ENS 43555
ENS Event | |
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09:11 Jun 9, 2007 | |
Title | Invalid Actuation of the 'C' Emergency Diesel Generator |
Event Description | This 60-day notification is being made in accordance with 10 CFR 50.73(a)(1), which states that in case of an invalid actuation reported under 10 CFR 50.73(a)(2)(iv), other than the actuation of the Reactor Protection System when the reactor is critical, the licensee may provide a telephone notification to the NRC within 60 days after discovery of the event instead of submitting a written LER.
On 6/9/07 at approximately 0511 hours0.00591 days <br />0.142 hours <br />8.449074e-4 weeks <br />1.944355e-4 months <br />, the 'C' Emergency Diesel Generator (EDG) and associated 'C' Emergency Service Water pump unexpectedly started while performing procedure TP-024-147, Diesel Generator 'C' Restoration after being out of service for scheduled overhaul and corrective maintenance activities. The EDG inadvertently started in response to an invalid emergency start signal that occurred when the incorrect states ink (SL-8) was opened in panel 0C521C. The cause of this event was due to a human performance error. The EDG was subsequently shutdown following the inadvertent start. Post- maintenance testing of the 'C' EDG was successfully completed. The consequences of this event are limited to the unplanned start of the 'C' EDG. The EDG started and functioned in accordance with its design. Since no actual plant condition existed which required the EDG to start, and since the start occurred inadvertently as a result of human error, this event has been classified as an invalid actuation. The NRC Resident Inspector has been notified. |
Where | |
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Susquehanna ![]() Pennsylvania (NRC Region 1) | |
Reporting | |
10 CFR 50.73(a)(1), Submit an LER, Invalid Actuation | |
Time - Person (Reporting Time:+1443.92 h60.163 days <br />8.595 weeks <br />1.978 months <br />) | |
Opened: | Martin Lichtner 13:06 Aug 8, 2007 |
NRC Officer: | Bill Huffman |
Last Updated: | Aug 8, 2007 |
43555 - NRC Website
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Unit 1 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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 | |