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| Entered date | Event description | |
|---|---|---|
| ENS 44951 | 1 April 2009 14:49:00 | On April 1, 2009, the results of an ongoing hydrology study being conducted by Harris Nuclear Plant as part of the voluntary Industry Groundwater Protection Initiative revealed that a pipe leak in the buried Cooling Tower Blowdown line was releasing water containing tritium into surrounding soil. The maximum tritium activity level discovered was 2,120 pCi/L, well below maximum levels allowed by regulation. While the leak rate has not been determined, it appears to be small. The Cooling Tower Blowdown line is used for liquid effluent dilution as part of permitted, routine releases. The permitted liquid effluent release point is the discharge from the Cooling Tower Blowdown line into Harris Lake. This line is leaking upstream of the permitted release point. All leaking water is contained within the site boundary, and based on studies performed by an independent hydrologist, offsite migration is not anticipated. Immediate corrective actions include voluntary notifications, installation of additional monitoring wells at various locations to determine groundwater flow and to check for the presence of tritium. The water containing low levels of tritium is in a localized area immediately surrounding the Cooling Tower Blowdown line. The health and safety of the public are not affected by this event, as the activity levels discovered are significantly below maximum levels allowed by regulation. Harris Nuclear Plant is following the guidance contained 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. The licensee informed the State of North Carolina (Division of Radiation Protection and Department of Water Quality) and the NRC Resident Inspector. The licensee will also inform local agencies. |
| ENS 40792 | 4 June 2004 15:15:00 | The South Carolina Department of Health and Environmental Control was notified on Friday, June 04, 2004 of a possible medical rnisadministration notification which was reported by the Radiation Safety Officer for the Cancer Center of the Carolinas. A Cs-137 brachytherapy radiation dose was administered to a patient where the calculated administered dose differed from the prescribed dose by more than 20%. This apparently occurred when the radiation source was not fully extended to the end of the application catheter. The event is under investigation and updates will be made through the national NMED system as they become available. |