"But while TEPCO had initially said that the lethal earthquake had not caused any leaks, it revealed later on Monday night that 1,200 liters of radioactive water had sloshed into the sea from its Kashiwazaki-Kariwa plant in Niigata." ... "Also on Tuesday, the company admitted that a small amount of radioactive materials -- cobalt-60, iodine and chromium-51 -- had been emitted into the atmosphere."