ENS 46377
ENS Event | |
---|---|
18:00 Oct 29, 2010 | |
Title | Offsite Notification Due to Increase in Tritium Levels in a Ground Water Sample |
Event Description | This report is being made pursuant to 10 CFR 50.72(b)(2)(xi) for notification to other government agencies.
Dominion North Anna Power Station intends to voluntarily notify state and local agencies regarding an increase in tritium levels in one (1) onsite ground water monitoring sample point. This increase in tritium levels has not exceeded any NRC regulatory dose limits nor has it exceeded the voluntary reporting limits (i.e., 20,000 picoCuries per liter) specified in NEI 07-07 Industry Ground Water Protection - Final Guidance Document. Two (2) adjacent onsite ground water monitoring sample points have not shown a similar increase. None of the eight (8) ground water monitoring sample points surrounding the station have shown any detectable levels of tritium. All indications show that the tritium in the one (1) onsite ground water monitoring sample point has not migrated to the lake or any drinking water sources. The station continues to monitor, sample and investigate the source of the tritium anomaly. This condition does not present a health hazard to station employees or the general public. Normal tritium levels at the particular sample point are 3-4000 picoCuries per liter. One sample read 16,500 picoCuries per liter. Samples afterwards have return to normal readings. The NRC Resident Inspector has been notified. |
Where | |
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North Anna Virginia (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
Time - Person (Reporting Time:+-3.82 h-0.159 days <br />-0.0227 weeks <br />-0.00523 months <br />) | |
Opened: | Page Kemp 14:11 Oct 29, 2010 |
NRC Officer: | Dong Park |
Last Updated: | Oct 29, 2010 |
46377 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (7 %) |
After | Power Operation (7 %) |
Unit 2 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
WEEKMONTHYEARENS 567432023-09-18T18:20:00018 September 2023 18:20:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 566182023-07-11T19:30:00011 July 2023 19:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 563742023-02-20T21:18:00020 February 2023 21:18:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to State Agency ENS 560732022-08-27T14:15:00027 August 2022 14:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Turbine Trip Due to Main Transformer Fire ENS 555702021-11-10T20:15:00010 November 2021 20:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Pcb Oil Spill ENS 524382016-12-15T16:30:00015 December 2016 16:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Made for Potential Fuel Oil Leakage ENS 508842015-03-13T13:28:00013 March 2015 13:28:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to Osha Due to Onsite Plant Employee Passing Away ENS 490722013-05-27T19:45:00027 May 2013 19:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Drowning at Lake Anna ENS 476822012-02-21T18:45:00021 February 2012 18:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Tritium Identified Onsite Above the Voluntary Reporting Threshold ENS 476652012-02-15T17:44:00015 February 2012 17:44:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Sewage System Release ENS 473452011-10-14T18:40:00014 October 2011 18:40:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Bearing Cooling Water Discharge Into Lake ENS 471982011-08-25T20:10:00025 August 2011 20:10:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Notification to Offsite Agency Regarding an Onsite Oil Spill ENS 463772010-10-29T18:00:00029 October 2010 18:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Increase in Tritium Levels in a Ground Water Sample ENS 456232010-01-11T20:10:00011 January 2010 20:10:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Water Seepage on an Onsite Structure ENS 455582009-12-10T15:35:00010 December 2009 15:35:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Bearing Cooling Water Discharged Into Lake ENS 449722009-04-06T16:30:0006 April 2009 16:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Truck Engine Fire with Contaminated Material in Trailer ENS 413222005-01-10T18:45:00010 January 2005 18:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to Federal Energy Regulatory Commission ENS 406372004-04-03T18:14:0003 April 2004 18:14:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Notification to Virginia Deq Concerning a Chemical Spill 2023-09-18T18:20:00 | |