ENS Event | |
|---|---|
01:54 Sep 23, 2010 | |
| Title | Notification of Unusual Event Due to a Transformer Fire |
| Event Description | At 2132 [EDT] on 9/22/2010, [the licensee] received a breaker tripout associated with the intertie transformer. Switching was ongoing in the switchyard at the time. At 2135 [EDT], the MCR [Main Control Room] was notified that flames were present on the A intertie transformer. NOUE was declared at 2154 [EDT]. The state of Tennessee was notified at 2200 [EDT]. There have been no observable effects on other plant equipment or structures at this time. This occurrence does not affect safety related equipment.
Flames were extinguished at 2154" [EDT]. The intertie transformer converts power between the 500 kV and 161 kV power lines. The transformer spilled an unknown quantity of oil into the gravel sump surrounding the transformer. The fire was extinguished by the onsite fire brigade and no offsite assistance was required. The licensee notified the NRC Resident Inspector.
The licensee terminated the Unusual Event based on the fire being extinguished and no further action is needed. The licensee is in the process of tagging out the failed transformer. Notified the R2DO (Hopper), NRR EO (Lee), IRD (Marshall), DHS (Kettleson) and FEMA (O'Connell).
|
| Where | |
|---|---|
Sequoyah  Tennessee (NRC Region 2) | |
| Reporting | |
| Emergency class: | Unusual Event |
| 10 CFR 50.72(a) (1) (i), Emergency Class Declaration | |
| Time - Person (Reporting Time:+-3.5 h-0.146 days <br />-0.0208 weeks <br />-0.00479 months <br />) | |
| Opened: | Debbie Travis 22:24 Sep 22, 2010 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Sep 22, 2010 |
| 46270 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (85 %) |
| After | Power Operation (85 %) |
Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 558662022-04-29T03:55:00029 April 2022 03:55:00
[Table view]10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notice of Unusual Event ENS 537542018-11-26T05:00:00026 November 2018 05:00:00 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 Declared for Excessive Smoke in Containment ENS 476602012-02-12T13:34:00012 February 2012 13:34:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Unusual Event Due to Electrical Fault in 161 Kv Switchyard ENS 462702010-09-23T01:54:00023 September 2010 01:54:00 10 CFR 50.72(a)(1)(i), Emergency Class Declaration Notification of Unusual Event Due to a Transformer Fire ENS 401132003-08-28T20:04:00028 August 2003 20:04:00 10 CFR 50.72(b)(2)(iv)(B), RPS System Actuation, 10 CFR 50.72(a)(1)(i), Emergency Class Declaration, 10 CFR 50.72(b)(3)(iv)(A), System Actuation Alert Declared Due to Reactor Protection System Failure 2022-04-29T03:55:00 | |