ENS 54931
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ENS Event | ||
|---|---|---|
06:28 Aug 6, 2020 | ||
| Title | 60-Day Optional Telephonic Notification of an Invalid Specified System Actuation | |
| Event Description | This 60-day telephone notification is being made under reporting requirements specified by 10 CFR 50.73(a)(2)(iv)(A) and 10 CFR 50.73(a)(1) to describe an invalid actuation of an emergency service water system component that does not normally run and which provides an ultimate heat sink.
On August 6, 2020, at approximately 0128 CDT, the A3 Emergency Equipment Cooling Water (EECW) pump received an auto-start signal while performing Post-Maintenance Testing (PMT) on the 3C Core Spray pump. Normally, the involved EECW pump would be started prior to testing to prevent an auto-start; however, in this case the pump was not running prior to the test. When the 3C Core Spray pump breaker was closed while in the test position, an unanticipated actuation of the A3 EECW pump occurred. Work was stopped and the workers reported to the Control Room to evaluate the condition. Based on a review of this event, individuals involved were coached on understanding system response prior to performing work. The A3 EECW pump responded in accordance with the plant design. No other plant equipment was affected during this event. There were no safety consequences or impacts on the health and safety of the public. The event was entered into TVA's corrective action program for evaluation and resolution. Reference corrective action document CR 1628479. The NRC Resident Inspector has been notified of this event. | |
| Where | |
|---|---|
Browns Ferry  Alabama (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1447.38 h60.308 days <br />8.615 weeks <br />1.983 months <br />) | |
| Opened: | Casey Cartwright 13:51 Oct 5, 2020 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Oct 5, 2020 |
| 54931 - NRC Website
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Notification of Invalid Specified System Actuation ENS 480062012-04-11T20:15:00011 April 2012 20:15:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation Resulting from Post Maintenance Testing ENS 474502011-09-19T16:00:00019 September 2011 16:00:00 10 CFR 50.73(a)(1), Submit an LER Invalid Group 6 Isolation Signal ENS 470032011-05-01T07:44:0001 May 2011 07:44:00 10 CFR 50.73(a)(1), Submit an LER Invalid Rps (Scram) Actuation ENS 468802011-03-30T19:43:00030 March 2011 19:43:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Telephonic Notification of Invalid Rps Signal Due to Loss of Variable Leg of Level Transmitter ENS 468812011-03-27T01:05:00027 March 2011 01:05:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Telephonic Notification of Invalid Primary Containment Isolation Signal Due to Maintenance ENS 466562011-01-03T21:15:0003 January 2011 21:15:00 10 CFR 50.73(a)(1), Submit an LER 60 Day Telephone Notificaton Concerning Invalid Containment Isolation System Actuations ENS 460662010-07-02T17:32:0002 July 2010 17:32:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System Actuation from a Loss of Power to the Reactor Protection System (Rps) 3A ENS 460542010-04-30T21:48:00030 April 2010 21:48:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System (Pcis) Actuation from a Loss-Of-Power to Reactor Protection System (Rps) 1A ENS 460462010-04-27T22:37:00027 April 2010 22:37:00 10 CFR 50.73(a)(1), Submit an LER Invalid Group 6 Containment Isolation ENS 442942008-04-14T18:08:00014 April 2008 18:08:00 10 CFR 50.73(a)(1), Submit an LER Inadvertant Deenergization of Group Six Logic Circuit ENS 430832006-11-10T06:10:00010 November 2006 06:10:00 10 CFR 50.73(a)(1), Submit an LER Edg Actuation Due to Accidental Switch Mispositioning ENS 428782006-08-20T01:02:00020 August 2006 01:02:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System Actuation ENS 428772006-08-19T00:58:00019 August 2006 00:58:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System (Pcis) Actuation ENS 428672006-08-09T14:51:0009 August 2006 14:51:00 10 CFR 50.73(a)(1), Submit an LER Invalid Eecw Pump Actuation During Testing ENS 428372006-07-18T09:47:00018 July 2006 09:47:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System Actuation Due to Loss of Power to One Reactor Protection System Bus ENS 423892006-01-13T17:57:00013 January 2006 17:57:00 10 CFR 50.73(a)(1), Submit an LER Unplanned, Invalid Actuation of Emergency Diesel Generator ENS 422152005-11-15T14:05:00015 November 2005 14:05:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System (Pcis) Actuation ENS 411812004-09-28T18:02:00028 September 2004 18:02:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System Actuation from Loss-Of-Power to Reactor Protection System (Rps) Bus 2A ENS 411802004-09-25T23:14:00025 September 2004 23:14:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System Actuation from Loss-Of-Power to Reactor Protection System (Rps) Bus 3B 2021-04-01T18:02:00 [Table view] | |
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