ENS 56685
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ENS Event | |
|---|---|
20:00 Aug 20, 2023 | |
| Title | Technical Specification Required Shutdown |
| Event Description | The following information was provided by the licensee via email:
On 8/20/2023 at 1600 EDT, during plant walkdowns in the drywell while in mode 3 to identify a cause of increasing unidentified leakage rate, reactor coolant system pressure boundary leakage (approximately 2 gpm) was identified on the reactor recirculation sample line between the reactor recirculation sample line inboard isolation valve (B3100F019) and where the sample line taps off the B reactor recirculation jet pump riser. This requires entry into technical specification 3.4.4 condition C, identification of pressure boundary leakage with a required action to be in mode 3 in 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and mode 4 in 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. At 1630 EDT, a technical specification required shutdown to mode 4, cold shutdown, was initiated. A press release by DTE is anticipated. This event is being reported as a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(i), a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(xi), and an eight-hour, non-emergency notification 10 CFR 50.72(b)(3)(ii)(A) for the degraded condition of the pressure boundary. Investigation into the cause of the reactor coolant system pressure boundary leakage is still ongoing. There was no impact on the health and safety of the public or plant personnel. The NRC resident inspector has been notified. |
| Where | |
|---|---|
Fermi  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+-1.5 h-0.0625 days <br />-0.00893 weeks <br />-0.00205 months <br />) | |
| Opened: | Richard Beck 18:30 Aug 20, 2023 |
| NRC Officer: | Dan Livermore |
| Last Updated: | Aug 20, 2023 |
| 56685 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Shutdown (0 %) |
| After | Hot Shutdown (0 %) |
Fermi with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
WEEKMONTHYEARENS 566852023-08-20T20:00:00020 August 2023 20:00:00
[Table view]10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Technical Specification Required Shutdown ENS 553572021-07-15T21:40:00015 July 2021 21:40:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Exceeding NPDES Limit ENS 551602021-03-30T14:58:00030 March 2021 14:58:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Sewage Spill ENS 541682019-07-16T18:45:00016 July 2019 18:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Sewage Spill on Site ENS 541632019-07-15T17:35:00015 July 2019 17:35:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notiification Due to Oil Leak ENS 540922019-05-27T13:40:00027 May 2019 13:40:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Onsite Spill of Chemical Toilet ENS 533852018-05-04T18:12:0004 May 2018 18:12:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 531782018-01-22T16:15:00022 January 2018 16:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Oil Spill ENS 528372017-07-01T18:20:0001 July 2017 18:20:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Sodium Hypochlorite in Excess of State Permit Limits ENS 524812017-01-11T01:40:00011 January 2017 01:40:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification ENS 524302016-12-14T14:45:00014 December 2016 14:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Made for a Sewage Leak ENS 523642016-11-14T16:06:00014 November 2016 16:06:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to On-Site Sewage Spill ENS 521492016-08-02T21:10:0002 August 2016 21:10:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Onsite Sewage Spill ENS 520852016-07-14T13:15:00014 July 2016 13:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification of Government Agencies of an Oil Spill to the Environment ENS 515352015-11-12T20:00:00012 November 2015 20:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Portable Chemical Toilet Spill to the Environment ENS 511862015-06-27T15:00:00027 June 2015 15:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Made After Portable Toilet Tipped Over ENS 510802015-05-19T15:30:00019 May 2015 15:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to On-Site Sanitary Sewer Leak ENS 508742015-03-09T19:21:0009 March 2015 19:21:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech Spec Required Shutdown Due to Swing Bus Automatic Throwover Failure ENS 502642014-07-08T15:48:0008 July 2014 15:48:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Diesel Fuel Oil Leak ENS 494512013-10-18T19:05:00018 October 2013 19:05:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Onsite Oil Spill ENS 484712012-11-01T16:15:0001 November 2012 16:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification - Oil Spill Into Navigable Waters ENS 480662012-07-03T13:40:0003 July 2012 13:40:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to a Fatality ENS 473832011-10-27T21:15:00027 October 2011 21:15:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Accidental Discharge of Firearm ENS 469602011-06-15T12:35:00015 June 2011 12:35:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Body Discovered in the Owner Controlled Area ENS 465132010-12-27T20:37:00027 December 2010 20:37:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notifications - Exceeded Discharge Permit ENS 464332010-11-23T16:45:00023 November 2010 16:45:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Other Government Agency Notification Due to Sewage Leak ENS 446102008-10-29T19:00:00029 October 2008 19:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Hydraulic Fluid Spill ENS 441902008-05-06T04:00:0006 May 2008 04:00:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification to Law Enforcement Due to Discovery of Deceased Individual on Shoreline ENS 441812008-04-30T19:55:00030 April 2008 19:55:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Calcium Chloride Spilled on Site ENS 436992007-10-07T05:14:0007 October 2007 05:14:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Primary Containment Leak Rate Exceeded ENS 424652006-04-01T05:39:0001 April 2006 05:39:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Excessive Check Valve Leakage at a Containment Penetration ENS 409322004-08-09T02:00:0009 August 2004 02:00:00 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Tech Spec Shut Down Due to Emergency Diesel Generator Failure ENS 403542003-11-25T22:30:00025 November 2003 22:30:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Due to Ethylene Glycol Leak ENS 402702003-10-22T20:23:00022 October 2003 20:23:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release Offsite Notification Concerning Onsite Fatality ENS 402102003-10-01T00:50:0001 October 2003 00:50:00 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(2)(i), Tech Spec Required Shutdown Plant Shutdown Required by Technical Specifications Due to Inoperable Control Center Hvac 2023-08-20T20:00:00 | |
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