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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 54015 | 21 April 2019 13:20:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Limerick Onsite Non-Work Related Fatality | Event of Public Interest performed to notify State and Local agencies for emergency vehicle response required due to an on-site non-work related illness. The individual was unresponsive and was unable to be resuscitated due to the medical issue. The individual was outside the Radiological Controlled Area (RCA) and no radioactive material or contamination was involved. The NRC Resident Inspector was notified. | ||
| ENS 53556 | 21 August 2018 04:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Holding Pond Overflow | At 2322 EDT, Limerick Generating Station notified the Pennsylvania DEP (Department of Environmental Protection) that our plant waste water pond (holding pond) overflowed due to heavy rainfall in the area. Plant alignment changes were made and the holding pond stopped overflowing at 0017 EDT. Limerick Generating Station has not determined this release to contain oil, grease, or pollutants hazardous to the public. The licensee notified the NRC Resident Inspector. | ||
| ENS 52871 | 25 July 2017 00:44:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification to the Pennsylvania Department of Environmental Protection | |||
| ENS 51847 | 4 April 2016 17:30:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Cooling Tower Water Released to a Non-Permitted Outfall | Notified the Pennsylvania Department of Environmental Protection that Limerick Cooling Tower water was released to a non-permitted outfall through the spray pond (Ultimate Heat Sink) due to system lineups associated with emergent maintenance activities. There was no radioactive material contained within the water released. Corrective actions are being taken to prevent further release via this outfall. The NRC Resident Inspector will be notified. | Spray Pond | |
| ENS 51773 | 7 March 2016 13:37:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Fatality Onsite | At the Limerick Generating Station, an individual experiencing a non-occupational illness was taken to a local medical facility. The individual was not contaminated. Subsequently, Limerick was informed that the individual has suffered a fatality. The individual was a contract employee and was located in a clean break area, within the protected area, when the individual became ill. The licensee has notified the NRC Resident Inspector and OSHA. | ||
| ENS 51749 | 22 February 2016 18:11:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Spurious Actuation of One Emergency Siren During Planned Maintenance | Limerick Generating Station Main Control Room was informed that a Limerick Emergency Preparedness Zone (EPZ) siren located in Skippack Township, Montgomery County, Pennsylvania was sounding by an off-site vendor. This notification is being made in accordance with SAF 1.9 due to a spurious actuation of Limerick Emergency Preparedness Zone (EPZ) siren. The alarm actuated for approximately 90 seconds following preventative maintenance. No actual plant emergency exists. All Limerick EPZ sirens remain functional; no other reportability threshold(s) have been met or exceeded. The licensee informed State and local authorities and the NRC Resident Inspector. | ||
| ENS 50518 | 8 October 2014 08:45:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Sodium Hypochlorite Leak with Potential to Enter the Environment | This notification is being made as a result of notifications to other government agencies. A sodium hypochlorite leak occurred on site at Limerick Generating station on 10/7/14, that had the potential to enter the environment. The leak has been isolated. A flow control valve in the U1 cooling tower chemical treatment system caused the leak. The sodium hypochlorite that leaked was deposited into the onsite Holding Pond. The Holding Pond was being discharged at the time of the leak in accordance with procedures to support normal plant operations. The leak was discovered at 2110 hours (EDT on 10/7/14) and isolated at 2115 hours. The Holding Pond discharge was secured at 2125 hours. Sampling of the Holding Pond confirmed the presence of sodium hypochlorite. Since the Holding Pond was being released at the time of the leak, there is a potential that greater than 67 gallons of sodium hypochlorite could have been released to the Schuylkill River. This report is being made due to the potential that a reportable quantity of sodium hypochlorite could have discharged to the Schuylkill River while the Holding Pond was releasing during the sodium hypochlorite leak. Evaluations are being performed to quantify this actual volume of sodium hypochlorite that was discharged as a result of the leak. The licensee has notified the NRC Resident Inspector and state and local authorities. | ||
| ENS 49691 | 4 January 2014 04:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Siren Activation Caused by Equipment Malfunction | Limerick Generating Station Main Control Room was informed that a Limerick Emergency Preparedness Zone (EPZ) Siren located in South Coventry, Chester County Pennsylvania area was sounding by an off-duty plant employee and confirmed by the Chester County 911 Dispatch Center. Notification occurred at 2300 hours on 1/13/14. This notification is being made in accordance with SAF 1.9 due to a spurious actuation of Limerick Emergency Preparedness Zone (EPZ) Siren. The siren maintenance contractor has been contacted to investigate and silence the sounding alarm. No actual Plant emergency exists. The siren activation was caused by equipment malfunction. (The) remaining 164 of 165 Limerick EPZ Sirens remain functional, no other reportability threshold(s) have been met or exceeded. The licensee has notified the NRC Resident Inspector and state and local authorities. | ||
| ENS 48629 | 28 December 2012 08:30:00 | 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 Communications with All Emergency Planning Zone Sirens | Limerick and associated local counties have lost communications with all Emergency Planning Zones (EPZ) sirens for greater than 1 hour. This exceeds the 25% notification threshold. The contract vendor is responding to the loss to determine repair actions and timeline. The EPZ plan contains alternate methods of notifying the public in the event of an evacuation. Notifications have been made to the State and local agencies regarding this loss of Emergency Preparedness capability at 0913 EST on 12/28/12, which constitutes the 'Offsite Notification' per 10CFR50.72(b)(2)(xi). The licensee has notified Montgomery, Chester, Burkes counties, and the NRC Resident Inspector.
Communications with all EPZ sirens have been restored. The licensee will notify the affected counties and the NRC Resident Inspector. R1DO (Conte) notified. | ||
| ENS 47941 | 22 May 2012 10:35:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Emergency Planning Zone Siren Malfunction | The MCR (Main Control Room) at Limerick Generating Station was informed by PEMA (Pennsylvania Emergency Management Agency) that EPZ (Emergency Planning Zone) siren #129 located at Maryland and Western avenues in Chester County was sounding. The siren maintenance contractor was contacted to silence and repair the siren. No plant emergency exists. The siren activation was caused by an equipment malfunction. The remaining sirens in the EPZ remain functional. An 'Event of Potential Public Interest' will be issued for this problem. The NRC Resident Inspector, the State, and local officials will be notified of the siren malfunction. The state is expected to issue a press release.
The siren was not an EPZ siren but rather a local fire house siren. Therefore, the licensee is retracting this event. Notified the R1DO (Trapp). | ||
| ENS 47823 | 19 March 2012 08:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification to State and Local Agencies Due to Npdes Discharge | The following ENS is being submitted late. On Monday, March 19, 2012 at 3 a.m. a manhole overflowed during a scheduled and permitted radiological release through the cooling tower blow down outfall. As a result, several thousand gallons of water overflowed briefly, formed puddles in the area, and was discharged through a different National Pollutant Discharge Elimination System (NPDES) permitted outfall. The overflow was terminated, water samples were collected from the impacted areas, and the area was remediated in keeping with the Station's environmental monitoring program. Several samples showed increased levels of tritium that were well below permitted Commonwealth and Federal effluent limits. There were no public health risks associated with this event. The NRC Resident Inspector was notified, and courtesy notifications were made to all appropriate government agencies and local stakeholders in accordance with NEI 07-07, Industry Groundwater Protection Initiative, on March 20, 2012. Due to notification of government agencies, this event is being reported under 10CFR50.72 (b)(2)(xi). The licensee informed the Commonwealth of Pennsylvania, and Berks, Montgomery and Chester counties. | ||
| ENS 47726 | 9 March 2012 03:18:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Report of a Single Emergency Siren Actuation | Limerick Generating Station was informed by Montgomery County 911 dispatch center that Limerick Emergency Preparedness Zone (EPZ) siren # 128, at the corner of Vaughn and Springer town roads in Montgomery County was sounding. Notification time was 2218 EST. The siren was silenced at 2227 EST. The siren maintenance contractor was contacted for repairs. No actual plant emergency exists. The siren activation was caused by an equipment malfunction. The remaining 164 of 165 Limerick EPZ sirens remain functional. No other reportability thresholds have been met or exceeded. An 'Event of Potential Public Interest' will be issued to the state and local agencies. The licensee has notified the NRC Resident Inspector. The licensee will also notify state and local authorities. | ||
| ENS 47170 | 19 August 2011 14:30:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Inadvertent Sounding of Emergency Preparedness Zone Siren | Limerick Generating Station Site EP (Emergency Preparedness) Manager was informed by Chester County 911 Dispatch Center that Limerick Emergency Preparedness Zone (EPZ) Siren #132, located at Pothouse Road West of Ridgeview Road in Chester County, was sounding. Notification occurred at 1030 hrs. (EDT) 8/19/11. The siren maintenance contractor was contacted, and the sounding was terminated at 1120 hrs. 8/19/11. No actual plant emergency exists. The siren activation was caused by equipment malfunction. (The) remaining 164 of 165 Limerick EPZ Sirens remain functional, no other reportability threshold(s) have been met or exceeded. An 'Event of Potential Public Interest' will be issued to the state and local agencies. The maintenance contractor is currently troubleshooting the cause. The licensee will be notifying the NRC Resident Inspector. |