All three Browns Ferry units (identical to Fukushima’s) are knocked off-line.
I recently wrote about my on-site experience with the Browns Ferry nuclear power plant. This plant is virtually a twin of Japan’s Fukushima power plant. Both use the General Electric Mark 1 Boiling Water Reactor (BWR) and were built between 1965 and 1974.
Yesterday, giant storms roared through the Birmingham, Alabama area and knocked out high voltage power lines that feed the Browns Ferry plant. This triggered shutdowns of all 3 reactors and probably start-up of the plant’s Diesel generators, to cool the reactors’ cores.
In a press release last night, TVA stated “The three units at the Browns Ferry Nuclear Plant in northern Alabama automatically shutdown as a result of transmission line damage from the storm. The plant is safely shutdown and is using a combination of offsite transmission lines and on-site diesel generators to provide power to the plant. At 4:36 p.m. (central time) Browns Ferry declared an “Unusual Event,” due to the automatic shutdown of the plant. An Unusual Event is the lowest level of emergency at a U.S. nuclear plant. I’d like to emphasize that the nuclear plant is performing as designed… and all systems are operating safely.”
Read GE’s description of updates to its Mark 1 BWR. This was published after the Fukushima power plant failure.
Here’s my experience inside Browns Ferry nuclear plant.