ENS 48426
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ENS Event | |
|---|---|
16:00 Oct 20, 2012 | |
| Title | Offsite Notification Due to a Potential Inadvertent Release of Tritium |
| Event Description | The notification is being made pursuant to 10 CFR 50.72(b )(2)(xi) due to the fact that Exelon Nuclear has informed the Illinois Emergency Management Agency (lEMA) and the Illinois Environmental Protection Agency (IEPA) of the discovery of a hole in the 'A' Waste Sample Tank resulting in a potential inadvertent release of tritium at Dresden Station. Any release is currently contained within the plant's restricted area. The notifications to lEMA and IEPA were made at 1340 hours0.0155 days <br />0.372 hours <br />0.00222 weeks <br />5.0987e-4 months <br /> CDT on October 20, 2012.
The tank was out of service and had been emptied for internal inspection. Therefore at the time of discovery, there was no active leak. The IEPA/lEMA regulations require notification when newly occurring, event-related unpermitted releases of radionuclides are identified. A release has not been confirmed but is suspected. A review of the historical groundwater monitoring well data trends and trending analysis from wells in proximity to the tank indicates no impact on groundwater. Further investigation of the groundwater in the area of the tank is ongoing to determine if an actual release has occurred. The potential leak was not released to an unrestricted area; therefore there is no anticipated adverse impact to the health and safety of the public. Since there was no release to an unrestricted area, 10 CFR Part 20 limits were not impacted. The licensee has notified the NRC Resident Inspector. The Waste Sample Tank normally contains processed rad waste water. The hole was found at the bottom of the tank. |
| Where | |
|---|---|
Dresden  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+-0.85 h-0.0354 days <br />-0.00506 weeks <br />-0.00116 months <br />) | |
| Opened: | Owen Shoger 15:09 Oct 20, 2012 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Oct 20, 2012 |
| 48426 - NRC Website | |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 557212022-02-01T16:25:0001 February 2022 16:25:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertent Siren Actuations ENS 553962021-08-03T20:39:0003 August 2021 20:39:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Inadvertent Siren Actuation ENS 543582019-10-29T14:19:00029 October 2019 14:19:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertent Actuation of Sirens ENS 531982018-02-07T16:40:0007 February 2018 16:40:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Emergency Notification Sirens Inadvertently Actuated ENS 519132016-05-08T04:50:0008 May 2016 04:50:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Reporting That Site Was Notified of Siren Sounding ENS 515092015-10-30T19:29:00030 October 2015 19:29:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Lost of Lift Station Power ENS 501802014-06-08T21:15:0008 June 2014 21:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Tritium Discovered in Onsite Well ENS 484262012-10-20T16:00:00020 October 2012 16:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to a Potential Inadvertent Release of Tritium ENS 483612012-10-01T00:30:0001 October 2012 00:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Fire in the Maintenance Building ENS 470922011-07-24T18:05:00024 July 2011 18:05:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Extended Emergency Siren Activation During Testing ENS 469432011-06-09T19:22:0009 June 2011 19:22:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inadvertent Siren Activation Due to Lightning Strike ENS 466362011-02-22T17:20:00022 February 2011 17:20:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Noncompliant Partial Lake Bypass Operation ENS 451162009-06-06T20:22:0006 June 2009 20:22:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Made Due to Elevated Levels of Tritium ENS 445272008-09-29T15:09:00029 September 2008 15:09:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Discharge of Oil Into Navigable Waters ENS 408812004-07-19T23:04:00019 July 2004 23:04:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Recovery of Drowning Victim on Owner Controlled Property 2022-02-01T16:25:00 | |
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