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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 41177 | 7 November 2004 11:20:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Spds and Erds Due to Planned Maintenance | The Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) were removed from service while implementing a planned modification to replace the Visual Annunciator System, Iso-Mimic display system, and support planned maintenance on uninterruptible power supplies. SPDS and ERDS will be returned to service in approximately 14 days. During this period, any out of service indication on the SPDS can be obtained by control board indications. The Emergency Notification System will remain operable. These conditions are reportable in accordance with 10 CFR 50.72(b)(3)(xiii). The NRC Resident inspector has been notified. The plant is in Mode 4, Reactor Coolant Temperature is 115 deg and Div. 1 RHR is in shutdown cooling.
This is an update to Event No. 41177. ERDS and SPDS have been restored following design change implementation on the Annunciator System. The plant remains in Mode 4 completing outage activities to support startup. The licensee will inform the NRC Resident Inspector. Notified R3DO (Ken O'Brien). | Emergency Response Data System Shutdown Cooling Safety Parameter Display System | |
| ENS 42246 | 10 January 2006 16:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Ens and Commercial Line Communication Due to Fiber Optic Line Break | At approximately 1100 EST on 1/10/06, the capability of the ENS and commercial telephones to communicate with offsite authorities was found to be not functioning. In addition, the capability of the ERDS system to communicate with the NRC is not functioning. Communications to offsite authorities have been verified using microwave communications (RERP phone lines). The cause of the problem has been determined to be an offsite cable break within the telecommunication provider's network. All onsite communications (including onsite telephones) are functioning properly. Offsite telecommunication company personnel are working to repair the broken cable. Currently, repairs are estimated to be complete by 1800 EST. The NRC Senior Resident Inspector has been notified. This report is being made pursuant to 10CFR50.72(b)(3)(xiii), as an event that results in a major loss of offsite communications capabilities.
This is a follow-up to NRC Event No. 42246: Offsite repairs of the broken telecommunications cable which caused a loss of capability to communicate with offsite authorities using ENS, commercial telephones and ERDS has been completed. Proper operation of ENS, commercial telephone lines and ERDS to communicate with offsite authorities has been verified. All offsite communication systems have been returned to normal. The licensee will notify the NRC Resident Inspector. Notified R3DO (O'Brien)
At 1850 on 1/10/06, the capability of the ENS and commercial telephones to communicate with offsite authorities was again found to be not functioning. Discussion with telecommunication personnel indicate that troubleshooting and repair to the broken cable is continuing and will take approximately 4 hours. During this time, the communications with outside authorities will be intermittent. Therefore, this report is being made pursuant to 10CFR50.72(b)(3)(xiii), as an event that results in a major loss of off-site communications capabilities. The licensee notified the NRC Resident Inspector, and state and local emergency response organizations. Notified R3DO (O'Brien)
Offsite repairs of the broken telecommunications cable which caused a loss of capability to communicate with offsite authorities using ENS, commercial telephones and ERDS has been completed. Proper operation of ENS, commercial telephone lines and ERDS to communicate with offsite authorities has been verified. All offsite communication systems have been returned to normal." State and Local governments notified. The NRC Resident Inspector will be notified. R3DO (O'Brien) notified. | ||
| ENS 42482 | 7 April 2006 21:07:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Offsite Communication Capability - Planned Maintenance on Spds and Erds Systems | The Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) were removed from service for planned Preventive Maintenance on the Uninterruptible Power Supply (UPS) system. SPDS and ERDS are scheduled to be restored on 4/9/2006. During this period any out of service indication on the SPDS can be obtained from control board indications. The Emergency Notification System will remain operable. These conditions are reportable in accordance with 10CFR50.72(b)(3)(xiii). The NRC Resident Inspector has been notified. The Reactor is currently defueled while in a refuel outage. Reactor Coolant Temperature is 87 degrees and Div 2 RHR is in shutdown cooling. The licensee maintains secondary indication capability via control panel indicators.
SPDS and ERDS are now fully functional and have been returned to service as of 1130 EDT on 4/12/06. The licensee will notify the NRC Resident Inspector. R3DO (Phillips) notified. | Emergency Response Data System Shutdown Cooling Safety Parameter Display System | |
| ENS 43171 | 19 February 2007 13:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Eof Not Available During Renovation | Fermi 2 commenced an upgrade to the Emergency Operations Facility (EOF) on February 19, 2007 at 0800. The upgrade consists of furniture replacement and rearrangement of the seating layout. During this work, some floor panels will be removed for cable routing and accordingly the facility will not be available for emergency use. Fermi is making this notification in accordance with 10 CFR 50.72(b)(3)(xiii). In the event EOF activation is necessary, the Alternate EOF will be utilized. Activation and use of the alternate EOF is included in Fermi's Radiological Emergency Response Preparedness Plan. Fermi will notify the NRC upon completion of this work, which is scheduled for Friday February 23, 2007. The licensee will notify the NRC Resident Inspector.
This is a follow-up to NRC Event No. 43171. The upgrades to the Emergency Operations Facility (EOF), which caused it to be unavailable for emergency use, have been completed and the EOF is now available for use. The licensee notified the NRC Resident Inspector. | ||
| ENS 43178 | 21 February 2007 18:30:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Alternate Eof Unavailable | While the normal Emergency Operations Facility (EOF) was unavailable due to modification, the space that is utilized for the Alternate EOF was in a locked condition and it is normally not locked. This condition was discovered during the dayshift and was readily corrected. However, had the facility been required during off hours it would have delayed activation of the Alternate EOF. Additionally, activation of the Alternate EOF would have been hampered by key availability to the facility storage room and supply cabinet. Access to Alternate EOF and equipment has been restored. The licensee notified the NRC Resident Inspector. | ||
| ENS 43565 | 14 August 2007 16:51:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Unavailable for Emergency Use | Fermi 2 removed the Technical Support Center (TSC) heating ventilation and air conditioning system from operation to facilitate preventive maintenance activities on August 14, 2007. During this work, the facility will not be available for emergency use. Fermi is making this notification in accordance with 10 CFR 50.72(b)(3)(xiii). In the event TSC activation is necessary, the EOF will be utilized. Activation and use of the EOF as a backup for the TSC is included in Fermi's Radiological Emergency Response Preparedness Plan, and drills have been held performing both the TSC and EOF functions from the EOF. Fermi will notify the NRC upon completion of this work, which is scheduled for Wednesday August 15, 2007. The licensee will notify the NRC Resident Inspector.
Preventive Maintenance activities on the TSC HVAC system have been complete. The TSC is now available for use. The licensee notified the NRC Resident Inspector. Notified R3DO (J. Cameron) | HVAC | |
| ENS 43768 | 3 November 2007 21:22:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Spds and Erds Due to Planned Maintenance | At 1722 hours, on 11/3/2007, the SPDS and ERDS system was removed from service to support activities for a planned maintenance outage on the UPS vital bus power supply. The duration of work is expected to be approximately 48 hours. During this time, Control Room indications and alternate methods will be available. Since the SPDS computer system will he unavailable for greater than 8 hours, this is considered a Loss of Emergency Assessment Capability and reportable under 10CFR50.72(b)(3)(xiii). The licensee will notify the NRC Resident Inspector.
Maintenance activities are continuing on the power supply for the SPDS and ERDS systems. Current estimate will restore the computer systems by 2000 on 11/08/07. An update will be provided once SPDS and ERDS are restored." R3DO (M. Phillips) notified. The licensee notified the NRC Resident Inspector.
Planned work which resulted in the removal from service of SPDS and ERDS has been completed. SPDS and ERDS have been restored to service as of 1115 11/8/2007. The licensee notified the NRC Resident Inspector. Notified the R3DO (Phillips). | ||
| ENS 44280 | 10 June 2008 00:07:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Operations Facility Power Outage | The Emergency Operations Facility (EOF) became unavailable when a storm took down the power line supplying the building that houses the EOF. The emergency diesel generator failed to start, leaving the EOF without power. Notification being made in accordance with 10CFR50.72(b)(3)(xiii). If EOF actuation is necessary, the alternate EOF will be utilized. The licensee is investigating the failure of the backup emergency diesel generator to start. The licensee notified the NRC Resident Inspector.
Power had been restored to the EOF at the time of the initial notification. Power was unavailable on 6/9/2008 from 2007 to 2312, a period of three hours and five minutes. The licensee notified the NRC Resident Inspector. Notified the R3DO (Louden). | Emergency Diesel Generator | |
| ENS 44565 | 14 October 2008 09:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Removed from Operation for Maintenance | Fermi 2 is removing, on October 14, 2008, the Technical Support Center (TSC) heating, ventilation, and air conditioning system from operation to facilitate maintenance activities. During this work, the facility will not be available for emergency use. Fermi is making this notification in accordance with 10CFR 50.72(b)(3)(xiii). In the event TSC activation is necessary, the Emergency Offsite Facility (EOF) will be utilized. Activation and use of the EOF as a backup for the TSC is included in Fermi's Radiological Emergency Response Preparedness Plan, and drills have been held performing both the TSC and EOF functions from the EOF. Fermi will notify the NRC upon completion of this work which is expected to be approximately one day. The Licensee will notify the NRC Resident Inspector.
Preventative Maintenance Activities on the TSC HVAC system have been completed. The TSC is now available for use. The licensee will notify the NRC Resident Inspector. Notified R3DO(Phillips). | HVAC | |
| ENS 44824 | 2 February 2009 19:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Non-Functional | On February 2, 2009, at 1400, the Technical Support Center (TSC) heating, ventilation, and air conditioning system was discovered to be nonfunctional. Initial investigation revealed an electrical fault in the supply fan motor. Fermi is making this notification in accordance with 10CFR 50.72(b)(3)(xiii). In the event that TSC activation is necessary, the Emergency Offsite Facility (EOF) will be used. Activation and use of the EOF as a backup facility for the TSC is included in Fermi's Radiological Emergency Response Preparedness Plan, and drills have been held performing both the TSC and EOF functions from the EOF. Fermi will notify the NRC upon completion of corrective maintenance. The licensee has notified the NRC Resident Inspector.
Corrective maintenance activities on the TSC HVAC system are complete and the TSC is now available for use. The licensee has notified the NRC Resident Inspector. Notified R3DO (Ring). | HVAC | |
| ENS 44968 | 3 April 2009 20:30:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Planned Maintenance on Spds and Erds | At 1630 hours on 04/03/2009, the SPDS and ERDS system was removed from service to support activities for a planned maintenance outage on the UPS vital bus power supply. The duration of work is expected to be approximately 24 hours. During this time, Control Room indications and alternate methods will be available. Since the SPDS computer system will be unavailable for greater than 8 hours, this is considered a Loss of Emergency Assessment Capability and reportable under 10CFR50.72(b)(3)(xiii). The licensee will notify the NRC Resident Inspector.
Update to event #44968 regarding SPDS and ERDS system removed from service to support planned outage on the UPS vital power supply. Planned work which resulted in the removal from service of the SPDS and ERDS has been completed. The licensee will notify the NRC Resident Inspector. Notified R3DO (Daley). | ||
| ENS 44984 | 11 April 2009 16:10:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Emergency Assessment Capability - Technical Support Center Ventilation Unavailable | Notified by Engineering that Technical Support Center (TSC) emergency charcoal sample failed acceptance criteria. Declared TSC ventilation unavailable at 12:10 PM EDT, 4/11/09. TSC ventilation supports RERP radiological habitability function and as such represents a major loss of emergency assessment capability, offsite response capability, or offsite communications capability in accordance with 10CFR50.72(b)(3)(xiii). Notified all Shift Managers if an emergency event is declared (Alert or higher), Shift Managers will need to modify emergency call out service so that TSC staffing report to Emergency Operating Facility (EOF). The use of the EOF as a backup facility for the TSC is included in Fermi's RERP Plan. Fermi will notify the NRC upon completion of corrective maintenance. The licensee notified the NRC Resident Inspector.
Regarding Technical Support Center (TSC) ventilation unavailability: Corrective maintenance to restore HVAC system has been completed satisfactorily. TSC has been restored as an Emergency Response facility. The TSC was declared operable at 1457 EDT. Corrective maintenance included replacing the out-of-spec charcoal filters and satisfactory follow-up tests. The licensee notified the NRC Resident Inspector. Notified R3DO (Hills). | HVAC | |
| ENS 44999 | 20 April 2009 03:15:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Safety Parameter Display System and Emergency Response Data System Out of Service for Planned Maintenance | On 4/19/09 at 2315 EDT, Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) were removed from service to support activities for a planned maintenance outage on the UPS vital bus power supply. The duration of work is expected to be approximately 24 hours. During this time, the majority of the Control Room indications remain available to the plant staff, and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems, if needed. The plant is currently in Mode 5, and will remain in Mode 5, for the duration of the SPDS and ERDS unavailability. Since the unavailability will last greater than 8 hours, this is considered a Loss of Emergency Assessment Capability, and reportable under 10CFR50.72(b)(3)(xiii). The NRC Resident Inspector has been notified.
Update to Event #44999 regarding SPDS and ERDS being removed from service to support planned maintenance on the UPS vital bus power supply. Maintenance is complete, and SPDS and ERDS were returned to service on 4/20/09 at 2230 EDT. The NRC Resident Inspector has been notified. Notified R3DO (Cameron). | Emergency Response Data System Safety Parameter Display System | |
| ENS 45230 | 27 July 2009 13:35:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Temporarily Unavailable for Use | On July 27, 2009, Fermi 2 is removing the Technical Support Center (TSC) from operation to facilitate maintenance activities for furniture and facility upgrade. During this work the facility will not be available for use. Fermi 2 is making this notification in accordance with 10 CFR 50.72(b)(3)(xiii). In the event TSC activation is necessary the Emergency Operations Facility (EOF) will be utilized. Activation and use of the EOF as a back up for the TSC is included in Fermi 2's Radiological Emergency Response Preparedness Plan. The Emergency Call Out System (ECOS) is designed to facilitate contacting TSC personnel to respond directly to the EOF in the event of an emergency. Fermi 2 will notify the NRC upon completion of this work which is expected to be July 31, 2009. The licensee has notified the NRC Resident Inspector.
Update to Event #45230 regarding unavailability of the Technical Support Center (TSC) for planned furniture and facility upgrade. The work to upgrade the facility has been completed satisfactorily. The TSC has been restored as an Emergency Response facility. The facility had been removed from operation on July 27, 2009 at 0935 EDT. The TSC was restored to operation at 1330 EDT on July 31, 2009. The NRC Resident Inspector has been notified. Notified R3DO(Daley). | ||
| ENS 45287 | 24 August 2009 13:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Eof Backup Diesel Failure and Eof Outage | On August 24, 2009 at 0900 EDT the Fermi 2 Emergency Operations Facility (EOF) was declared unavailable due to failure of the EOF backup diesel generator to start during weekly testing. Fermi 2 is making this notification in accordance with 10 CFR 50.72(b)(3)(xiii). In the event that EOF activation is necessary, the alternate EOF will be utilized. Activation and use of the alternate EOF is included in Fermi's Radiological Emergency Response Preparedness Plan. The alternate EOF has been verified available. Investigation into the failure of the EOF backup diesel generator start failure is in progress. Fermi will notify the NRC when EOF availability is restored. The licensee notified the NRC Resident Inspector.
Repairs have been made to the EOF backup diesel generator and it was successfully tested. The EOF is now available for use. The NRC Resident Inspector has been notified. Notified R3DO (Orth). | ||
| ENS 45512 | 21 November 2009 10:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Out of Service Due to Planned Electrical Maintenance | On November 21, 2009, Fermi 2 (removed) the Technical Support Center (TSC) from operation to facilitate maintenance on the facilities' 480-volt AC power supply. This work affects TSC lighting, computers, and ventilation. During this work, which is expected to last over 8 hours, the TSC will be unavailable. In the event TSC activation is necessary, the Emergency Operations Facility (EOF) will be used for the TSC function. Activation and use of the EOF as a backup for the TSC is included in Fermi 2's Radiological Emergency Response Preparedness Plan. The Emergency Call Out System (ECOS) is designed to facilitate contacting TSC personnel to respond directly to the EOF in the event of an emergency. Fermi 2 is making this notification in accordance with 10 CFR 50.72(b)(3)(xiii). Fermi 2 will notify the NRC upon completion of this work. Fermi 2 will notify the NRC Resident Inspector.
The planned maintenance has been completed and the TSC has been restored as an Emergency Response Facility. The licensee will notify the NRC Resident Inspector. | ||
| ENS 45530 | 1 December 2009 17:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Ipcs System Oos for Security Modification | Beginning December 1,2009, at approximately 1200, the Fermi 2 Integrated Plant Computer System (IPCS) will be removed from service to support installation of a Cyber Security Modification. The Safety Parameters Display System (SPDS) and Emergency Response Data System (ERDS) reside on the PCS platform and will be out of service when the PCS is removed from service. These systems will be unavailable to the Control Room and all other Emergency Response Facilities (ERFs) for approximately six hours. By 1800, it is planned to restore IPCS, including SPDS and ERDS, to the Control Room, Operational Support Center, and the Technical Support Center. The IPCS will remain unavailable to the Emergency Operations Facility (EOF) as well as alternate EOF. On December 2, at approximately 1600, IPCS will be restored to the EOF but will remain unavailable to the alternate facilities. On December 3, 2009, at approximately 1600, IPCS will be restored, including alternate facilities. During this entire duration dose assessment capability will only be available in the manual data input mode. A follow-up notification will be submitted when the PCS is completely restored. For the first six hours of the PCS outage, the emergency assessment capability of all Fermi 2 ERFs will be degraded by the loss of IPCS and SPDS. During this period the ERDS function will also be lost. For the following 24 hrs., the EOF will have no IPCSs capability, which includes the SPDS function. Based on the aggregate effect of these losses, this notification is being made per the requirements of 8 Hour Non-Emergency Notification 10CFR,50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability. The licensee will notify the NRC Resident Inspector.
On December 3, 2009, at 1530, emergency assessment capability has been restored to all on site emergency response facilities. The licensee will notify the NRC Resident Inspector. R3DO (Riemer) notified. | Emergency Response Data System | |
| ENS 45900 | 5 May 2010 09:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Out of Service for Preventive Maintenance | On May 5, 2010, at 0500 hours EDT, Fermi 2 removed the Technical Support Center (TSC) from operation to facilitate routine preventive maintenance on the facilities' heating ventilation and air-conditioning system. During this work, which is expected to last approximately 12 hours, the TSC will be unavailable. In the event TSC activation is necessary, the Emergency Operations Facility (EOF) will be used for the TSC function. Activation and use of the EOF as a backup for the TSC is included in Fermi 2's Radiological Emergency Response Preparedness Plan. The Emergency Call Out System (ECOS) is designed to facilitate contacting TSC personnel to respond directly to the EOF in the event of an emergency. Fermi 2 is making this notification in accordance with 10 CFR 50.72(b)(3)(xiii). Fermi 2 will notify the NRC upon completion of this work. Fermi 2 has notified the NRC Resident Inspector. * * * UPDATE FROM JIM KONRAD TO PETE SNYDER ON 5/5/10 AT 1725 EDT * * * Maintenance to restore ventilation has been completed. The TSC has been restored as an Emergency Response Facility. Notified R3DO (Passehl). | ||
| ENS 46388 | 3 November 2010 16:35:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Spds and Erds Removed from Service for Maintenance | On 11/3/10 at 1235 EDT Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) were removed from service to support activities for a planned maintenance outage on the UPS vital bus power supply. The duration of work is expected to be approximately 48 hours. During this time, the majority of the Control Room indications remain available to the plant staff, and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems, if needed. The plant is currently in Mode 5, and will remain in Mode 5, for the duration of the SPDS and ERDS unavailability. Since the unavailability will last greater than 8 hours, this is considered a Loss of Emergency Assessment Capability, and reportable under 10CFR50.72(b)(3)(xiii). Follow-up notification will be made when SPDS and ERDS have been restored. * * * UPDATE TO PETE SNYDER FROM MARK EGHIGIAN AT 1414 EDT ON 11/6/2010 * * * Update to event # 46388: on 11/6/2010 at 1000 EDT, regarding SPDS and ERDS system removed from service to support planned outage on the UPS vital power supply. Planned work which resulted in the removal from service of the SPDS and ERDS has been completed. All emergency assessment capabilities have been restored. The licensee notified the NRC Resident Inspector. Notified R3DO (Giessner). | Emergency Response Data System Safety Parameter Display System | |
| ENS 46436 | 24 November 2010 20:15:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Safety Parameter Display System and Emergency Response Data System Out of Service for Planned Maintenance | On 11/24/10 at 1515 EST, the Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) were removed from service to support activities for a planned maintenance outage on the UPS vital bus power supply. The duration of work is expected to be approximately 48 hours. During this time, the majority of the Control Room indications remain available to the plant staff, and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems, if needed. The plant is currently in Mode 4, and will remain in Mode 4, for the duration of the SPDS and ERDS unavailability. Since the unavailability will last greater than 8 hours, this is considered a Loss of Emergency Assessment Capability, and reportable under 10CFR50.72(b)(3)(xiii). Followup notification will be made when SPDS and ERDS have been restored. The licensee notified the NRC Resident Inspector.
Update to Event #46436: On 11/26/10 at 1733 EST, regarding Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) systems removed from service to support planned maintenance on the UPS vital bus power supply. Planned work which resulted in the loss of SPDS and ERDS is complete. All Emergency Assessment Capabilities have been restored. The licensee informed the NRC Resident Inspector. Notified R3DO (Dickson). | Emergency Response Data System Safety Parameter Display System | |
| ENS 47530 | 16 December 2011 15:17:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Safety Parameter Display System and Emergency Response Data System | At 1017 EST on December 16, 2011, a loss of the Safety Parameter Display System (SPDS) and the Emergency Response Data System (ERDS) occurred due to a process computer malfunction. This loss in capability is being reported as a loss of assessment capability in accordance with 10 CFR 50.72(b)(3)(xiii). Indications of related plant variable are available in the Main Control Center. The Visual Annunciator System (VAS) remains functional. Meteorological and process effluent radiological monitor indications are available and dose assessment capability is available and tested functional. In the event of a plant emergency, the Emergency Plan can be implemented as assessment capabilities are available under alternate means. The NRC Resident Inspector has been informed.
At 2235 EST on December 16, 2011, the Safety Parameter Display System (SPDS) and the Emergency Response Data System (ERDS) were restored following the correction of the process computer malfunction. This loss in capability was reported under a loss of assessment capability in accordance with 10 CFR 50.72(b)(3)(xiii). The licensee has notified the NRC Resident Inspector. R3DO (Dickson) notified. | Emergency Response Data System Safety Parameter Display System | |
| ENS 47594 | 14 January 2012 12:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Response Data System Removed from Service for Maintenance | At 0700 EST on January 14, 2012, Fermi 2 removed the Emergency Response Data System (ERDS) from service to facilitate planned maintenance on the associated power bus. The Technical Support Center (TSC) will also be unavailable during the planned power outage. The duration of the outage is expected to be 11 hours. This loss in capability is being reported as a loss of assessment capability in accordance with 10 CFR 50.72(b)(3)(xiii). Indications of related plant variables are available in the Main Control Center. The Visual Annunciator System (VAS) remains functional. Meteorological and process effluent radiological monitor indications are available and dose assessment capability is available. In the event TSC activation is required, the Emergency Operations Facility (EOF) will be used for the TSC function. Use of the EOF as the backup TSC is part of Fermi 2's Radiological Emergency Response Preparedness Plan. The Emergency Callout System (ECOS) is designed to, facilitate contacting TSC personnel to respond directly to the EOF. Information normally provided by ERDS can be transmitted via the notification system as described in the Radiological Emergency Response Preparedness Plan. In the event of a plant emergency, the Emergency Plan can be implemented as assessment capabilities are available under alternate means. The licensee notified the NRC Resident Inspector.
At 1835 EST, during restoration from planned maintenance, a failure of an electrical auto throwover device occurred, preventing restoration of power to ERDS and the TSC. Investigation of the failure and necessary repairs are in progress. At this time, it is unknown when availability of ERDS and the TSC will be restored. An update will be made to the NRC Operations Center when ERDS and the TSC are restored. The NRC Senior Resident Inspector has been notified. Notified the R3DO (Orth).
At 0127 EST on January 16, 2012 the Emergency Response Data System (ERDS) was restored and the Technical Support Center (TSC) is available as an emergency response facility, following restoration of the associated power bus. The licensee notified the NRC Resident Inspector. Notified the R3DO (Orth). | Emergency Response Data System | |
| ENS 47800 | 3 April 2012 09:24:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Spds and Erds Removed from Service for Planned Maintenance | On 4/03/12 at 0524 EDT, the Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) were removed from service to support activities for a planned maintenance outage on the UPS vital bus power supply. The duration of work is expected to be approximately 80 hours. During this time, the majority of the control room indications remain available to the plant staff, and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems, if needed. The plant is currently in Mode 5, and will remain in Mode 5, for the duration of the SPDS and ERDS unavailability. Since the unavailability will last greater than 8 hours, this is considered a Loss of Emergency Assessment Capability, and reportable under 10 CFR 50.72(b)(3)(xiii). Follow up notification will be made when SPDS and ERDS have been restored. The licensee has notified the NRC Resident Inspector.
At 0702 EDT on April 6, 2012, Safety Parameter Display System (SPDS) and Emergency Response Data System (ERDS) were restored, following restoration of the associated power bus. The licensee notified the NRC Resident Inspector. Notified the R3DO (Bloomer) | Emergency Response Data System Safety Parameter Display System | |
| ENS 48061 | 2 July 2012 12:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Spds and Erds Out of Service for Maintenance | Beginning July 2, 2012, at approximately 0800, the Fermi 2 Integrated Plant Computer System (IPCS) will be removed from service to support installation of a Cyber Security Modification. The Safety Parameters Display System (SPDS) and Emergency Response Data System (ERDS) reside on the IPCS platform and will be out of service when the IPCS is removed from service. These systems will be unavailable to the Control Room and all other Emergency Response Facilities (ERFs) for approximately 20 hours. By 0300 on July 3, 2012, it is planned to restore IPCS, including SPDS and ERDS, to the Control Room, Operational Support Center, the Technical Support Center, and alternate facilities. During this time dose assessment capability will only be available in the manual data input mode. The majority of the Control Room indications remain available to the plant staff, and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems as needed. A follow-up notification will be submitted when the IPCS is completely restored. This notification is being made per the requirements of 8 Hour Non-Emergency Notification 10 CFR 50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability. The licensee has notified the NRC Resident Inspector.
On July 3, 2012, at 01:00, the Fermi 2 Integrated Plant Computer System (IPCS) has been returned to service. Emergency assessment capabilities have been restored to all onsite emergency response facilities. Due to equipment problems, the Cyber Security Modification was not installed and the original IPCS configuration was restored. The licensee has notified the NRC Resident Inspector. R3DO (Daley) notified.
At approximately 02:04 on July 3, the Fermi 2 Integrated Plant Computer System (IPCS) failed. The Safety Parameters Display System (SPDS) and Emergency Response Data System (ERDS) reside on the IPCS platform. IPCS had previously been removed from service on 7/2/12 for a Cyber Security Modification and restored at 0100 on 7/3/12. At 0354, plant personnel were able to reboot IPCS and restore the system to normal with a Prime and Backup CPUs. Emergency assessment capabilities have been restored to all onsite emergency response facilities. This notification is being made per the requirements of 8 Hour Non-Emergency Notification 10 CFR 50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability. The licensee has notified the NRC Resident Inspector. R3DO (Daley) notified. | Emergency Response Data System | |
| ENS 48106 | 14 July 2012 06:06:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Unexpected Integrated Plant Computer System Failure | At approximately 0206 EDT on July 14, 2012, the Femi 2 Integrated Plant Computer System (IPCS) failed. The Safety Parameters Display System (SPDS) and Emergency Response Data System (ERDS) reside on the IPCS platform. At 0525 EDT, plant personnel were able to reboot IPCS and restore the system to normal with prime and backup CPUs. Emergency assessment capabilities have been restored to all onsite emergency response facilitates. This notification is being made per the requirements of 8 hour non-emergency notification 10 CFR 50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability. The licensee notified the NRC Resident Inspector. | Emergency Response Data System | |
| ENS 48123 | 21 July 2012 02:30:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Anticipatory Loss of Spds and Erds Due to Possible Loss of Integrated Plant Computer System During Troubleshooting | Beginning July 20, 2012, at approximately 2230, troubleshooting of MUX A components and fiber optic cables on the Fermi 2 Integrated Plant Computer System (IPCS) will be performed. A loss of IPCS during the troubleshooting is possible. The Safety Parameters Display System (SPDS) and Emergency Response Data System (ERDS) reside on the IPCS platform and will be out of service if IPCS is lost. These systems would be unavailable to the Control Room and all other Emergency Response Facilities (ERFs). During this time dose assessment capability would only be available in the manual data input mode. The majority of the Control Room indications will remain available to the plant staff, and would be used for emergency response, if needed. Information would be communicated to the NRC using other available communication systems as needed. A follow-up notification will be submitted when the IPCS troubleshooting is complete. This notification is being made per the requirements of 8 Hour Non-Emergency Notification 10CFR50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability. The licensee notified the NRC Resident Inspector.
Troubleshooting and repairs have been completed to the Fermi 2 Integrated Plant Computer System (IPCS) as of July 24, 2012 at 1855 (EDT). No loss of communication ability occurred from initial notification while repairs and restoration were in progress. Event 48123 is retracted. (The initial anticipatory) notification was made per 10 CFR 50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability. The licensee notified the NRC Resident Inspector. Notified the R3DO (Bloomer). | Emergency Response Data System | |
| ENS 48197 | 16 August 2012 18:58:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Integrated Plant Computer Failure | At approximately 1458 EDT on 8/16/12, a portion of the Fermi 2 Integrated Plant Computer System (IPCS) failed. This resulted in a loss of approximately 60 percent of data on the Safety Parameters Display System (SPDS). While IPCS and SPDS are not fully functional, the Emergency Plan can still be implemented if a plant emergency does occur, as assessment capabilities are available under alternate means. Repairs are in progress. A follow up message will be made when IPCS and SPDS are restored to fully functional status. This notification is being made pursuant to the requirements 10 CFR 50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability. The licensee has notified the NRC Resident Inspector.
At approximately 1458 EDT on 8/16/12, a portion of the Fermi 2 Integrated Plant Computer System (IPCS) failed. This resulted in a loss of approximately 60 percent of data on the Safety Parameters Display System (SPDS). At 2340 (EDT), plant personnel were able to restore full functionality of IPCS and SPDS, restoring full Emergency assessment capabilities to all onsite emergency response facilities. The licensee notified the NRC Resident Inspector. Notified the R3DO (Giessner). | ||
| ENS 48338 | 24 September 2012 08:07:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Response Data System Process Computer Data Server Failure | At 04:07 EDT on September 24, 2012, Fermi 2 experienced a failure of a data server within the Process Computer system. The failure of the data server does affect data input to the server providing information to the Emergency Response Data System (ERDS). ERDS is currently not receiving updated information from Fermi data systems. This loss in capability is being reported as a loss of assessment capability in accordance with 10 CFR 50.72(b)(3)(xiii). Indications of related plant variables are available in the Main Control Room. The Visual Annunciator System (VAS) and other portions of the Process Computer system remain functional. Meteorological and process effluent radiological monitor indications are available and dose assessment capability is available. Fermi 2 personnel will use normal phone communications to update NRC Operations Center in the case of an event declaration. Information normally provided by ERDS can be transmitted via the notification system as described in the Radiological Emergency Response Preparedness Plan. The licensee has notified the NRC Resident Inspector.
On September 24, 2012, Fermi experienced a failure of a data server within the process computer system which feeds data to Emergency Response Data System (ERDS), and report #48338 was made to the NRC. On October 6, 2012, corrective maintenance is complete, which repaired the data server and ERDS functionality is restored. The licensee has notified the NRC Resident Inspector. Notified R3DO (Valos). | Emergency Response Data System | |
| ENS 48451 | 29 October 2012 21:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Erds Lost Due to Process Computer System Data Server Failure | At 1700 EDT on October 29, 2012, Fermi 2 discovered a failure occurred with a data server within the Process Computer system at 0115 EDT on October 28, 2012. The failure of the data server affects data input to the server providing information to the Emergency Response Data System (ERDS). ERDS is currently not receiving updated information from Fermi data systems. This loss in capability is being reported as a loss of assessment capability in accordance with 10 CFR 50.72(b)(3)(xiii). Indications of related plant variables are available in the Main Control Room. The Visual Annunciator System (VAS) and other portions of the Process Computer system remain functional. Meteorological and process effluent radiological monitor indications are available and dose assessment capability is available. Fermi 2 personnel will use normal phone communications to update NRC Operations Center in the case of an event declaration. Information normally provided by ERDS can be transmitted via the notification system as described in the Radiological Emergency Response Preparedness Plan. Fermi 2 will notify the NRC when ERDS is returned to service. The licensee has notified the NRC Resident Inspector.
This is a follow up to EN #48468 & EN #48451. On October 29, 2012, Fermi experienced a failure of a data server within the process computer system which feeds data to Emergency Response Data System (ERDS), and EN #48451 was made to the NRC. On November 1, 2012, planned maintenance for Cyber Security Modification began which removed ERDS, SPDS, and IPCS from service, and EN #48468 was made to the NRC. On November 9, 2012, planned maintenance on ERDS, SPDS, and IPCS is complete, restoring full emergency assessment capabilities to all onsite emergency response facilities (EN #48468). The maintenance also repaired the data server within the process computer system which feeds data to ERDS (EN #48451). The licensee has notified the NRC Resident Inspector. Notified R3DO (Lipa). | Emergency Response Data System | |
| ENS 48468 | 1 November 2012 12:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Integrated Plant Computer System Out-Of-Service Outside the Control Room for Planned Maintenance | Beginning November 01, 2012, at approximately 1000 (EDT), the Fermi 2 Integrated Plant Computer System (IPCS) will be removed from service outside of the Control Room to support installation of a Cyber Security Modification. The Safety Parameters Display System (SPDS) and Emergency Response Data System (ERDS) reside on the IPCS platform and will be out of service when the IPCS is removed from Emergency Response Facilities (ERFs). These systems will be unavailable to all Emergency Response Facilities (ERFs) for approximately 196 hours. By 1600 (EDT) on November 9, 2012 it is planned to restore IPCS, including SPDS and ERDS, to the Operational Support Center, the Technical Support Center, and alternate facilities. During this time dose assessment (Raddose) capability will only be available in the manual data input mode. The SPDS indications and Raddose remain available to the plant staff in the Control Room, and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems as needed. A follow-up notification will be submitted when the IPCS is completely restored. This 8-hour non-emergency notification is being made per the requirements of 10 CFR 50.72(b)(3)(xiii), as an event that results in a major loss of emergency assessment capability. ERDS previously reported out of service under event number EN 48451 . The licensee informed the NRC Resident Inspector.
This is a follow up to EN #48468 & EN #48451. On October 29, 2012, Fermi experienced a failure of a data server within the process computer system which feeds data to Emergency Response Data System (ERDS), and EN #48451 was made to the NRC. On November 1, 2012, planned maintenance for Cyber Security Modification began which removed ERDS, SPDS, and IPCS from service, and EN #48468 was made to the NRC. On November 9, 2012, planned maintenance on ERDS, SPDS, and IPCS is complete, restoring full emergency assessment capabilities to all onsite emergency response facilities (EN #48468). The maintenance also repaired the data server within the process computer system which feeds data to ERDS (EN #48451). The licensee has notified the NRC Resident Inspector. Notified R3DO (Lipa). | Emergency Response Data System | |
| ENS 48887 | 4 April 2013 08:06:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Failure of the Integrated Plant Computer System | At 0406 (EDT) on April 4, 2013, the Fermi 2 Integrated Plant Computer System (IPCS) failed. This resulted in a loss of approximately 60 percent of data on the Safety Parameters Display System (SPDS). While IPCS and SPDS are not fully functional, the Emergency Plan can still be implemented if a plant emergency does occur, as assessment capabilities are available under alternate means. Investigation is in progress. A follow up message will be made when IPCS and SPDS are restored to fully functional status. This notification is being made per the requirements of 8 Hour Non-Emergency Notification 10CFR50.72(b)(3)(xiii), any event that results in a major loss of emergency assessment capability. The licensee has notified the NRC Resident Inspector.
At 1627 (EDT) on April 4, 2013, plant personnel were able to restore full functionality of IPCS and SPDS. This restored full assessment capabilities to all onsite emergency response faculties. The licensee notified the NRC Resident Inspector. Notified the R3DO (Daley). | ||
| ENS 49851 | 23 February 2014 17:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Integrated Plant Computer System Removed from Service for Planned Maintenance | (On) February 23, 2014, at approximately 1200 (EST), the Fermi 2 Integrated Plant Computer System (IPCS) was removed from service outside of the Control Room to support planned system maintenance. The Safety Parameters Display System (SPDS) and Emergency Response Data System (ERDS) reside on the IPCS platform and (was rendered) out of service when the IPCS (was) removed from Emergency Response Facilities (ERFs). These systems will be unavailable to all Emergency Response Facilities (ERFs) for approximately 50 hours. During this time, dose assessment (Raddose) capability will only be available in the manual data input mode. The SPDS indications and Raddose remain available to the plant staff in the Control Room, and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems as needed. A follow-up notification will be submitted when the IPCS is completely restored, including SPDS and ERDS, to the Operational Support Center, the Technical Support Center, and alternate facilities. This 8-hour non-emergency notification is being made per the requirements of 10 CFR 50.72(b)(3)(xiii), as an event that results in a major loss of emergency assessment capability. The licensee has notified the NRC Resident Inspector.
The following update was received from the licensee: On February 23, 2014, at approximately 1200 (EST), the Fermi 2 Integrated Plant Computer System (IPCS) was removed from service to support planned system maintenance. The Safety Parameters Display System (SPDS) and Emergency Response Data System (ERDS) reside on the IPCS platform and were out of service when IPCS was removed from service. On March 15, 2014 at approximately 0800 (EDT), planned maintenance on ERDS, SPDS, and IPCS is complete, restoring full Emergency assessment capabilities to the control room and all onsite emergency response facilities. The licensee informed the NRC Resident Inspector. Notified R3DO (Passehl). | Emergency Response Data System | |
| ENS 51516 | 5 November 2015 15:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Integrated Plant Computer System Removed from Service | On November 5, 2015 at approximately 1000 EST, the Fermi 2 Integrated Plant Computer System (IPCS) was removed from service for planned maintenance on the Uninterruptible Power Supply (UPS) vital bus power supply. The Safety Parameter Display System (SPDS) resides on the IPCS platform and will be out of service and unavailable to Emergency Response Facilities (ERFs) during the time that IPCS is removed from service. The duration of work is expected to be approximately 48 hours. During this time dose assessment (Raddose) capability will only be available in the manual data input mode. The majority of the Control Room indications remain available to the plant staff and will be used for emergency response, if needed. Information will be communicated to the NRC using other available communication systems as needed. A follow-up notification will be submitted when the IPCS is completely restored, including SPDS to the Operational Support Center, the Technical Support Center, and alternate facilities. The plant is currently in Mode 5, and will remain in Mode 5, for the duration of the IPCS and SPDS unavailability. This 8-hour non-emergency notification is being made per the requirements of 10 CFR 50.72(b)(3)(xiii), as an event that results in a major loss of emergency assessment capability, as described in NEI 13-01. The NRC Resident Inspector has been notified. | Safety Parameter Display System | |
| ENS 53562 | 24 August 2018 04:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Inoperable Seismic Monitoring System | At 0745 EDT on August 24, 2018, the Active Seismic Monitoring System failed a planned surveillance test and was declared inoperable. Compensatory measures to provide alternative methods for event classification of a seismic event have been implemented in accordance with the Fermi 2 Emergency Plan procedures. The compensatory measures include the use of information provided by the United States Geological Survey (USGS) to confirm if an earthquake has occurred within a 100 mile radius. The loss of the Active Seismic Monitoring System is reportable to the NRC within 8 hours of discovery in accordance with 10CFR50.72(b)(3)(xiii). No seismic activity has been felt onsite and the USGS recorded no seismic activity in the area. The NRC Resident Inspector bas been notified.
After further review the Active Seismic Monitoring system was removed from service for planned maintenance for a duration less than 72 hours with appropriate compensatory measures established. Therefore, no major loss of emergency assessment capability occurred. In addition, the surveillance tests were re-performed and the Active Seismic Monitoring System was declared Operable. Therefore, no reportable condition existed and EN 53562 reported on August 24, 20I8 is being retracted. The NRC Resident Inspector has been notified. Notified the R3DO (Hanna). | ||
| ENS 53825 | 14 January 2019 05:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Active Seismic Monitoring System Inoperable | On 01/11/2019 at 0958 EST, the Fermi 2 Active Seismic Monitoring system was taken out of service for planned maintenance. During the maintenance activity, the Active Seismic Monitoring System failed a planned surveillance test and was not restored to operability within 72 hours. Compensatory measures to provide alternative methods for event classification of a seismic event were implemented in accordance with the Fermi 2 Emergency Plan procedures prior to the start of the planned maintenance outage. The planned outage time to restore operability exceeded 72 hours on January 14th, 2019, at 0958 EST. Repairs have been completed, the Active Seismic Monitoring System has been declared Functional at 1037 EST, January 14th, 2019, and declared Operable at 1109 EST, January 14th, 2019. The loss of the Active Seismic Monitoring System is reportable to the NRC within 8 hours of discovery in accordance with 10 CFR 50.72(b)(3)(xiii). No seismic activity has been felt onsite and the United States Geological Survey (USGS) recorded no seismic activity in the area. The NRC Resident Inspector has been notified. Femi 2 has two seismic monitors, one on the Reactor Pressure Vessel Pedestal and one in the High Pressure Core Injection (HPCI) room. Only the HPCI room monitor was inoperable. | Reactor Pressure Vessel | |
| ENS 56650 | 1 August 2023 13:55:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Active Seismic Monitoring System Inoperable | The following information was provided by the licensee via email: On 08/01/2023 at 0955 EDT, the Fermi 2 active seismic monitoring system provided indication of a potential seismic activity event. Plant abnormal procedures were entered, and compensatory measure were met and remain in place. Neither the (United States Geological Survey) (USGS) nor the next closest nuclear power plant could confirm or validate the readings obtained at Fermi. The seismic monitoring system was declared nonfunctional to validate the calibration of the system. Femi 2 has two active seismic monitors: one on the reactor pressure vessel pedestal and one in the high-pressure core injection (HPCI) room. Only the HPCI room accelerometer was declared inoperable. The HPCI accelerometer is the sole 'trigger' for the seismic recording system, which outputs peak accelerations experienced during a seismic event. This is used in assessment of the magnitude of an earthquake for EAL HU 2.1. The loss of the active seismic monitoring system is reportable to the NRC within 8 hours of discovery in accordance with 10 CFR 50.72(b)(3)(xiii). No seismic activity has been felt onsite and the USGS recorded no seismic activity in the area. The NRC Resident Inspector has been notified. | Reactor Pressure Vessel |