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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 56366 | 16 February 2023 14:15:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | OFF-SITE Notification of an ON-SITE Fatality | The following information was provided by the licensee via email: On February 16, 2023 at 0859 EST, a contract worker at McGuire was transported off-site for treatment at an off-site medical facility. Upon arrival at the off-site medical facility, medical personnel declared the individual deceased at 0915 EST. The fatality was not work-related and the individual was inside the Radiologically Controlled Area. An on-site survey confirmed that neither the individual nor the individual's clothing were contaminated. A notification will be made to the Occupational Safety and Health Administration. This is a four-hour notification, non-emergency for an on-site fatality and notification of other government agency. This event is reportable in accordance with 10 CFR 50.72(b)(2)(xi). The NRC Resident Inspector has been notified. | ||
| ENS 56316 | 19 January 2023 15:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification - Emergency Sirens Activated During Test | The following information was provided by the licensee via email: On 01/19/23 at approximately 1000 EST, the emergency sirens in Catawba County, Gaston County, Iredell County, Lincoln County, and Mecklenburg County were inadvertently activated by an offsite agency during a planned silent test. The sirens are in the McGuire Emergency Planning Zone (EPZ). Duke Energy notified the state and all counties within the EPZ. Mecklenburg County has issued a press release. This is a four-hour notification, non-emergency for a notification of other government agency. This event is reportable in accordance with 10 CFR 50.72(b)(2)(xi). The NRC Resident Inspector has been notified. | ||
| ENS 53061 | 8 November 2017 13:24:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Switchyard Autotransformer Fire Due to Equipment Failure | At 0824 EST on 11/8/17, a Switchyard Autotransformer began to burn due to an equipment failure. The autotransformer supports interconnectivity between each side of the switchyard and is not required for switchyard operation. There was no work in progress on the associated autotransformer at the time of the event. The autotransformer and the switchyard are outside the protected area approximately one mile away. The fire was contained to the autotransformer only. The fault has been electrically isolated and there was no effect on either MNS (McGuire Nuclear Site) Unit 1 or Unit 2 operations. No personnel were injured as a result of the fire. Local Fire Department responded and has contained the fire. MNS fire brigade leader along with switchyard maintenance have confirmed no effects to the MNS bus lines, power availability, or the ability for the site to generate power. Environmental personnel have made a notification to the National Response Center due to the oil and foam mixture occurring as a result of the fire response. McGuire hazmat personnel are currently working to contain this oil and foam mixture. Environmental personnel are also submitting a report to the NC (North Carolina) Department of Environmental Water Quality within 24 hours. There is no impact to the public. The NRC Resident Inspector has been informed. | ||
| ENS 51207 | 8 July 2015 12:20:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Worker Fatality Not Related to Plant Operation | This notification is being reported to the NRC in accordance with 10 CFR 50.72(b)(2)(xi) for notification of a fatality of an employee. Station personnel intend to notify OSHA of the individual fatality. At approximately 0629 (EDT) on July 8th, 2015, Control Room personnel received an emergency call requiring station medical first responders. The individual was transported offsite via ambulance. The site has been notified of the individual fatality. The fatality was due to an apparent personal medical issue and not work related. The individual was not contaminated. A press release is not planned at this time. The NRC Resident Inspector has been notified. The individual was inside the Protected Area but not within a Radioactive Control Area. | ||
| ENS 50147 | 29 May 2014 00:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Regarding Potential Malfunctioning Emergency Notification Siren | One emergency siren was making noise (siren 27). Huntersville Fire Department was contacted by someone in the area of the siren. No siren was activated. Initial investigation shows power loss to this one siren around the time of occurrence. Local news media contacted Duke Energy representative to question if sirens were set off. Continue to investigate to determine the issue with this one siren. Emergency Planning notified Mecklenburg County of failure of siren #27. The licensee notified the NRC Resident Inspector. | ||
| ENS 50095 | 8 May 2014 08:29:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of 34 Emergency Sirens | At approximately 0429 hours (EDT) on May 8, 2014, McGuire was informed that 34 emergency sirens were incapable of activation from the primary location. The loss of these 34 sirens for more than one hour is reportable pursuant to 10 CFR 50.72(b)(3)(xiii). Until repairs are complete, backup route alerting is in place. Troubleshooting is in progress. During troubleshooting, an inadvertent actuation of emergency sirens occurred at 1030 hours (EDT) on May 8, 2014. Mecklenburg County Emergency Management was notified of this inadvertent actuation which is being reported pursuant to 10 CFR 50.72(b)(2)(xi). Although these sirens were activated there was no incident at McGuire. This event does not impact public health and safety. The NRC Resident Inspector and local agencies were notified.
The emergency sirens have been repaired and are functional. The NRC Resident Inspector has been notified. Notified R2DO (Bonser). | ||
| ENS 49157 | 29 June 2013 04:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification to North Carolina - Rain Caused Overflow of Holdup Pond to Catawba River | Notification is to be made to an offsite agency: North Carolina Department of Environment and Natural Resources (NCDENR). Due to heavy rains on site, a holdup pond overflowed to the Catawba River. Holdup pond overflow included chemicals (Rotenone) used to treat macro fouling in the Standby Nuclear Service Water Pond. Notification to NCDENR will be made by telephone Saturday morning 6/29/13. The licensee notified the NRC Resident Inspector.
Due to continued rains on site, the holdup pond continues to overflow to the Catawba River. The overflow includes a new chemical, Potassium Permanganate, used to neutralize the Rotenone treatment of the Standby Nuclear Service Water Pond. This new chemical has the potential to initially turn water purple, which is normal when applied. The North Carolina Department of Environment and Natural Resources (NCDENR) has been updated. The licensee notified the NRC Resident Inspector. Notified R2DO (Freeman). | Service water | |
| ENS 48703 | 28 January 2013 21:20:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Fire in Storage Building in Owner Controlled Area | A fire was reported within the Owner Controlled Area but outside the Protected Area. The fire was located in an air conditioning unit for a small building. The fire was extinguished within 15 minutes by the offsite fire department. The plant did not sustain any damage. The NRC Resident Inspector has been informed. | ||
| ENS 48679 | 17 January 2013 19:25:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Fire in Switchyard Circuit Breaker | Failure of Unit 2 McGuire switchyard Power Circuit Breaker (PCB) 55 resulted in a fire and damage to the PCB. PCB 55 and the McGuire switchyard are located outside of the protected area. The fire was confined to the PCB only and extinguished by offsite municipal fire department in 33 minutes. This breaker affects the offsite transmission supply to Rock Springs and South Mountain. The Unit 2 plant breakers connecting offsite to onsite power were not affected and remain in service. The failure of PCB 55 did not damage any plant equipment nor did this event cause a plant transient. An estimated 50 gallons of oil has spilled from the damaged equipment which is contained to the immediate area. The spilled oil cleanup efforts are underway at this time. The NRC Resident Inspector will be informed. | ||
| ENS 48185 | 13 August 2012 20:30:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification to the North Carolina Wildlife Resources Commission | Duke Energy notified the NC Wildlife Resource Commission of dead catfish in the vicinity of the McGuire low level intake. Notification was made on 8/13/12 at 1630 EDT. In addition, the NC Dept. of Environment and Natural Resources will be notified. The dead fish are suspected to have been caused by increasing lake temperature and decreased oxygen levels, which is common during the late summer. The NRC Resident Inspector will be notified. | ||
| ENS 48144 | 30 July 2012 17:50:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Notification of North Carolina Wildlife Resources Due to Strip Bass Mortality | Duke Energy notified the NC Wildlife Resource Commission of dead striped bass in the vicinity of the McGuire low level intake. Notification was made 7/30/12 at 1350 EDT. In addition, the NC Dept. of Environment and Natural Resources will be notified. Dead fish are suspected to have been caused by increasing lake temperature and decreased oxygen levels, which is common during the late summer. The NRC Resident Inspector will be notified. Notified both R2DO (Franke). | ||
| ENS 47689 | 23 February 2012 06:22:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification to Law Enforcement | Offsite notification to law enforcement agencies was made by the licensee due to an individual making threats against personnel and security at the site. The licensee notified the NRC Resident Inspector. Contact the Headquarters Operations Officer for additional details. | ||
| ENS 47673 | 17 February 2012 18:05:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification of Waste Water Pond Toxicity Levels Exceeding Limits | On 02/17/12, McGuire Environmental Management notified the North Carolina Department of Environment and Natural Resources located in Mooresville, NC of a failed toxicity test on our waste water discharge point 002 (WC Pond). This test is required quarterly by our NPDES (wastewater) Permit. Discharge was stopped yesterday (02/16/12) afternoon and we are currently pulling toxicity tests on the WC Pond and Initial Holdup Pond to determine if we still have toxicity. No WC Pond release will occur until toxicity results are known to be within acceptable limits. The NRC Resident Inspector has been notified. | ||
| ENS 47109 | 29 July 2011 20:15:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Notification of North Carolina Wildlife Resources Due to Striped Bass Mortality | Duke Energy Scientific Services group notified the NC (North Carolina) Wildlife Resources Commission that we (Duke Energy) had identified some striper fish mortalities in and around Cowan's Ford Dam on Lake Norman. We also notified North Carolina Department of Environmental and Natural Resources in Mooresville, N.C. about the Striper mortalities. (Duke Energy personnel) collected 49 stripers in various stages of decay today (Friday, 7-29-2011). The fish collected were around the Cowan's Ford Dam and up to 1 mile North of Darn on Lake Norman. The Duke Energy Scientific Services group representative also notified the NC Wildlife Resources Commission that the McGuire Nuclear Station had been operating their Low Level Intake (LLI) Pumps to support compliance with our NPDES Permit average monthly temperature limit of 99 degrees Fahrenheit. July has been unusually hot and plant management has felt the need to run the LLI approximately 5 days to achieve compliance with our temperature limit. The LLI Pumps were secured July 25th at 2015. During the operation of the LLI pumps, Duke Energy's Scientific Services group was monitoring water quality and fish in the lake via the following activities. 1) Around-the-clock monitoring of fish behavior in the immediate vicinity of the LLI via a Didson Camera. The Didson Camera sits atop the LLI (25 meters deep) and records hourly video of areas both above the LLI and in front of the LLI. These videos are monitored remotely by (personnel) throughout the day and night. 2) Periodic water quality monitoring including dissolved oxygen and temperature profiles at every meter to the bottom of the lake. These profiles occur in the fore bay and at multiple locations up the lake channel. 3) Surveys for dead striped bass by boat up the major tributaries of the lake. Lengths, weights and condition of both dead and dying stripers are recorded before disposing of them. 4) Hourly MNS discharge temperature monitoring. The licensee notified the NRC Resident Inspector. | ||
| ENS 47078 | 20 July 2011 19:55:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification to the North Carolina Wildlife Resources Commission | Duke Energy Scientific Services group representative notified the NC Wildlife Resources Commission at 1555 hours that MNS was operating their LLI Pumps to maintain discharge temperatures within the NPDES permit average monthly temperature limit. Based on the elevated lake temperatures, action to align circulating water to the LLI (cooler water) is necessary to prevent exceeding discharge temperature limits. Operation of the LLI pumps is sometimes needed during this time of year to comply with the water permit. Substantial effort is taken to avoid this alignment due to the potential to accelerate the natural phenomenon of oxygen depletion in the lower depths of Lake Norman that occurs as water temperature increases. The normal seasonal oxygen level changes can stress the fish population in that depth of the lake. During the operation of the LLI pumps, Duke Energy's Scientific Services group monitors water quality and fish in the lake via the following activities, 1) Hydro acoustic surveys of the Cowan's Ford Dam fore-bay both immediate to the dam and also an approximate 2 mile run up the Catawba River channel. 2) Monitoring of fish behavior in the immediate vicinity of the LLI. A DIDSON camera sits atop the LLI (25 meter deep). 3) Water quality monitoring including dissolved oxygen and temperature profiles at every meter to the bottom of the lake. These profiles occur in the fore-bay and at multiple locations up the channel. 4) Hourly MNS discharge temperature monitoring. These activities will continue to be exercised until the LLI pumps are turned off or the natural cycle of oxygen depletion has ended. The licensee notified the NRC Resident Inspector. | ||
| ENS 47222 | 20 April 2011 14:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification to Federal Agency Regarding Excavation Activities | On April 16, 2011, a suspected buried pipe leak was identified in the plant yard. Subsequent investigation revealed that the source of the water was a leak in the Unit 1 Condenser Circulation Water (RC) intake pipe. In order to perform a repair, the ground in the vicinity of the pipe, including the toe of the dike berm, required excavation. McGuire Nuclear Station (MNS) site personnel recognized that excavating into the dike would require Federal Energy Regulatory Commission (FERC) involvement. Duke Hydro was contacted, and confirmed that the dike across the MNS intake is an extension of the Cowans Ford Dam and would require FERC authorization to dig into it. On the morning of April 20, 2011, Duke Hydro personnel contacted the FERC engineer assigned to Duke Energy's Cowans Ford Hydroelectric Development to seek FERC authorization for the excavation. Duke Hydro hosted a conference call later that same morning between FERC's Atlanta Regional Office and MNS site personnel to discuss the details of the situation and planned repairs. FERC later dispatched their personnel to the site to observe the repair effort. 10 CFR 50.72(b)(2)(xi) requires a 4-hour notification to be made for 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. �50.72(b)(2)(xi) further states that such an event may include an onsite fatality or inadvertent release of radioactively contaminated materials. Although a phone call to an outside government agency (FERC) was made, Duke Energy made the decision at the time to not make a 4-hour notification to the NRC. This decision was based on the belief that 1) the RC leak and impact on the dike had no safety significance, 2) there were no concerns regarding protection of the environment, and 3) the situation did not involve an on-site fatality or an inadvertent release of radioactively contaminated materials. However, based upon how the matter was characterized in discussions between NRC and FERC, the NRC is not in agreement with the Duke Energy position. Therefore, the purpose of this phone call is to provide the necessary 10 CFR 50.72(b)(2)(xi) notification retroactively. | ||
| ENS 46662 | 8 March 2011 08:57:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Onsite Fatality | At 0357 (EST on 3/8/11) the licensee received a call for medical assistance. The caller reported an individual (contract employee) had passed out but was still breathing. Our (McGuire) onsite medical response team reported the person was not breathing and in cardiac arrest. The person was transported offsite via ambulance (Gileade Volunteer Fire and Rescue) to the local hospital. At 0602 EST, the licensee received word that the individual had passed away at the hospital. The licensee will notify the NRC Resident Inspector | ||
| ENS 46463 | 7 December 2010 20:32:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Sewage Spill | An approximate 14,000 gallon sewage spill was identified outside the plant protected area (coming) from a sewage manhole. The spill was suspected to have begun on 12/6/10. Site personnel have responded and the upstream lift station has been secured which has stopped the spill. The manhole is presently being pumped down at this time. It appears at this time that the spill occurred from a severely corroded clean-out pipe cap. This sewage spill has no effect on safe operation of McGuire Units 1 and 2. The licensee will notify the NRC Resident Inspector and the North Carolina Department of Environment and Natural Resources in Mooresville, NC. | ||
| ENS 46114 | 21 July 2010 21:30:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Notification of North Carolina Wildlife Resources Due to Striped Bass Mortality | Duke Energy Scientific Services group notified the NC (North Carolina) Wildlife Resources Commission that we (McGuire Nuclear Station) were experiencing some Striper mortalities in and around the Cowan's Ford Dam. Since Monday (7/19/2010) of this week we have collected approximately 100 dead stripers. Some appear to have died from fishing related activities (catch and release) but some were also noted to be stressed from oxygen deprivation. (The Duke Energy Scientific Services group representative) also notified the NC Wildlife Resources Commission the McGuire Nuclear Station was operating their Low Level Intake (LLI) Pumps to support maintenance of their NPDES Permit 99 degree Fahrenheit average monthly temperature limit. July has been unusually hot and plant management has felt the need to run the LLI approximately 6 days to achieve compliance with our temperature limit. During the operation of the LLI pumps, Duke Energy's Scientific Services group is monitoring water quality and fish in the lake via the following activities: 1) Daily hydroacoustic surveys of the Cowans Ford Dam forebay both immediate to the dam and also an approximately 2 mile run up the Catawba River channel. 2) Around-the-clock monitoring of fish behavior in the immediate vicinity of the LLI. A DIDSON camera sits atop the LLI (25 meter deep) and is automated to record hourly video of areas both above the LLI and in front of the LLI using motorized rotators. These videos are monitored by (personnel) throughout the day and night. 3) Every other day water quality monitoring including dissolved oxygen and temperature profiles at every meter to the bottom of the lake. These profiles occur in the forebay and at multiple locations up the channel. 4) Daily surveys for dead striped bass by boat up the major tributaries of the lake. We will record lengths and condition of both dead and dying stripers before disposing of them. 5) Hourly MNS discharge temperature monitoring. These activates will continue to be exercised until the pumps are turned off. The licensee notified the NRC Resident Inspector. | ||
| ENS 43971 | 8 February 2008 19:02:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Ph Monitoring Probe Effluent Bypasses the Waste Holdup Pond | As part of the on going investigation of the final holdup pond (NRC Notification #43958), McGuire has identified a discharge path from the pH monitoring and adjustment system that has existed since plant startup. This discharge path has been secured. The North Carolina Department of Environmental and Natural Resources will be notified. The effluent from the pH monitoring probe had been routed to a pit which drains into the river i.e. bypassing the holdup pond. The licensee notified the NRC Resident Inspector. | ||
| ENS 43958 | 4 February 2008 14:15:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification to the North Carolina Department of Environment and Natural Resources | A leak in the final holdup pond has resulted in a release of treated wastewater to the environment. North Carolina Department of Environment and Natural Resources (has) been notified. The volume of the leak was approximately 100,000 gallons and the leak was to groundwater. The licensee has sampled the wastewater for tritium and determined that the activity was below reporting limits. The licensee has notified the NRC Resident Inspector. |