Semantic search
| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 50945 | 1 April 2015 19:40:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Emergency Operating Facility Electrical Power and Phone System | At 1210 CDT the transformer supplying power to the Emergency Operating Facility (EOF) stopped working due to the failure of a capacitor bank. The EOF is located adjacent to OPPD's (Omaha Public Power District) North Omaha facility, approximately 17 miles south of Fort Calhoun Station. The event caused a small grass fire which was quickly extinguished. The local fire department was called. The backup emergency diesel generator for the EOF started and supplied power to the facility, as designed. With the EOF diesel operating, the facility is able to function as required during emergency conditions. At 1440 CDT the EOF emergency diesel generator stopped running. At 1545 CDT the Conference Operations (COP) network phone system failed. The COP network is the primary emergency notification system between OPPD, state and county agencies. It is used to provide initial and updated notifications and for general information flow between these agencies. Alternate means of communication have been established (commercial lines) and a dedicated communicator is stationed in the control room to ensure that we can facilitate communication should the need arise. Power to the EOF was restored at 1713 CDT. At time 1720 CDT the COP tested as normal. The licensee notified the NRC Resident Inspector. | Emergency Diesel Generator | |
| ENS 49027 | 13 May 2013 15:10:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Planned Outage of Sirens Due to Scheduled Upgrades | Planned intermittent outages of all FCS sirens will occur the week of 5/13/13-5/17/13 due to scheduled upgrades to the radio system. Based on the planned maintenance, all sirens for the Alert Notification System within the Emergency Planning Zone (EPZ) will be nonfunctional for various amounts of time. Prior notifications and coordination with Local Law Enforcement will be completed with compensatory measures established prior to work each day to support notification of the public in case of an actual emergency during the scheduled maintenance. Updates will be made to the NRC on 5/13/13 when the work starts, and upon completion of the work not to exceed 5/17/13. Work is currently scheduled to be complete 5/17/13. Also, contingencies have been established to back out if required in support of the plant or Law Enforcement activities. Work is scheduled to commence today, 5/13/13, at 10:10 AM. This is being reported per 10CFR50.72(b)(3)(xiii) for 'Any event that results in a major loss of emergency assessment capability, off site response capability, or communications capability.' The licensee notified the NRC Resident Inspector.
The work was completed on 5/16/2013 at 1700 CDT. The licensee notified the NRC Resident Inspector. Notified the R4DO (Walker). | ||
| ENS 48994 | 3 May 2013 10:20:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Outage of Ft. Calhoun Station Sirens for Planned Maintenance | A planned outage of all FCS (Ft. Calhoun Station) sirens will occur today at 0530 CDT to transfer in-service zone controllers. During the planned maintenance, all sirens for the Alert Notification System within the Emergency Planning Zone (EPZ) are nonfunctional. Prior notifications and coordination with Local Law Enforcement have been completed with compensatory measures established to support notification of the public in case of an actual emergency during the scheduled maintenance. The licensee has notified the NRC Resident Inspector, Washington, Harrison, and Pottawattamie counties.
The maintenance has been completed and the EPZ sirens have been returned to service. Local Law Enforcement has been notified that the scheduled maintenance is complete and the primary method of alerting the public with sirens is restored. The licensee has notified the NRC Resident Inspector. Notified R4DO (Haire). | ||
| ENS 48705 | 29 January 2013 15:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Alert Notification System Sirens Will Be Disabled for Planned Maintenance | A planned outage of all Fort Calhoun Station sirens is to occur at 0900 CST today to replace router power supplies. Based on the planned maintenance, all sirens for the Alert Notification System within the Emergency Planning Zone (EPZ) will be nonfunctional. Prior notifications and coordination with Local Law Enforcement have been completed with compensatory measures established to support notification of the public in case of an actual emergency during the scheduled maintenance. The planned maintenance is expected to take three hours with a projected completion time of 1200 CST. Contingencies have been established with the maintenance to back out if required in support of Law Enforcement activities. This is being reported per 10 CFR 50.72(b)(3)(xiii) for 'Any event that results in a major loss of emergency assessment capability, off site response capability, or communications capability.' The licensee has notified the NRC Resident Inspector and local authorities.
At 1159 CST, maintenance was completed with all sirens restored to functional status. Local Law Enforcement has been notified and relaxed required compensatory actions. The licensee will notify the NRC Resident Inspector. Notified R4DO (Walker). | ||
| ENS 48628 | 27 December 2012 20:45:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Scheduled Operations Support Center (Osc) Outage for Equipment Upgrade | Fort Calhoun Station (FCS) will be implementing a scheduled modification to renovate and upgrade the interior configuration of the site's Operational Support Center (OSC). The OSC is located within the Technical Support Center (TSC). The TSC will remain fully operable. Due to the construction, beginning on December 27, 2012 with a planned completion date of February 27, 2013, the OSC will be inoperable. An alternate OSC has been established on-site and is fully operable. The licensee notified the NRC Resident Inspector.
This is an update to Event Notification 48628, dated December 27, 2012. On March 8th, 2013, Fort Calhoun Station (FCS) will be entering a new phase of scheduled modifications to renovate and alter the interior configuration of its Technical Support Center (TSC). The TSC ventilation system will not be functional during this phase of modification. Combined with renovations, the primary TSC and OSC will be inoperable. An alternate OSC and TSC have been established. If the Emergency Response Organization is activated the alternate emergency facilities will be available for emergency responders per existing Emergency Plan procedures. The project is scheduled to be completed April 12, 2013. An update to this report will be provided when the TSC renovation is complete. The licensee informed the NRC Resident Inspector. Notified R4DO (Werner).
This is an update to Event Notification 48628, dated December 27, 2012. As of April 12th, 2013 Fort Calhoun Station has completed modifications to the Technical Support Center (TSC) and Operations Support Center (OSC). The TSC ventilation system has been proved functional through required testing. The primary TSC/OSC is now fully operational. The licensee notified the NRC Resident Inspector. Notified R4DO (Deese). | ||
| ENS 48485 | 7 November 2012 15:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Planned Outage of Emergency Sirens | A planned outage of all FCS (Fort Calhoun Station) sirens is to occur at 0900 CST today to replace required router power supplies. Based on the planned maintenance, all sirens for the Alert Notification System within the Emergency Planning Zone (EPZ) will be nonfunctional. Prior notifications and coordination with Local Law Enforcement have been completed with compensatory measures established to support notification of the public in case of an actual emergency during the scheduled maintenance. The planned maintenance is expected to take three hours with a projected completion time of 1200 CST. Also, contingencies have been established with the maintenance to back out if required in support of Law Enforcement activities. This is being reported per 10CFR50.72(b)(3)(xiii) for: 'Any event that results in a major loss of emergency assessment capability, off site response capability, or communications capability'. The licensee notified the NRC Resident Inspector and local counties.
At 1129 CST, maintenance was completed with all sirens restored to functional status. Local Law Enforcement has been notified and relaxed required compensatory actions. NRC Resident informed. Notified R4DO (Farnholtz). | ||
| ENS 48313 | 17 September 2012 13:58:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Emergency Sirens | At 0858 hrs. (CDT), Corporate Communications notified the control room that there was a communication issue with the emergency siren router. Based on the report, all sirens for the Alert Notification System within the Emergency Planning Zone (EPZ) were declared nonfunctional and notifications were completed. Local law enforcement has been notified in the required surrounding counties and compensatory measures are in place to ensure notification of the public in case of an actual emergency. Troubleshooting of the siren's communication system revealed that a peripheral router power supply had failed. The power supply was replaced at 0935 and router restarted. At 0955 sirens were restored to the counties of Harrison and Pottawattamie in Iowa. Communications were restored to all but one siren, in Washington County Nebraska by 1031, with that one siren (Siren 35) restored at 1103. All repairs completed and retested satisfactorily with proper communications confirmed with each siren. The power supply failure resulted in 2.1 hours with the sirens being unavailable. Notifications have been completed with compensatory actions by local law enforcement secured. This is being reported per 10CFR50.72(b)(3)(xiii) for 'Any event that results in a major loss of emergency assessment capability, off site response capability, or communications capability.' The licensee has notified the NRC Resident Inspector. | ||
| ENS 48148 | 1 August 2012 15:10:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Ens, Hpn, Pmc, and Rsc Phone Lines | At 0327 CDT, a call was received from the NRC Operations Center for Emergency Notification System (ENS) phone status check on the commercial phone line. The ENS phone system had no incoming rings, nor a dial-tone. The NRC Headquarters Operations Officer (HOO) was to submit a trouble ticket. At 0949 CDT, Emergency Planning personnel were working with Verizon Communications to determine the cause of the loss of the ENS phone. Verizon had isolated the problem to the American Broadband network and was working to resolve the problem. At 1010 CDT, Emergency Planning personnel identified that the Health Physics Network (HPN) line, the Protective Measures Counterpart (PMC) and Reactor Safety Counterpart (RSC) lines with the NRC had also been lost. The Conference Operations Network (COP) and all other commercial phone lines were functional and remained available. All areas were reachable by commercial phone lines. At 1022 CDT, the FCS Control Room was informed by Emergency Planning personnel of the communication means that were lost. The Emergency Plan per EPIP-OSC-1 was reviewed and verified no initiating conditions applied. At 1034 CDT, Emergency Planning personnel verified the communications problem with ENS, HPN, the Protective Measures Counterpart and Reactor Safety Counterpart lines was limited to the Fort Calhoun site. The Emergency Operations Facility (EOF) was not affected. At 1054 CDT, the ENS phone was restored to the FCS Control Room. This was verified by FCS placing a call to the NRC Operations Center. The NRC Operations Center then returned the call. All communications were satisfactorily restored. At 1132 CDT, the Protective Measures Counterpart line was restored. At 1142 CDT, the HPN and Reactor Safety Counterpart lines were restored. This is being reported per 10CFR50.72(b)(3)(xiii) for 'Any event that results in a major loss of emergency assessment capability, off site response capability, or communications capability.' The licensee notified the NRC Resident Inspector. | ||
| ENS 47721 | 6 March 2012 22:13:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Emergency Sirens Due to Router Power Supply Failure | At 1613 (CST), FCS (Fort Calhoun Station) Control Room was notified by corporate communications that 2 non-adjacent sirens out of 101 total sirens lost communication. These were Siren #1 at 1602 (CST) and Siren #50 at 1609 (CST) due to potential router issues. Required compensatory actions were established at 1630 (CST) for loss of the 2 sirens. Initial troubleshooting revealed radio communication failed at 1543 (CST) and manual testing of the remaining sirens was instituted. At 1643 (CST), corporate communications notified the Control Room initial testing on Siren #2 was not responding and indicative that all sirens were lost. Based on that report, all sirens for the Alert Notification System within the Emergency Planning Zone (EPZ) were declared nonfunctional and notifications were completed. Local Law Enforcement has been notified in the required surrounding counties to perform required actions in case of an emergency with the sirens unavailable. Compensatory measures are in place to ensure notification of the public by local law enforcement in case of an actual emergency. Troubleshooting of the siren's communication system revealed that a peripheral router dual power supply had failed at 1539 (CST) and has been replaced. All repairs completed and retested satisfactorily with proper communications confirmed with each siren. As of 1750 (CST), all sirens (were) restored to functional status. The power supply failure resulted in 2.2 hours with the sirens being unavailable. Notifications have been completed with compensatory actions by local law enforcement secured. This is being reported per 10CFR50.72(b)(3)(xiii) for, 'Any event that results in a major loss of emergency assessment capability, off site response capability, or communications capability'. The licensee notified the NRC Resident Inspector. | ||
| ENS 47696 | 24 February 2012 04:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of 21 Out of 101 Emergency Sirens | Communications has been lost to 21 sirens out of 101. The loss of communications does not allow the activation of the sirens. Almost all of Harrison County and Pottawattamie County in Iowa are without communications to the sirens. There are compensatory measures in place to ensure notification by local law enforcement in case of an actual emergency to inform the public in these areas. This is being reported per 10CFR50.72(b)(3)(xiii) for 'Any event that results in a major loss of emergency assessment capability, off site response capability, or communications capability'. An attempt is being made to reboot the siren's communication system in order to restore the sirens. During the reboot, sirens in Washington County, Nebraska, will also lose communications and therefore will not be functional. Local Law Enforcement has been notified in Washington County to perform compensatory measures in case of an emergency. The NRC Resident Inspector has been informed.
As of 0518 CST, communications has been reestablished and all sirens were returned to service. The licensee notified the NRC Resident inspector. Notified R4DO (Deese).
Following an investigation of the siren failure, it was determined that all sirens were lost for a period of time from approximately 1809 CST February 23, 2012 until 0518 CST February 24, 2012. The control room was notified at 0215 CST February 24, 2012 and compensatory measures were established for all affected counties in Iowa and Nebraska. No new compensatory measures or actions are or were required. The licensee has notified the NRC Resident Inspector. Notified R4DO (Haire). | ||
| ENS 47260 | 13 September 2011 13:22:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Technical Support Center Ventilation | VA-106, TSC HVAC Unit VA-107 Rooftop Condensing Unit, tripped off and attempts to restart were unsuccessful. The cause of VA-106 tripping is unknown at this time. Troubleshooting is in progress. This condition renders the Technical Support Center unavailable for Emergency Planning Responses. Approved compensatory actions are to relocate personnel to alternate facilities if required. This condition is being reported pursuant to 10 CFR 50.72(b)(3)(xiii) for Loss of Emergency Preparedness Capabilities. The licensee informed the NRC Resident Inspector.
TSC ventilation troubleshooting has been completed and the system was determined to be functional today, September 16, 2011 at 1115 CDT. The licensee notified the NRC Resident Inspector. Notified R4DO (Pick). | HVAC | |
| ENS 47202 | 26 August 2011 17:36:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Unavailable for Emergency Response | During performance of IC-PM-VA-0200, Preventive Maintenance Air Flow Measurement of TSC Air Filter Unit VA-119, it was discovered that the required flow-rate of 2700 cfm and minimum overpressure of 0.1 inches of water in the TSC could not be achieved. Troubleshooting on VA-107, TSC Air Handling Unit, is in progress. This condition renders the Technical Support Center unavailable for Emergency Planning Responses. Approved compensatory actions are to relocate personnel to alternate facilities if required. This condition is being reported pursuant to 10 CFR 50.72(b)(3)(xiii) for Loss of Emergency Preparedness Capabilities. The licensee has notified the NRC Resident Inspector. | ||
| ENS 47033 | 7 July 2011 18:40:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Loss of Power to 10 Emergency Sirens | Power has been removed from 10 (out of 101) sirens due to flooding conditions. (Three) out of 5 sirens in Pottawattamie county, 4 of 18 in Harrison county and 3 of 78 in Washington county. There are compensatory measures in place to ensure notification to any members of the public that may still be in these areas. The station is also suspending testing and reporting (performance indicator) data for these sirens in accordance with NEI 99-02. All of these sirens serve areas for which there are no residents requiring evacuation. This is being reported per 10CFR50.72(b)(3)(xiii)) for 'Any event that results in a major loss of emergency assessment capability, offsite response capability, or communications capability'. The licensee notified the States of Nebraska and Iowa, the Counties of Harrison, Washington and Pottawattamie and the NRC Resident Inspector of this report. | ||
| ENS 46929 | 6 June 2011 13:00:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Unusual Event Declared Due to River Level | At 0800 CDT a Notification of Unusual Event (HU 1, EAL 5) for operating mode less than 210 degrees F is being declared for a river level expected to exceed a 1004' MSL (Mean Sea Level), but less than or equal to 1009' MSL elevation. Currently Abnormal Operating Procedure AOP-1 is being implemented for high river level, as well as, PE-RR-AE-1001 for Flood Barrier and Sandbag Staging and Installation. This condition is being reported pursuant to 10 CFR 50.72(a)(1)(i) for declaration of an emergency class specified in the licensee's approved emergency plan. Applicable governmental agencies have been notified per plant procedures. No press release is expected at this time. * * * UPDATE FROM ERICK MATZKE TO PETE SNYDER AT 1121 EDT ON 6/6/2011 * * * During the emergency notification the automated paging function did not cause the pagers to actuate. The issue is being investigated." A notification for 10 CFR 50.72(b)(3)(xiii) be added to the header. Notified R4DO (Whitten).
OPPD will be making a press release for this event at about 1220 CDT. The licensee will be notifying the NRC Resident Inspector. Notified R4DO (Whitten) and HQPAO (Brenner).
At 1342 CDT on 08/29/11, FCS (Fort Calhoun Station) terminated the Notification of Unusual Event for flooding. Missouri river level receded to less than entry criteria and is currently 1003.56 ft MSL. The licensee has notified the State of Nebraska, Harrison County, Washington County, and Pottawattamie County of the termination. Notified R4DO (Proulx), IRD (Marshall), NRR (Thorp), DHS (Rickerson), and FEMA (Dennis). | ||
| ENS 46795 | 27 April 2011 23:00:00 | 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 | Emergency Sirens Intermittently Inoperable Due to Upgrading | Fort Calhoun Station is improving (upgrading) the emergency siren system. This evening during the upgrade the sirens will be inoperable for a short period between 1830 and 2400 today. Fort Calhoun will inform the HOO when the sirens are returned to operation following this evenings maintenance. The licensee notified the states of Nebraska and Iowa and local authorities in both states of the siren outage.
The emergency siren system maintenance was complete and all sirens were restored to service at 0010 CDT on 4/28/11. The licensee notified the states and local authorities. Notified R4DO (Powers).
Fort Calhoun Station is improving (upgrading) the emergency siren system. Today during the upgrade, the sirens will be inoperable for a short period between 1130 CDT and 1210 CDT today. Fort Calhoun will inform the HOO when the sirens are returned to operation following this maintenance. Notified R4DO (Powers), State and local government.
The emergency siren system maintenance was complete and all sirens were restored to service at 1150 CDT on 4/28/11. The licensee notified the states and local authorities.
Continuing maintenance on the sirens determined that they are not responding correctly. Troubleshooting is in progress. There is not an estimated time to return the sirens to service at this time. Emergency planning personnel have been contacted and contingency actions are in place. The station will contact the HOO when the issue is resolved. Notified R4DO (Powers).
The emergency siren system maintenance was complete and all sirens were restored to service at 1529 CDT on 4/28/11. The licensee notified the states and local authorities. Notified R4DO (Powers).
Fort Calhoun Station is improving (upgrading) the emergency siren system. Today during the upgrade, the sirens are anticipated to be inoperable for an hour or two during the period between 0755 (CDT) and 1000 (CDT) today. The emergency planning staff has been informed and compensatory measures are in place. Fort Calhoun will inform the HOO when the sirens are returned to operation following this maintenance. The licensee notified the states and local authorities, as well as the NRC Resident Inspector. Notified R4DO (Powers).
The emergency siren system maintenance was complete and all sirens were restored to service at 1030 CDT on 4/29/11. The licensee notified the states and local authorities. Notified R4DO (Powers). | ||
| ENS 46742 | 8 April 2011 11:27:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Inoperable | Technical Support Center (TSC) was non-functional due to inability to maintain pressure boundary for function of the TSC HVAC system. This morning the latch to one of the doors to the TSC was discovered broken. The door would not latch shut. The station has repaired the door. Compensatory measures were in place for the nonfunctional facility. The TSC is now functional. The NRC Resident Inspector has been notified. | HVAC | |
| ENS 46642 | 19 February 2011 17:35:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Operations Facility (Eof) Without Power | Recently obtained information determined that on Saturday February 19, 2011, there was a power loss to the Emergency Operations Facility (EOF) at North Omaha. The power loss lasted from 1135 to 1220 CST. The EOF Building was without power for that time period. The backup generator did not start. There was an electrical line down in the area. While performing preventive maintenance on the EOF Generator on Wednesday February 23, 2011, the technician determined that the EOF generator would not function. Maintenance personnel were contacted to troubleshoot the generator problem. The battery was determined to be defective and was replaced. The EOF generator was tested satisfactory. The EOF is required to be activated within one hour when required. The emergency plan does have provisions for an alternate to the EOF if required. The NRC Resident Inspector has been notified. | ||
| ENS 46490 | 19 December 2010 06:08:00 | 10 CFR 50.72(a)(1)(i), Emergency Class Declaration 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Quickly Concluded Notice of Unusual Event Due to a Loss of Communications | At 2355 CST, on 12/18/2010, the Control Room was notified by security of the inability of offsite personnel to call into the plant. (At) 0008 CST, on 12/19/2010, the control room verified that the ENS Phone, Conference Operation Network (COP), Security Building, Training Center, and Blair Phone Lines were not functional. At 0011 CST, a Notice of Unusual Event (NOUE) was declared per IC SU6 EAL 2. This also meets the criteria for a Major Loss of Communications Capability under 10 CFR 50.72(b)(3)(xiii). At 0028 CST, the control room was notified by security that Huntel Communications was attempting to correct the communications issue. At 0030 CST, the COP phone was restored. At 0046 CST, the ENS phone was verified to be functional. At 0050 (CST), the criteria to exit the NOUE (was met) and the event was terminated. At 0059 (CST), the NRC Senior Resident Inspector was notified. The state and local agencies were notified. The NRC Operations Center conducted a satisfactory test of the ENS line. | ||
| ENS 46324 | 11 October 2010 16:10:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Oos for Maintenance | This is an eight-hour report as required per 10 CFR 50.72(b)(3)(xiii) due to maintenance which will result in the Fort Calhoun Station Technical Support Center (TSC) being degraded. On Monday, October 11th scheduled maintenance will commence on the TSC Air Handling unit that will render the unit non-functional. This maintenance is scheduled to be completed on Thursday, October 14th. Station procedures contain compensatory measures to ensure appropriate habitability monitoring and, if necessary, relocation of TSC personnel should the need exist to activate the emergency response organization. The NRC Resident Inspector has been notified.
At 1519 CDT, the TSC Air Handling Unit was returned to service and is functional. The licensee will notify the NRC Resident Inspector. Notified R4DO (Haire). | ||
| ENS 46254 | 15 September 2010 22:40:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Both Containment Hydrogen Analyzers Out of Service Due to Failed Surveillances | At 1740 CDT, VA-81A, Hydrogen Analyzer Panel, was declared not functional due to failing surveillance test OP-ST-VA-0006, Containment Hydrogen Monitor Monthly Check. VA-81B, Hydrogen Analyzer Panel, was previously not functional due to performance of surveillance test IC-ST-VA-0033, 18 Month Channel Calibration of Containment Hydrogen Analyzer, VA-81B. This results in no Hydrogen Analyzers being available to monitor containment, which prevents being able to assess for potential loss of containment barrier for Emergency Action Level purposes via the containment hydrogen greater than 3% method. USAR (Updated Safety Analysis Report) section 9.10.2.5 allows for both Hydrogen Analyzers to be out of service for up to 72 hours. The licensee informed the NRC Resident Inspector.
Fort Calhoun Station had previously reported that the loss of both hydrogen monitors on September 15, 2010, constituted a major loss of emergency response assessment capability. Additional investigation has determined that other methods of assessment were available that would have provided sufficient indication to make the proper emergency classification. Therefore, this event is being retracted. The licensee has notified the NRC Resident Inspector. Notification was sent to R4DO (Thomas Farnholtz). | ||
| ENS 45849 | 17 April 2010 01:30:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Inoperable Due to Hvac Failure | At 2030 CDT (on 4/16/10), the Technical Support Center ventilation system was found not running. The cause for the failure of the Technical Support Center ventilation system is not known at this time. This condition renders the Technical Support Center unavailable for emergency planning responses. Alternate facilities are available. This condition is being reported pursuant to 10 CFR 50.72(b)(3)(xiii) for Loss of Emergency Preparedness Capabilities. The licensee notified the NRC Resident Inspector.
As of April 17, 2010 at 12:00 CDT, the Technical Support Center is once again available for Emergency Planning Responses. The cause of the failure was a broken belt on the TSC Air Handling Unit. This belt has been replaced. The licensee notified the NRC Resident Inspector. Notified R4DO (Spitzberg). | ||
| ENS 45822 | 8 April 2010 13:30:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Paging System Outage | At about 0830 CDT on 4/8/2010, it was discovered that the station paging system was not operating. Repair efforts were initiated. The Control Room and station personnel were notified of the pager outage. The automated callout system is available to notify the emergency response organization during the pager outage if needed. That pager system was returned to service at about 1005 CDT 4/8/10. The NRC Resident Inspector has been informed. | ||
| ENS 45731 | 26 February 2010 14:30:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | In-Plant Paging System Out of Service | At about 0830 CST on 2/26/2010 , it was discovered that the station paging system was not operating. Repair efforts were initiated. The Control Room and station personnel were notified of the pager outage. The automated callout system is available to notify the emergency response organization during the pager outage if needed.
The station paging system was restored to operable status at 1400 CST. The licensee will notify the NRC Resident Inspector. Notified the R4DO(Lantz). | ||
| ENS 45615 | 8 January 2010 19:29:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Sirens May Be Impacted by Extreme Weather Conditions | The current NOAA weather forecast for the station is predicted to be about -25 degrees Fahrenheit (on the morning of January 9, 2010). Based on this forecast, the station reviewed the impact of these temperatures on the 101 sirens in the Fort Calhoun Station 10-mile Emergency Planning Zone (EPZ). The siren manufacturer's and the FEMA approved siren design report information states that the sirens (Federal Signal model 2001) are designed for operation between the temperature readings of -22 degrees Fahrenheit and +140 degrees Fahrenheit. Event Numbers 44782 and 44783, on a similar condition at another utility having the same sirens, were reviewed. It was noted that the reports documented discussion with the manufacturer's technical representative confirming that the sirens are operational and no special testing is required when the temperature goes below and then returns within the operating temperature limits. The current temperature at the station is within the operational limits. Therefore, the 101 sirens are considered functional at this time. The following agencies were notified that if the temperature falls below a negative twenty-two degrees Fahrenheit, the established process of back-up route alerting is to be used notifying the public in the event of a nuclear emergency where the sirens are activated but fail to respond: -Washington County, NE Emergency Management -Pottawatomie County, IA Emergency Management -Harrison County, IA Emergency Management This notification is being made in accordance with 10 CFR 50.72(b)(3)(xiii). No media press release is being made. The licensee has notified the NRC Resident Inspector.
A review of area temperature indicates that the siren design was not exceeded. The licensee will be notifying the NRC Resident Inspector. Notified R4DO (Hagar). | ||
| ENS 45468 | 26 October 2009 15:50:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Station Paging System Out of Service | At about 1050 CDT on 10/26/2009, it was discovered that the station paging system was not operating. Repair efforts were initiated. The Control Room was notified of the pager outage. The automated callout system was available during the pager outage. Investigation determined that the paging system was nonfunctional as early as 0900 the same day. Repair efforts were successful and the pager system was returned to operation about 1230 CDT. The licensee notified the NRC Resident Inspector. | ||
| ENS 45389 | 29 September 2009 20:09:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Unavailable for Emergency Planning Responses | At 15:09 CDT, today the Technical Support Center ventilation system stopped running. The cause for the failure of the Technical Support Center ventilation system is suspected to be an interlock between the fire detection system and the ventilation unit. The cause of the this condition renders the Technical Support Center unavailable for Emergency Planning Responses. Alternate facilities are available. This condition is being reported pursuant to 10 CFR 50.72(b)(3)(xiii) for Loss of Emergency Preparedness Capabilities." The licensee has notified the NRC Resident Inspector.
Technical Support Center ventilation system is now functional and is available for Emergency Planning Responses. The licensee has notified the NRC Resident Inspector. Notified R4DO (Mike Shannon) | ||
| ENS 45315 | 31 August 2009 05:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Sirens Inoperable | At 1546 CDT the control room at the Fort Calhoun Power Station was notified that a siren test conducted at 1440 CDT had failed. At this time none of the station's emergency sirens are capable of being sounded. Utility personnel are troubleshooting the problem and expect to restore siren capability. Compensatory measures have been implemented. The NRC will be notified when siren capability has been restored. Harrison and Pattawattamie counties in Iowa, and Washington county in Nebraska have been notified. The NRC resident inspector has been notified.
The licensee has reset a communications device that activates the sirens and restored operability to 38 out of the 103 total sirens around the site. To re-establish operability of the remaining sirens, the licensee will need to dispatch personnel to each siren to relink with the communications system. The time frame to complete this effort is estimated to be approximately 5 hours. The compensatory notification measures will remain in place until the sirens have been restored. The licensee will notify the Resident Inspector of this updated information.
The licensee has restored 101 of 103 total sirens to service. Two sirens that are not in service are currently not accessible. They will be automatically restored to service at approximately 0330 CDT and verified in the morning. The licensee has notified the Resident Inspector of this updated information. Notified R4DO (Farnholtz).
The licensee has restored all 103 of 103 total sirens to service. Harrison and Pattawattamie counties in Iowa, and Washington county in Nebraska have been notified. The licensee will notify the NRC Resident Inspector of this updated information. Notified R4DO (Farnholtz). | ||
| ENS 44323 | 27 June 2008 19:30:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Group Page Via Interactive Notification System Is Not Operational | On June 27, 2008 at 1430 CDT, Fort Calhoun Station (FCS) performed testing of the group paging system via the Interactive Notification System (INS) . The group page did not perform as designed. Further investigation and testing of the group page manually resulted in the same issue. It has been determined that the group page function is not operational. FCS has implemented backup manual callout process for the emergency response organization. Therefore emergency facility activation may take longer than normal. Troubleshooting efforts are ongoing. Licensee has notified NRC Resident Inspector.
Troubleshooting revealed a hard drive failure for the paging system. On June 27, 2008, the paging system was tested satisfactorily at 2145. System is fully functional. The licensee has notified the NRC Resident Inspector. Notified R4DO (Bywater). | ||
| ENS 44207 | 14 May 2008 10:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Siren Outage for Upgrade | Fort Calhoun Station will be experiencing a partial loss of emergency communications and notification capabilities on Wednesday, May 14, 2008. Omaha Public Power District will be completing an upgrade to the main radio system from approximately 05:00 - 09:00, Wednesday, May 14, 2008. During this time, mobility over the radio system (mostly rural use) and the Fort Calhoun Station Alert and Notification System (ANS) sirens will be out of service. Emergency Planning will notify the affected counties to have their back-up plan for the (alert and notification system) in place during that time. Post Maintenance Silent Testing will be performed upon completion of radio maintenance to verify siren communications. The licensee notified the NRC Resident Inspector.
The licensee reports that the siren outage commenced at approximately 0400 CDT this morning and is in progress. Currently, the estimated completion time for this activity is now approximately 1300 CDT today (5/14/08). R4DO (Powers) notified.
Update to Event Number 44207 - Fort Calhoun Unit 1 - Event Date 05/14/2008 - Emergency Sirens upgrade is complete. Post maintenance silence testing was performed. All sirens are functional. The NRC Resident Inspector, state, and local officials have been notified. Notified R4DO (Powers) | ||
| ENS 44084 | 20 March 2008 13:13:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Traffic Accident Causes Loss of Power to Ten Emergency Sirens | On March 20, 2008, between 0813 and 0818 power to 10 of the 78 sirens in Washington County was lost. They lost power due to a vehicle hitting a power pole. None of the 10 have battery back up power. The sirens are located south of the city of Fort Calhoun, in southeast Washington County. By 1200 power had been restored to 8 of the 10 sirens. The remaining sirens are awaiting replacement of power poles supporting supply lines to restore power. Pole replacement is in progress. The licensee notified the NRC Resident Inspector, state, and local officials. | ||
| ENS 44036 | 5 March 2008 06:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Fifteen Emergency Sirens Inoperable for a Time | On March 5, 2008, at 1312 CST, fifteen (15) emergency notification system sirens in the Fort Calhoun Station Emergency Planning Zone (eleven in Harrison County, Iowa, four in Pottawattamie County, Iowa) were de-energized due to a un-planned power outage. The loss of AC Power to these emergency notification sirens impacted 15 of 101 total sirens; 8 of which had DC Battery Backup Power. As a result, this event is being reported under 10 CFR 50.72 (b)(3)(xiii) and guidance in NUREG-1022 as a major loss of off-site communications capability (e.g. offsite notification system). Power was restored to 8 sirens, 4 in Harrison County and all 4 from Pottawattamie County on March 5, 2008 at 1413 hours. One siren in Harrison County was restored at 1417 hours. The remaining 6 sirens were restored at 1529 hours. The power loss was determined to be due to a farm equipment malfunction. The licensee notified the NRC Resident Inspector. | ||
| ENS 43943 | 30 January 2008 09:35:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Multiple Emergency Sirens Lost Power Due to Severe Weather | Due to severe weather (wind storm) in the area, a total of 8 of 78 sirens were reported out of service (loss of power) in Washington County, NE. An additional 6 sirens were running on their battery backup power supplies. The sirens have been returned to service. A large segment of the population was NOT affected. The licensee has notified the NRC Resident Inspector. | ||
| ENS 43181 | 22 February 2007 12:57:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Emergency Response Data System Inoperable | The licensee reported the loss of the Emergency Response Data System (ERDS) due to an Emergency Response Facility Computer System (ERFCS) failure at 0757 EST. The loss of the host computer was determined to be the cause of this unplanned outage. An unrelated planned outage of ERDS is scheduled to commence today following the troubleshooting. The planned outage duration will be 10 hours. The licensee will make an update notification when ERDS is restored. The licensee notified the NRC Resident Inspector.
The licensee reported the Emergency Response Data System (ERDS) has been restored to normal operation. The licensee notified the NRC Resident Inspector. | Emergency Response Data System | |
| ENS 42781 | 17 August 2006 14:00:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Phone Lines Out of Service for Maintenance | Phone line maintenance is occurring today 8/17/06. Maintenance starting at 0900 and is planned until 1600 hours. Line maintenance may impact ENS, HPN, and ERDS capabilities. An 8 hour notification per 10CFR50.72(b)(3)(xiii) is being made due to expected failures during line interruptions. Affected communications will be verified subsequent to completion of line maintenance. The licensee notified the NRC Resident Inspector.
The ENS and HPN lines were tested and declared operable at 16:55 CDT. The ERDS line was verified operable at 17:25 by sending plant data to the NRC. The licensee notified the NRC Resident Inspector. R4DO (Blair Spitzberg) notified. | ||
| ENS 42232 | 27 December 2005 13:30:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Technical Support Center Ventilation Inoperable | During an equipment operator rounds of the onsite Emergency Response Technical Support Center the access cover for the suction plenum of VA-107, Technical Support Center Air Handling Unit, was found removed and resting on the floor under the opening exposing a 2 ft X 2 ft opening. The as-found condition would have made the Technical Support Center ventilation System inoperable with respect to maintaining Technical Support Center personnel dose limits in a design basis accident. The air handling unit is located in a mechanical room outside the Technical Support Center envelope. With the access cover removed, air from the mechanical room would be drawn into the air handling unit and discharged into the Technical Support Center, in a design basis accident, the as-found condition would allow an undesirable amount of unfiltered air into the Technical Support Center envelope. This condition does not adversely affect the charcoal filtering unit, VA-119, from drawing outside air required to maintain the Technical Support Center in a positive pressure envelope. The cause of the access cover being removed could not be determined, the access cover was re-installed at 08:15 CST and a maintenance work document generated to verify proper operation of latches. This report is being made under 10 CFR 50.72(b)(3)(xiii) since the as-found condition impaired the licensee's ability to staff the Technical Support Center during an accident. Contingency actions are in place in the Emergency Plan to deal with the evacuation of the Technical Support Center. The licensee notified the NRC Resident Inspector. | ||
| ENS 42006 | 21 September 2005 23:22:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Partial Loss of Emergency Siren Capability in Harrison County Iowa Due to a Transformer Fire | Fort Calhoun Station was informed that 6 of the 18 emergency sirens located in Harrison County Iowa were rendered inoperable due to a fire affecting a transformer. Harrison County Sheriff department implemented the alternate notification method. Local utility responding to restore power anticipates a 4 hour outage duration. Power was reported to be restored at 2208 CST. Sirens will be verified on Thursday September 22, 2005. There was no indication of malevolent intent reported with respect to the cause of the fire. The licensee informed local authorities and the NRC Resident Inspector. | ||
| ENS 40351 | 24 November 2003 09:22:00 | 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Inability to Initiate Emergency Sirens from Emergency Operations Facility | At 0322 CST, on 11/24/2003, an alarm was received on the Alert Notification System. The system alarm is not necessarily indicative of a system fault. Normal procedure is to check the system at the start of the normal work day. When the system was tested at 0615 CST it was discovered that the emergency sirens could not be sounded from the Emergency Operations Facility (EOF). Troubleshooting efforts were begun. The repair crew discovered that the sirens are able to be sounded by their normal stations (the counties). The sirens were also able to be sounded by a remote unmanned alternate location (owned by the utility located in downtown Omaha). However, the EOF could not have verified which sirens had sounded. Verification of siren actuation was possible from the unmanned alternate location. Troubleshooting continues. The licensee has informed the NRC Resident Inspector. |