TEPCO says it discovered highly contaminated water leaking from a tank . An estimated 100 metric tons spilled over a barrier and onto the tank , it says . The company says it has shut off the flow of water into the tank and the leak has stopped . TEPCO has struggled to remove the vast amounts of tainted water at crippled levels .
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 . TEPCO has struggled to manage the vast amounts of tainted water at crippled plant .