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| Entered date | Event description | |
|---|---|---|
| ENS 44441 | 27 August 2008 14:18:00 | On August 27, 2008 at 0950 CDT, a local radio station (in Clinton, Iowa) mistakenly activated an emergency broadcast message concerning the Quad Cities Station. The inadvertent broadcast message occurred during the radio station's participation in a scheduled Quad Cities Station emergency planning exercise. The radio station has announced a correction to the message and rebroadcasted the correct information. Exelon has notified county and state officials and issued a news release. This event is being reported under 10 CFR 50.72(b)(2)(xi). The licensee has notified the NRC Resident Inspector. |
| ENS 43720 | 12 October 2007 18:02:00 | This notification is being made pursuant to 10 CFR 50.72(b)(2)(xi) due to the fact that Exelon Nuclear has informed the Illinois Emergency Management Agency and Illinois Environmental Protection Agency of recent groundwater monitoring results at Quad Cities Station. This notification was made at 16:04 hours CDST on October 12, 2007. As part of the Station's continuing environmental monitoring and sampling program, new wells were recently installed on Station property to better characterize the known, on-site tritium plume previously identified during Exelon's fleetwide tritium study conducted in 2006. Samples from some of the new wells have indicated elevated levels of tritium requiring notification of the State of Illinois. Based on well data to date, the tritium in the groundwater is confined to Exelon property and poses no threat to public health or safety. The Station continues to track this issue by monitoring the existing wells, installing new wells for further assessment, and pursuing underground pipe integrity testing. The NRC Resident Inspector was notified of this event by the licensee. |
| ENS 42356 | 22 February 2006 04:51:00 | At 0122 hours (CST) on February 22, 2006, the Unit 1 reactor automatically scrammed from 85% power due to a valid turbine-generator load reject signal. The maximum reactor pressure was approximately 1050 PSIG during the event. All control rods inserted to their full-in position. Reactor water level decreased to approximately -10 inches, which resulted in automatic Group 2 and 3 isolations as expected. All systems responded properly to the event. Unit 1 is in Mode 3, maintaining reactor pressure, and reactor water level in the normal level band. An investigation into the Unit 1 scram and load reject is in progress. Unit 2 remains at 85% power. This report is being made in accordance with 10CFR 50.72(b)(2)(iv)(B) and 10 CFR50.72(b)(3)(iv)(A). No SRVs opened during the transient. Post shutdown electrical lineup is normal with the exception of the loss of one offsite power supply. Decay heat is being removed via the turbine bypass valves to the main condenser and feedwater being provided via main feedwater. Unit 2 is in a Tech Spec LCO for Loss of One Offsite power source. The licensee notified the NRC Resident Inspector. |