ENS 41946
ENS Event | |
|---|---|
15:41 Aug 25, 2005 | |
| Title | Unusual Event Declared Due to Fire in Protected Area |
| Event Description | At 1125 on 8/25/05, the 'B' condensate pump tripped. Upon investigation, the turbine building operator noticed smoke coming from the pump motor. There was no visible flame at this time. In response, the 'A' condensate pump was started. Due to a suspected malfunction of the 'A' condensate pump discharge valve, a low water level condition developed in the deaerator storage tank. The order was then given to manually trip the reactor. However, before the operator could complete this action, the low level condition automatically tripped the feedwater pumps and the main turbine which by design tripped the reactor at 1133.
A Notification of Unusual Event (NUE) was declared at 1141 due to a fire in the protected area lasting for more than 15 minutes. The fire was initially extinguished at 1200. Subsequently, a small flame was noted within the pump motor housing upon removal of an inspection cover at 1253. The fire was ultimately extinguished at 1317. The plant is currently stable in mode 3. According to current indications, all safety systems operated as required. The fire was fully contained within the pump motor housing and did not cause any collateral damage. No radioactivity was released to the environment and there were no injuries. The licensee requested offsite assistance from the Fairfield Fire Department. All control rods fully inserted from the automatic trip. Decay heat was being removed via emergency feedwater into the steam generators through the steam dumps into the main condenser. Normal offsite power was available and electrical power was in normal alignment. The licensee notified the NRC Resident Inspector. The licensee notified state and local government agencies.
At 1327 the licensee terminated the Unusual Event. The licensee was continuing to investigate the cause of the automatic reactor trip and the fire. Notified R2DO (D. Ayers), NRR EO (I. Jung), IRD Manager (P. Wilson), FEMA (K. Sweetser), and DHS (Krause). |
| Where | |
|---|---|
Summer  South Carolina (NRC Region 2) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.57 h-0.149 days <br />-0.0212 weeks <br />-0.00489 months <br />) | |
| Opened: | Rick Guerra 12:07 Aug 25, 2005 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Aug 25, 2005 |
| 41946 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | A/R |
| Before | Power Operation (100 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 546882020-05-01T16:53:0001 May 2020 16:53:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Due to Fire in Non-Safety Related Electrical Switchgear ENS 511352015-06-07T09:25:0007 June 2015 09:25:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notice of Unusual Event for Security Condition Due to Non-Hostile Action ENS 498312014-02-15T03:45:00015 February 2014 03:45:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notice of Unusual Event Due to Earthquake Felt Onsite ENS 480772012-07-08T16:02:0008 July 2012 16:02:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared for a Fire Alarm in the Reactor Building ENS 455152009-11-22T21:00:00022 November 2009 21:00:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Fire in the 1A Switchgear Room ENS 419462005-08-25T15:41:00025 August 2005 15:41:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to Fire in Protected Area ENS 416652005-05-04T18:10:0004 May 2005 18:10:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Declared Due to a Fire Lasting More than 15 Minutes 2020-05-01T16:53:00 | |