ENS Event | |
|---|---|
18:57 Apr 4, 2004 | |
| Title | 60 -Day Report: Invalid Actuation of the "E" Emergency Diesel Generator |
| Event Description | On 04/04/04 at 14:57 hours, the "E" Emergency Diesel Generator unexpectedly started in the emergency mode of operation during performance of Unit 1 LOCA/LOOP surveillance testing. The diesel generator started in response to a false loss of offsite power signal that occurred after an electrical test jumper was incorrectly installed in panel 1A201. While the procedure directed installation of the jumper across the field side of states links T5-10 and T5-12, the jumper was instead installed across the panel side of the links. When link T5-10 was opened per procedural direction, a false LOOP signal was sent to the "E" diesel generator start circuit. The "E" emergency diesel generator successfully started and properly responded to the complete train actuation signal. The diesel was shutdown following the incident. No other plant equipment was affected by this jumper use error. At the time of this event, Unit 1 was in Mode 5 and Unit 2 was in Mode 1. Both Units continued in Modes 5 and 1, respectively. Surveillance testing was successfully completed on 04/05/04.
The consequences of this event were limited to the unplanned start of the "E" emergency diesel generator. The diesel generator started and functioned in accordance with its design. This event comprises an invalid actuation of an emergency AC electrical power system and is therefore being reported in accordance with 10 CFR 50.73(a)(2)(iv)(A) as a 60- day telephone notification per the provision of 10 CFR 50.73 (a)(1). The NRC Resident Inspector was notified of the 60- day report notification by the licensee. |
| Where | |
|---|---|
Susquehanna  Pennsylvania (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
| Time - Person (Reporting Time:+1125.02 h46.876 days <br />6.697 weeks <br />1.541 months <br />) | |
| Opened: | Don Roland 15:58 May 21, 2004 |
| NRC Officer: | John Mackinnon |
| Last Updated: | May 21, 2004 |
| 40766 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 541032019-04-18T05:10:00018 April 2019 05:10:00
[Table view]10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification Due to Invalid Specified System Actuation ENS 527722017-04-03T01:27:0003 April 2017 01:27:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification of Invalid Specified System Actuation ENS 480922012-05-14T13:28:00014 May 2012 13:28:00 10 CFR 50.73(a)(1), Submit an LER 60-Day Optional Telephonic Notification for an Invalid Emergency Service Water Actuation ENS 457262010-02-25T19:18:00025 February 2010 19:18:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Containment Isolation Valves ENS 435552007-06-09T09:11:0009 June 2007 09:11:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of the 'C' Emergency Diesel Generator ENS 424892006-03-11T09:32:00011 March 2006 09:32:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Containment Isolation Valves ENS 407662004-04-04T18:57:0004 April 2004 18:57:00 10 CFR 50.73(a)(1), Submit an LER 60 -Day Report: Invalid Actuation of the "E" Emergency Diesel Generator ENS 407332004-03-21T16:32:00021 March 2004 16:32:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Containment Isolation Signals in More than One System ENS 401732003-08-29T14:25:00029 August 2003 14:25:00 10 CFR 50.73(a)(1), Submit an LER Invalid Actuation of Containment Isolation Valves 2019-04-18T05:10:00 | |