ENS 51137
ENS Event | |
|---|---|
03:59 Jun 8, 2015 | |
| Title | Unusual Event - Fire in Protected Area Lasting Greater than 15 Minutes |
| Event Description | At 2359 EDT on June 7, 2015, the Grand Gulf Nuclear Station declared a Notice of Unusual Event in accordance with Emergency Action Level HU4 for a fire in the protected area lasting greater than 15 minutes. The fire started in the wiring of a terminal box for Electro Hydraulic Pump C, the running pump located in the turbine building. The running pump was then deenergized by operators and the standby pump started. The site fire brigade responded and extinguished the fire. The emergency was terminated at 0030 on June 8, 2015.
The licensee notified state and local agencies and will inform the NRC Resident Inspector. Notified DHS SWO, FEMA Ops Center, NICC Watch Officer, and FEMA NWC and Nuclear SSA via email.
The notification of an Unusual Event is being retracted because the event did not meet the definition of 'fire' in NEI 99-01 Revision 5, 'Methodology of the Development of Emergency Action Levels'. The document was endorsed by the NRC on February 22, 2008 (see ADAMS ascension # ML080450149) and is part of the Grand Gulf Nuclear Station's current licensing basis. Per the guidance, a 'fire' is defined as: 'Combustion characterized by heat and light. Sources of smoke such as slipping drive belts or overheated electrical equipment do not constitute as 'fires'. Observation of flame is preferred but is NOT required if large quantities of smoke and heat are observed.' According to eyewitness reports from personnel, flames were not observed at any time and evidence of large quantities of heat and smoke were not observed. Additionally, the definition of 'fire' specifically excludes overheated electrical equipment. This information leads to the conclusion that the event did not meet the definition of a 'fire' per NEI 99-01 Revision 5. Therefore, the event is not an immediately reportable Unusual Event under 10 CFR 50.72(a)(1)(i). The licensee notified the NRC Resident Inspector and will notify the state and local governments. Notified the R4DO (Haire) and NRR EO (Morris via e-mail). |
| Where | |
|---|---|
Grand Gulf  Mississippi (NRC Region 4) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.23 h-0.135 days <br />-0.0192 weeks <br />-0.00442 months <br />) | |
| Opened: | Ronnie Walters 00:45 Jun 8, 2015 |
| NRC Officer: | Dan Livermore |
| Last Updated: | Jul 9, 2015 |
| 51137 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (92 %) |
| After | Power Operation (92 %) |
WEEKMONTHYEARENS 550562021-01-07T07:24:0007 January 2021 07:24:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Rise in Drywell Unidentified Reactor Coolant System Leakage ENS 511372015-06-08T03:59:0008 June 2015 03:59:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event - Fire in Protected Area Lasting Greater than 15 Minutes ENS 491362013-06-19T19:10:00019 June 2013 19:10:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Co2 Release in the Auxiliary Building ENS 490252013-05-12T22:43:00012 May 2013 22:43:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Due to Fire on Auxiliary Transformer Inside Protected the Area ENS 478252012-04-11T23:26:00011 April 2012 23:26:00 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Due to a Fire in the 'A' Main Condenser ENS 446622008-11-17T15:25:00017 November 2008 15:25:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Fire in Protected Area Lasting Greater than 15 Minutes 2021-01-07T07:24:00 | |