensee has terminated their flood watch at 0900 CDT. The licensee will notify the NRC Resident Inspector and has notified the DeWitt County Sheriff. Notified the R3DO (Lipa). | ||
| ENS 44162 | 23 April 2008 17:08:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Assistance Requested Due to Utility Pole Fire Outside the Protected Area | On April 23. 2008 at 1150, Clinton Power Station (CPS) Main Control Room received notification from a site employee that a utility pole on the 138 KV line North of the main parking lot was on fire. Ameren/IP was contacted. At 1155, Ameren/IP de-energized the 138kV line. Offsite assistance was requested from the Local Fire Department at time 1206. At time 1256, the offsite Fire Department extinguished the fire. Clinton Power Station remained online at full electrical load during the event and remains stable. Repairs are in progress, with an expected completion this evening. The NRC Resident Inspector has been informed. | ||
| ENS 43964 | 6 February 2008 17:33:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Flood Watch Due to Snow Melt and Heavy Rain | On February 6, 2008 at 1119 hours, Clinton Lake level reached 694 feet 0 inches (mean sea level). Normal lake level is 690 feet 0 inches. Per Clinton Power Station (CPS) procedure 4303.02, 'Abnormal Lake Level,' the CPS Main Dam - Emergency Action Plan requires that a 'Flood Watch' be declared. This resulted in a notification to the DeWitt County Sheriff's Department that occurred at 1133 hours. Lake level continues to slowly rise due to the melting snow and heavy rains received in the area for the past several days. Expected peak is approximately 694 feet 6 inches. Mitigating measures are currently being instituted as a precautionary measure in the screen house, per CPS procedures. The NRC Resident has been notified. High lake level only affects the plant intake structure.
On February 8, 2008 at 1655 hours, Clinton Lake level reached 693 ft-0 inches (mean sea level). Clinton Power Station (CPS) Procedure 4303.02, 'Abnormal Lake Level', and the CPS Main Dam - Emergency Action Plan allow termination of the 'Flood Watch.' This resulted in a notification to the DeWitt County Sheriff's Department that occurred on February 8, 2008 at 2043 hours when the Offnormal procedure was exited. Maximum lake level observed was 694 ft-4 inches (mean sea level). Lake level is currently 692 ft-6 inches (mean sea level) and lowering. Inspections have identified no damage due to the heavy rainfall or associated elevated lake level. The licensee informed the NRC Resident Inspector. Notified R3DO (Tom Kozak). | ||
| ENS 41797 | 26 June 2005 01:42:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Assistance Requested Due to Switchyard Circuit Breaker Failure | On June 25, 2005 at 2042, Clinton Power Station received indications of loss of the Reserve Auxiliary Transformer (RAT). Upon investigation, it was discovered that Gas Circuit Breaker (GCB) 4522 had suffered catastrophic failure resulting in a lockout of the North Bus, which supplies the RAT. Offsite assistance was requested, as a precautionary measure, from the Local Law Enforcement Agency, Medical, and Fire Departments. The onsite Operations Fire Brigade extinguished the fire in the GCB 4522. Clinton Power Station remained online at full electrical load during the event and is stable. Restoration and recovery is now in progress. The NRC Resident Inspector has been informed. The licensee stated that local law enforcement (Dewitt County Sheriff) departed the site at 2130 CDT and that nothing of a suspicious nature was found. The incident is considered to be solely the result of a component failure. | ||
| ENS 41331 | 13 January 2005 17:30:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Flood Watch | The following information was provided by the licensee via facsimile. On January 13, 2005, at 1300 (CST) hours, Clinton Lake level reached 694 feet - 0 inches (mean sea level). Normal lake level is 690 feet - 0 inches. Per Clinton Power Station (CPS) procedure 4303.02, "Abnormal Lake Level." the CPS Main Dam - Emergency Action Plan requires that a "Flood Watch" be declared. This resulted in a notification to the DeWitt County Sheriff's Department that occurred at 1218 hours. A four-hour notification to the NRC is required due to the notification of an offsite government agency. (Reference 10CFR50.72(b)(2)(xi)). At 1235, the lake level was 694 feet - 3 inches and continuing to rise due to the heavy rains received in the area for the past several hours. Sandbagging has begun as a precautionary measure in the screen house, per CPS procedures. The licensee notified the NRC Resident Inspector.
The following information was provided by the licensee via facsimile: On January 15, 2005 at 1115 hours, Clinton Lake level reached normal lake level of 694 feet- 0 inches (mean sea level). Per Clinton Power Station (CPS) procedure 4303.02, "Abnormal Lake Level," the CPS Main Dam - Emergency Action Plan allows termination of the "Flood Watch." This resulted in a notification to the DeWitt County Sheriff's Department that occurred at 1636 hours on January 16, 2005. Per Exelon Reportability Manual, Reportable Event ENV 3.32, "Emergency Action Plans - Cooling Lakes/Ponds," a four-hour notification to the NRC is required due to notification of an offsite government agency. (Reference 10CFR50.72(b)(2)(xi)). Current lake level is 693 feet - 0 inches (mean sea level) and lowering. Inspections have identified no damage due the heavy rainfall or associated elevated lake level. The licensee will notified the NRC Resident Inspector. R3DO (Phillips) notified. |