The nuclear plant's operator, Tokyo Electric Power Co (TEPCO), has been pumping sea water into the reactors to cool the nuclear core, and then discharging the water, after it has become contaminated, back into the Pacific Ocean.
TEPCO had planned to stop the discharge on Saturday, but work was interrupted by a powerful aftershock late on Thursday. The firm then pushed the target back to Sunday, a goal it failed to meet.
"We are making checks on remaining water, and the final check is scheduled for tomorrow," a company spokesman told a press briefing late on Sunday.
TEPCO was forced to start pumping sea water into the power plant after failing to restart the reactors' cooling systems after the quake. It has been pumping in nitrogen to cool the core, but officials say they are unsure of what to do next.
"We cannot say what the outlook is for the next stage," Hidehiko Nishiyama, a deputy director-general of the Nuclear and Industrial Safety Agency (NISA) said on Sunday. "As soon as possible we would like to achieve stable cooling and set a course toward controlling radiation."
Source: huffingtonpost