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| Entered date | Event description | |
|---|---|---|
| ENS 51103 | 29 May 2015 20:17:00 | This is non-emergency eight hour notification for a loss of Emergency Assessment Capability. This event is reportable in accordance with 10 CFR 50.72(b)(3)(xiii) as the discovered condition affects the functionality of an emergency response facility. A condition impacting functionality of the TSC (Technical Support Center) Ventilation system was discovered on 05/29/2015 at 1230 (EDT). The issue involves a loss of cooling capability of the TSC ventilation system due to a failed relay. Maintenance will begin repairs at 0700 (EDT) on 05/30/2015. Estimated time to repair is unknown at this time. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Coordinator will relocate the TSC staff to an alternate location in accordance with applicable site procedures. The Emergency Response Organization team will be notified of the condition and the possible need to relocate during an emergency. This condition does not affect the health and safety of the public or station employees. An update will be provided once the TSC ventilation has been restored to normal operation. The NRC Resident Inspector will be notified.
The TSC ventilation system has been returned to service. The licensee will notify the NRC Resident Inspector. Notified R2DO (Guthrie). |
| ENS 49956 | 24 March 2014 21:30:00 | This is a non-emergency eight hour notification for a loss of Emergency Assessment Capability. This event is reportable in accordance with 10 CFR 50.72(b)(3)(xiii) because the work activity affects the functionality of an emergency response facility. Planned maintenance activities are being performed on 03/24/14 starting at approximately 2300 (EDT) to the Technical Support Center (TSC) ventilation system. The work includes performance of planned carbon bed filter sample. The planned work activity duration is approximately 5 hours. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. The NRC Resident Inspector has been notified. This event poses no threat to the public or station employees.
The TSC was returned to service at 0325 EDT on 3/25/14. The licensee will be notifying the NRC Resident Inspector. Notified R2DO (Shaeffer). |
| ENS 49311 | 28 August 2013 03:20:00 | This is a non-emergency eight hour notification for a loss of Emergency Assessment Capability. This event is reportable in accordance with 10 CFR 50.72(b)(3)(xiii) because the work activity affects the functionality of an emergency response facility. Planned maintenance activities are being performed on 08/28/13 in the Technical Support Center (TSC) HVAC. The work includes performance of planned outside air intake valve electrical troubleshooting. The planned work activity duration is approximately 16 hours. If an emergency is declared requiring TSC activation during period, the TSC will be staffed and activated using existing emergency planning procedure unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. The Emergency Response Organization team has been notified of the maintenance and the possible need to relocate during an emergency. The NRC Resident Inspector has been notified. The event poses no threat to the public or station employees. |
| ENS 48878 | 2 April 2013 16:25:00 | This is a non emergency eight hour notification for a loss of Emergency Assessment Capability. This event is reportable in accordance with 10 CFR 50.72(b)(3)(xiii) because the work activity affects the functionality of an emergency response facility. Planned maintenance activities are being performed on 4/3/13 to be Technical Support Center (TSC) HVAC. The work includes removal of a pressurizing ventilation fan and opening ventilation system ductwork. The planned work activity duration is approximately 48 hours. If an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing emergency planning procedures unless the TSC becomes uninhabitable due to ambient temperature, radiological, or other conditions. If relocation of the TSC becomes necessary, the Emergency Director will relocate the TSC staff to an alternate location in accordance with applicable site procedures. The Emergency Response Organization team has been notified of the maintenance and the possible need to relocate during an emergency. The NRC Resident Inspector has been notified. The State of North Carolina will be notified. |
| ENS 48583 | 12 December 2012 19:57:00 | While attempting to swap Technical Support Center (TSC) power supplies the TSC air handling unit circuit breaker tripped rendering the TSC unavailable for emergency assessment. An emergent work order has been planned to restore the TSC air handling unit to operational status. The licensee has notified the NRC Resident Inspector. Licensee also notified state, local and other government agencies. |
| ENS 48502 | 12 November 2012 14:13:00 | This non-emergency event report is being made per 10CFR50.72(a)(1)(ii) which requires reporting events that occurred within three years of the date of discovery. Based on operating experience, Engineering personnel reviewed past maintenance activities involving the Technical Support Center (TSC) ventilation system (VH system) and identified 11 occasions between September 2009 and October 2012 (3 years) where the VH system functions could not have been restored within the required facility activation time. The specific instances have been documented in our corrective action program. If an emergency had been declared during these periods and TSC ERO activation was required, the TSC would have been staffed and activated unless the TSC became uninhabitable due to ambient temperatures, radiological or other conditions. If relocation of the TSC staff was necessary, the Station Emergency Coordinator would relocate the staff to an alternate TSC location. Practices and processes have been revised to improve control of TSC maintenance activities and to improve facility availability going forward. In addition, site reporting guidance has been revised to assure timely reporting of these types of events if required. This event is reportable per 10CFR50.72(b)(3)(xiii) as described in NUREG-1022, Rev. 2, since the maintenance activities affected an emergency response facility. The licensee will be notifying the NRC Resident Inspector and state and local authorities in North Carolina and South Carolina. |
| ENS 48294 | 10 September 2012 21:30:00 | On 9-11-12 the Technical Support System (TSC) ventilation will be removed from service for a planned maintenance activity. The ventilation system will be out of service for approximately 9 hours. During this time the TSC will be unavailable should an event involving a radiological release occur. The Catawba Emergency Plan has provisions to relocate TSC personnel if required to the alternate TSC location. The licensee will inform State and local agencies as a courtesy and the NRC Resident Inspector. |
| ENS 47795 | 2 April 2012 11:45:00 | At 0624 EDT on 04/02/2012 the control room was notified by a plant operator that there was a fire in the plant vital battery room area on Unit 2. The fire was located in the lower compartment of inverter 2KUI. This equipment supplies power to 120V AC non-safety related components. The fire brigade captain was dispatched along with the site fire brigade. When the fire brigade captain arrived the operator was staged near the inverter with a CO2 (carbon dioxide) fire extinguisher. The fire brigade captain instructed the NLO (non-licensed operator) to extinguish the fire with the extinguisher. The fire was immediately extinguished once the CO2 was applied from the extinguisher. At 0633 EDT the fire brigade captain reported to the control room that the fire was extinguished. Upon further investigation it appears that transformer in the lower compartment of the inverter had caught fire. The fire was confined to the lower compartment of the inverter and did not affect any other components in the area. Due to the loss of the inverter the loads automatically swapped to the alternate AC source as designed and no indications or equipment were lost due to the loss of the inverter. At the time of this event Unit 1 was at 100% power and Unit 2 was shutdown in Mode 6 with reactor coolant system drained to 8% level with 2B Residual Heat Removal pump supplying core cooling. There was no impact to either unit as a result of this event. All equipment required to maintain core cooling, AC and DC power, and reactor coolant inventory on Unit 2 was maintained during this event. The licensee notified the NRC Resident Inspector. |
| ENS 41373 | 4 February 2005 15:12:00 | The following information was obtained from the licensee via fax: At approximately 0730 on 2/4/05, a radiography safety officer notified the South Carolina Department of Health and Environmental Control (SC DHEC) of a violation of a radiography boundary. The violation occurred sometime between the hours of 2230 on 2/3/05 and 0030 on 2/4/05. At the time of the breech, the radiography source was stored, so no overexposure of personnel is suspected. However, the individual seen by the radiographers has not been identified to ascertain whether or not they were wearing dosimetry while within the boundary. This requires notification to the offsite agency SC DHEC since it is unknown whether or not they were monitored. The radiation safety officer was unaware and his administrative procedure did not inform him of the need for a 10 CFR 50.72 (b) 2 notification. Thus, licensed personnel did not discover that the notification had been made until 1300 on 2/4/05. At this time, licensed personnel began gathering information on the nature of the call to determine reportability. The site has assembled an event investigation team in response to the radiography boundary violation." The NRC Resident Inspector was notified as well as the South Carolina Department of Health and Environmental Control. State and local authorities will be notified of this event. The licensee will notify the NRC of any further information obtained from the investigation. |