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Geohazard/Seismic Events Near TVA nuclear sites – (Potential Technological Hazard): Tennessee

2016/06/22

Earthquakes near Watts Bar and Sequoya Nuclear Generating Stations

M2.3 – 8km S of Sweetwater, Tennessee

Time: 2016-06-21 20:45:04 (UTC)
Location: 35°31’37.2″N 84°27’46.8″W
Depth: 18.0 km (11.2 mi)

M2.6 – 12km N of Hopewell, Tennessee

Time: 2016-06-17 14:38:15 (UTC)
Location: 35°21’00.0″N 84°52’22.8″W
Depth: 18.0 km (11.2 mi)

Earthquake near Watts Bar and Sequoya nuclear plants

via 2.2 Quake in Sweetwater Tenn. is close to 2 nuke plants — The Louisiana Sinkhole Bugle

More Information

CERI – Recent Central and Eastern U.S. Earthquake Map (interactive)


See Also

USGS: [Quakes] in the eastern U.S. can travel much farther and cause damage over larger areas than previously thought [and] damaging effects can extend over a much larger area… the farthest landslide from the 2011 Virginia earthquake was 245 km from the epicenter. This is by far the greatest landslide distance recorded from any other earthquake of similar magnitude… [This quake] occurred in an area 20 times larger than expected [and] landslide distances… are remarkable… [it’s] the largest distance limit ever recorded…

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January 16, 2015 

Official: Fissures in earth now suspected under dam upstream of nuke plants — “There’s plenty of rumors… We’re considering all possibilities… Leak is actually in embankment, that’s where all the focus is” — Speculation that problem to go on for years — New drone footage shows excavation in progress (VIDEO) 

Follow-up to: ‘Sinkhole develops under dam in US — 7 nuclear reactors downstream — NRC notified of ‘stability issues’, plants begin evaluating potential flood impacts‘ and ‘Muddy seepage coming up near foundation of Boone Dam — Officials working around clock, using submarines and ground-penetrating radar

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October 30, 2014

NRC, OFFSITE NOTIFICATION AND PRESS RELEASE REGARDING BOONE DAM STABILITY ISSUES

“On October 30, 2014, at 1100 EDT, TVA conducted a briefing for government officials and other stakeholders regarding the decision to accelerate the Boone Reservoir (36°26′25″N 082°26′18″W) annual drawdown after discovery of a sink hole near the base of the embankment and a small amount of water and sediment found seeping from the river below the dam. TVA is continuously monitoring the dam and conducting an investigation to determine the source of the water seepage.

“The dam is located upstream of all three TVA nuclear sites. There are currently no nuclear plant operability or safety issues, and TVA is assessing the impacts on the plant licensing bases.

“A press release was issued at approximately 1300 EDT.

“This notification is being made in accordance with 10 CFR 50.72(b)(2)(xi) due to notification of other government agencies and a news release.

“The NRC Senior Resident Inspector was notified.”

The licensee is evaluating this event for potential impact on the design basis flooding level.

Facilities impacted:

SEQUOYAH NUCLEAR GENERATING STATION, Tennessee: 35°13′35″N 85°5′30″W
WATTS BAR NUCLEAR GENERATING STATION, Tennessee: 35°36’10.0″N 84°47’22.0″W
BROWNS FERRY NUCLEAR GENERATING STATION, Alabama: 34° 42.233 N,  87° 7.117 W

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Recently Reported Events

SEQUOYAH: Nuclear Event in USA on Wednesday, 08 June, 2016 at 15:26 [EDT] UNANALYZED CONDITION THAT COULD POTENTIALLY DEGRADE PLANT SAFETY

BROWNS FERRY: Nuclear Event in USA on Friday, 17 June, 2016 at 12:22 [CDT] OFFSITE NOTIFICATION DUE TO ELEVATED TRITIUM DETECTED ONSITE

WATTS BAR: Nuclear Event in USA on Monday, 20 June, 2016 at 15:40 [EDT]. AUTOMATIC REACTOR TRIP

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