ENS 43703

v t e ENS Event
13:15 Oct 9, 2007
Title	Elevated Onsite Tritium Levels
Event Description	Thirty new ground water monitoring wells were recently installed at Catawba Nuclear Station in support of the Nuclear Energy Institute (NEI) ground water initiative. The initial sampling of one of these wells displayed a level of tritium that triggered the communication protocol of the NEI initiative on ground water protection. The tritium concentration for this well was 42,335 picocuries per liter (pCi/l). The threshold for initiating the communication protocol is 20,000 pCi/l. This well is inside the owner controlled area. Adjacent wells surrounding this well do not have similar tritium levels. The station is continuing to investigate the source of tritium identified in this well. Samples from the remaining wells are far below the communication protocol threshold. There is no public risk associated with this well sample. There is no indication that tritium has migrated off the Catawba site in the ground water at the communication threshold. Also this well is not a drinking water source and therefore, there is no potential dose to plant workers or the public. The licensee notified the NRC Resident Inspector.

ENS 43703 +/-
Where
Catawba South Carolina (NRC Region 2)
Reporting

10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
Time - Person (Reporting Time:+-3.57 h-0.149 days <br />-0.0212 weeks <br />-0.00489 months <br />)
Opened:	Tom Poetzsch 09:41 Oct 9, 2007
NRC Officer:	Jason Kozal
Last Updated:	Oct 9, 2007
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v • d • e

v t e Emergency Notification System
Catawba with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
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