ENS 46473

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v t e ENS Event
04:04 Dec 10, 2010
Title	Offsite Notification - Agencies Notified of Onsite Tritium Leak
Event Description	On December 9, 2010, elevated levels of tritium were identified in water samples taken from in-leakage into the below ground elevation of the diesel generator building (i.e., through underground conduit penetrations). The tritium levels were determined to be in excess of the Nuclear Energy Institute (NEI) voluntary reporting criteria (i.e., 30,000 pCi/L for onsite groundwater, as specified in the Offsite Dose Calculation Manual). Further investigation determined that the likely source of the tritiated water is buried piping located west of the diesel generator building. The area of the leak is inside the plant protected area, well inside the site's property boundary. There is no indication that tritium has migrated into drinking water sources or has migrated off plant property. The leakage has not impacted plant reliability or the operability of any safety-related equipment. Corrective actions taken were to capture the in-leakage of water into the diesel generator building and route it through our normal permitted discharge paths. Additional water samples will continue to be obtained from site monitoring wells until the source of the leak is isolated. Efforts to identify and isolate the source of the leakage, and plans for excavation of the suspected area, are in-progress. The Brunswick plant has had an extensive groundwater protection monitoring program in place since 2007. This environmental sampling program consists of more than 100 monitoring wells which are routinely sampled. The following agencies will be updated on the status of the onsite tritium samples: City of Southport, Brunswick County, State Officials, NEI, INPO, and ANI. The Licensee has notified the NRC Resident Inspector. * * UPDATE ON 6/12/10 AT 1610 EST FROM GRZECK TO HUFFMAN * * * On December 10, 2010, at 2124 hours0.0246 days <br />0.59 hours <br />0.00351 weeks <br />8.08182e-4 months <br /> (EST), the buried piping leak was stopped after isolating the Unit 1 Condensate Make-up line to the Main Condenser (i.e., from the Condensate Storage Tank (CST)). The elevated levels of tritium are confined to the area in close proximity to the identified buried pipe location, west of the diesel generator building, well within the site's property boundary. The perimeter monitoring wells to the plant's protected area and site boundary continue to be analyzed with no increase in tritium levels identified. Preparations for the excavation and repair of the Condensate Make-up line are in-progress. The following agencies will be provided an update of this event: City of Southport, Brunswick County, State Officials, NEI, INPO, and ANI. The initial safety significance of this event is minimal. The Brunswick Steam Electric Plant has not identified any health or safety risk to the public or onsite personnel. There is no impact to plant reliability or safety. The Licensee has notified the NRC Resident Inspector." R2DO (Moorman) notified.

ENS 46473 +/-
Where
Brunswick North Carolina (NRC Region 2)
Reporting

10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
Time - Person (Reporting Time:+11.83 h0.493 days <br />0.0704 weeks <br />0.0162 months <br />)
Opened:	Lee Grzeck 15:54 Dec 10, 2010
NRC Officer:	John Knoke
Last Updated:	Dec 12, 2010
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v • d • e

v t e Emergency Notification System
Brunswick with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
WEEKMONTHYEAR2020-06-02T23:05:00 [Table view]
[ENS list for Brunswick]

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