Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 56413 | 15 March 2023 13:50:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification of Inadvertent Actuation of Emergency Sirens | The following information was provided by the licensee via email: At 0950 (EDT) on 3/15/23, the Ottawa County emergency warning siren system was activated. The county issued a press release to state that the intent was to sound the sirens next week on Wednesday, 3/22/23, as part of Severe Weather Awareness Week. All 49 of the Davis-Besse Nuclear Power Station Offsite Emergency Notifications sirens in Ottawa County were sounded as part of the county's activation of the emergency warning siren system (of the 82 sirens total). This notification is being made solely as a four hour, non-emergency notification for a notification of other government agencies in accordance with 10 CFR 50.72(b)(2)(xi). All emergency notification sirens functioned as required. The NRC Resident Inspector has been notified of the issue. | ||
| ENS 54792 | 20 July 2020 00:03:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification - Emergency Siren Failure | In the evening of 7/19/20, a report was received from Ottawa County Sheriff Dispatch personnel that a single siren had sounded. Review of the siren system computer log determined Siren 202 in Carroll Township had malfunctioned and sounded at approximately 2003 EDT, and sounded a second time at approximately 2045 EDT while the siren was being polled for troubleshooting. Personnel were dispatched to Siren 202 to deenergize both the AC and DC power to prevent additional soundings. The cause of the siren sounding is under review, but it occurred following storms passing through the area. 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 54219 | 14 August 2019 16:01:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Inadvertant Activation of Emergency Sirens | At 12:01 PM (EDT), on August 14, 2019, all fifty-four (54) of the Davis-Besse Nuclear Power Station Offsite Emergency Notification sirens were inadvertently activated for one minute during a planned silent test. The County Sheriff's Dispatch Office notified FirstEnergy Nuclear Operating Company of the inadvertent actuation. 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). All sirens remain functional, and the NRC Resident Inspector has been notified of the issue. The Licensee will be notifying Ottawa and Lucas counties and the state of Ohio. The inadvertent activation was by the county dispatcher. | ||
| ENS 49369 | 20 September 2013 18:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Press Release Notification | A press release is being made today by the FirstEnergy Nuclear Operating Company regarding routine inspections of the Davis-Besse Nuclear Power Station's concrete shield building. These routine inspections of the Davis-Besse Nuclear Power Station's concrete shield building conducted to date have confirmed that the building continues to maintain its structural integrity and ability to safely perform its functions. The NRC Resident Inspector has been informed.
The press release originally provided to the NRC was revised prior to release to the public to update the inspections completed to date. The NRC Resident Inspector has been informed. Notified R3DO (Riemer). | Shield Building | |
| ENS 46576 | 31 January 2011 13:49:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Emergency Notification System Sirens Inadvertantly Actuated for 3 Minutes | At 0849 (EST) on 1/31/2011 the Emergency Notification System Sirens inadvertently actuated for 3 minutes. We (Davis Besse) have been informed by Ottawa county that the actuation signal appears to have originated from the Ottawa County Sherriff's dispatcher console. They also informed Davis Besse that Vendor Support is being requested to assist in the determination of the cause. The Ottawa County Emergency Management Agency is planning a news release for the inadvertent actuation. The Emergency Notification System sirens were secured and are considered to be operable. The licensee notified the NRC Resident Inspector. | ||
| ENS 45764 | 13 March 2010 02:43:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | Control Rod Drive Mechanism Nozzle Indications | On March 12, 2010, during the Davis-Besse Nuclear Power Station Unit No. 1 (DBNPS) refueling outage, the documented results of planned ultrasonic (UT) examinations performed on the Control Rod Drive Mechanism (CRDM) nozzles penetrating the reactor vessel closure head (RVCH) identified that two of the nozzles inspected to date did not meet the applicable acceptance criteria. Each of these two nozzles have similar indications that appear to penetrate into the nozzle walls from a lack of fusion point at the outer diameter of the nozzle and the J-Groove weld. Leak path detection was performed on both nozzles with the results showing no leak path. Bare metal visual examinations are scheduled to be performed on all nozzles to determine if there is any pressure boundary leakage. Both indications will require repair prior to returning the vessel head to service. There are sixty-nine nozzles and all will be subject to these UT inspections. It is important to note that this notification is being provided prior to the completion of all of the required UT and VT (Visual Tests) examinations for these two nozzles and the remaining nozzles. The indications were detected with a blade probe used to detect axially-oriented indications. The remaining probe that is used to complete the UT examination in each of these two penetrations is a blade probe that is used to identify circumferentially-oriented indications. The examinations are being performed to meet the requirements of 10CFR50.55a(g)(6)(ii)(D) and ASME Code Case N-729-1, to identify potential flaws/indications well before they grow to a size that could potentially affect the structural integrity of the reactor vessel head pressure boundary. The licensee notified the NRC Resident Inspector and will notify the State of Ohio and both Lucas and Ottawa Counties.
On March 13, 2010, additional Control Rod Drive Mechanism nozzles (4 and 59) were identified that did not meet the applicable acceptance criteria. The indications on these nozzles are similar in nature and location to the indications previously reported for nozzles 28 and 33. These indications will also require repair prior to returning the vessel head to service. Like the two previously reported nozzles, this notification is being provided prior to the completion of all of the required examinations for the nozzle and the remaining nozzles. The indications were detected with a blade probe used to detect axially-oriented indications. The remaining probe that will be used to complete the examination in this penetration is a probe sensitive to circumferentially-oriented indications. Additionally, during the bare metal visual examination of the outer surface of the reactor vessel closure head, boric acid deposits were found at CRDM nozzles 4 and 33 that are indicative of primary water leakage. The visual examination of the RVCH is continuing. The licensee notified the NRC Resident Inspector, State of Ohio, and local government. Notified the R3DO (Phillips).
Update to Davis-Besse event #45764 initially reported 3/13/2010 at 0445 and adding an additional 10 CFR 50.72 reporting criteria. On March 15, 2010, the FirstEnergy Nuclear Operating Company is issuing a press release regarding the Davis-Besse Nuclear Power Station Unit No. 1 reactor vessel head (RVCH) Control Rod Drive Mechanism nozzles that have indications that do not meet the applicable acceptance regulatory criteria. The results of the ongoing planned ultrasonic (UT) examinations performed on these nozzles penetrating the RVCH have identified indications that will require repair prior to returning the vessel head to service. Currently, there are twelve nozzles which will be repaired, two of which have evidence of primary water leakage found during the bare metal visual examination of the outer surface of the reactor vessel closure head. There are sixty-nine nozzles and all are subject to these UT inspections. It is important to note that this media release is being provided prior to the completion of all of the required examinations for these and the remaining nozzles. The licensee notified the NRC Resident Inspector and will be notifying the State of Ohio and both Lucas and Ottawa Counties. Notified R3DO (Monte Phillips) | Control Rod | |
| ENS 45523 | 27 November 2009 12:34:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Accidental Discharge of a Security Officer'S Pistol | On November 27, 2009, at approximately 0734 hours, an accidental discharge of a security officer's sidearm occurred at the Davis-Besse Nuclear Power Station (DBNPS) resulting in a leg injury to the officer. The accidental discharge occurred in the Primary Access Facility. The onsite DBNPS first aid team and the Caroll Township Emergency Medical Services responded to the Primary Access Facility. The injured officer was in stable condition and transported off site (at 0800) to St. Vincent Hospital (in Toledo, OH). Both the Ottawa County Sheriffs Office and the Caroll Township Police Department responded to the DBNPS site to obtain information. The Ottawa County Emergency Management Agency (EMA), the Lucas County EMA, and the Ohio EMA were notified of this incident. The NRC Resident Inspector has been notified. Plant operation was not affected by this incident. (The plant has received calls from the media however,) no press release is planned at this time. | ||
| ENS 45032 | 30 April 2009 12:55:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notifications Made Due to Inadvertant Activation of Six Epz Sirens | At 0855 six sirens had been activated by the Ottawa County dispatch console for 3 minutes. At 0905 Ottawa County Sheriff Dispatch Center notified (the licensee) that sirens in Ottawa County had been inadvertently activated. It appears this was caused by the county radio service vendor resetting the dispatch center consoles during trouble shooting of the sheriff's radio system. Immediate actions taken: RA-EP-00420, Response to Prompt Notification System Malfunction, was implemented. The siren system was polled and the data from the Emergency Operations Facility (EOF) siren computer was reviewed. The computer data indicated at 08:55:55 the six sirens located in Bay Township had been activated by the Ottawa County Dispatch Console for 3-minutes. Fleet siren maintenance was contacted and requested to come to Ottawa County to meet with the radio service vendor to determine the cause of the inadvertent activation. In addition, NOP-LP-5001, Communicating Events of Public Interest, was implemented and associated notifications were made. These notifications included the State of Ohio, Ottawa County, and Lucas County. The NRC Resident Inspector was notified by the licensee. | ||
| ENS 44596 | 23 October 2008 13:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Sump Discharge Line Leakage | This is a report of a situation, related to the protection of the environment, for which a notification to other government agencies is being made, as described in 10 CFR 50.72(b)(2)(xi). On October 22, 2008, excavation within the Protected Area was ongoing to identify a leak in the Fire Protection System. At approximately 1600 hours, the Turbine and Water Treatment Building sump discharge line was identified as leaking. This three-inch carbon steel pipe routes the sump discharge to the settling basins, where it is eventually discharged via a monitored outfall to the environment. The cause of the leakage is unknown, but due to the condition of the piping, it is believed to have existed prior to the excavation activities. The amount of leakage is therefore conservatively assumed to be more than 100 gallons, but this cannot be quantified at this time. Analysis of a water sample from the sump discharge line leak determined that the water leaking from the pipe contains approximately 37,500 picocuries per liter (pCi/l) tritium. These tritium levels are consistent with tritium levels in the Condensate/Feedwater Systems in the Turbine Building. Actions are underway to remove the piping from service and re-route the sump pump discharge. Analysis of routine groundwater well samples taken earlier this month is being expedited, and additional well samples are being planned. The State of Ohio, Lucas County and Ottawa County government agencies were contacted regarding the above information at 0900 on October 23, 2008. The Resident Inspector has also been briefed on the issue. | ||
| ENS 42276 | 20 January 2006 16:25:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Press Release Issued Regarding Agreement with Doj Related to Davis-Besse Reactor Head Issue | A press release is being made today by the First Energy Nuclear Operating Company that it has entered into a deferred prosecution agreement with the U.S. Attorney's Office related to FENOC's communication with the NRC during the fall of 2001 in connection with the reactor head issue at the DBNPS. FENOC has agreed to pay a penalty of $28 million. The licensee informed the NRC Resident Inspector. | ||
| ENS 40906 | 29 July 2004 15:03:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Industrial Accident on the Owner Controlled Area | The following information was received from the licensee via facsimile: (Time 1103 hrs.(EDT)) A lawn mowing company was working outside the protected area when a mower rolled over on the individual doing the mowing. The mowing evolution was near a pond. The mower went over the edge of the pond, landing in the water. The individual operating the mower was trapped under the mower in the water. Several employees from the Davis Besse training center saw the mower in the water and pulled the individual from the water. The victim was not breathing at that time. CPR was performed and Life Flight called. Helicopter on site at 1123 (hrs.) and transported victim to St. Vincent Hospital. Helicopter lifted off from the site at 1138 (hrs.). The victim was breathing on her own at that time but still unconscious. The licensee has notified the NRC Resident Inspector. | ||
| ENS 40736 | 8 May 2004 17:25:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Inadvertent Activation of Emergency Sirens | The following information was obtained from the licensee via facsimile: At 0912 (EDT) the Salem Township sirens, zone 14, sounded for 3 minutes. All ten sirens in zone 14 sounded. The reason for the siren sounding was unknown at that time. The Sheriff Dispatcher notified Emergency Preparedness of the sirens sounding. Emergency Preparedness called the vendor, Transco, to investigate the siren sounding. Transco went to the 500 (foot) siren tower and polled the siren system and found that the Zone 14 sirens had been activated by a signal from the Sheriff Dispatch office at 0912 (hrs.). Transco then went to the Sheriff Dispatch office to look at the system and found no problems. At 1158 (hrs.), on 5/8/04, a quiet test, e.g. low noise level test, was conducted for siren 91, next to the Sheriff's office, to ensure the siren system was operating properly. Discussions with the Sheriff Dispatchers indicated that they were not in the vicinity of the siren console and did not have the siren screen called up. Therefore, it was not possible for the Sheriff Dispatchers to inadvertently activate the sirens. The only other activity in the siren console area was an exterminator working. Therefore, at this time, the most likely cause of the sirens sounding is the exterminator inadvertently activating the Zone 14 sirens. The Prompt Notification System (sirens) were verified capable of performing (their) intended function (operable), at no time was Emergency Notification capability impaired, it was also validated, that once activated by the inadvertent action, the system responded as expected. This spurious activation does not appear in any way to be related to Event #40734 regarding the test failure on May 7, 2004. The licensee has notified the NRC Resident Inspector. |