ENS 57329
ENS Event | |
|---|---|
15:15 Sep 18, 2024 | |
| Title | Offsite Notification for Oil Release |
| Event Description | The following information was provided by the licensee via email:
On September 18, 2024, Columbia Generating Station determined that lubricating oil was likely released into the plant service water system due to a failed heat exchanger on the reactor feed turbine alpha. Isolation of the heat exchanger from the plant service water system is in progress. The plant service water system returns water to a water basin that contains, at a minimum, 300,000 gallons of water. The water basin is connected to the Columbia River via a blowdown line. The blowdown line was secured at 0739 PDT on 9/18/2024. A visual inspection of the basin did not identify any oil sheen or film, but a sample downstream of the affected heat exchanger revealed an oily sheen in the sample bottle. It does not appear the oil released poses a threat to human health or the environment. However, there could have been a discharge of an unknown quantity of oil into the Columbia River. This matter is immediately reportable under Revised Code of Washington 90.56.280 to the U.S. Coast Guard National Response Center, Washington State Department of Ecology, and to the Energy Facility Site Evaluation Council per National Pollutant Discharge Elimination System (NPDES) permit section S3.F.2.b.i. This condition is being reported pursuant to 10 CFR 50.72(b)(2)(xi) for notification of other government agencies concerning an event related to the health and safety of the public or protection of the environment. Notifications to off-site agencies were performed at 0850 PDT on 9/18/2024. The NRC Resident Inspector has been notified. United States Coast Guard National Response Center Incident Report #141183 Washington State Department of Ecology #733853
The following information was provided by the licensee via email: On September 18, 2024, Columbia Generating Station notified the NRC (event notification 57329) under 10 CFR 50.72(b)(2)(xi) of an offsite notification for potential oil release to the plant service water system and potentially the Columbia River. Further troubleshooting efforts refuted the possibility of leakage from the heat exchanger to the plant service water system. Engineering determined the most likely path of oil leakage was through a seal in the reactor feed turbine 'A' pump. This leakage would exit with seal water leak-off into the marine oil separator into collection barrels which are collected and processed. Since troubleshooting efforts determined oil leakage was not from the heat exchanger to the plant service water system, the offsite notification retractions were completed as of October 10, 2024, and therefore event notification 57329 is being retracted. The NRC Resident Inspector was notified. Notified R4DO (Gaddy). |
| Where | |
|---|---|
Columbia Generating Station  Washington (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+-1.73 h-0.0721 days <br />-0.0103 weeks <br />-0.00237 months <br />) | |
| Opened: | Matthew Pace 13:31 Sep 18, 2024 |
| NRC Officer: | Adam Koziol |
| Last Updated: | Oct 10, 2024 |
| 57329 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 573292024-09-18T15:15:00018 September 2024 15:15:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification for Oil Release ENS 573142024-09-10T23:30:00010 September 2024 23:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 570132024-03-07T00:35:0007 March 2024 00:35:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 565722023-06-14T01:42:00014 June 2023 01:42:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Oil Release ENS 554252021-08-22T15:30:00022 August 2021 15:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Potential Oil Discharge ENS 515622015-11-24T21:30:00024 November 2015 21:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Fuel Defects ENS 490192013-05-10T01:00:00010 May 2013 01:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Inlet/Outlet Turbidity Flocculator Not Recording Data ENS 470022011-06-30T21:25:00030 June 2011 21:25:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Inadvertent Siren Actuation ENS 459032010-05-05T22:10:0005 May 2010 22:10:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Injured Individual Hospitalized ENS 437712007-11-05T07:00:0005 November 2007 07:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Transportation of Radioactive Material Without Proper Labeling ENS 435742007-08-17T15:00:00017 August 2007 15:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to the United States Department of Transportation ENS 417392005-06-01T15:08:0001 June 2005 15:08:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(3)(xii), Transport of a Contaminated Person Offsite Contaminated Injured Person Taken to Offsite Hospital ENS 406612004-04-09T19:30:0009 April 2004 19:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Chemical Spill ENS 405802004-03-10T16:35:00010 March 2004 16:35:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to a Fatality Onsite 2024-09-18T15:15:00 | |