ENS 47045

v t e ENS Event
04:23 Jul 13, 2011
Title	Overflow of Condenser Circulating Water
Event Description	At 0023 on 07/13/2011, a notification to an outside state agency, Tennessee Department of Environment and Conservation (TDEC), was made due to an overflow of Condenser Circulating Water from the northwest corner of the diffuser pond through a heavily vegetated area into a slough adjacent to the Sequoyah Training Center. Condenser Circulating Water is also discharging to the river via storm water outfall 14 near the cooling towers as well as the normal diffuser pond discharge at outfall 101. At approximately 1545 on 07/12/2011, one of the two diffuser gates at Sequoyah failed and shut off the west diffuser pipe. The other diffuser remained open throughout the event. Plant personnel made several attempts to raise the diffuser gate utilizing divers and cranes. When it was determined the crane could not lift the diffuser gate, both units reduced power to 85% and one (1) Condenser Circulating Water pump for each unit, two (2) pumps total, were removed from service. Diffuser pond level is currently lowering. The NRC Resident Inspector has been informed.

ENS 47045 +/-
Where
Sequoyah Tennessee (NRC Region 2)
Reporting

10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
Time - Person (Reporting Time:+-3.25 h-0.135 days <br />-0.0193 weeks <br />-0.00445 months <br />)
Opened:	Matt Leenerts 01:08 Jul 13, 2011
NRC Officer:	Charles Teal
Last Updated:	Jul 13, 2011
47045 - NRC Website
v • d • e

v t e Emergency Notification System
Sequoyah with 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release
WEEKMONTHYEAR		Offsite Notification - Oil Spill 2023-06-27T12:31:00 [Table view]
[ENS list for Sequoyah]

Navigation menu