ENS 41558
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ENS Event | |
|---|---|
19:02 Apr 1, 2005 | |
| Title | Emergency Diesel Generator Start Due to a Partial Loss of Offsite Power |
| Event Description | The following information was provided by the licensee via fax (licensee text in quotes):
With the plant in mode 6 and refueling operations in progress, a loss of offsite power circuit 751 occurred. This loss of power caused an undervoltage condition on safeguards busses 16 and 17 and an automatic start of Emergency Diesel Generator 1B. Both of these busses were subsequently energized by the diesel. Refueling operations in progress were immediately halted. Core cooling was momentarily interrupted and restored upon safeguards bus reenergization. The spent fuel pool cooling loop in operation was powered from the opposite train and hence was not interrupted. RCS temperature was maintained at 74 degrees Fahrenheit and spent fuel pool temperature was also at 74 degrees Fahrenheit throughout the event. This partial loss of power was due to a substation transformer fault (one of two offsite power sources were lost). The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Ginna  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
| Time - Person (Reporting Time:+-2.53 h-0.105 days <br />-0.0151 weeks <br />-0.00347 months <br />) | |
| Opened: | Kevin Mclaughlin 16:30 Apr 1, 2005 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Apr 1, 2005 |
| 41558 - NRC Website
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WEEKMONTHYEARENS 567902023-10-13T01:27:00013 October 2023 01:27:00
[Table view]10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Manual Reactor Trip ENS 567312023-09-09T15:43:0009 September 2023 15:43:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip ENS 555042021-10-04T04:31:0004 October 2021 04:31:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Valid System Actuation ENS 536962018-10-26T04:00:00026 October 2018 04:00:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation, 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness Automatic Start of the Emergency Diesel Generator and Loss of Radiation Monitor ENS 517302016-02-12T04:05:00012 February 2016 04:05:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Emergency Diesel Generator Auto-Started Due to the Loss of a Station Service Transformer ENS 492142013-07-24T18:19:00024 July 2013 18:19:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip from Full Power ENS 479882012-06-03T06:39:0003 June 2012 06:39:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Autostart of "B" Edg Due to Loss of Offsite Power Circuit 767 ENS 473382011-10-12T03:28:00012 October 2011 03:28:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip Due to Turbine Auto Stop Valve Closure ENS 469172011-06-03T04:39:0003 June 2011 04:39:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Unexpected Emergency Diesel Generator Actuation ENS 432432007-03-17T02:09:00017 March 2007 02:09:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip Caused by Safety Injection Signal ENS 431282007-01-28T01:40:00028 January 2007 01:40:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Automatic Reactor Trip Due to Loss of Load Transient Caused by Ehc Problem ENS 417652005-06-10T17:51:00010 June 2005 17:51:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Loss of Offsite Bus Due to a Lighting Strike with Actuation of Emergency Diesel Generator ENS 415582005-04-01T19:02:0001 April 2005 19:02:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Emergency Diesel Generator Start Due to a Partial Loss of Offsite Power ENS 414142005-02-17T02:12:00017 February 2005 02:12:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Reactor Trip Due to Turbine Trip as a Result of Failed Power Supply ENS 403192003-11-13T14:54:00013 November 2003 14:54:00 10 CFR 50.72(b)(3)(iv)(A), System Actuation Auto Start and Loading of the "B" Emergency Diesel Generator ENS 402482003-10-15T14:24:00015 October 2003 14:24:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(b)(3)(iv)(A), System Actuation a Manual Reactor Trip from 1% Power as Per Abnormal Operating Procedures Occurred 2023-09-09T15:43:00 | |
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