TEPCO says it discovered highly contaminated water leaking from a tank . An estimated 100 metric tons flowed over a barrier and onto the ground , it says . The company says it has shut off the flow of water into the tank and the leak has stopped . A large amount of radioactive water has leaked from a holding tank at Japan 's troubled Fukushima Daiichi nuclear power plant , its operator said Thursday . Comment:
TEPCO says it discovered highly contaminated water leaking from a tank . An estimated 100 metric tons flowed over a barrier and onto the ground , it says . The company says it has shut off the flow of water into the tank and the leak has stopped . Comment: