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| Entered date | Event description | |
|---|---|---|
| ENS 49994 | 3 April 2014 13:54:00 | At approximately 0906 EDT, the Harris Nuclear Plant (HNP) offsite emergency sirens were identified to be nonfunctional. Troubleshooting was initiated and the offsite emergency sirens were restored and verified to be functional at 1127 EDT. This event requires an 8-hour non-emergency notification per 10CFR 50.72(b)(3)(xiii) due to the loss of a significant portion of the offsite notification system. In the event that the sirens would have been needed, the State of North Carolina and all four counties within the 10-mile emergency planning zone would have implemented mobile route alerting, as detailed in the Emergency Plan. The NRC Senior Resident Inspector was informed. There was no impact to public health and safety. |
| ENS 49394 | 30 September 2013 12:52:00 | Harris Nuclear Plant is following the guidance in NEI 07-07 and has initiated this Event Notification as a result of our voluntary communication to state agencies in accordance with the Groundwater Protection Initiative. On Sept. 27, 2013, at 9:15 pm EDT, plant personnel identified a leak from a temporary transfer pipe on plant property, well within the site boundary. The pipe carries secondary plant and water treatment building waste water for chemical processing. The leak is conservatively estimated to be 240 gallons of water containing a low level of tritium (3,954 picocuries per liter) leaked into the surrounding soil. The EPA drinking water standard is 20,000 picocuries per liter. The leak was stopped and the piping replaced. The health and safety of the public and employees on site are not affected by this event based on the leak location and low tritium level. The NRC Resident Inspector has been notified. |
| ENS 48684 | 20 January 2013 20:50:00 | At 1641 on January 20, 2013, the Technical Support Center (TSC) became non-functional when the ventilation system was secured and disabled by a fire alarm. Investigation of the alarm condition determined the fire alarm was not valid and would not reset. At 1830, Technical Support Center ventilation was restored by disabling the deficient fire alarm by using guidance in alarm response procedure APP-FP-KBLDG. The Technical Support Center was restored to functional status at 1830 on January 20, 2013. This event is reportable per 10 CFR 50.72(b)(3)(xiii) as described in NUREG-1022, Rev. 2 since this condition affected an emergency response facility for greater than facility activation time (one hour). The NRC Resident Inspector has been informed |
| ENS 48670 | 14 January 2013 08:44:00 | This is a non-emergency notification. At approximately 08:40 EST on January 14, 2013, radiation monitor RM-01TV-3547-1, Waste Processing Building Vent Stack 5A Wide Range Gas Monitor (WRGM) will be declared inoperable for pre-planned maintenance. MST-I0377, WPB Stack 5A Accident Monitor Channel Calibration will be performed. The maintenance activity is expected to complete January 15, 2013. This radiation monitor is necessary for accident assessment and is credited for Emergency Action Level (EAL) classification in the Harris Nuclear Plant Emergency Plan. Inability to classify an EAL due to an out of service monitor is considered a loss of accident assessment capability and is reportable per 10 CFR 50.72(b)(3)(xiii) as described in NUREG-1022, Rev. 2. This condition does not affect the health of safety of the public or the operation of the facility. The NRC Resident Inspectors have been notified. |
| ENS 48573 | 10 December 2012 07:17:00 | This is a non-emergency notification. At approximately 07:30 EST on December 10, 2012, radiation monitor RM-01TV-3536-1, Turbine Building Vent Stack Wide Range Gas Monitor (WRGM) will be declared inoperable for pre-planned corrective maintenance on the FT-01TV-3536-1, Turbine Bldg Vent Stack flow rate monitor. The corrective maintenance is expected to last approximately 5 to 6 hours. This radiation monitor is necessary for accident assessment and is credited for Emergency Action Level (EAL) classification in the Harris Nuclear Plant Emergency Plan. Inability to classify an EAL due to an out of service monitor is considered a loss of accident assessment capability and is reportable per 10 CFR 50.72(b)(3)(xiii) as described in NUREG-1022, Rev. 2. This condition does not affect the health or safety of the public or the operation of the facility. The NRC Resident Inspectors have been notified. |
| ENS 48538 | 27 November 2012 16:29:00 | This is a non-emergency notification. At 0900 EST on November 27, 2012, it was discovered that radiation monitor RM-1WV-3546-1, Waste Processing Building Wide Range Gas Monitor was inoperable due to a database error. The database error appears to have occurred at approximately 1724 EST on November 26, 2012. The database error was corrected and the monitor returned to service at 0958 EST on November 27, 2012. This monitor is the only monitor credited in the EALs for monitoring a gaseous release from the Waste Processing Building. This radiation monitor is necessary for accident assessment and is credited for Emergency Action Level (EAL) classification in the Harris Nuclear Plant Emergency Plan. Inability to classify an EAL due to an out of service monitor is considered a loss of accident assessment capability and is reportable per 10 CFR 50.72(b)(3)(xiii) as described in NUREG-1022, Rev. 2. This condition does not affect the health and safety of the public or the operation of the facility because no events occurred during the time the radiation monitor was out of service. The NRC Resident Inspector has been notified. See EN #48536 for similar report. |