Via NHK News :
" Workers at the damaged Fukushima Daiichi nuclear plant are bracing for more powerful aftershocks while continuing their efforts to clear the compound of radioactive wastewater.
Highly contaminated water has pooled inside turbine buildings and tunnels, hampering efforts to restore reactor cooling systems.
The plant's operator, Tokyo Electric Power Company, transferred about 660 tons of wastewater from the Number 2 reactor tunnel to a turbine condenser on Wednesday.
As a result, the water level in the tunnel dropped by 8 centimeters. But it was up again by 3 centimeters as of Thursday morning."