ENS 40718
ENS Event | |
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07:06 Apr 1, 2004 | |
Title | Invalid Automatic Start of Emergency Diesel Generator During Surveillance Test |
Event Description | The purpose of this report is provide a telephone notification under 10 CFR 50.73 (a)(2)(iv)(A) in lieu of submitting a written LER for an invalid actuation from other than the Reactor Protection System (RPS) when the reactor is critical.
On April 1, 2004 at 0306, during a refueling outage the Division I Diesel Generator auto-started during the performance of a bus under-voltage surveillance test. The diesel generator successfully started with the Divisional Switchgear remaining energized from off-site power. The diesel was secured following verification of the start to be a result of an invalid signal. Prior to the engine start, the diesel was removed from service to support planned maintenance activities. In conjunction with these activities surveillance testing was being performed which required the diesel generator to be unavailable. When the maintenance activities were completed the diesel was restored to available. The relay and control testing was recommenced without realizing the impact that restoring the tag out would have on the testing. The diesel started successfully, however it did not energize the switchgear, as the switchgear remained energized from its normal power supply. The licensee notified the NRC Resident Inspector. |
Where | |
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Nine Mile Point ![]() New York (NRC Region 1) | |
Reporting | |
10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
Time - Person (Reporting Time:+707.23 h29.468 days <br />4.21 weeks <br />0.969 months <br />) | |
Opened: | Stephen Fregeau 17:20 Apr 30, 2004 |
NRC Officer: | Mike Ripley |
Last Updated: | Apr 30, 2004 |
40718 - NRC Website
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WEEKMONTHYEARENS 535842018-03-19T04:00:00019 March 2018 04:00:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation ENS 527472017-03-20T06:16:00020 March 2017 06:16:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephone Notification for an Invalid High Pressure Coolant Injection System Actuation ENS 509092015-01-21T15:00:00021 January 2015 15:00:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Notification - Invalid Containment Isolation Signal ENS 490842013-04-02T13:46:0002 April 2013 13:46:00 10 CFR 50.73(a)(1), Submit an LER 6O-Day Optional Telephone Notification for an Invalid Specified System Actuation ENS 485702012-10-12T14:12:00012 October 2012 14:12:00 10 CFR 50.73(a)(1), Submit an LER Temperature Switch Failure Causes Division I Isolation Signal ENS 481132012-05-24T14:20:00024 May 2012 14:20:00 10 CFR 50.73(a)(1), Submit an LER 60 - Day Optional Telephone Notification of an Invalid Division 2 Containment Isolation Signal ENS 475472011-11-08T03:31:0008 November 2011 03:31:00 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation Due to a Possible Faulty Temperature Switch ENS 457792010-03-15T16:43:00015 March 2010 16:43:00 10 CFR 50.73(a)(1), Submit an LER Inadvertent Start of Emergency Diesel Generator ENS 439232008-01-14T18:41:00014 January 2008 18:41:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Group 5 and Group 10 Primary Containment Valves During Surveillance Testing ENS 438552007-11-08T15:21:0008 November 2007 15:21:00 10 CFR 50.73(a)(1), Submit an LER Invalid Primary Containment Isolation System (Pcis) Actuation ENS 407182004-04-01T07:06:0001 April 2004 07:06:00 10 CFR 50.73(a)(1), Submit an LER Invalid Automatic Start of Emergency Diesel Generator During Surveillance Test 2018-03-19T04:00:00 | |