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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 56606 | 3 July 2023 20:30:00 | 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 phone and email: At 1530 (EDT) on July 3, 2023, Constellation Generation Company, LLC reported to the Illinois Environmental Protection Agency and the Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS) that tritium concentrations in existing monitoring wells in a known (10 CFR) 50.75(g) recovery area were found higher than normal (at Quad Cities Nuclear Generating Station). This higher than normal tritium concentration did not exceed any NRC regulations or reporting criteria and there is no indication of a liquid release beyond the site boundary. This notification is being made solely as a four-hour, non-emergency notification for a notification of other government agency 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 55922 | 1 June 2022 15:43:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Inadvertent Siren Activation | The following information was provided by the licensee via email followed by phone call: At approximately 1043 CDT, the Quad Cities Main Control Room was notified that the Scott County Iowa warning sirens were activated in error at 1001 CDT. The sirens were not intentionally activated to notify the public of severe weather or pending emergency. This event is reportable per 10 CFR 50.72(b)(2)(xi), News Release or Notification of Other Government Agencies. This is a 4-Hour Reporting requirement. The Quad Cities NRC Resident has been notified. | ||
| ENS 55132 | 10 March 2021 22:23:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Notification of Environmental Report to Another Government Agency | On March 10, 2021, Exelon reported an unpermitted release of a radionuclide (i.e., tritium) into the groundwater within the site boundary at Quad Cities Nuclear Power Station to the Illinois Environmental Protection Agency (IEPA) and the Illinois Emergency Management Agency (IEMA) in accordance with Illinois state regulations. There has been no detection of the release beyond the site boundary. The suspected source for the increased groundwater tritium levels is an onsite water storage tank or pipe; however, an investigation is in progress and the exact cause and source is not yet known. The increase in groundwater tritium concentration does 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. There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. | ||
| ENS 53299 | 29 March 2018 20:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Unpermitted Tritium Release within the Site Boundary | On March 29, 2018, Exelon Generation Company, LLC notified the Illinois Environmental Protection Agency (IEPA) and the Illinois Emergency Management Agency (IEMA) in accordance with state regulations of an unpermitted release of radionuclides at the Quad Cities Nuclear Power Station within the site boundary. There has been no detection of the liquid release beyond the site boundary. No impact to human health or the environment are anticipated. This notification is being made to satisfy 10CFR50.72(b)(2)(xi), notification of the NRC for any event related to the health and safety of the public for which a notification to other government agencies has been or will be made. The source of the Tritium release was from the Rad waste system. The spill was reported to be within the protected area which is within the site boundary. The quantity of the release is unknown at this point as the investigation and spill cleanup is in progress. The Licensee Notified the NRC Resident Inspector. | ||
| ENS 52368 | 16 November 2016 16:10:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Inadvertent Activation of Emergency Sirens and News Release During Emergency Planning Exercise | On November 16, 2016 at approximately 1010 CST, a local government agency (Whiteside County, Illinois) inadvertently activated emergency response sirens for less than one minute. The inadvertent actuation occurred during the scheduled Quad Cities Station emergency planning graded exercise while local government agencies were participating. A related news release and radio message was subsequently issued by Whiteside County to report that Whiteside County was participating in a drill in coordination with the Quad Cities Exelon Generating Station that the emergency response sirens were inadvertently activated, and that there is no emergency at this time and no action is required. There was no impact to the health and safety of the public as a result of this event as the offsite response capabilities remain functional. The site is operating normally with no emergency conditions present. This event is being reported under 10 CFR 50.72(b)(2)(xi), as an inadvertent activation of emergency response sirens and news release. The NRC Resident Inspector has been notified. | ||
| ENS 49589 | 27 November 2013 20:46:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Non-Occupational Death On-Site | At approximately 1446 hours (CST) on November 27, 2013 a badged employee was discovered non-responsive inside a vehicle within the Owner Controlled Area. (The vehicle was located outside the protected area and in the parking lot). On-site and off-site emergency personnel responded to the medical issue. The individual was pronounced dead at 1604 hours. No radioactive material or contamination was involved. The death was not work-related nor the result of an occupational event. This event is being reported under 10CFR50.72(b)(2)(xi). The NRC Resident lnspector has been notified. | ||
| ENS 44441 | 27 August 2008 14:50:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification and Press Release Due to Inadvertent Airing of a Emergency Broadcast Message | 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 21:04:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Made Due to Elevated Levels of Tritium | 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. |