ENS 46270

v t e 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. * * UPDATE FROM TRAVIS TO KLCO ON 9/22/10 AT 2327 * * * 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). * * UPDATE FROM TRAVIS TO HUFFMAN ON 9/23/10 AT 0035 EDT * * * The licensee plans to issue a media / press release concerning this event. Notified the R2DO (Hopper).

ENS 46270 +/-
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
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v • d • e

v t e Emergency Notification System
Sequoyah with 10 CFR 50.72(a)(1)(i), Emergency Class Declaration
WEEKMONTHYEAR2022-04-29T03:55:00 [Table view]
[ENS list for Sequoyah]

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