ENS 52426
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ENS Event | |
|---|---|
19:10 Dec 13, 2016 | |
| Title | Offsite Notification - Water Containing Tritium Spilled Into Storm Drain |
| Event Description | On 12/13/16 at 1410 [EST], the following voluntary communication was made to the State of Tennessee in accordance with Tennessee Valley Authority's (TVA) guidance for communicating inadvertent radiological spills/leaks that are below regulatory reporting requirements to outside agencies and in alignment with NEI 07-07, 'Industry Ground Water Protection Initiative'.
On 12/12/16, Sequoyah Nuclear Plant determined that a spill of greater than 100 gallons (approximately 3000 gallons) of condensate storage tank water with tritium levels of 1560 pCi/L [picocuries per liter] was spilled to a yard drain. The spill occurred on 12/5/16, during the filling of the Unit 1 #4 steam generator when a hose connection on a temporary fill skid failed. No elevated tritium levels have been detected at the Sequoyah Yard Drainage Pond before or after the event. This is reported in accordance with 10CFR50.72(b)(2)(xi), the required reportable threshold for tritium is 20,000 pCi/L. The licensee will notify the NRC Resident Inspector. |
| Where | |
|---|---|
Sequoyah  Tennessee (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+-4.5 h-0.188 days <br />-0.0268 weeks <br />-0.00616 months <br />) | |
| Opened: | Theodore Doukas 14:40 Dec 13, 2016 |
| NRC Officer: | John Shoemaker |
| Last Updated: | Dec 13, 2016 |
| 52426 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 565922023-06-27T12:31:00027 June 2023 12:31:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 549182020-09-28T15:43:00028 September 2020 15:43:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification - Oil Spill ENS 537542018-11-26T05:00:00026 November 2018 05:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared for Excessive Smoke in Containment ENS 536802018-10-21T04:00:00021 October 2018 04:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Death of Employee on Site ENS 532702018-03-19T04:30:00019 March 2018 04:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Two Contractors Injured by Arc Flash ENS 524262016-12-13T19:10:00013 December 2016 19:10:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Water Containing Tritium Spilled Into Storm Drain ENS 507572015-01-23T16:50:00023 January 2015 16:50:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notifications Due to Oil Sheen on Intake Bay ENS 505812014-10-30T16:20:00030 October 2014 16:20:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Regarding Boone Dam Stability Issues ENS 497382014-01-17T19:00:00017 January 2014 19:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Fuel Oil Found During Core Drilling ENS 480742012-07-06T14:12:0006 July 2012 14:12:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Loss of 21 Offsite Sirens Due to Inclement Weather ENS 479592012-05-24T19:41:00024 May 2012 19:41:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Oil Sheen on the River ENS 479222012-05-14T14:24:00014 May 2012 14:24:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Oil Sheen Observed on Diffuser Pond ENS 475342011-12-19T21:44:00019 December 2011 21:44:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Tritium Levels Exceeding Threshold for Drinking Water ENS 472562011-09-12T17:05:00012 September 2011 17:05:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to the Tennessee Department of Environment and Conservation (Tdec) ENS 470452011-07-13T04:23:00013 July 2011 04:23:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Overflow of Condenser Circulating Water ENS 467902011-04-27T14:30:00027 April 2011 14:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Loss of Emergency Sirens Due to Loss of Electric Power ENS 461952010-08-21T19:09:00021 August 2010 19:09:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Notification of State Agencies Due Leak of a Water Treatment Chemical ENS 456682010-01-31T15:42:00031 January 2010 15:42:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Tema Notified of a Loss of Emergency Sirens ENS 453952009-09-30T19:21:00030 September 2009 19:21:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to Various Government Agencies ENS 453532009-09-16T16:20:00016 September 2009 16:20:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Made After Discovery of an Oil Sheen ENS 451722009-06-29T15:34:00029 June 2009 15:34:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Possible Release of Fuel Oil to the Environment ENS 450642009-05-13T19:05:00013 May 2009 19:05:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Track Hoe Slid Into Intake Forebay ENS 406552004-04-08T12:45:0008 April 2004 12:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Off Site Notification 2023-06-27T12:31:00 [Table view] | |
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