ENS 43840
ENS Event | |
|---|---|
07:00 Oct 14, 2007 | |
| Title | Inadvertent Actuation of Emergency Diesel Generator |
| Event Description | This 60-day optional telephone notification as allowed by 10 CFR 50.73(a)(1) is being made in lieu of an LER submittal. This notification is made pursuant to the reporting requirements specified in 10 CFR50.73(a)(2)(iv)(A) for an invalid actuation of one of the systems listed in 10 CFR 50.73(a)(2)(iv)(B).
On October 14, 2007, at approximately 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> EST with the plant in Mode 5, Refueling, while performing ECCS Start and Load Reject surveillance testing on Emergency Diesel Generator (EDG) 14, the EDG unexpectedly auto-started. Investigation revealed that the auto-start was caused by a faulty test switch. The test switch had been tested multiple times prior to performing the surveillance with no abnormalities noted. EDG 14 is one of two EDG's in Division II of the Onsite Emergency Power system. The EDG responded properly to the auto-start signal. The actuation was complete, in that the EDG started and ran unloaded. The surveillance testing was immediately stopped upon receipt of the inadvertent actuation. In accordance with the EDG operating procedure, the EDG was synchronized, loaded for about an hour, shut down and returned to standby status. Since no actual plant condition existed that required the EDG to auto-start, the actuation was invalid. There were no safety consequences or impact on the health and safety of the public. The event was entered in the corrective action program for evaluation and resolution. The NRC Resident Inspector will be notified of this report. |
| Where | |
|---|---|
Fermi  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1425.03 h59.376 days <br />8.482 weeks <br />1.952 months <br />) | |
| Opened: | Rodney Johnson 17:02 Dec 12, 2007 |
| NRC Officer: | Joe O'Hara |
| Last Updated: | Dec 12, 2007 |
| 43840 - NRC Website
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WEEKMONTHYEARENS 528592017-03-24T19:48:00024 March 2017 19:48:00
[Table view]10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuation During Testing ENS 511282015-05-24T23:30:00024 May 2015 23:30:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Actuation of Containment Isolation Valves ENS 501122014-03-19T00:30:00019 March 2014 00:30:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Actuation of Containment Isolation Valves ENS 438502007-10-22T23:30:00022 October 2007 23:30:00 10 CFR 50.73(a)(1), Submit an LER Invalid System Actuation ENS 438402007-10-14T07:00:00014 October 2007 07:00:00 10 CFR 50.73(a)(1), Submit an LER Inadvertent Actuation of Emergency Diesel Generator ENS 424282006-02-10T16:20:00010 February 2006 16:20:00 10 CFR 50.73(a)(1), Submit an LER Invalid Specified System Actuations ENS 408992004-05-30T14:40:00030 May 2004 14:40:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Containment Isolation Valves Due to Partial Loss of 120 Vac Modular Power Unit 2 Loads 2017-03-24T19:48:00 | |