The plant's Unit 3 is undergoing scheduled work that requires taking the generator out of service.
The Columbia Generating Station was shut down early Thursday morning after operators identified problems with the pumps responsible for circulating water through the reactor's core.
The plant was shut down six days ago after a problem was detected.
No date to restart the plant near Richland, Wash., has been set, as an investigation is conducted.
The Columbia Generating Station was successfully connected to the regional power grid on February 17 after being offline due ...
C-17 Globemaster III transports lifted off from March Air Reserve Base this weekend carrying something no Globemaster had ...